using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
using DCIT.App.Presentation;
using DCIT.Core.Models;
using DCIT.Core.Services;
using DCIT.Core.Utilities;

namespace DCIT.App.Forms
{
    public sealed class MainForm : Form
    {
        private readonly ConfigurationService _configurationService;
        private readonly LogService _logService;
        private readonly FileScanService _fileScanService;
        private readonly RuleService _ruleService;
        private readonly AutoExtractService _autoExtractService;
        private readonly IDocumentProcessingService _documentProcessingService;
        private readonly IUserDialogService _dialogService;
        private readonly BatchExecutionPlanner _batchExecutionPlanner = new BatchExecutionPlanner();

        private readonly BindingList<FileScanItem> _replaceItems = new BindingList<FileScanItem>();
        private readonly BindingList<FileScanItem> _restoreItems = new BindingList<FileScanItem>();
        private readonly BindingList<RuleDefinition> _rules = new BindingList<RuleDefinition>();

        private readonly TabControl _tabControl = new TabControl();
        private readonly TabPage _replaceTab = new TabPage("替换");
        private readonly TabPage _restoreTab = new TabPage("恢复");
        private readonly TabPage _settingsTab = new TabPage("设置");

        private readonly TextBox _txtReplaceSource = new TextBox();
        private readonly TextBox _txtReplaceOutput = new TextBox();
        private readonly TextBox _txtRuleFile = new TextBox();
        private readonly TextBox _txtRestoreSource = new TextBox();
        private readonly TextBox _txtRestoreOutput = new TextBox();
        private readonly ComboBox _cmbRestoreDiffInput = new ComboBox();

        private readonly DataGridView _gridReplace = new DataGridView();
        private readonly DataGridView _gridRestore = new DataGridView();
        private readonly DataGridView _gridRules = new DataGridView();
        private SplitContainer _settingsRuleListSplitContainer;
        private readonly RichTextBox _logBox = new RichTextBox();
        private readonly ContextMenuStrip _logContextMenu = new ContextMenuStrip();
        private readonly ContextMenuStrip _replaceGridContextMenu = new ContextMenuStrip();
        private readonly ContextMenuStrip _restoreGridContextMenu = new ContextMenuStrip();
        private readonly ContextMenuStrip _ruleGridContextMenu = new ContextMenuStrip();

        private readonly Button _btnAutoExtract = new Button();
        private readonly Button _btnStartReplace = new Button();
        private readonly Button _btnStopReplace = new Button();
        private readonly Button _btnStartRestore = new Button();
        private readonly Button _btnStopRestore = new Button();
        private readonly Button _btnBrowseReplaceSource = new Button();
        private readonly Button _btnBrowseReplaceOutput = new Button();
        private readonly Button _btnSelectAllReplace = new Button();
        private readonly Button _btnClearReplace = new Button();
        private readonly Button _btnBrowseRestoreSource = new Button();
        private readonly Button _btnBrowseRestoreOutput = new Button();
        private readonly Button _btnSelectAllRestore = new Button();
        private readonly Button _btnClearRestore = new Button();
        private readonly Button _btnUndoAutoExtract = new Button();
        private readonly Button _btnSaveRules = new Button();
        private readonly Button _btnOpenRules = new Button();

        private readonly ProgressBar _replaceTotalProgress = new ProgressBar();
        private readonly ProgressBar _replaceFileProgress = new ProgressBar();
        private readonly ProgressBar _restoreTotalProgress = new ProgressBar();
        private readonly ProgressBar _restoreFileProgress = new ProgressBar();

        private readonly Label _lblReplaceRuntime = new Label();
        private readonly Label _lblRestoreRuntime = new Label();

        private readonly CheckBox _chkJsonDiffEncryption = new CheckBox();
        private readonly CheckBox _chkEnableImageReplacement = new CheckBox();
        private readonly CheckBox _chkUseFixedImageSeed = new CheckBox();
        private readonly CheckBox _chkExtractKeywords = new CheckBox();
        private readonly CheckBox _chkExtractWords = new CheckBox();
        private readonly CheckBox _chkExtractSentences = new CheckBox();
        private readonly CheckBox _chkKeywordFrequency = new CheckBox();
        private readonly CheckBox _chkKeywordTfIdf = new CheckBox();
        private readonly CheckBox _chkKeywordTextRank = new CheckBox();
        private readonly CheckBox _chkChineseWords = new CheckBox();
        private readonly CheckBox _chkEnglishWords = new CheckBox();
        private readonly CheckBox _chkChineseSentences = new CheckBox();
        private readonly CheckBox _chkEnglishSentences = new CheckBox();
        private readonly CheckBox _chkExcludeEmails = new CheckBox();
        private readonly NumericUpDown _numKeywordCount = new NumericUpDown();
        private readonly NumericUpDown _numWordCount = new NumericUpDown();
        private readonly NumericUpDown _numSentenceCount = new NumericUpDown();
        private readonly NumericUpDown _numFixedImageSeed = new NumericUpDown();
        private readonly NumericUpDown _numMinChineseLength = new NumericUpDown();
        private readonly NumericUpDown _numMinEnglishLength = new NumericUpDown();
        private readonly TextBox _txtSentenceDelimiters = new TextBox();

        private AppConfig _config;
        private ConfigurationLoadResult _configurationLoadResult;
        private RuleFile _ruleFile = new RuleFile();
        private List<string> _lastAutoExtractRuleIds = new List<string>();

        private CancellationTokenSource _replaceScanCancellation;
        private CancellationTokenSource _restoreScanCancellation;
        private CancellationTokenSource _autoExtractCancellation;
        private CancellationTokenSource _replaceExecutionCancellation;
        private CancellationTokenSource _restoreExecutionCancellation;
        private bool _isAutoExtractRunning;
        private bool _isReplaceRunning;
        private bool _isRestoreRunning;
        private bool _skipConfigSaveOnClose;
        private bool _settingsRuleListInitialWidthApplied;
        private int _lastReplaceRuntimeFlushTick;
        private int _lastRestoreRuntimeFlushTick;

        private const int RuntimeUiRefreshIntervalMilliseconds = 100;

        public MainForm(
            ConfigurationService configurationService,
            LogService logService,
            FileScanService fileScanService,
            RuleService ruleService,
            AutoExtractService autoExtractService,
            IDocumentProcessingService documentProcessingService,
            IUserDialogService dialogService)
        {
            _configurationService = configurationService;
            _logService = logService;
            _fileScanService = fileScanService;
            _ruleService = ruleService;
            _autoExtractService = autoExtractService;
            _documentProcessingService = documentProcessingService;
            _dialogService = dialogService;

            _configurationLoadResult = _configurationService.Load();
            _config = _configurationLoadResult.Config;

            Text = "WORD 2007 格式调整软件";
            StartPosition = FormStartPosition.CenterScreen;
            MinimumSize = new Size(1400, 900);
            Width = 1600;
            Height = 980;
            Font = new Font("Microsoft YaHei UI", 9F);

            InitializeLayout();
            BindData();
            ApplyConfigToUi();

            _logService.EntryWritten += LogService_EntryWritten;
            _logService.WriteFailed += LogService_WriteFailed;
            FormClosing += MainForm_FormClosing;
            Shown += MainForm_Shown;
        }

        private void InitializeLayout()
        {
            var splitContainer = new SplitContainer
            {
                Dock = DockStyle.Fill,
                Orientation = Orientation.Horizontal,
                SplitterDistance = 720,
            };

            _tabControl.Dock = DockStyle.Fill;
            _tabControl.TabPages.Add(_replaceTab);
            _tabControl.TabPages.Add(_restoreTab);
            _tabControl.TabPages.Add(_settingsTab);

            splitContainer.Panel1.Controls.Add(_tabControl);

            _logBox.Dock = DockStyle.Fill;
            _logBox.ReadOnly = true;
            _logBox.BackColor = Color.White;
            _logBox.Font = new Font("Consolas", 10F);
            splitContainer.Panel2.Controls.Add(_logBox);

            Controls.Add(splitContainer);

            BuildReplaceTab();
            BuildRestoreTabV2();
            BuildSettingsTab();
            ConfigureContextMenus();
        }

        private void BuildReplaceTab()
        {
            var root = new TableLayoutPanel
            {
                Dock = DockStyle.Fill,
                ColumnCount = 1,
                RowCount = 3,
            };
            root.RowStyles.Add(new RowStyle(SizeType.AutoSize));
            root.RowStyles.Add(new RowStyle(SizeType.Percent, 100F));
            root.RowStyles.Add(new RowStyle(SizeType.AutoSize));

            var pathPanel = new TableLayoutPanel
            {
                Dock = DockStyle.Top,
                ColumnCount = 6,
                AutoSize = true,
                Padding = new Padding(8),
            };
            pathPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Absolute, 110F));
            pathPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 50F));
            pathPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Absolute, 120F));
            pathPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Absolute, 110F));
            pathPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 50F));
            pathPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Absolute, 120F));

            _btnBrowseReplaceSource.Text = "选择原始文件夹";
            _btnBrowseReplaceSource.Dock = DockStyle.Fill;
            _btnBrowseReplaceOutput.Text = "选择替换文件夹";
            _btnBrowseReplaceOutput.Dock = DockStyle.Fill;
            _btnSelectAllReplace.Text = "全选";
            _btnSelectAllReplace.AutoSize = true;
            _btnClearReplace.Text = "全不选";
            _btnClearReplace.AutoSize = true;
            _btnAutoExtract.Text = "自动提取";
            _btnStartReplace.Text = "开始替换";
            _btnStopReplace.Text = "停止";
            _btnStopReplace.Enabled = false;
            _lblReplaceRuntime.AutoSize = true;
            _lblReplaceRuntime.Text = "当前文件 0/0 | 当前规则 - | 当前文件命中 0 | 累计命中 0";

            AddLabeledRow(pathPanel, 0, "原始文件夹", _txtReplaceSource, _btnBrowseReplaceSource, "替换文件夹", _txtReplaceOutput, _btnBrowseReplaceOutput);

            _btnBrowseReplaceSource.Click += async delegate { await BrowseFolderIntoTextBoxAsync(_txtReplaceSource, RefreshReplaceScanAsync); };
            _btnBrowseReplaceOutput.Click += async delegate { await BrowseFolderIntoTextBoxAsync(_txtReplaceOutput, RefreshReplaceScanAsync); };
            _txtReplaceSource.Leave += async delegate { await RefreshReplaceScanAsync(); };
            _txtReplaceOutput.Leave += async delegate { await RefreshReplaceScanAsync(); };
            _btnSelectAllReplace.Click += delegate { SetSelection(_replaceItems, true); };
            _btnClearReplace.Click += delegate { SetSelection(_replaceItems, false); };
            _btnAutoExtract.Click += async delegate { await RunAutoExtractAsync(); };
            _btnStartReplace.Click += StartReplaceExecution_Click;
            _btnStopReplace.Click += StopReplaceOrAutoExtract_Click;

            ConfigureFileGrid(_gridReplace, isRestoreGrid: false);

            var gridPanel = new Panel { Dock = DockStyle.Fill, Padding = new Padding(8, 0, 8, 0) };
            _gridReplace.Dock = DockStyle.Fill;
            gridPanel.Controls.Add(_gridReplace);

            var bottomPanel = new TableLayoutPanel
            {
                Dock = DockStyle.Top,
                ColumnCount = 1,
                AutoSize = true,
                Padding = new Padding(8),
            };

            var buttonPanel = new FlowLayoutPanel
            {
                Dock = DockStyle.Top,
                AutoSize = true,
                FlowDirection = FlowDirection.LeftToRight,
            };
            buttonPanel.Controls.Add(_btnSelectAllReplace);
            buttonPanel.Controls.Add(_btnClearReplace);
            buttonPanel.Controls.Add(_btnAutoExtract);
            buttonPanel.Controls.Add(_btnStartReplace);
            buttonPanel.Controls.Add(_btnStopReplace);

            bottomPanel.Controls.Add(buttonPanel);
            bottomPanel.Controls.Add(CreateProgressLine("总进度", _replaceTotalProgress));
            bottomPanel.Controls.Add(CreateProgressLine("单文件进度", _replaceFileProgress));
            bottomPanel.Controls.Add(_lblReplaceRuntime);

            root.Controls.Add(pathPanel, 0, 0);
            root.Controls.Add(gridPanel, 0, 1);
            root.Controls.Add(bottomPanel, 0, 2);
            _replaceTab.Controls.Add(root);
        }

        private void BuildRestoreTab()
        {
            var root = new TableLayoutPanel
            {
                Dock = DockStyle.Fill,
                ColumnCount = 1,
                RowCount = 3,
            };
            root.RowStyles.Add(new RowStyle(SizeType.AutoSize));
            root.RowStyles.Add(new RowStyle(SizeType.Percent, 100F));
            root.RowStyles.Add(new RowStyle(SizeType.AutoSize));

            var pathPanel = new TableLayoutPanel
            {
                Dock = DockStyle.Top,
                ColumnCount = 6,
                AutoSize = true,
                Padding = new Padding(8),
            };
            pathPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Absolute, 110F));
            pathPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 50F));
            pathPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Absolute, 120F));
            pathPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Absolute, 110F));
            pathPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 50F));
            pathPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Absolute, 120F));

            var btnBrowseRestoreSource = new Button { Text = "选择替换文件夹", Dock = DockStyle.Fill };
            var btnBrowseRestoreOutput = new Button { Text = "选择恢复文件夹", Dock = DockStyle.Fill };
            var btnSelectAllRestore = new Button { Text = "全选", AutoSize = true };
            var btnClearRestore = new Button { Text = "全不选", AutoSize = true };
            _btnStartRestore.Text = "开始恢复";
            _btnStopRestore.Text = "停止";
            _btnStopRestore.Enabled = false;
            _lblRestoreRuntime.AutoSize = true;
            _lblRestoreRuntime.Text = "当前文件 0/0 | 当前规则 - | 当前文件命中 0 | 累计命中 0";

            AddLabeledRow(pathPanel, 0, "替换文件夹", _txtRestoreSource, btnBrowseRestoreSource, "恢复文件夹", _txtRestoreOutput, btnBrowseRestoreOutput);

            btnBrowseRestoreSource.Click += async delegate { await BrowseFolderIntoTextBoxAsync(_txtRestoreSource, RefreshRestoreScanAsync); };
            btnBrowseRestoreOutput.Click += async delegate { await BrowseFolderIntoTextBoxAsync(_txtRestoreOutput, RefreshRestoreScanAsync); };
            _txtRestoreSource.Leave += async delegate { await RefreshRestoreScanAsync(); };
            _txtRestoreOutput.Leave += async delegate { await RefreshRestoreScanAsync(); };
            btnSelectAllRestore.Click += delegate { SetSelection(_restoreItems, true); };
            btnClearRestore.Click += delegate { SetSelection(_restoreItems, false); };
            _btnStartRestore.Click += StartRestoreExecution_Click;

            ConfigureFileGrid(_gridRestore, isRestoreGrid: true);

            var gridPanel = new Panel { Dock = DockStyle.Fill, Padding = new Padding(8, 0, 8, 0) };
            _gridRestore.Dock = DockStyle.Fill;
            gridPanel.Controls.Add(_gridRestore);

            var bottomPanel = new TableLayoutPanel
            {
                Dock = DockStyle.Top,
                ColumnCount = 1,
                AutoSize = true,
                Padding = new Padding(8),
            };

            var buttonPanel = new FlowLayoutPanel
            {
                Dock = DockStyle.Top,
                AutoSize = true,
                FlowDirection = FlowDirection.LeftToRight,
            };
            buttonPanel.Controls.Add(btnSelectAllRestore);
            buttonPanel.Controls.Add(btnClearRestore);
            buttonPanel.Controls.Add(_btnStartRestore);
            buttonPanel.Controls.Add(_btnStopRestore);

            bottomPanel.Controls.Add(buttonPanel);
            bottomPanel.Controls.Add(CreateProgressLine("总进度", _restoreTotalProgress));
            bottomPanel.Controls.Add(CreateProgressLine("单文件进度", _restoreFileProgress));
            bottomPanel.Controls.Add(_lblRestoreRuntime);

            root.Controls.Add(pathPanel, 0, 0);
            root.Controls.Add(gridPanel, 0, 1);
            root.Controls.Add(bottomPanel, 0, 2);
            _restoreTab.Controls.Add(root);
        }

        private void BuildRestoreTabV2()
        {
            var root = new TableLayoutPanel
            {
                Dock = DockStyle.Fill,
                ColumnCount = 1,
                RowCount = 3,
            };
            root.RowStyles.Add(new RowStyle(SizeType.AutoSize));
            root.RowStyles.Add(new RowStyle(SizeType.Percent, 100F));
            root.RowStyles.Add(new RowStyle(SizeType.AutoSize));

            var pathPanel = new TableLayoutPanel
            {
                Dock = DockStyle.Top,
                ColumnCount = 6,
                AutoSize = true,
                Padding = new Padding(8),
            };
            pathPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Absolute, 110F));
            pathPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 50F));
            pathPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Absolute, 120F));
            pathPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Absolute, 110F));
            pathPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 50F));
            pathPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Absolute, 120F));

            _btnBrowseRestoreSource.Text = "选择替换文件夹";
            _btnBrowseRestoreSource.Dock = DockStyle.Fill;
            _btnBrowseRestoreOutput.Text = "选择恢复文件夹";
            _btnBrowseRestoreOutput.Dock = DockStyle.Fill;
            _btnSelectAllRestore.Text = "全选";
            _btnSelectAllRestore.AutoSize = true;
            _btnClearRestore.Text = "全不选";
            _btnClearRestore.AutoSize = true;

            _btnStartRestore.Text = "开始恢复";
            _btnStopRestore.Text = "停止";
            _btnStopRestore.Enabled = false;
            _lblRestoreRuntime.AutoSize = true;
            _lblRestoreRuntime.Text = "当前文件 0/0 | 当前规则 - | 当前文件命中 0 | 累计命中 0";

            _cmbRestoreDiffInput.DropDownStyle = ComboBoxStyle.DropDownList;
            _cmbRestoreDiffInput.Items.Clear();
            _cmbRestoreDiffInput.Items.Add(".diff");
            _cmbRestoreDiffInput.Items.Add(".bmp");
            _cmbRestoreDiffInput.SelectedIndex = 0;

            AddLabeledRow(pathPanel, 0, "替换文件夹", _txtRestoreSource, _btnBrowseRestoreSource, "恢复文件夹", _txtRestoreOutput, _btnBrowseRestoreOutput);
            pathPanel.RowStyles.Add(new RowStyle(SizeType.AutoSize));
            pathPanel.Controls.Add(new Label { Text = "差异文件格式", Anchor = AnchorStyles.Left, AutoSize = true }, 0, 1);
            pathPanel.Controls.Add(_cmbRestoreDiffInput, 1, 1);

            _btnBrowseRestoreSource.Click += async delegate { await BrowseFolderIntoTextBoxAsync(_txtRestoreSource, RefreshRestoreScanAsync); };
            _btnBrowseRestoreOutput.Click += async delegate { await BrowseFolderIntoTextBoxAsync(_txtRestoreOutput, RefreshRestoreScanAsync); };
            _txtRestoreSource.Leave += async delegate { await RefreshRestoreScanAsync(); };
            _txtRestoreOutput.Leave += async delegate { await RefreshRestoreScanAsync(); };
            _cmbRestoreDiffInput.SelectedIndexChanged += async delegate { await RefreshRestoreScanAsync(); };
            _btnSelectAllRestore.Click += delegate { SetSelection(_restoreItems, true); };
            _btnClearRestore.Click += delegate { SetSelection(_restoreItems, false); };
            _btnStartRestore.Click += StartRestoreExecution_Click;
            _btnStopRestore.Click += StopRestore_Click;

            ConfigureFileGrid(_gridRestore, isRestoreGrid: true);

            var gridPanel = new Panel { Dock = DockStyle.Fill, Padding = new Padding(8, 0, 8, 0) };
            _gridRestore.Dock = DockStyle.Fill;
            gridPanel.Controls.Add(_gridRestore);

            var bottomPanel = new TableLayoutPanel
            {
                Dock = DockStyle.Top,
                ColumnCount = 1,
                AutoSize = true,
                Padding = new Padding(8),
            };

            var buttonPanel = new FlowLayoutPanel
            {
                Dock = DockStyle.Top,
                AutoSize = true,
                FlowDirection = FlowDirection.LeftToRight,
            };
            buttonPanel.Controls.Add(_btnSelectAllRestore);
            buttonPanel.Controls.Add(_btnClearRestore);
            buttonPanel.Controls.Add(_btnStartRestore);
            buttonPanel.Controls.Add(_btnStopRestore);

            bottomPanel.Controls.Add(buttonPanel);
            bottomPanel.Controls.Add(CreateProgressLine("总进度", _restoreTotalProgress));
            bottomPanel.Controls.Add(CreateProgressLine("单文件进度", _restoreFileProgress));
            bottomPanel.Controls.Add(_lblRestoreRuntime);

            root.Controls.Add(pathPanel, 0, 0);
            root.Controls.Add(gridPanel, 0, 1);
            root.Controls.Add(bottomPanel, 0, 2);
            _restoreTab.Controls.Add(root);
        }

        private void BuildSettingsTab()
        {
            var root = new TableLayoutPanel
            {
                Dock = DockStyle.Fill,
                ColumnCount = 1,
                RowCount = 3,
            };
            root.RowStyles.Add(new RowStyle(SizeType.AutoSize));
            root.RowStyles.Add(new RowStyle(SizeType.AutoSize));
            root.RowStyles.Add(new RowStyle(SizeType.Percent, 100F));

            var topPanel = new TableLayoutPanel
            {
                Dock = DockStyle.Top,
                ColumnCount = 5,
                AutoSize = true,
                Padding = new Padding(8),
            };
            topPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Absolute, 110F));
            topPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 100F));
            topPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Absolute, 110F));
            topPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Absolute, 110F));
            topPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Absolute, 140F));

            _btnOpenRules.Text = "打开规则";
            _btnSaveRules.Text = "保存规则";
            _btnUndoAutoExtract.Text = "撤销自动提取";
            _btnUndoAutoExtract.Enabled = false;

            topPanel.Controls.Add(new Label { Text = "规则文件", Anchor = AnchorStyles.Left, AutoSize = true }, 0, 0);
            _txtRuleFile.Dock = DockStyle.Fill;
            topPanel.Controls.Add(_txtRuleFile, 1, 0);
            topPanel.Controls.Add(_btnOpenRules, 2, 0);
            topPanel.Controls.Add(_btnSaveRules, 3, 0);
            topPanel.Controls.Add(_btnUndoAutoExtract, 4, 0);

            _btnOpenRules.Click += OpenRules_Click;
            _btnSaveRules.Click += SaveRules_Click;
            _btnUndoAutoExtract.Click += UndoAutoExtract_Click;

            var actionPanel = new FlowLayoutPanel
            {
                Dock = DockStyle.Top,
                AutoSize = true,
                Padding = new Padding(8, 0, 8, 8),
            };

            var btnAddRule = new Button { Text = "新增规则", AutoSize = true };
            var btnDeleteRule = new Button { Text = "删除规则", AutoSize = true };
            var btnMoveUp = new Button { Text = "上移", AutoSize = true };
            var btnMoveDown = new Button { Text = "下移", AutoSize = true };

            btnAddRule.Click += AddRule_Click;
            btnDeleteRule.Click += DeleteRule_Click;
            btnMoveUp.Click += MoveRuleUp_Click;
            btnMoveDown.Click += MoveRuleDown_Click;

            actionPanel.Controls.Add(btnAddRule);
            actionPanel.Controls.Add(btnDeleteRule);
            actionPanel.Controls.Add(btnMoveUp);
            actionPanel.Controls.Add(btnMoveDown);

            var settingsAndGrid = new SplitContainer
            {
                Dock = DockStyle.Fill,
                Orientation = Orientation.Vertical,
                SplitterDistance = 350,
            };
            _settingsRuleListSplitContainer = settingsAndGrid;
            settingsAndGrid.HandleCreated += delegate { ApplySettingsRuleListInitialWidth(settingsAndGrid); };
            settingsAndGrid.SizeChanged += delegate { ApplySettingsRuleListInitialWidth(settingsAndGrid); };
            settingsAndGrid.VisibleChanged += delegate { ApplySettingsRuleListInitialWidth(settingsAndGrid); };
            _tabControl.SelectedIndexChanged += async delegate
            {
                ApplySettingsRuleListInitialWidth(settingsAndGrid);
                await RefreshScanOnTabSwitchAsync();
            };

            settingsAndGrid.Panel1.Controls.Add(BuildAutoExtractSettingsGroup());
            settingsAndGrid.Panel2.Controls.Add(BuildRulesGridPanel());

            root.Controls.Add(topPanel, 0, 0);
            root.Controls.Add(actionPanel, 0, 1);
            root.Controls.Add(settingsAndGrid, 0, 2);
            _settingsTab.Controls.Add(root);
        }

        private void ApplySettingsRuleListInitialWidth(SplitContainer splitContainer)
        {
            if (_settingsRuleListInitialWidthApplied || splitContainer == null || splitContainer.Orientation != Orientation.Vertical)
            {
                return;
            }

            if (splitContainer.ClientSize.Width < 600)
            {
                return;
            }

            var availableWidth = splitContainer.ClientSize.Width - splitContainer.SplitterWidth;
            if (availableWidth <= 0 || availableWidth < splitContainer.Panel1MinSize + splitContainer.Panel2MinSize)
            {
                return;
            }

            var leftWidth = availableWidth / 3;
            var maxLeftWidth = splitContainer.ClientSize.Width - splitContainer.SplitterWidth - splitContainer.Panel2MinSize;
            if (maxLeftWidth < splitContainer.Panel1MinSize)
            {
                return;
            }

            leftWidth = Math.Max(splitContainer.Panel1MinSize, Math.Min(maxLeftWidth, leftWidth));
            splitContainer.SplitterDistance = leftWidth;
            _settingsRuleListInitialWidthApplied = true;
        }

        private void ConfigureContextMenus()
        {
            ConfigureLogContextMenu();
            ConfigureFileGridContextMenu(_gridReplace, _replaceGridContextMenu);
            ConfigureFileGridContextMenu(_gridRestore, _restoreGridContextMenu);
            ConfigureRuleGridContextMenu();
        }

        private void ConfigureLogContextMenu()
        {
            _logContextMenu.Items.Clear();
            _logContextMenu.Items.Add("复制全部内容", null, delegate { CopyAllLogs(); });
            _logContextMenu.Items.Add("清空日志", null, delegate { ClearLogBox(); });
            _logBox.ContextMenuStrip = _logContextMenu;
        }

        private void ConfigureFileGridContextMenu(DataGridView grid, ContextMenuStrip menu)
        {
            menu.Items.Clear();
            menu.Items.Add("删除", null, delegate
            {
                if (ReferenceEquals(grid, _gridReplace))
                {
                    DeleteSelectedFileItems(_replaceItems, grid);
                }
                else
                {
                    DeleteSelectedFileItems(_restoreItems, grid);
                }
            });
            menu.Items.Add("启用", null, delegate { SetSelectedFileItems(grid, true); });
            menu.Items.Add("不启用", null, delegate { SetSelectedFileItems(grid, false); });
            grid.ContextMenuStrip = menu;
        }

        private void ConfigureRuleGridContextMenu()
        {
            _ruleGridContextMenu.Items.Clear();
            _ruleGridContextMenu.Items.Add("删除", null, delegate { DeleteSelectedRules(); });
            _ruleGridContextMenu.Items.Add("启用", null, delegate { SetSelectedRulesEnabled(true); });
            _ruleGridContextMenu.Items.Add("不启用", null, delegate { SetSelectedRulesEnabled(false); });
            _gridRules.ContextMenuStrip = _ruleGridContextMenu;
        }

        private Control BuildAutoExtractSettingsGroup()
        {
            var group = new GroupBox
            {
                Text = "自动提取设置",
                Dock = DockStyle.Fill,
                Padding = new Padding(12),
            };

            var layout = new TableLayoutPanel
            {
                Dock = DockStyle.Fill,
                ColumnCount = 2,
                AutoScroll = true,
            };
            layout.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 55F));
            layout.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 45F));

            _chkJsonDiffEncryption.Text = "JSON 差异文件加密";
            _chkEnableImageReplacement.Text = "启用图片替换";
            _chkUseFixedImageSeed.Text = "使用固定图像随机种子";
            _chkExtractKeywords.Text = "提取关键字";
            _chkExtractWords.Text = "提取高频词";
            _chkExtractSentences.Text = "提取高频句";
            _chkKeywordFrequency.Text = "关键字算法: 词频";
            _chkKeywordTfIdf.Text = "关键字算法: TF-IDF";
            _chkKeywordTextRank.Text = "关键字算法: TextRank";
            _chkChineseWords.Text = "统计中文词";
            _chkEnglishWords.Text = "统计英文词";
            _chkChineseSentences.Text = "统计中文句";
            _chkEnglishSentences.Text = "统计英文句";
            _chkExcludeEmails.Text = "排除邮箱地址";

            ConfigureNumeric(_numKeywordCount, 1, 1000);
            ConfigureNumeric(_numWordCount, 1, 1000);
            ConfigureNumeric(_numSentenceCount, 1, 1000);
            ConfigureNumeric(_numFixedImageSeed, 0, int.MaxValue);
            ConfigureNumeric(_numMinChineseLength, 1, 50);
            ConfigureNumeric(_numMinEnglishLength, 1, 50);

            AddSettingRow(layout, 0, _chkJsonDiffEncryption, new Label());
            AddSettingRow(layout, 1, _chkEnableImageReplacement, new Label());
            AddSettingRow(layout, 2, _chkUseFixedImageSeed, _numFixedImageSeed);
            AddSettingRow(layout, 3, _chkExtractKeywords, _chkKeywordFrequency);
            AddSettingRow(layout, 4, _chkExtractWords, _chkKeywordTfIdf);
            AddSettingRow(layout, 5, _chkExtractSentences, _chkKeywordTextRank);
            AddSettingRow(layout, 6, new Label { Text = "关键字最大数量", Anchor = AnchorStyles.Left, AutoSize = true }, _numKeywordCount);
            AddSettingRow(layout, 7, new Label { Text = "高频词最大数量", Anchor = AnchorStyles.Left, AutoSize = true }, _numWordCount);
            AddSettingRow(layout, 8, new Label { Text = "高频句最大数量", Anchor = AnchorStyles.Left, AutoSize = true }, _numSentenceCount);
            AddSettingRow(layout, 9, _chkChineseWords, _chkEnglishWords);
            AddSettingRow(layout, 10, _chkChineseSentences, _chkEnglishSentences);
            AddSettingRow(layout, 11, new Label { Text = "中文最小长度", Anchor = AnchorStyles.Left, AutoSize = true }, _numMinChineseLength);
            AddSettingRow(layout, 12, new Label { Text = "英文最小长度", Anchor = AnchorStyles.Left, AutoSize = true }, _numMinEnglishLength);
            AddSettingRow(layout, 13, new Label { Text = "句子分隔符", Anchor = AnchorStyles.Left, AutoSize = true }, _txtSentenceDelimiters);
            AddSettingRow(layout, 14, _chkExcludeEmails, new Label());

            _chkUseFixedImageSeed.CheckedChanged += delegate
            {
                _numFixedImageSeed.Enabled = _chkUseFixedImageSeed.Checked;
            };

            group.Controls.Add(layout);
            return group;
        }

        private Control BuildRulesGridPanel()
        {
            ConfigureRuleGrid(_gridRules);
            var panel = new Panel
            {
                Dock = DockStyle.Fill,
                Padding = new Padding(8),
            };
            panel.Controls.Add(_gridRules);
            _gridRules.Dock = DockStyle.Fill;
            return panel;
        }

        private void BindData()
        {
            _gridReplace.DataSource = _replaceItems;
            _gridRestore.DataSource = _restoreItems;
            _gridRules.DataSource = _rules;
        }

        private void ApplyConfigToUi()
        {
            _txtReplaceSource.Text = _config.ReplacePage.SourceDirectory ?? string.Empty;
            _txtReplaceOutput.Text = _config.ReplacePage.OutputDirectory ?? string.Empty;
            _txtRuleFile.Text = _config.ReplacePage.RuleFilePath ?? string.Empty;
            _txtRestoreSource.Text = _config.RestorePage.ReplaceDirectory ?? string.Empty;
            _txtRestoreOutput.Text = _config.RestorePage.RestoreDirectory ?? string.Empty;
            _cmbRestoreDiffInput.SelectedItem = string.Equals(_config.RestorePage.DiffInputFormat, ".bmp", StringComparison.OrdinalIgnoreCase)
                ? ".bmp"
                : ".diff";

            var auto = _config.Settings.AutoExtract;
            _chkJsonDiffEncryption.Checked = _config.Settings.JsonDiffEncryption;
            _chkEnableImageReplacement.Checked = _config.Settings.EnableImageReplacement;
            _chkUseFixedImageSeed.Checked = _config.Settings.UseFixedImageSeed;
            _numFixedImageSeed.Value = Math.Max(_numFixedImageSeed.Minimum, Math.Min(_numFixedImageSeed.Maximum, _config.Settings.FixedImageSeed));
            _numFixedImageSeed.Enabled = _chkUseFixedImageSeed.Checked;
            _chkExtractKeywords.Checked = auto.ExtractKeywords;
            _chkExtractWords.Checked = auto.ExtractHighFrequencyWords;
            _chkExtractSentences.Checked = auto.ExtractHighFrequencySentences;
            _chkKeywordFrequency.Checked = auto.UseKeywordFrequency;
            _chkKeywordTfIdf.Checked = auto.UseKeywordTfIdf;
            _chkKeywordTextRank.Checked = auto.UseKeywordTextRank;
            _chkChineseWords.Checked = auto.CountChineseWords;
            _chkEnglishWords.Checked = auto.CountEnglishWords;
            _chkChineseSentences.Checked = auto.CountChineseSentences;
            _chkEnglishSentences.Checked = auto.CountEnglishSentences;
            _chkExcludeEmails.Checked = auto.ExcludeEmailAddresses;
            _numKeywordCount.Value = auto.MaxKeywordCount;
            _numWordCount.Value = auto.MaxWordCount;
            _numSentenceCount.Value = auto.MaxSentenceCount;
            _numMinChineseLength.Value = auto.MinChineseWordLength;
            _numMinEnglishLength.Value = auto.MinEnglishWordLength;
            _txtSentenceDelimiters.Text = auto.SentenceDelimiters ?? string.Empty;

            if (!string.IsNullOrWhiteSpace(_txtRuleFile.Text) && File.Exists(_txtRuleFile.Text))
            {
                LoadRuleFile(_txtRuleFile.Text);
            }
        }

        private void CaptureUiToConfig()
        {
            _config.ReplacePage.SourceDirectory = _txtReplaceSource.Text.Trim();
            _config.ReplacePage.OutputDirectory = _txtReplaceOutput.Text.Trim();
            _config.ReplacePage.RuleFilePath = _txtRuleFile.Text.Trim();
            _config.RestorePage.ReplaceDirectory = _txtRestoreSource.Text.Trim();
            _config.RestorePage.RestoreDirectory = _txtRestoreOutput.Text.Trim();
            _config.RestorePage.DiffInputFormat = GetSelectedRestoreDiffInputFormat();

            var auto = _config.Settings.AutoExtract;
            _config.Settings.JsonDiffEncryption = _chkJsonDiffEncryption.Checked;
            _config.Settings.EnableImageReplacement = _chkEnableImageReplacement.Checked;
            _config.Settings.UseFixedImageSeed = _chkUseFixedImageSeed.Checked;
            _config.Settings.FixedImageSeed = Decimal.ToInt32(_numFixedImageSeed.Value);
            auto.ExtractKeywords = _chkExtractKeywords.Checked;
            auto.ExtractHighFrequencyWords = _chkExtractWords.Checked;
            auto.ExtractHighFrequencySentences = _chkExtractSentences.Checked;
            auto.UseKeywordFrequency = _chkKeywordFrequency.Checked;
            auto.UseKeywordTfIdf = _chkKeywordTfIdf.Checked;
            auto.UseKeywordTextRank = _chkKeywordTextRank.Checked;
            auto.CountChineseWords = _chkChineseWords.Checked;
            auto.CountEnglishWords = _chkEnglishWords.Checked;
            auto.CountChineseSentences = _chkChineseSentences.Checked;
            auto.CountEnglishSentences = _chkEnglishSentences.Checked;
            auto.ExcludeEmailAddresses = _chkExcludeEmails.Checked;
            auto.MaxKeywordCount = Decimal.ToInt32(_numKeywordCount.Value);
            auto.MaxWordCount = Decimal.ToInt32(_numWordCount.Value);
            auto.MaxSentenceCount = Decimal.ToInt32(_numSentenceCount.Value);
            auto.MinChineseWordLength = Decimal.ToInt32(_numMinChineseLength.Value);
            auto.MinEnglishWordLength = Decimal.ToInt32(_numMinEnglishLength.Value);
            auto.SentenceDelimiters = _txtSentenceDelimiters.Text;
        }

        private async void MainForm_Shown(object sender, EventArgs e)
        {
            _logService.Info("APP_START", "程序启动。");
            if (_configurationLoadResult.IsCorrupted)
            {
                var message = "config.json 已损坏或无法解析，当前禁止执行替换、恢复和自动提取。是否重建默认配置？"
                    + Environment.NewLine
                    + _configurationLoadResult.ErrorMessage;
                var result = ShowMessage(message, "配置文件损坏", MessageBoxButtons.YesNo, MessageBoxIcon.Warning);
                if (result == DialogResult.Yes)
                {
                    _config = _configurationService.CreateDefault();
                    ApplyConfigToUi();
                    _configurationService.Save(_config);
                    _logService.Warning("CONFIG_RESET", "配置文件已重建为默认值。", _configurationLoadResult.ErrorMessage);
                }
                else
                {
                    _logService.Error("CONFIG_BLOCK", "配置文件损坏且用户拒绝重建默认配置。", _configurationLoadResult.ErrorMessage);
                    _skipConfigSaveOnClose = true;
                    Close();
                    return;
                }
            }
            else if (_configurationLoadResult.IsMissing)
            {
                _logService.Info("CONFIG_DEFAULT", "config.json 不存在，当前使用默认配置。");
            }

            await RefreshReplaceScanAsync();
            await RefreshRestoreScanAsync();
            UpdateActionStates();
        }

        private void MainForm_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (_isAutoExtractRunning || _isReplaceRunning || _isRestoreRunning)
            {
                e.Cancel = true;
                ShowMessage("当前仍有任务在执行，请先停止任务并等待当前文件处理完成。", "WORD 2007 格式调整软件", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }

            try
            {
                if (!_skipConfigSaveOnClose)
                {
                    CaptureUiToConfig();
                    _configurationService.Save(_config);
                }
            }
            catch (Exception ex)
            {
                ShowMessage("保存配置失败: " + ex.Message, "WORD 2007 格式调整软件", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }
        }

        private void LogService_EntryWritten(object sender, LogEntry entry)
        {
            if (InvokeRequired)
            {
                BeginInvoke(new Action<object, LogEntry>(LogService_EntryWritten), sender, entry);
                return;
            }

            var color = Color.Black;
            switch (entry.Level)
            {
                case LogLevel.Info:
                    color = Color.Green;
                    break;
                case LogLevel.Warning:
                    color = Color.DarkOrange;
                    break;
                case LogLevel.Error:
                    color = Color.Red;
                    break;
            }

            _logBox.SelectionStart = _logBox.TextLength;
            _logBox.SelectionColor = color;
            _logBox.AppendText(string.Format("{0:HH:mm:ss} [{1}] {2} {3}", entry.Timestamp, entry.Level.ToString().ToUpperInvariant(), entry.EventCode, entry.Message) + Environment.NewLine);
            if (!string.IsNullOrWhiteSpace(entry.Detail))
            {
                _logBox.SelectionColor = Color.Black;
                _logBox.AppendText(IndentBlock(entry.Detail) + Environment.NewLine);
            }

            _logBox.SelectionStart = _logBox.TextLength;
            _logBox.ScrollToCaret();
            FlushLogBox();
        }

        private void LogService_WriteFailed(object sender, LogWriteFailureEventArgs e)
        {
            if (InvokeRequired)
            {
                BeginInvoke(new Action<object, LogWriteFailureEventArgs>(LogService_WriteFailed), sender, e);
                return;
            }

            var detail = string.Format(
                "日志文件写入失败，当前日志路径: {0}{1}{2}",
                e.LogFilePath,
                Environment.NewLine,
                e.Exception.Message);

            _logBox.SelectionStart = _logBox.TextLength;
            _logBox.SelectionColor = Color.Red;
            _logBox.AppendText(string.Format("{0:HH:mm:ss} [ERROR] LOG_WRITE_FAIL 日志文件写入失败", DateTime.Now) + Environment.NewLine);
            _logBox.SelectionColor = Color.Black;
            _logBox.AppendText(IndentBlock(detail) + Environment.NewLine);
            _logBox.SelectionStart = _logBox.TextLength;
            _logBox.ScrollToCaret();
            FlushLogBox();

            if (_isAutoExtractRunning && _autoExtractCancellation != null && !_autoExtractCancellation.IsCancellationRequested)
            {
                _autoExtractCancellation.Cancel();
            }

            if (_isReplaceRunning && _replaceExecutionCancellation != null && !_replaceExecutionCancellation.IsCancellationRequested)
            {
                _replaceExecutionCancellation.Cancel();
            }

            if (_isRestoreRunning && _restoreExecutionCancellation != null && !_restoreExecutionCancellation.IsCancellationRequested)
            {
                _restoreExecutionCancellation.Cancel();
            }

            ShowMessage(
                "日志文件当前无法继续写入。当前正在处理的文件会在可控状态结束后停止，后续文件不会继续处理。"
                + Environment.NewLine
                + detail,
                "日志异常",
                MessageBoxButtons.OK,
                MessageBoxIcon.Warning);
        }

        private void FlushLogBox()
        {
            FlushControl(_logBox, forceRefresh: false);
        }

        private string GetAllLogText()
        {
            return _logBox.Text;
        }

        private static string IndentBlock(string value)
        {
            if (string.IsNullOrWhiteSpace(value))
            {
                return string.Empty;
            }

            var normalized = value.Replace("\r\n", "\n").Replace('\r', '\n');
            return "    " + normalized.Replace("\n", Environment.NewLine + "    ");
        }

        private string BuildReplaceScanStartDetail(string sourceDirectory, string configuredOutputDirectory, string effectiveOutputDirectory)
        {
            var builder = new StringBuilder();
            AppendKeyValue(builder, "原始文件夹", sourceDirectory);
            AppendKeyValue(builder, "替换文件夹(输入)", configuredOutputDirectory);
            AppendKeyValue(builder, "替换文件夹(生效)", effectiveOutputDirectory);
            return builder.ToString().TrimEnd();
        }

        private string BuildReplaceScanDoneDetail(IList<FileScanItem> items)
        {
            var builder = new StringBuilder();
            AppendKeyValue(builder, "候选数量", (items == null ? 0 : items.Count).ToString());
            AppendScanItems(builder, items);
            return builder.ToString().TrimEnd();
        }

        private string BuildRestoreScanStartDetail(string replaceDirectory, string configuredOutputDirectory, string effectiveOutputDirectory, string diffInputFormat)
        {
            var builder = new StringBuilder();
            AppendKeyValue(builder, "替换文件夹", replaceDirectory);
            AppendKeyValue(builder, "恢复文件夹(输入)", configuredOutputDirectory);
            AppendKeyValue(builder, "恢复文件夹(生效)", effectiveOutputDirectory);
            AppendKeyValue(builder, "差异文件格式", diffInputFormat);
            return builder.ToString().TrimEnd();
        }

        private string BuildRestoreScanDoneDetail(IList<FileScanItem> items, string diffInputFormat)
        {
            var builder = new StringBuilder();
            AppendKeyValue(builder, "候选数量", (items == null ? 0 : items.Count).ToString());
            AppendKeyValue(builder, "差异文件格式", diffInputFormat);
            AppendScanItems(builder, items);
            return builder.ToString().TrimEnd();
        }

        private string BuildReplaceBatchPlanDetail(IList<FileScanItem> selectedItems, BatchExecutionPlan plan, RuleFile executionRuleFile, bool encryptDiff, int? fixedImageSeed)
        {
            var builder = new StringBuilder();
            AppendKeyValue(builder, "原始文件夹", _txtReplaceSource.Text.Trim());
            AppendKeyValue(builder, "替换文件夹", _txtReplaceOutput.Text.Trim());
            AppendKeyValue(builder, "规则文件", _txtRuleFile.Text.Trim());
            AppendKeyValue(builder, "差异 JSON 加密", encryptDiff ? "是" : "否");
            AppendKeyValue(builder, "图片替换", _chkEnableImageReplacement.Checked ? "启用" : "禁用");
            AppendKeyValue(builder, "固定图片种子", fixedImageSeed.HasValue ? fixedImageSeed.Value.ToString() : "否");
            AppendKeyValue(builder, "规则总数", executionRuleFile == null || executionRuleFile.Rules == null ? "0" : executionRuleFile.Rules.Count.ToString());
            AppendKeyValue(builder, "勾选文件数", selectedItems == null ? "0" : selectedItems.Count.ToString());
            AppendKeyValue(builder, "实际执行数", plan == null ? "0" : plan.ExecutionItems.Count.ToString());
            AppendKeyValue(builder, "预跳过数", plan == null ? "0" : plan.SkippedItems.Count.ToString());
            AppendKeyValue(builder, "并发度", plan == null ? "0" : plan.DegreeOfParallelism.ToString());
            if (plan != null && plan.SkippedItems.Count > 0)
            {
                builder.AppendLine("预跳过项目:");
                foreach (var skipped in plan.SkippedItems)
                {
                    builder.AppendLine("- " + NormalizeDetailValue(skipped.Item == null ? string.Empty : skipped.Item.SourcePath));
                    AppendKeyValue(builder, "  原因", skipped.Message);
                    AppendKeyValue(builder, "  冲突路径", skipped.ConflictingPath);
                }
            }

            builder.AppendLine("执行项目:");
            AppendScanItems(builder, plan == null ? null : plan.ExecutionItems.ToList());
            return builder.ToString().TrimEnd();
        }

        private string BuildRestoreBatchPlanDetail(IList<FileScanItem> selectedItems, BatchExecutionPlan plan)
        {
            var builder = new StringBuilder();
            AppendKeyValue(builder, "替换文件夹", _txtRestoreSource.Text.Trim());
            AppendKeyValue(builder, "恢复文件夹", _txtRestoreOutput.Text.Trim());
            AppendKeyValue(builder, "差异文件格式", GetSelectedRestoreDiffInputFormat());
            AppendKeyValue(builder, "规则文件", _txtRuleFile.Text.Trim());
            AppendKeyValue(builder, "勾选文件数", selectedItems == null ? "0" : selectedItems.Count.ToString());
            AppendKeyValue(builder, "实际执行数", plan == null ? "0" : plan.ExecutionItems.Count.ToString());
            AppendKeyValue(builder, "预跳过数", plan == null ? "0" : plan.SkippedItems.Count.ToString());
            AppendKeyValue(builder, "并发度", plan == null ? "0" : plan.DegreeOfParallelism.ToString());
            if (plan != null && plan.SkippedItems.Count > 0)
            {
                builder.AppendLine("预跳过项目:");
                foreach (var skipped in plan.SkippedItems)
                {
                    builder.AppendLine("- " + NormalizeDetailValue(skipped.Item == null ? string.Empty : skipped.Item.SourcePath));
                    AppendKeyValue(builder, "  原因", skipped.Message);
                    AppendKeyValue(builder, "  冲突路径", skipped.ConflictingPath);
                }
            }

            builder.AppendLine("执行项目:");
            AppendScanItems(builder, plan == null ? null : plan.ExecutionItems.ToList());
            return builder.ToString().TrimEnd();
        }

        private string BuildReplaceFileStartDetail(FileScanItem item, int displayIndex, int totalCount)
        {
            return BuildFileExecutionDetail("替换", item, displayIndex, totalCount, includeResultFiles: false, textOperationCount: null, imageOperationCount: null, bmpPath: null, exception: null);
        }

        private string BuildReplaceFileDoneDetail(FileScanItem item, FileProcessResult result, int displayIndex, int totalCount)
        {
            return BuildFileExecutionDetail(
                "替换",
                item,
                displayIndex,
                totalCount,
                includeResultFiles: true,
                textOperationCount: result == null ? null : (int?)result.TextOperationCount,
                imageOperationCount: result == null ? null : (int?)result.ImageOperationCount,
                bmpPath: result == null ? null : result.BmpPath,
                exception: null);
        }

        private string BuildReplaceFileFailDetail(FileScanItem item, Exception exception, int displayIndex, int totalCount)
        {
            return BuildFileExecutionDetail("替换", item, displayIndex, totalCount, includeResultFiles: true, textOperationCount: null, imageOperationCount: null, bmpPath: null, exception: exception);
        }

        private string BuildRestoreFileStartDetail(FileScanItem item, int displayIndex, int totalCount)
        {
            return BuildFileExecutionDetail("恢复", item, displayIndex, totalCount, includeResultFiles: false, textOperationCount: null, imageOperationCount: null, bmpPath: null, exception: null);
        }

        private string BuildRestoreFileDoneDetail(FileScanItem item, FileProcessResult result, int displayIndex, int totalCount)
        {
            return BuildFileExecutionDetail(
                "恢复",
                item,
                displayIndex,
                totalCount,
                includeResultFiles: true,
                textOperationCount: result == null ? null : (int?)result.TextOperationCount,
                imageOperationCount: result == null ? null : (int?)result.ImageOperationCount,
                bmpPath: result == null ? null : result.BmpPath,
                exception: null);
        }

        private string BuildRestoreFileFailDetail(FileScanItem item, Exception exception, int displayIndex, int totalCount)
        {
            return BuildFileExecutionDetail("恢复", item, displayIndex, totalCount, includeResultFiles: true, textOperationCount: null, imageOperationCount: null, bmpPath: null, exception: exception);
        }

        private string BuildFileExecutionDetail(
            string operationName,
            FileScanItem item,
            int displayIndex,
            int totalCount,
            bool includeResultFiles,
            int? textOperationCount,
            int? imageOperationCount,
            string bmpPath,
            Exception exception)
        {
            var builder = new StringBuilder();
            AppendKeyValue(builder, "操作", operationName);
            AppendKeyValue(builder, "序号", string.Format("{0}/{1}", displayIndex, totalCount));
            AppendFileSnapshot(builder, "源文件", item == null ? null : item.SourcePath);
            AppendKeyValue(builder, "目标输出", item == null ? null : item.OutputPath);
            AppendKeyValue(builder, "差异文件", item == null ? null : item.DiffPath);
            if (includeResultFiles)
            {
                AppendFileSnapshot(builder, "目标输出", item == null ? null : item.OutputPath);
                AppendFileSnapshot(builder, "差异文件", item == null ? null : item.DiffPath);
                AppendFileSnapshot(builder, "BMP 差异文件", bmpPath);
            }

            if (textOperationCount.HasValue)
            {
                AppendKeyValue(builder, "文本命中/恢复数", textOperationCount.Value.ToString());
            }

            if (imageOperationCount.HasValue)
            {
                AppendKeyValue(builder, "图片命中/恢复数", imageOperationCount.Value.ToString());
            }

            AppendExceptionDetail(builder, exception);
            return builder.ToString().TrimEnd();
        }

        private static void AppendScanItems(StringBuilder builder, IList<FileScanItem> items)
        {
            if (builder == null)
            {
                return;
            }

            if (items == null || items.Count == 0)
            {
                builder.AppendLine("候选项: <empty>");
                return;
            }

            var maxCount = Math.Min(items.Count, 20);
            for (var index = 0; index < maxCount; index++)
            {
                var item = items[index];
                builder.AppendLine(string.Format("[{0}]", index + 1));
                AppendFileSnapshot(builder, "  源文件", item == null ? null : item.SourcePath);
                AppendKeyValue(builder, "  目标输出", item == null ? null : item.OutputPath);
                AppendKeyValue(builder, "  差异文件", item == null ? null : item.DiffPath);
                AppendKeyValue(builder, "  勾选", item != null && item.IsSelected ? "是" : "否");
                AppendKeyValue(builder, "  状态", item == null ? null : item.Status.ToString());
            }

            if (items.Count > maxCount)
            {
                builder.AppendLine(string.Format("... 其余 {0} 项省略", items.Count - maxCount));
            }
        }

        private static void AppendFileSnapshot(StringBuilder builder, string label, string path)
        {
            if (builder == null)
            {
                return;
            }

            AppendKeyValue(builder, label + "路径", path);
            if (string.IsNullOrWhiteSpace(path))
            {
                return;
            }

            try
            {
                if (!File.Exists(path))
                {
                    AppendKeyValue(builder, label + "存在", "否");
                    return;
                }

                var info = new FileInfo(path);
                AppendKeyValue(builder, label + "存在", "是");
                AppendKeyValue(builder, label + "大小(bytes)", info.Length.ToString());
                AppendKeyValue(builder, label + "属性", info.Attributes.ToString());
                AppendKeyValue(builder, label + "只读", info.IsReadOnly ? "是" : "否");
                AppendKeyValue(builder, label + "最后写入时间", info.LastWriteTime.ToString("yyyy-MM-dd HH:mm:ss.fff"));
                AppendKeyValue(builder, label + "最后写入时间(UTC)", info.LastWriteTimeUtc.ToString("yyyy-MM-dd HH:mm:ss.fff"));
                AppendKeyValue(builder, label + "SHA256", SafeComputeFileFingerprint(path));
            }
            catch (Exception ex)
            {
                AppendKeyValue(builder, label + "快照错误", ex.GetType().Name + ": " + ex.Message);
            }
        }

        private static void AppendExceptionDetail(StringBuilder builder, Exception exception)
        {
            if (builder == null || exception == null)
            {
                return;
            }

            AppendKeyValue(builder, "异常类型", exception.GetType().FullName);
            AppendKeyValue(builder, "异常消息", exception.Message);
            if (exception.InnerException != null)
            {
                AppendKeyValue(builder, "内部异常", exception.InnerException.GetType().FullName + ": " + exception.InnerException.Message);
            }

            AppendKeyValue(builder, "异常堆栈", exception.ToString());
        }

        private static void AppendKeyValue(StringBuilder builder, string key, string value)
        {
            if (builder == null)
            {
                return;
            }

            builder.Append(key ?? string.Empty);
            builder.Append(": ");
            builder.AppendLine(NormalizeDetailValue(value));
        }

        private static string SafeComputeFileFingerprint(string path)
        {
            if (string.IsNullOrWhiteSpace(path))
            {
                return "<empty>";
            }

            try
            {
                return HashUtility.ComputeFileSha256Base64(path);
            }
            catch (Exception ex)
            {
                return "<unavailable: " + ex.GetType().Name + ": " + ex.Message + ">";
            }
        }

        private static string NormalizeDetailValue(string value)
        {
            return string.IsNullOrWhiteSpace(value) ? "<empty>" : value;
        }

        private void CopyAllLogs()
        {
            var text = GetAllLogText();
            if (string.IsNullOrEmpty(text))
            {
                return;
            }

            try
            {
                Clipboard.SetText(text);
            }
            catch
            {
            }
        }

        private void ClearLogBox()
        {
            _logBox.Clear();
        }

        private async Task RefreshScanOnTabSwitchAsync()
        {
            try
            {
                if (_tabControl.SelectedTab == _replaceTab)
                {
                    await RefreshReplaceScanAsync();
                }
                else if (_tabControl.SelectedTab == _restoreTab)
                {
                    await RefreshRestoreScanAsync();
                }
            }
            catch (OperationCanceledException)
            {
            }
        }

        private async Task RefreshReplaceScanAsync()
        {
            _replaceScanCancellation?.Cancel();
            _replaceScanCancellation = new CancellationTokenSource();
            var token = _replaceScanCancellation.Token;

            try
            {
                var source = _txtReplaceSource.Text.Trim();
                if (string.IsNullOrWhiteSpace(source) || !Directory.Exists(source))
                {
                    _replaceItems.Clear();
                    _lblReplaceRuntime.Text = "当前文件 0/0 | 当前规则 - | 当前文件命中 0 | 累计命中 0";
                    FlushReplaceRuntimeUi(forceRefresh: true);
                    UpdateActionStates();
                    return;
                }

                var output = GetReplacePreviewOutputDirectory(source);
                if (!string.IsNullOrWhiteSpace(_txtReplaceOutput.Text.Trim()) && string.IsNullOrWhiteSpace(output))
                {
                    foreach (var message in _fileScanService.ValidateReplaceDirectories(source, _txtReplaceOutput.Text.Trim()))
                    {
                        _logService.Error("SCAN_BLOCK", message);
                    }
                }

                _logService.Info("SCAN_START", "开始扫描替换候选文件。", BuildReplaceScanStartDetail(source, _txtReplaceOutput.Text.Trim(), output));
                var ruleFile = CreateExecutionRuleFile();
                var items = await Task.Run(() => _fileScanService.ScanReplaceCandidates(source, output, ruleFile), token);
                if (token.IsCancellationRequested)
                {
                    return;
                }

                ReplaceBinding(_replaceItems, items);
                _lblReplaceRuntime.Text = string.Format(
                    "当前文件 0/{0} | 当前规则 - | 当前文件命中 0 | 累计命中 0",
                    items.Count);
                FlushReplaceRuntimeUi(forceRefresh: true);
                _logService.Info("SCAN_DONE", string.Format("替换候选文件扫描完成，共 {0} 项。", items.Count), BuildReplaceScanDoneDetail(items));
                UpdateActionStates();
            }
            catch (OperationCanceledException)
            {
            }
            catch (Exception ex)
            {
                _logService.Error("SCAN_FAIL", "替换候选文件扫描失败。", ex.Message);
            }
        }

        private async Task RefreshRestoreScanAsync()
        {
            _restoreScanCancellation?.Cancel();
            _restoreScanCancellation = new CancellationTokenSource();
            var token = _restoreScanCancellation.Token;

            try
            {
                var source = _txtRestoreSource.Text.Trim();
                if (string.IsNullOrWhiteSpace(source) || !Directory.Exists(source))
                {
                    _restoreItems.Clear();
                    _lblRestoreRuntime.Text = "当前文件 0/0 | 当前规则 - | 当前文件命中 0 | 累计命中 0";
                    FlushRestoreRuntimeUi(forceRefresh: true);
                    UpdateActionStates();
                    return;
                }

                var output = GetRestorePreviewOutputDirectory(source);
                var diffInputFormat = GetSelectedRestoreDiffInputFormat();
                if (!string.IsNullOrWhiteSpace(_txtRestoreOutput.Text.Trim()) && string.IsNullOrWhiteSpace(output))
                {
                    foreach (var message in _fileScanService.ValidateRestoreDirectories(source, _txtRestoreOutput.Text.Trim()))
                    {
                        _logService.Error("RESTORE_SCAN_BLOCK", message);
                    }
                }

                _logService.Info("RESTORE_SCAN_START", "开始扫描恢复候选文件。", BuildRestoreScanStartDetail(source, _txtRestoreOutput.Text.Trim(), output, diffInputFormat));
                var items = await Task.Run(() => _fileScanService.ScanRestoreCandidates(source, output, diffInputFormat), token);
                if (token.IsCancellationRequested)
                {
                    return;
                }

                ReplaceBinding(_restoreItems, items);
                _lblRestoreRuntime.Text = string.Format(
                    "当前文件 0/{0} | 当前规则 - | 当前文件命中 0 | 累计命中 0",
                    items.Count);
                FlushRestoreRuntimeUi(forceRefresh: true);
                _logService.Info("RESTORE_SCAN_DONE", string.Format("恢复候选文件扫描完成，共 {0} 项。", items.Count), BuildRestoreScanDoneDetail(items, diffInputFormat));
                UpdateActionStates();
            }
            catch (OperationCanceledException)
            {
            }
            catch (Exception ex)
            {
                _logService.Error("RESTORE_SCAN_FAIL", "恢复候选文件扫描失败。", ex.Message);
            }
        }

        private async Task RunAutoExtractAsync()
        {
            var selectedFiles = _replaceItems.Where(item => item.IsSelected).Select(item => item.SourcePath).ToList();
            if (selectedFiles.Count == 0)
            {
                ShowMessage("未勾选任何文件，无法执行自动提取。", "自动提取", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }

            CaptureUiToConfig();
            _autoExtractCancellation = new CancellationTokenSource();
            _isAutoExtractRunning = true;
            SetRuleEditingEnabled(false);
            _btnStopReplace.Enabled = true;
            UpdateActionStates();
            _replaceTotalProgress.Maximum = Math.Max(selectedFiles.Count, 1);
            _replaceTotalProgress.Value = 0;
            _replaceFileProgress.Value = 0;

            _logService.Info("EXTRACT_START", string.Format("开始自动提取，勾选文件数={0}。", selectedFiles.Count));
            try
            {
                var progress = new Progress<ExtractionProgress>(value =>
                {
                    _replaceTotalProgress.Maximum = Math.Max(value.Total, 1);
                    _replaceTotalProgress.Value = Math.Min(value.Current, _replaceTotalProgress.Maximum);
                    _replaceFileProgress.Style = ProgressBarStyle.Marquee;
                    _lblReplaceRuntime.Text = value.Message;
                });

                var result = await _autoExtractService.ExtractAsync(
                    selectedFiles,
                    _config.Settings.AutoExtract,
                    _rules.ToList(),
                    progress,
                    _autoExtractCancellation.Token);

                _replaceFileProgress.Style = ProgressBarStyle.Blocks;
                _replaceFileProgress.Value = 100;
                foreach (var warning in result.Warnings)
                {
                    _logService.Warning("EXTRACT_SKIP", warning);
                }

                if (result.Candidates.Count == 0)
                {
                    ShowMessage("未提取到可用项。", "自动提取", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    _logService.Info("EXTRACT_DONE", "自动提取完成，但未提取到可用项。");
                    return;
                }

                var preview = _dialogService.ShowAutoExtractPreview(this, result.Candidates);
                if (preview.DialogResult != DialogResult.OK)
                {
                    _logService.Info("EXTRACT_DONE", "自动提取预览已取消，未追加规则。");
                    return;
                }

                var selectedCandidates = preview.SelectedCandidates ?? Array.Empty<ExtractionCandidate>();
                AppendAutoExtractRules(selectedCandidates);
                var skippedCount = result.Candidates.Count - selectedCandidates.Count;
                var summary = string.Format("自动提取完成。提取={0}，追加={1}，跳过={2}。", result.Candidates.Count, selectedCandidates.Count, skippedCount);
                ShowMessage(summary, "自动提取", MessageBoxButtons.OK, MessageBoxIcon.Information);
                _logService.Info("EXTRACT_DONE", summary);
            }
            catch (OperationCanceledException)
            {
                _logService.Warning("EXTRACT_CANCEL", "自动提取已停止。");
            }
            catch (Exception ex)
            {
                _logService.Error("EXTRACT_FAIL", "自动提取失败。", ex.ToString());
                ShowMessage("自动提取失败: " + ex.Message, "自动提取", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            finally
            {
                _isAutoExtractRunning = false;
                SetRuleEditingEnabled(true);
                _btnStopReplace.Enabled = false;
                _replaceFileProgress.Style = ProgressBarStyle.Blocks;
                UpdateActionStates();
            }
        }

        private void AppendAutoExtractRules(IList<ExtractionCandidate> candidates)
        {
            if (candidates.Count == 0)
            {
                return;
            }

            var newRuleIds = new List<string>();
            foreach (var candidate in candidates)
            {
                var rule = _ruleService.CreateAutoExtractRule(candidate, _rules.ToList());
                _rules.Add(rule);
                newRuleIds.Add(rule.Id);
            }

            _lastAutoExtractRuleIds = newRuleIds;
            _btnUndoAutoExtract.Enabled = true;

            var report = _ruleService.Validate(new RuleFile { Rules = _rules.ToList() });
            if (report.Issues.Count > 0)
            {
                var text = string.Join(Environment.NewLine, report.Issues.Select(_ruleService.FormatIssue));
                ShowMessage(text, "规则检查", MessageBoxButtons.OK, report.HasErrors ? MessageBoxIcon.Warning : MessageBoxIcon.Information);
                foreach (var issue in report.Issues)
                {
                    LogRuleIssue(issue);
                }
            }

            _tabControl.SelectedTab = _settingsTab;
            if (_rules.Count > 0)
            {
                var firstIndex = _rules.ToList().FindIndex(rule => newRuleIds.Contains(rule.Id));
                if (firstIndex >= 0)
                {
                    _gridRules.ClearSelection();
                    if (_gridRules.Rows[firstIndex].Cells.Count > 0)
                    {
                        _gridRules.CurrentCell = _gridRules.Rows[firstIndex].Cells[0];
                    }

                    _gridRules.Rows[firstIndex].Selected = true;
                    try
                    {
                        _gridRules.FirstDisplayedScrollingRowIndex = firstIndex;
                    }
                    catch (InvalidOperationException)
                    {
                    }
                }
            }
        }

        private void OpenRules_Click(object sender, EventArgs e)
        {
            using (var dialog = new OpenFileDialog())
            {
                dialog.Filter = "规则文件 (*.rule)|*.rule|所有文件 (*.*)|*.*";
                if (dialog.ShowDialog(this) != DialogResult.OK)
                {
                    return;
                }

                LoadRuleFile(dialog.FileName);
                _txtRuleFile.Text = dialog.FileName;
            }
        }

        private void SaveRules_Click(object sender, EventArgs e)
        {
            try
            {
                var path = _txtRuleFile.Text.Trim();
                if (string.IsNullOrWhiteSpace(path))
                {
                    using (var dialog = new SaveFileDialog())
                    {
                        dialog.Filter = "规则文件 (*.rule)|*.rule";
                        dialog.DefaultExt = "rule";
                        if (dialog.ShowDialog(this) != DialogResult.OK)
                        {
                            return;
                        }

                        path = dialog.FileName;
                        _txtRuleFile.Text = path;
                    }
                }

                _ruleFile.Rules = _rules.ToList();
                var report = _ruleService.Validate(_ruleFile);
                foreach (var issue in report.Issues)
                {
                    LogRuleIssue(issue);
                }

                if (report.Issues.Count > 0)
                {
                    var summary = string.Join(Environment.NewLine, report.Issues.Select(_ruleService.FormatIssue));
                    ShowMessage(summary, "规则检查", MessageBoxButtons.OK, report.HasErrors ? MessageBoxIcon.Warning : MessageBoxIcon.Information);
                    if (report.HasErrors)
                    {
                        return;
                    }
                }

                _ruleService.Save(path, _ruleFile);
                _logService.Info("RULE_SAVE", "规则文件已保存。", path);
            }
            catch (Exception ex)
            {
                _logService.Error("RULE_SAVE_FAIL", "保存规则文件失败。", ex.Message);
                ShowMessage("保存规则文件失败: " + ex.Message, "规则文件", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private void UndoAutoExtract_Click(object sender, EventArgs e)
        {
            if (_lastAutoExtractRuleIds.Count == 0)
            {
                return;
            }

            for (var index = _rules.Count - 1; index >= 0; index--)
            {
                if (_lastAutoExtractRuleIds.Contains(_rules[index].Id))
                {
                    _rules.RemoveAt(index);
                }
            }

            _logService.Info("EXTRACT_UNDO", string.Format("已撤销最近一次自动提取追加的 {0} 条规则。", _lastAutoExtractRuleIds.Count));
            _lastAutoExtractRuleIds.Clear();
            _btnUndoAutoExtract.Enabled = false;
        }

        private void AddRule_Click(object sender, EventArgs e)
        {
            var nextIndex = _rules.Count + 1;
            _rules.Add(new RuleDefinition
            {
                Id = "MR" + nextIndex.ToString("0000"),
                Name = "MANUAL-" + nextIndex.ToString("0000"),
                IsEnabled = true,
                MatchMode = RuleMatchMode.PlainText,
                Target = RuleTarget.DocumentContent,
                Note = string.Empty,
            });
        }

        private void DeleteRule_Click(object sender, EventArgs e)
        {
            DeleteSelectedRules();
        }

        private void MoveRuleUp_Click(object sender, EventArgs e)
        {
            MoveCurrentRule(-1);
        }

        private void MoveRuleDown_Click(object sender, EventArgs e)
        {
            MoveCurrentRule(1);
        }

        private void MoveCurrentRule(int delta)
        {
            if (_gridRules.CurrentRow == null)
            {
                return;
            }

            var currentIndex = _gridRules.CurrentRow.Index;
            var nextIndex = currentIndex + delta;
            if (currentIndex < 0 || nextIndex < 0 || nextIndex >= _rules.Count)
            {
                return;
            }

            var item = _rules[currentIndex];
            _rules.RemoveAt(currentIndex);
            _rules.Insert(nextIndex, item);
            _gridRules.ClearSelection();
            _gridRules.Rows[nextIndex].Selected = true;
        }

        private async void StartReplaceExecution_Click(object sender, EventArgs e)
        {
            if (_isReplaceRunning || _isRestoreRunning)
            {
                return;
            }

            if (!TryPersistConfigFromUi())
            {
                return;
            }

            var selectedItems = _replaceItems.Where(item => item.IsSelected).ToList();
            if (selectedItems.Count == 0)
            {
                ShowMessage("未勾选任何替换文件。", "开始替换", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }

            var validationMessages = GetReplaceExecutionValidationMessages();
            if (validationMessages.Count > 0)
            {
                foreach (var message in validationMessages)
                {
                    _logService.Error("REPLACE_BLOCK", message);
                }

                ShowMessage(string.Join(Environment.NewLine, validationMessages), "开始替换", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                return;
            }

            RuleFile executionRuleFile;
            if (!PrepareRuleExecutionWithBlockingErrors(out executionRuleFile))
            {
                return;
            }

            var emptyReplacementRules = _rules.Where(rule => rule.IsEnabled && string.IsNullOrEmpty(rule.ReplacementText)).ToList();
            if (emptyReplacementRules.Count > 0)
            {
                var warning = string.Format("当前存在 {0} 条启用规则的替换文本为空，执行后会删除命中的原始内容。是否继续？", emptyReplacementRules.Count);
                if (ShowMessage(warning, "强提示", MessageBoxButtons.YesNo, MessageBoxIcon.Warning) != DialogResult.Yes)
                {
                    return;
                }
            }

            await ExecuteReplaceBatchAsync(selectedItems, executionRuleFile);
        }

        private async void StartRestoreExecution_Click(object sender, EventArgs e)
        {
            if (_isReplaceRunning || _isRestoreRunning)
            {
                return;
            }

            if (!TryPersistConfigFromUi())
            {
                return;
            }

            var selectedItems = _restoreItems.Where(item => item.IsSelected).ToList();
            if (selectedItems.Count == 0)
            {
                ShowMessage("未勾选任何恢复文件。", "开始恢复", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }

            var validationMessages = GetRestoreExecutionValidationMessages();
            if (validationMessages.Count > 0)
            {
                foreach (var message in validationMessages)
                {
                    _logService.Error("RESTORE_BLOCK", message);
                }

                ShowMessage(string.Join(Environment.NewLine, validationMessages), "开始恢复", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                return;
            }

            await ExecuteRestoreBatchAsync(selectedItems);
        }

        private void StopReplaceOrAutoExtract_Click(object sender, EventArgs e)
        {
            if (_isAutoExtractRunning)
            {
                _autoExtractCancellation?.Cancel();
                return;
            }

            if (_isReplaceRunning && _replaceExecutionCancellation != null && !_replaceExecutionCancellation.IsCancellationRequested)
            {
                _replaceExecutionCancellation.Cancel();
                _logService.Warning("REPLACE_STOP", "已请求停止替换任务，当前文件完成后停止。");
            }
        }

        private void StopRestore_Click(object sender, EventArgs e)
        {
            if (_isRestoreRunning && _restoreExecutionCancellation != null && !_restoreExecutionCancellation.IsCancellationRequested)
            {
                _restoreExecutionCancellation.Cancel();
                _logService.Warning("RESTORE_STOP", "已请求停止恢复任务，当前文件完成后停止。");
            }
        }

        private async Task ExecuteReplaceBatchAsync(IList<FileScanItem> selectedItems, RuleFile executionRuleFile)
        {
            _replaceExecutionCancellation?.Dispose();
            _replaceExecutionCancellation = new CancellationTokenSource();
            _isReplaceRunning = true;
            SetRuleEditingEnabled(false);
            var encryptDiff = _chkJsonDiffEncryption.Checked;
            var fixedImageSeed = _chkUseFixedImageSeed.Checked ? Decimal.ToInt32(_numFixedImageSeed.Value) : (int?)null;

            foreach (var item in selectedItems)
            {
                item.Status = ProcessingStatus.Pending;
                item.TextOperationCount = 0;
                item.ImageOperationCount = 0;
            }

            ResetReplaceProgress(selectedItems.Count);
            UpdateActionStates();

            var plan = _batchExecutionPlanner.CreatePlan(selectedItems, Environment.ProcessorCount);
            var executionItems = plan.ExecutionItems.ToList();
            var displayOrder = executionItems
                .Select((item, index) => new { item, index = index + 1 })
                .ToDictionary(entry => entry.item, entry => entry.index);
            var successCount = 0;
            var failedCount = 0;
            var stoppedCount = 0;
            var totalHits = 0;
            var completedCount = 0;
            var nextExecutionIndex = -1;

            foreach (var skipped in plan.SkippedItems)
            {
                skipped.Item.Status = ProcessingStatus.Failed;
                RefreshReplaceItemRow(skipped.Item, forceRefresh: true);
                failedCount++;
                completedCount++;
                _replaceTotalProgress.Value = Math.Min(completedCount, _replaceTotalProgress.Maximum);
                FlushReplaceRuntimeUi(forceRefresh: true);
                _logService.Warning(
                    "REPLACE_BATCH_SKIP",
                    skipped.Message,
                    string.Format("源文件: {0}{1}冲突路径: {2}", skipped.Item.SourcePath, Environment.NewLine, skipped.ConflictingPath));
            }

            try
            {
                _logService.Info(
                    "REPLACE_BATCH_PLAN",
                    string.Format(
                        "替换批处理开始。勾选={0}，执行={1}，预跳过={2}，并发度={3}{4}。",
                        selectedItems.Count,
                        executionItems.Count,
                        plan.SkippedItems.Count,
                        plan.DegreeOfParallelism,
                        plan.RequiresSerialExecution ? "（包含 .doc，已退回串行）" : string.Empty),
                    BuildReplaceBatchPlanDetail(selectedItems, plan, executionRuleFile, encryptDiff, fixedImageSeed));

                async Task RunWorkerAsync()
                {
                    while (true)
                    {
                        if (_replaceExecutionCancellation.IsCancellationRequested)
                        {
                            return;
                        }

                        var executionIndex = Interlocked.Increment(ref nextExecutionIndex);
                        if (executionIndex >= executionItems.Count)
                        {
                            return;
                        }

                        var item = executionItems[executionIndex];
                        var displayIndex = displayOrder[item];
                        item.Status = ProcessingStatus.InProgress;
                        RefreshReplaceItemRow(item, forceRefresh: true);
                        UpdateReplaceStatus(displayIndex, selectedItems.Count, "-", 0, totalHits, 0, forceRefresh: true);

                        _logService.Info("DEBUG_RULES", "执行规则列表。",
                            string.Format("总规则数={0}; 规则详情=[{1}]",
                                executionRuleFile.Rules.Count,
                                string.Join("; ", executionRuleFile.Rules.Select(r =>
                                    string.Format("Id={0}, Name={1}, Enabled={2}, Target={3}, SearchText='{4}', ReplacementText='{5}'",
                                        r.Id, r.Name, r.IsEnabled, r.Target, r.SearchText, r.ReplacementText)))));

                        var fileNameRules = executionRuleFile.Rules
                            .Where(r => r != null && r.IsEnabled && !string.IsNullOrEmpty(r.SearchText) && r.Target == RuleTarget.FileName)
                            .ToList();
                        if (fileNameRules.Count > 0)
                        {
                            var sourceFileName = Path.GetFileNameWithoutExtension(item.SourcePath);
                            var extension = Path.GetExtension(item.SourcePath);
                            _logService.Info("FILENAME_RULES", "应用文件名替换规则。",
                                string.Format("源文件名={0}; 规则数={1}; 规则详情=[{2}]",
                                    sourceFileName,
                                    fileNameRules.Count,
                                    string.Join("; ", fileNameRules.Select(r =>
                                        string.Format("Id={0}, SearchText='{1}', ReplacementText='{2}', MatchMode={3}, CaseSensitive={4}, WholeWord={5}",
                                            r.Id, r.SearchText, r.ReplacementText, r.MatchMode, r.IsCaseSensitive, r.IsWholeWord)))));
                            var replacedName = FileScanService.ApplyRulesToFileName(sourceFileName, fileNameRules);
                            _logService.Info("FILENAME_REPLACED", "文件名替换结果。",
                                string.Format("原文件名={0}; 替换后={1}", sourceFileName, replacedName));
                            var outputDir = Path.GetDirectoryName(item.OutputPath) ?? string.Empty;
                            var diffDir = Path.GetDirectoryName(item.DiffPath) ?? string.Empty;
                            var datedSuffix = "-" + DateTime.Today.ToString("yyyyMMdd");
                            item.OutputPath = Path.Combine(outputDir, replacedName + datedSuffix + extension);
                            item.DiffPath = Path.Combine(diffDir, replacedName + datedSuffix + ".diff");
                        }

                        var startDetail = await Task.Run(() => BuildReplaceFileStartDetail(item, displayIndex, selectedItems.Count));
                        _logService.Info("REPLACE_FILE_START", "开始处理替换文件。", startDetail);

                        try
                        {
                            var progressThrottle = new RuntimeProgressThrottle();
                            var progress = new Progress<FileProcessProgress>(value =>
                            {
                                LogProcessProgressWarning("REPLACE_PROGRESS_WARN", value);
                                var forceRefresh = value.FilePercent >= 100;
                                if (!progressThrottle.ShouldApply(forceRefresh))
                                {
                                    return;
                                }

                                UpdateReplaceStatus(
                                    displayIndex,
                                    selectedItems.Count,
                                    value.CurrentRuleName ?? value.CurrentRuleId ?? "-",
                                    value.CurrentFileTextCount,
                                    totalHits + value.CurrentFileTextCount,
                                    value.FilePercent,
                                    forceRefresh);
                            });

                            var request = new ReplaceFileRequest
                            {
                                SourcePath = item.SourcePath,
                                OutputPath = item.OutputPath,
                                DiffPath = item.DiffPath,
                                SourceRootDirectory = _txtReplaceSource.Text.Trim(),
                                RuleFilePath = _txtRuleFile.Text.Trim(),
                                RuleFile = executionRuleFile,
                                EncryptDiff = encryptDiff,
                                EnableImageReplacement = _chkEnableImageReplacement.Checked,
                                FixedImageSeed = fixedImageSeed,
                            };

                            var result = await Task.Run(() => _documentProcessingService.Replace(request, progress, CancellationToken.None));
                            item.OutputPath = result.OutputPath;
                            item.DiffPath = result.DiffPath;
                            item.TextOperationCount = result.TextOperationCount;
                            item.ImageOperationCount = result.ImageOperationCount;
                            item.Status = ProcessingStatus.Success;
                            RefreshReplaceItemRow(item, forceRefresh: true);
                            successCount++;
                            totalHits += result.TextOperationCount + result.ImageOperationCount;
                            UpdateReplaceStatus(displayIndex, selectedItems.Count, "-", result.TextOperationCount + result.ImageOperationCount, totalHits, 100, forceRefresh: true);
                            var doneDetail = await Task.Run(() => BuildReplaceFileDoneDetail(item, result, displayIndex, selectedItems.Count));
                            _logService.Info(
                                "REPLACE_FILE_DONE",
                                string.Format("文件替换完成。文本 {0} 次，图片 {1} 次。", result.TextOperationCount, result.ImageOperationCount),
                                doneDetail);
                        }
                        catch (Exception ex)
                        {
                            item.Status = ProcessingStatus.Failed;
                            RefreshReplaceItemRow(item, forceRefresh: true);
                            failedCount++;
                            _replaceFileProgress.Value = 0;
                            UpdateReplaceStatus(displayIndex, selectedItems.Count, "-", 0, totalHits, 0, forceRefresh: true);
                            var failDetail = await Task.Run(() => BuildReplaceFileFailDetail(item, ex, displayIndex, selectedItems.Count));
                            _logService.Error("REPLACE_FILE_FAIL", "替换文件处理失败。", failDetail);
                        }

                        completedCount++;
                        _replaceTotalProgress.Value = Math.Min(completedCount, _replaceTotalProgress.Maximum);
                        FlushReplaceRuntimeUi(forceRefresh: true);
                    }
                }

                var workers = Enumerable.Range(0, Math.Max(plan.DegreeOfParallelism, 1))
                    .Select(_ => RunWorkerAsync())
                    .ToArray();
                await Task.WhenAll(workers);

                if (_replaceExecutionCancellation.IsCancellationRequested)
                {
                    stoppedCount += MarkRemainingItemsStopped(selectedItems.Where(item => item.Status == ProcessingStatus.Pending || item.Status == ProcessingStatus.InProgress));
                    completedCount = Math.Min(selectedItems.Count, successCount + failedCount + stoppedCount);
                    _replaceTotalProgress.Value = Math.Min(completedCount, _replaceTotalProgress.Maximum);
                    FlushControl(_gridReplace, forceRefresh: true);
                    FlushReplaceRuntimeUi(forceRefresh: true);
                }
            }
            finally
            {
                _isReplaceRunning = false;
                _replaceFileProgress.Style = ProgressBarStyle.Blocks;
                _btnStopReplace.Enabled = false;
                SetRuleEditingEnabled(true);
                UpdateActionStates();
            }

            // 批次里每个文档的 DiffPayload（含所有图片 base64）是大块瞬态分配，GC 不保证即时回收。
            // 在弹完成对话框、触发自动恢复扫描之前主动回收一次，把 ~4GB 还给系统，避免残留内存压力拖慢后续 UI。
            await Task.Run(() =>
            {
                GC.Collect();
                GC.WaitForPendingFinalizers();
            });

            CompleteReplaceRuntimeStatus(successCount + failedCount + stoppedCount, selectedItems.Count, totalHits);
            var summary = string.Format("替换完成。成功 {0}，失败 {1}，停止 {2}，累计命中 {3}。", successCount, failedCount, stoppedCount, totalHits);
            _logService.Info("REPLACE_DONE", summary);
            ShowMessage(summary, "开始替换", MessageBoxButtons.OK, failedCount > 0 ? MessageBoxIcon.Warning : MessageBoxIcon.Information);
            await RefreshRestoreScanAsync();
        }

        private async Task ExecuteRestoreBatchAsync(IList<FileScanItem> selectedItems)
        {
            _restoreExecutionCancellation?.Dispose();
            _restoreExecutionCancellation = new CancellationTokenSource();
            _isRestoreRunning = true;
            SetRuleEditingEnabled(false);

            foreach (var item in selectedItems)
            {
                item.Status = ProcessingStatus.Pending;
                item.TextOperationCount = 0;
                item.ImageOperationCount = 0;
            }

            ResetRestoreProgress(selectedItems.Count);
            UpdateActionStates();

            var plan = _batchExecutionPlanner.CreatePlan(selectedItems, Environment.ProcessorCount);
            var executionItems = plan.ExecutionItems.ToList();
            var displayOrder = executionItems
                .Select((item, index) => new { item, index = index + 1 })
                .ToDictionary(entry => entry.item, entry => entry.index);
            var successCount = 0;
            var failedCount = 0;
            var stoppedCount = 0;
            var totalHits = 0;
            var completedCount = 0;
            var nextExecutionIndex = -1;

            foreach (var skipped in plan.SkippedItems)
            {
                skipped.Item.Status = ProcessingStatus.Failed;
                RefreshRestoreItemRow(skipped.Item, forceRefresh: true);
                failedCount++;
                completedCount++;
                _restoreTotalProgress.Value = Math.Min(completedCount, _restoreTotalProgress.Maximum);
                FlushRestoreRuntimeUi(forceRefresh: true);
                _logService.Warning(
                    "RESTORE_BATCH_SKIP",
                    skipped.Message,
                    string.Format("源文件: {0}{1}冲突路径: {2}", skipped.Item.SourcePath, Environment.NewLine, skipped.ConflictingPath));
            }

            try
            {
                _logService.Info(
                    "RESTORE_BATCH_PLAN",
                    string.Format(
                        "恢复批处理开始。勾选={0}，执行={1}，预跳过={2}，并发度={3}{4}。",
                        selectedItems.Count,
                        executionItems.Count,
                        plan.SkippedItems.Count,
                        plan.DegreeOfParallelism,
                        plan.RequiresSerialExecution ? "（包含 .doc，已退回串行）" : string.Empty),
                    BuildRestoreBatchPlanDetail(selectedItems, plan));

                async Task RunWorkerAsync()
                {
                    while (true)
                    {
                        if (_restoreExecutionCancellation.IsCancellationRequested)
                        {
                            return;
                        }

                        var executionIndex = Interlocked.Increment(ref nextExecutionIndex);
                        if (executionIndex >= executionItems.Count)
                        {
                            return;
                        }

                        var item = executionItems[executionIndex];
                        var displayIndex = displayOrder[item];
                        item.Status = ProcessingStatus.InProgress;
                        RefreshRestoreItemRow(item, forceRefresh: true);
                        UpdateRestoreStatus(displayIndex, selectedItems.Count, "-", 0, totalHits, 0, forceRefresh: true);
                        var startDetail = await Task.Run(() => BuildRestoreFileStartDetail(item, displayIndex, selectedItems.Count));
                        _logService.Info("RESTORE_FILE_START", "开始处理恢复文件。", startDetail);

                        try
                        {
                            var progressThrottle = new RuntimeProgressThrottle();
                            var progress = new Progress<FileProcessProgress>(value =>
                            {
                                LogProcessProgressWarning("RESTORE_PROGRESS_WARN", value);
                                var forceRefresh = value.FilePercent >= 100;
                                if (!progressThrottle.ShouldApply(forceRefresh))
                                {
                                    return;
                                }

                                UpdateRestoreStatus(
                                    displayIndex,
                                    selectedItems.Count,
                                    value.CurrentRuleName ?? value.CurrentRuleId ?? "-",
                                    value.CurrentFileTextCount,
                                    totalHits + value.CurrentFileTextCount,
                                    value.FilePercent,
                                    forceRefresh);
                            });

                            var request = new RestoreFileRequest
                            {
                                ReplacedPath = item.SourcePath,
                                DiffPath = item.DiffPath,
                                OutputPath = item.OutputPath,
                                ReplaceRootDirectory = _txtRestoreSource.Text.Trim(),
                                CurrentRuleFilePath = _txtRuleFile.Text.Trim(),
                            };

                            var result = await Task.Run(() => _documentProcessingService.Restore(request, progress, CancellationToken.None));
                            item.OutputPath = result.OutputPath;
                            item.TextOperationCount = result.TextOperationCount;
                            item.ImageOperationCount = result.ImageOperationCount;
                            item.Status = ProcessingStatus.Success;
                            RefreshRestoreItemRow(item, forceRefresh: true);
                            successCount++;
                            totalHits += result.TextOperationCount + result.ImageOperationCount;
                            UpdateRestoreStatus(displayIndex, selectedItems.Count, "-", result.TextOperationCount + result.ImageOperationCount, totalHits, 100, forceRefresh: true);
                            var doneDetail = await Task.Run(() => BuildRestoreFileDoneDetail(item, result, displayIndex, selectedItems.Count));
                            _logService.Info(
                                "RESTORE_FILE_DONE",
                                string.Format("文件恢复完成。文本 {0} 次，图片 {1} 次。", result.TextOperationCount, result.ImageOperationCount),
                                doneDetail);
                        }
                        catch (Exception ex)
                        {
                            item.Status = ProcessingStatus.Failed;
                            RefreshRestoreItemRow(item, forceRefresh: true);
                            failedCount++;
                            _restoreFileProgress.Value = 0;
                            UpdateRestoreStatus(displayIndex, selectedItems.Count, "-", 0, totalHits, 0, forceRefresh: true);
                            var failDetail = await Task.Run(() => BuildRestoreFileFailDetail(item, ex, displayIndex, selectedItems.Count));
                            _logService.Error("RESTORE_FILE_FAIL", "恢复文件处理失败。", failDetail);
                        }

                        completedCount++;
                        _restoreTotalProgress.Value = Math.Min(completedCount, _restoreTotalProgress.Maximum);
                        FlushRestoreRuntimeUi(forceRefresh: true);
                    }
                }

                var workers = Enumerable.Range(0, Math.Max(plan.DegreeOfParallelism, 1))
                    .Select(_ => RunWorkerAsync())
                    .ToArray();
                await Task.WhenAll(workers);

                if (_restoreExecutionCancellation.IsCancellationRequested)
                {
                    stoppedCount += MarkRemainingItemsStopped(selectedItems.Where(item => item.Status == ProcessingStatus.Pending || item.Status == ProcessingStatus.InProgress));
                    completedCount = Math.Min(selectedItems.Count, successCount + failedCount + stoppedCount);
                    _restoreTotalProgress.Value = Math.Min(completedCount, _restoreTotalProgress.Maximum);
                    FlushControl(_gridRestore, forceRefresh: true);
                    FlushRestoreRuntimeUi(forceRefresh: true);
                }
            }
            finally
            {
                _isRestoreRunning = false;
                _restoreFileProgress.Style = ProgressBarStyle.Blocks;
                _btnStopRestore.Enabled = false;
                SetRuleEditingEnabled(true);
                UpdateActionStates();
            }

            // 恢复批次同样释放掉 DiffPayload 载荷，避免残留内存影响后续交互。
            await Task.Run(() =>
            {
                GC.Collect();
                GC.WaitForPendingFinalizers();
            });

            CompleteRestoreRuntimeStatus(successCount + failedCount + stoppedCount, selectedItems.Count, totalHits);
            var summary = string.Format("恢复完成。成功 {0}，失败 {1}，停止 {2}，累计命中 {3}。", successCount, failedCount, stoppedCount, totalHits);
            _logService.Info("RESTORE_DONE", summary);
            ShowMessage(summary, "开始恢复", MessageBoxButtons.OK, failedCount > 0 ? MessageBoxIcon.Warning : MessageBoxIcon.Information);
        }

        private bool PrepareRuleExecution(out RuleFile executionRuleFile)
        {
            executionRuleFile = CreateExecutionRuleFile();
            var report = _ruleService.Validate(executionRuleFile);
            foreach (var issue in report.Issues)
            {
                LogRuleIssue(issue);
            }

            if (report.Issues.Count == 0)
            {
                return true;
            }

            var summary = string.Join(Environment.NewLine, report.Issues.Select(_ruleService.FormatIssue));
            var prompt = summary + Environment.NewLine + Environment.NewLine + "是否继续执行？";
            return ShowMessage(
                prompt,
                "规则执行检查",
                MessageBoxButtons.YesNo,
                report.HasErrors ? MessageBoxIcon.Warning : MessageBoxIcon.Information) == DialogResult.Yes;
        }

        private bool PrepareRuleExecutionWithBlockingErrors(out RuleFile executionRuleFile)
        {
            executionRuleFile = CreateExecutionRuleFile();
            var report = _ruleService.Validate(executionRuleFile);
            foreach (var issue in report.Issues)
            {
                LogRuleIssue(issue);
            }

            if (report.Issues.Count == 0)
            {
                return true;
            }

            var summary = string.Join(Environment.NewLine, report.Issues.Select(_ruleService.FormatIssue));
            if (report.HasErrors)
            {
                ShowMessage(
                    summary + Environment.NewLine + Environment.NewLine + "存在错误，必须先修复后才能执行。",
                    "规则执行检查",
                    MessageBoxButtons.OK,
                    MessageBoxIcon.Warning);
                return false;
            }

            var prompt = summary + Environment.NewLine + Environment.NewLine + "是否继续执行？";
            return ShowMessage(
                prompt,
                "规则执行检查",
                MessageBoxButtons.YesNo,
                MessageBoxIcon.Information) == DialogResult.Yes;
        }

        private RuleFile CreateExecutionRuleFile()
        {
            if (_gridRules.IsHandleCreated)
            {
                _gridRules.EndEdit();
            }

            var result = new RuleFile
            {
                Format = _ruleFile.Format,
                Version = _ruleFile.Version,
            };

            foreach (var rule in _rules)
            {
                result.Rules.Add(new RuleDefinition
                {
                    Id = rule.Id,
                    Name = rule.Name,
                    IsEnabled = rule.IsEnabled,
                    MatchMode = rule.MatchMode,
                    Target = rule.Target,
                    IsCaseSensitive = rule.IsCaseSensitive,
                    IsWholeWord = rule.IsWholeWord,
                    SearchText = rule.SearchText,
                    ReplacementText = rule.ReplacementText,
                    Note = rule.Note,
                });
            }

            _ruleFile = result;
            return result;
        }

        private bool TryPersistConfigFromUi()
        {
            try
            {
                CaptureUiToConfig();
                _configurationService.Save(_config);
                return true;
            }
            catch (Exception ex)
            {
                _logService.Error("CONFIG_SAVE_FAIL", "保存当前配置失败。", ex.Message);
                ShowMessage("保存当前配置失败: " + ex.Message, "WORD 2007 格式调整软件", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return false;
            }
        }

        private void ResetReplaceProgress(int totalCount)
        {
            _replaceTotalProgress.Style = ProgressBarStyle.Blocks;
            _replaceTotalProgress.Maximum = Math.Max(totalCount, 1);
            _replaceTotalProgress.Value = 0;
            _replaceFileProgress.Style = ProgressBarStyle.Blocks;
            _replaceFileProgress.Value = 0;
            _lblReplaceRuntime.Text = "当前文件 0/0 | 当前规则 - | 当前文件命中 0 | 累计命中 0";
            FlushReplaceRuntimeUi(forceRefresh: true);
        }

        private void ResetRestoreProgress(int totalCount)
        {
            _restoreTotalProgress.Style = ProgressBarStyle.Blocks;
            _restoreTotalProgress.Maximum = Math.Max(totalCount, 1);
            _restoreTotalProgress.Value = 0;
            _restoreFileProgress.Style = ProgressBarStyle.Blocks;
            _restoreFileProgress.Value = 0;
            _lblRestoreRuntime.Text = "当前文件 0/0 | 当前规则 - | 当前文件命中 0 | 累计命中 0";
            FlushRestoreRuntimeUi(forceRefresh: true);
        }

        private void LogProcessProgressWarning(string eventCode, FileProcessProgress value)
        {
            if (value == null || !value.IsWarning || string.IsNullOrWhiteSpace(value.Message))
            {
                return;
            }

            var detail = string.IsNullOrWhiteSpace(value.FilePath) ? null : "文件: " + value.FilePath;
            _logService.Warning(eventCode, value.Message, detail);
        }

        private void UpdateReplaceStatus(int currentFile, int totalFiles, string currentRule, int currentFileHits, int totalHits, int filePercent, bool forceRefresh = false)
        {
            _replaceFileProgress.Value = Math.Max(0, Math.Min(filePercent, 100));
            _lblReplaceRuntime.Text = string.Format(
                "当前文件 {0}/{1} | 当前规则 {2} | 当前文件命中 {3} | 累计命中 {4}",
                currentFile,
                totalFiles,
                string.IsNullOrWhiteSpace(currentRule) ? "-" : currentRule,
                currentFileHits,
                totalHits);
            FlushReplaceRuntimeUi(forceRefresh);
        }

        private void CompleteReplaceRuntimeStatus(int completedFiles, int totalFiles, int totalHits)
        {
            var safeTotal = Math.Max(0, totalFiles);
            var safeCompleted = Math.Max(0, Math.Min(completedFiles, safeTotal));
            _replaceTotalProgress.Value = Math.Min(safeCompleted, _replaceTotalProgress.Maximum);
            UpdateReplaceStatus(
                safeCompleted,
                safeTotal,
                "-",
                0,
                totalHits,
                safeTotal > 0 && safeCompleted >= safeTotal ? 100 : 0,
                forceRefresh: true);
        }

        private void UpdateRestoreStatus(int currentFile, int totalFiles, string currentRule, int currentFileHits, int totalHits, int filePercent, bool forceRefresh = false)
        {
            _restoreFileProgress.Value = Math.Max(0, Math.Min(filePercent, 100));
            _lblRestoreRuntime.Text = string.Format(
                "当前文件 {0}/{1} | 当前规则 {2} | 当前文件命中 {3} | 累计命中 {4}",
                currentFile,
                totalFiles,
                string.IsNullOrWhiteSpace(currentRule) ? "-" : currentRule,
                currentFileHits,
                totalHits);
            FlushRestoreRuntimeUi(forceRefresh);
        }

        private void CompleteRestoreRuntimeStatus(int completedFiles, int totalFiles, int totalHits)
        {
            var safeTotal = Math.Max(0, totalFiles);
            var safeCompleted = Math.Max(0, Math.Min(completedFiles, safeTotal));
            _restoreTotalProgress.Value = Math.Min(safeCompleted, _restoreTotalProgress.Maximum);
            UpdateRestoreStatus(
                safeCompleted,
                safeTotal,
                "-",
                0,
                totalHits,
                safeTotal > 0 && safeCompleted >= safeTotal ? 100 : 0,
                forceRefresh: true);
        }

        private void FlushReplaceRuntimeUi(bool forceRefresh)
        {
            if (!forceRefresh && !ShouldRefreshRuntimeUi(ref _lastReplaceRuntimeFlushTick))
            {
                return;
            }

            FlushControl(_replaceFileProgress, forceRefresh);
            FlushControl(_replaceTotalProgress, forceRefresh);
            FlushControl(_lblReplaceRuntime, forceRefresh);
        }

        private void FlushRestoreRuntimeUi(bool forceRefresh)
        {
            if (!forceRefresh && !ShouldRefreshRuntimeUi(ref _lastRestoreRuntimeFlushTick))
            {
                return;
            }

            FlushControl(_restoreFileProgress, forceRefresh);
            FlushControl(_restoreTotalProgress, forceRefresh);
            FlushControl(_lblRestoreRuntime, forceRefresh);
        }

        private static bool ShouldRefreshRuntimeUi(ref int lastFlushTick)
        {
            var now = Environment.TickCount & int.MaxValue;
            if (lastFlushTick != 0 && now >= lastFlushTick && now - lastFlushTick < RuntimeUiRefreshIntervalMilliseconds)
            {
                return false;
            }

            lastFlushTick = now;
            return true;
        }

        private static bool ShouldApplyProgressUpdate(ref int lastProgressTick, bool forceRefresh)
        {
            if (forceRefresh)
            {
                lastProgressTick = Environment.TickCount & int.MaxValue;
                return true;
            }

            return ShouldRefreshRuntimeUi(ref lastProgressTick);
        }

        private static void FlushControl(Control control, bool forceRefresh)
        {
            if (control == null || control.IsDisposed || !control.IsHandleCreated)
            {
                return;
            }

            if (forceRefresh)
            {
                control.Refresh();
                return;
            }

            control.Update();
        }

        private void RefreshReplaceItemRow(FileScanItem item, bool forceRefresh = false)
        {
            RefreshFileItemRow(_gridReplace, _replaceItems, item, forceRefresh);
        }

        private void RefreshRestoreItemRow(FileScanItem item, bool forceRefresh = false)
        {
            RefreshFileItemRow(_gridRestore, _restoreItems, item, forceRefresh);
        }

        private static void RefreshFileItemRow(DataGridView grid, BindingList<FileScanItem> items, FileScanItem item, bool forceRefresh)
        {
            if (grid == null || items == null || item == null || grid.IsDisposed || !grid.IsHandleCreated)
            {
                return;
            }

            var rowIndex = items.IndexOf(item);
            if (rowIndex >= 0 && rowIndex < grid.Rows.Count)
            {
                grid.InvalidateRow(rowIndex);
            }

            FlushControl(grid, forceRefresh);
        }

        private sealed class RuntimeProgressThrottle
        {
            private int _lastProgressTick;

            public bool ShouldApply(bool forceRefresh)
            {
                return ShouldApplyProgressUpdate(ref _lastProgressTick, forceRefresh);
            }
        }

        private static int MarkRemainingItemsStopped(IEnumerable<FileScanItem> items)
        {
            var count = 0;
            foreach (var item in items)
            {
                if (item.Status == ProcessingStatus.Pending || item.Status == ProcessingStatus.InProgress)
                {
                    item.Status = ProcessingStatus.Stopped;
                    count++;
                }
            }

            return count;
        }

        private string GetSelectedRestoreDiffInputFormat()
        {
            return string.Equals(_cmbRestoreDiffInput.SelectedItem as string, ".bmp", StringComparison.OrdinalIgnoreCase)
                ? ".bmp"
                : ".diff";
        }

        private void SetRestoreDiffInputFormat(string diffInputFormat)
        {
            var normalized = string.Equals(diffInputFormat, ".bmp", StringComparison.OrdinalIgnoreCase)
                ? ".bmp"
                : ".diff";
            _cmbRestoreDiffInput.SelectedItem = normalized;
        }

        private void LoadRuleFile(string filePath)
        {
            try
            {
                _ruleFile = _ruleService.Load(filePath);
                ReplaceBinding(_rules, _ruleFile.Rules);
                _logService.Info("RULE_LOAD", "规则文件已加载。", filePath);
                UpdateActionStates();
            }
            catch (Exception ex)
            {
                _logService.Error("RULE_LOAD_FAIL", "加载规则文件失败。", ex.Message);
                ShowMessage("加载规则文件失败: " + ex.Message, "规则文件", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private async Task BrowseFolderIntoTextBoxAsync(TextBox textBox, Func<Task> refreshAsync)
        {
            string selectedPath;
            if (!ModernFolderPicker.TrySelectFolder(this, textBox.Text, out selectedPath))
            {
                return;
            }

            await ApplySelectedFolderPathAsync(textBox, selectedPath, refreshAsync);
        }

        private async Task ApplySelectedFolderPathAsync(TextBox textBox, string selectedPath, Func<Task> refreshAsync)
        {
            textBox.Text = selectedPath ?? string.Empty;
            if (refreshAsync != null)
            {
                await refreshAsync();
            }
        }

        private string GetReplacePreviewOutputDirectory(string sourceDirectory)
        {
            var output = _txtReplaceOutput.Text.Trim();
            if (string.IsNullOrWhiteSpace(output))
            {
                return string.Empty;
            }

            var validationMessages = _fileScanService.ValidateReplaceDirectories(sourceDirectory, output);
            return validationMessages.Count == 0 ? output : string.Empty;
        }

        private string GetRestorePreviewOutputDirectory(string replaceDirectory)
        {
            var output = _txtRestoreOutput.Text.Trim();
            if (string.IsNullOrWhiteSpace(output))
            {
                return string.Empty;
            }

            var validationMessages = _fileScanService.ValidateRestoreDirectories(replaceDirectory, output);
            return validationMessages.Count == 0 ? output : string.Empty;
        }

        private IList<string> GetReplaceExecutionValidationMessages()
        {
            var source = _txtReplaceSource.Text.Trim();
            var output = _txtReplaceOutput.Text.Trim();
            var messages = new List<string>();

            if (string.IsNullOrWhiteSpace(source))
            {
                messages.Add("未选择原始文件夹。");
            }
            else if (!Directory.Exists(source))
            {
                messages.Add("原始文件夹不存在。");
            }

            if (string.IsNullOrWhiteSpace(output))
            {
                messages.Add("未选择替换文件夹。");
            }

            messages.AddRange(_fileScanService.ValidateReplaceDirectories(source, output));
            return messages;
        }

        private IList<string> GetRestoreExecutionValidationMessages()
        {
            var source = _txtRestoreSource.Text.Trim();
            var output = _txtRestoreOutput.Text.Trim();
            var messages = new List<string>();

            if (string.IsNullOrWhiteSpace(source))
            {
                messages.Add("未选择替换文件夹。");
            }
            else if (!Directory.Exists(source))
            {
                messages.Add("替换文件夹不存在。");
            }

            if (string.IsNullOrWhiteSpace(output))
            {
                messages.Add("未选择恢复文件夹。");
            }

            messages.AddRange(_fileScanService.ValidateRestoreDirectories(source, output));
            return messages;
        }

        private void UpdateActionStates()
        {
            var hasReplaceSelection = _replaceItems.Any(item => item.IsSelected);
            var hasRestoreSelection = _restoreItems.Any(item => item.IsSelected);
            var busy = _isAutoExtractRunning || _isReplaceRunning || _isRestoreRunning;
            var canEditReplacePage = !busy;
            var canEditRestorePage = !busy;
            var canEditRules = !busy && _gridRules.Enabled;
            var canExecuteReplace = !busy && hasReplaceSelection && GetReplaceExecutionValidationMessages().Count == 0;
            var canExecuteRestore = !busy && hasRestoreSelection && GetRestoreExecutionValidationMessages().Count == 0;

            _btnAutoExtract.Enabled = !_isAutoExtractRunning && !_isReplaceRunning && !_isRestoreRunning && hasReplaceSelection;
            _btnStartReplace.Enabled = canExecuteReplace;
            _btnStopReplace.Enabled = _isAutoExtractRunning || _isReplaceRunning;
            _btnStartRestore.Enabled = canExecuteRestore;
            _btnStopRestore.Enabled = _isRestoreRunning;

            _txtReplaceSource.Enabled = canEditReplacePage;
            _txtReplaceOutput.Enabled = canEditReplacePage;
            _btnBrowseReplaceSource.Enabled = canEditReplacePage;
            _btnBrowseReplaceOutput.Enabled = canEditReplacePage;
            _btnSelectAllReplace.Enabled = canEditReplacePage && _replaceItems.Count > 0;
            _btnClearReplace.Enabled = canEditReplacePage && _replaceItems.Count > 0;
            _gridReplace.ReadOnly = busy;

            _txtRestoreSource.Enabled = canEditRestorePage;
            _txtRestoreOutput.Enabled = canEditRestorePage;
            _cmbRestoreDiffInput.Enabled = canEditRestorePage;
            _btnBrowseRestoreSource.Enabled = canEditRestorePage;
            _btnBrowseRestoreOutput.Enabled = canEditRestorePage;
            _btnSelectAllRestore.Enabled = canEditRestorePage && _restoreItems.Count > 0;
            _btnClearRestore.Enabled = canEditRestorePage && _restoreItems.Count > 0;
            _gridRestore.ReadOnly = busy;

            _gridRules.Enabled = canEditRules;
            _txtRuleFile.Enabled = canEditRules;
            _btnOpenRules.Enabled = canEditRules;
            _btnSaveRules.Enabled = canEditRules;
            _btnUndoAutoExtract.Enabled = canEditRules && _lastAutoExtractRuleIds.Count > 0;
        }

        private void SetRuleEditingEnabled(bool enabled)
        {
            _gridRules.Enabled = enabled;
            _txtRuleFile.Enabled = enabled;
            UpdateActionStates();
        }

        private void LogRuleIssue(RuleValidationIssue issue)
        {
            var formatted = _ruleService.FormatIssue(issue);
            if (issue.Severity == RuleValidationSeverity.Error)
            {
                _logService.Error("RULE_CHECK", formatted);
            }
            else if (issue.Severity == RuleValidationSeverity.Warning)
            {
                _logService.Warning("RULE_CHECK", formatted);
            }
            else
            {
                _logService.Info("RULE_CHECK", formatted);
            }
        }

        private void SetSelection(IList<FileScanItem> items, bool isSelected)
        {
            foreach (var item in items)
            {
                item.IsSelected = isSelected;
            }

            UpdateActionStates();
        }

        private void SetSelectedFileItems(DataGridView grid, bool isSelected)
        {
            foreach (var item in GetSelectedDataBoundItems<FileScanItem>(grid))
            {
                item.IsSelected = isSelected;
            }

            grid.Refresh();
            UpdateActionStates();
        }

        private void DeleteSelectedFileItems(BindingList<FileScanItem> items, DataGridView grid)
        {
            foreach (var item in GetSelectedDataBoundItems<FileScanItem>(grid))
            {
                items.Remove(item);
            }

            UpdateActionStates();
        }

        private void SetSelectedRulesEnabled(bool isEnabled)
        {
            foreach (var rule in GetSelectedDataBoundItems<RuleDefinition>(_gridRules))
            {
                rule.IsEnabled = isEnabled;
            }

            RefreshRuleState();
        }

        private void DeleteSelectedRules()
        {
            foreach (var rule in GetSelectedDataBoundItems<RuleDefinition>(_gridRules))
            {
                _rules.Remove(rule);
            }

            RefreshRuleState();
        }

        private void RefreshRuleState()
        {
            _ruleFile.Rules = _rules.ToList();

            var existingRuleIds = new HashSet<string>(
                _rules.Where(item => !string.IsNullOrWhiteSpace(item.Id)).Select(item => item.Id),
                StringComparer.OrdinalIgnoreCase);
            _lastAutoExtractRuleIds = _lastAutoExtractRuleIds.Where(existingRuleIds.Contains).ToList();

            _gridRules.Refresh();
            UpdateActionStates();
        }

        private static List<T> GetSelectedDataBoundItems<T>(DataGridView grid)
            where T : class
        {
            return grid.SelectedRows
                .Cast<DataGridViewRow>()
                .OrderBy(row => row.Index)
                .Select(row => row.DataBoundItem as T)
                .Where(item => item != null)
                .ToList();
        }

        private static List<int> NormalizeIndexes(IEnumerable<int> rowIndexes, int count)
        {
            return (rowIndexes ?? Array.Empty<int>())
                .Where(index => index >= 0 && index < count)
                .Distinct()
                .OrderBy(index => index)
                .ToList();
        }

        private static void ReplaceBinding<T>(BindingList<T> target, IEnumerable<T> source)
        {
            target.Clear();
            foreach (var item in source)
            {
                target.Add(item);
            }
        }

        private static void ConfigureNumeric(NumericUpDown numeric, int minimum, int maximum)
        {
            numeric.Minimum = minimum;
            numeric.Maximum = maximum;
            numeric.Width = 120;
        }

        private static Control CreateProgressLine(string labelText, ProgressBar progressBar)
        {
            var panel = new TableLayoutPanel
            {
                Dock = DockStyle.Top,
                ColumnCount = 2,
                AutoSize = true,
            };
            panel.ColumnStyles.Add(new ColumnStyle(SizeType.Absolute, 90F));
            panel.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 100F));
            panel.Controls.Add(new Label { Text = labelText, Anchor = AnchorStyles.Left, AutoSize = true }, 0, 0);
            progressBar.Dock = DockStyle.Fill;
            progressBar.Maximum = 100;
            panel.Controls.Add(progressBar, 1, 0);
            return panel;
        }

        private static void AddLabeledRow(
            TableLayoutPanel layout,
            int rowIndex,
            string leftLabel,
            Control leftTextBox,
            Control leftButton,
            string rightLabel,
            Control rightTextBox,
            Control rightButton)
        {
            layout.RowStyles.Add(new RowStyle(SizeType.AutoSize));
            layout.Controls.Add(new Label { Text = leftLabel, Anchor = AnchorStyles.Left, AutoSize = true }, 0, rowIndex);
            leftTextBox.Dock = DockStyle.Fill;
            layout.Controls.Add(leftTextBox, 1, rowIndex);
            layout.Controls.Add(leftButton, 2, rowIndex);
            layout.Controls.Add(new Label { Text = rightLabel, Anchor = AnchorStyles.Left, AutoSize = true }, 3, rowIndex);
            rightTextBox.Dock = DockStyle.Fill;
            layout.Controls.Add(rightTextBox, 4, rowIndex);
            layout.Controls.Add(rightButton, 5, rowIndex);
        }

        private static void AddSettingRow(TableLayoutPanel layout, int rowIndex, Control leftControl, Control rightControl)
        {
            layout.RowStyles.Add(new RowStyle(SizeType.AutoSize));
            leftControl.Dock = DockStyle.Fill;
            rightControl.Dock = DockStyle.Fill;
            layout.Controls.Add(leftControl, 0, rowIndex);
            layout.Controls.Add(rightControl, 1, rowIndex);
        }

        private void ConfigureFileGrid(DataGridView grid, bool isRestoreGrid)
        {
            grid.AllowUserToAddRows = false;
            grid.AllowUserToDeleteRows = false;
            grid.AutoGenerateColumns = false;
            grid.MultiSelect = true;
            grid.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
            grid.EditMode = DataGridViewEditMode.EditOnEnter;
            grid.Columns.Clear();

            var checkColumn = new DataGridViewCheckBoxColumn
            {
                DataPropertyName = nameof(FileScanItem.IsSelected),
                HeaderText = "勾选",
                Width = 60,
            };
            grid.Columns.Add(checkColumn);
            grid.Columns.Add(new DataGridViewTextBoxColumn
            {
                DataPropertyName = nameof(FileScanItem.SourcePath),
                HeaderText = isRestoreGrid ? "替换后文件路径" : "原始文件路径",
                Width = 360,
                ReadOnly = true,
            });
            grid.Columns.Add(new DataGridViewTextBoxColumn
            {
                DataPropertyName = nameof(FileScanItem.OutputPath),
                HeaderText = isRestoreGrid ? "恢复文件路径" : "替换后文件路径",
                Width = 360,
                ReadOnly = true,
            });
            grid.Columns.Add(new DataGridViewTextBoxColumn
            {
                DataPropertyName = nameof(FileScanItem.DiffPath),
                HeaderText = "差异文件路径",
                Width = 320,
                ReadOnly = true,
            });
            grid.Columns.Add(new DataGridViewTextBoxColumn
            {
                DataPropertyName = nameof(FileScanItem.TextOperationCount),
                HeaderText = isRestoreGrid ? "文本恢复次数" : "文本替换次数",
                Width = 110,
            });
            grid.Columns.Add(new DataGridViewTextBoxColumn
            {
                DataPropertyName = nameof(FileScanItem.ImageOperationCount),
                HeaderText = isRestoreGrid ? "图片恢复次数" : "图片替换次数",
                Width = 110,
            });
            grid.Columns.Add(new DataGridViewTextBoxColumn
            {
                DataPropertyName = nameof(FileScanItem.Status),
                HeaderText = "当前状态",
                Width = 90,
                ReadOnly = true,
            });

            grid.CurrentCellDirtyStateChanged += Grid_CurrentCellDirtyStateChanged;
            grid.CellValueChanged += GridSelection_CellValueChanged;
            grid.CellMouseDown += Grid_CellMouseDownSelectRow;
            grid.RowPrePaint += Grid_RowPrePaint;
        }

        private void ConfigureRuleGrid(DataGridView grid)
        {
            grid.AllowUserToAddRows = false;
            grid.AllowUserToDeleteRows = false;
            grid.AutoGenerateColumns = false;
            grid.MultiSelect = true;
            grid.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
            grid.EditMode = DataGridViewEditMode.EditOnEnter;
            grid.Columns.Clear();

            grid.Columns.Add(new DataGridViewTextBoxColumn { DataPropertyName = nameof(RuleDefinition.Id), HeaderText = "规则 ID", Width = 110 });
            grid.Columns.Add(new DataGridViewTextBoxColumn { DataPropertyName = nameof(RuleDefinition.Name), HeaderText = "规则名称", Width = 140 });
            grid.Columns.Add(new DataGridViewCheckBoxColumn { DataPropertyName = nameof(RuleDefinition.IsEnabled), HeaderText = "启用", Width = 60 });
            grid.Columns.Add(new DataGridViewComboBoxColumn
            {
                DataPropertyName = nameof(RuleDefinition.MatchMode),
                HeaderText = "匹配模式",
                Width = 110,
                DataSource = Enum.GetValues(typeof(RuleMatchMode)),
            });
            grid.Columns.Add(new DataGridViewComboBoxColumn
            {
                DataPropertyName = nameof(RuleDefinition.Target),
                HeaderText = "目标类型",
                Width = 100,
                DataSource = Enum.GetValues(typeof(RuleTarget)),
                ValueType = typeof(RuleTarget),
            });
            grid.Columns.Add(new DataGridViewCheckBoxColumn { DataPropertyName = nameof(RuleDefinition.IsCaseSensitive), HeaderText = "区分大小写", Width = 90 });
            grid.Columns.Add(new DataGridViewCheckBoxColumn { DataPropertyName = nameof(RuleDefinition.IsWholeWord), HeaderText = "全字匹配", Width = 90 });
            grid.Columns.Add(new DataGridViewTextBoxColumn { DataPropertyName = nameof(RuleDefinition.SearchText), HeaderText = "原文本/表达式", Width = 200 });
            grid.Columns.Add(new DataGridViewTextBoxColumn { DataPropertyName = nameof(RuleDefinition.ReplacementText), HeaderText = "新文本/模板", Width = 180 });
            grid.Columns.Add(new DataGridViewTextBoxColumn { DataPropertyName = nameof(RuleDefinition.Note), HeaderText = "备注", Width = 320 });

            grid.CurrentCellDirtyStateChanged += Grid_CurrentCellDirtyStateChanged;
            grid.CellValueChanged += GridSelection_CellValueChanged;
            grid.CellMouseDown += Grid_CellMouseDownSelectRow;
            grid.DataError += delegate { };
        }

        private void Grid_CurrentCellDirtyStateChanged(object sender, EventArgs e)
        {
            var grid = sender as DataGridView;
            if (grid != null && grid.IsCurrentCellDirty && grid.CurrentCell is DataGridViewCheckBoxCell)
            {
                grid.CommitEdit(DataGridViewDataErrorContexts.Commit);
            }
        }

        private void GridSelection_CellValueChanged(object sender, DataGridViewCellEventArgs e)
        {
            UpdateActionStates();
        }

        private void Grid_CellMouseDownSelectRow(object sender, DataGridViewCellMouseEventArgs e)
        {
            if (e.Button != MouseButtons.Right || e.RowIndex < 0)
            {
                return;
            }

            var grid = sender as DataGridView;
            if (grid == null || e.RowIndex >= grid.Rows.Count)
            {
                return;
            }

            var row = grid.Rows[e.RowIndex];
            if (!row.Selected)
            {
                grid.ClearSelection();
                row.Selected = true;
            }

            if (e.ColumnIndex >= 0 && e.ColumnIndex < row.Cells.Count)
            {
                grid.CurrentCell = row.Cells[e.ColumnIndex];
            }
        }

        private void Grid_RowPrePaint(object sender, DataGridViewRowPrePaintEventArgs e)
        {
            var grid = sender as DataGridView;
            if (grid == null || e.RowIndex < 0 || e.RowIndex >= grid.Rows.Count)
            {
                return;
            }

            var item = grid.Rows[e.RowIndex].DataBoundItem as FileScanItem;
            if (item == null)
            {
                return;
            }

            var color = Color.Black;
            switch (item.Status)
            {
                case ProcessingStatus.Success:
                    color = Color.Green;
                    break;
                case ProcessingStatus.Failed:
                    color = Color.Red;
                    break;
                case ProcessingStatus.InProgress:
                    color = Color.Blue;
                    break;
                case ProcessingStatus.Stopped:
                    color = Color.Gray;
                    break;
            }

            grid.Rows[e.RowIndex].DefaultCellStyle.ForeColor = color;
        }

        private DialogResult ShowMessage(string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon)
        {
            return _dialogService.ShowMessage(this, text, caption, buttons, icon);
        }

        internal Task ExecuteReplaceBatchForTestAsync(IList<FileScanItem> selectedItems, RuleFile executionRuleFile, string sourceRootDirectory, string ruleFilePath, bool encryptDiff, int? fixedImageSeed)
        {
            _txtReplaceSource.Text = sourceRootDirectory ?? string.Empty;
            _txtRuleFile.Text = ruleFilePath ?? string.Empty;
            _chkJsonDiffEncryption.Checked = encryptDiff;
            _chkUseFixedImageSeed.Checked = fixedImageSeed.HasValue;
            _numFixedImageSeed.Value = Math.Max(_numFixedImageSeed.Minimum, Math.Min(_numFixedImageSeed.Maximum, fixedImageSeed ?? 0));
            return ExecuteReplaceBatchAsync(selectedItems, executionRuleFile);
        }

        internal Task ExecuteRestoreBatchForTestAsync(IList<FileScanItem> selectedItems, string replaceRootDirectory, string ruleFilePath)
        {
            _txtRestoreSource.Text = replaceRootDirectory ?? string.Empty;
            _txtRuleFile.Text = ruleFilePath ?? string.Empty;
            return ExecuteRestoreBatchAsync(selectedItems);
        }

        internal Task RefreshReplaceScanForTestAsync(string sourceDirectory, string outputDirectory)
        {
            _txtReplaceSource.Text = sourceDirectory ?? string.Empty;
            _txtReplaceOutput.Text = outputDirectory ?? string.Empty;
            return RefreshReplaceScanAsync();
        }

        internal Task ApplyReplaceSourceSelectionForTestAsync(string selectedPath)
        {
            return ApplySelectedFolderPathAsync(_txtReplaceSource, selectedPath, RefreshReplaceScanAsync);
        }

        internal Task ApplyReplaceOutputSelectionForTestAsync(string selectedPath)
        {
            return ApplySelectedFolderPathAsync(_txtReplaceOutput, selectedPath, RefreshReplaceScanAsync);
        }

        internal Task RefreshRestoreScanForTestAsync(string sourceDirectory, string outputDirectory, string diffInputFormat)
        {
            _txtRestoreSource.Text = sourceDirectory ?? string.Empty;
            _txtRestoreOutput.Text = outputDirectory ?? string.Empty;
            SetRestoreDiffInputFormat(diffInputFormat);
            return RefreshRestoreScanAsync();
        }

        internal Task ApplyRestoreSourceSelectionForTestAsync(string selectedPath)
        {
            return ApplySelectedFolderPathAsync(_txtRestoreSource, selectedPath, RefreshRestoreScanAsync);
        }

        internal Task ApplyRestoreOutputSelectionForTestAsync(string selectedPath)
        {
            return ApplySelectedFolderPathAsync(_txtRestoreOutput, selectedPath, RefreshRestoreScanAsync);
        }

        internal Task SetRestoreDiffInputForTestAsync(string diffInputFormat)
        {
            SetRestoreDiffInputFormat(diffInputFormat);
            return RefreshRestoreScanAsync();
        }

        internal Task RunAutoExtractForTestAsync(IList<FileScanItem> replaceItems, IList<RuleDefinition> existingRules, AutoExtractSettings settings)
        {
            ReplaceBinding(_replaceItems, replaceItems ?? Array.Empty<FileScanItem>());
            ReplaceBinding(_rules, existingRules ?? Array.Empty<RuleDefinition>());
            _ruleFile.Rules = _rules.ToList();

            if (settings != null)
            {
                _config.Settings.AutoExtract = settings;
                ApplyConfigToUi();
            }

            UpdateActionStates();
            return RunAutoExtractAsync();
        }

        internal void RequestStopReplaceForTest()
        {
            if (_isReplaceRunning && _replaceExecutionCancellation != null && !_replaceExecutionCancellation.IsCancellationRequested)
            {
                _replaceExecutionCancellation.Cancel();
            }
        }

        internal void RequestStopRestoreForTest()
        {
            if (_isRestoreRunning && _restoreExecutionCancellation != null && !_restoreExecutionCancellation.IsCancellationRequested)
            {
                _restoreExecutionCancellation.Cancel();
            }
        }

        internal void RaiseLogWriteFailureForTest(LogWriteFailureEventArgs e)
        {
            LogService_WriteFailed(this, e);
        }

        internal void UndoAutoExtractForTest()
        {
            UndoAutoExtract_Click(this, EventArgs.Empty);
        }

        internal void LoadReplaceItemsForTest(IList<FileScanItem> items)
        {
            ReplaceBinding(_replaceItems, items ?? Array.Empty<FileScanItem>());
            UpdateActionStates();
        }

        internal void LoadRestoreItemsForTest(IList<FileScanItem> items)
        {
            ReplaceBinding(_restoreItems, items ?? Array.Empty<FileScanItem>());
            UpdateActionStates();
        }

        internal void LoadRulesForTest(IList<RuleDefinition> rules)
        {
            ReplaceBinding(_rules, rules ?? Array.Empty<RuleDefinition>());
            RefreshRuleState();
        }

        internal IList<string> LogContextMenuItemsForTest
        {
            get { return GetContextMenuTexts(_logBox.ContextMenuStrip); }
        }

        internal IList<string> ReplaceContextMenuItemsForTest
        {
            get { return GetContextMenuTexts(_gridReplace.ContextMenuStrip); }
        }

        internal IList<string> RestoreContextMenuItemsForTest
        {
            get { return GetContextMenuTexts(_gridRestore.ContextMenuStrip); }
        }

        internal IList<string> RuleContextMenuItemsForTest
        {
            get { return GetContextMenuTexts(_gridRules.ContextMenuStrip); }
        }

        internal bool IsRuleEditingEnabledForTest
        {
            get { return _gridRules.Enabled; }
        }

        internal bool IsUndoAutoExtractEnabledForTest
        {
            get { return _btnUndoAutoExtract.Enabled; }
        }

        internal bool IsAutoExtractEnabledForTest
        {
            get { return _btnAutoExtract.Enabled; }
        }

        internal bool IsStartReplaceEnabledForTest
        {
            get { return _btnStartReplace.Enabled; }
        }

        internal bool IsStartRestoreEnabledForTest
        {
            get { return _btnStartRestore.Enabled; }
        }

        internal bool IsStopReplaceEnabledForTest
        {
            get { return _btnStopReplace.Enabled; }
        }

        internal bool IsStopRestoreEnabledForTest
        {
            get { return _btnStopRestore.Enabled; }
        }

        internal string ReplaceRuntimeTextForTest
        {
            get { return _lblReplaceRuntime.Text; }
        }

        internal string RestoreRuntimeTextForTest
        {
            get { return _lblRestoreRuntime.Text; }
        }

        internal string RestoreBrowseSourceButtonTextForTest
        {
            get { return _btnBrowseRestoreSource.Text; }
        }

        internal string RestoreBrowseOutputButtonTextForTest
        {
            get { return _btnBrowseRestoreOutput.Text; }
        }

        internal string RestoreSelectAllButtonTextForTest
        {
            get { return _btnSelectAllRestore.Text; }
        }

        internal string RestoreClearButtonTextForTest
        {
            get { return _btnClearRestore.Text; }
        }

        internal int SettingsRuleListWidthForTest
        {
            get
            {
                return _settingsRuleListSplitContainer == null
                    ? 0
                    : _settingsRuleListSplitContainer.ClientSize.Width - _settingsRuleListSplitContainer.SplitterWidth - _settingsRuleListSplitContainer.SplitterDistance;
            }
        }

        internal void ApplySettingsRuleListInitialWidthForTest(int width)
        {
            if (_settingsRuleListSplitContainer == null)
            {
                throw new InvalidOperationException("设置页规则列表分隔容器尚未初始化。");
            }

            _settingsRuleListInitialWidthApplied = false;
            _settingsRuleListSplitContainer.Width = width;
            ApplySettingsRuleListInitialWidth(_settingsRuleListSplitContainer);
        }

        internal string SelectedTabTextForTest
        {
            get { return _tabControl.SelectedTab == null ? string.Empty : _tabControl.SelectedTab.Text; }
        }

        internal int SelectedRuleIndexForTest
        {
            get
            {
                if (_gridRules.SelectedRows.Count > 0)
                {
                    return _gridRules.SelectedRows[0].Index;
                }

                if (_gridRules.CurrentCell != null)
                {
                    return _gridRules.CurrentCell.RowIndex;
                }

                return -1;
            }
        }

        internal IList<RuleDefinition> RulesForTest
        {
            get { return _rules.Select(CloneRule).ToList(); }
        }

        internal IList<FileScanItem> ReplaceItemsForTest
        {
            get { return _replaceItems.Select(CloneFileScanItem).ToList(); }
        }

        internal IList<FileScanItem> RestoreItemsForTest
        {
            get { return _restoreItems.Select(CloneFileScanItem).ToList(); }
        }

        internal string LogTextForTest
        {
            get { return _logBox.Text; }
        }

        internal string LogCopyTextForTest
        {
            get { return GetAllLogText(); }
        }

        internal void AppendLogTextForTest(string text)
        {
            if (!string.IsNullOrEmpty(text))
            {
                _logBox.AppendText(text);
            }
        }

        internal void ClearLogsForTest()
        {
            ClearLogBox();
        }

        internal void SetReplaceItemSelectionForTest(IEnumerable<int> rowIndexes, bool isSelected)
        {
            foreach (var index in NormalizeIndexes(rowIndexes, _replaceItems.Count))
            {
                _replaceItems[index].IsSelected = isSelected;
            }

            UpdateActionStates();
        }

        internal void DeleteReplaceItemsForTest(IEnumerable<int> rowIndexes)
        {
            foreach (var index in NormalizeIndexes(rowIndexes, _replaceItems.Count).OrderByDescending(item => item))
            {
                _replaceItems.RemoveAt(index);
            }

            UpdateActionStates();
        }

        internal void SetRestoreItemSelectionForTest(IEnumerable<int> rowIndexes, bool isSelected)
        {
            foreach (var index in NormalizeIndexes(rowIndexes, _restoreItems.Count))
            {
                _restoreItems[index].IsSelected = isSelected;
            }

            UpdateActionStates();
        }

        internal void DeleteRestoreItemsForTest(IEnumerable<int> rowIndexes)
        {
            foreach (var index in NormalizeIndexes(rowIndexes, _restoreItems.Count).OrderByDescending(item => item))
            {
                _restoreItems.RemoveAt(index);
            }

            UpdateActionStates();
        }

        internal void SetRuleEnabledForTest(IEnumerable<int> rowIndexes, bool isEnabled)
        {
            foreach (var index in NormalizeIndexes(rowIndexes, _rules.Count))
            {
                _rules[index].IsEnabled = isEnabled;
            }

            RefreshRuleState();
        }

        internal void DeleteRulesForTest(IEnumerable<int> rowIndexes)
        {
            foreach (var index in NormalizeIndexes(rowIndexes, _rules.Count).OrderByDescending(item => item))
            {
                _rules.RemoveAt(index);
            }

            RefreshRuleState();
        }

        private static FileScanItem CloneFileScanItem(FileScanItem source)
        {
            if (source == null)
            {
                return new FileScanItem();
            }

            return new FileScanItem
            {
                IsSelected = source.IsSelected,
                SourcePath = source.SourcePath,
                OutputPath = source.OutputPath,
                DiffPath = source.DiffPath,
                TextOperationCount = source.TextOperationCount,
                ImageOperationCount = source.ImageOperationCount,
                Status = source.Status,
            };
        }

        private static RuleDefinition CloneRule(RuleDefinition source)
        {
            if (source == null)
            {
                return new RuleDefinition();
            }

            return new RuleDefinition
            {
                Id = source.Id,
                Name = source.Name,
                IsEnabled = source.IsEnabled,
                MatchMode = source.MatchMode,
                IsCaseSensitive = source.IsCaseSensitive,
                IsWholeWord = source.IsWholeWord,
                SearchText = source.SearchText,
                ReplacementText = source.ReplacementText,
                Note = source.Note,
            };
        }

        private static List<string> GetContextMenuTexts(ContextMenuStrip contextMenu)
        {
            if (contextMenu == null)
            {
                return new List<string>();
            }

            return contextMenu.Items.Cast<ToolStripItem>().Select(item => item.Text).ToList();
        }
    }
}