using System.Collections.Generic;

namespace DCIT.Core.Models
{
    public enum BatchExecutionSkipReason
    {
        DuplicateSourcePath = 0,
        DuplicateOutputPath = 1,
        DuplicateDiffPath = 2
    }

    public sealed class BatchExecutionSkipItem
    {
        public FileScanItem Item { get; set; }

        public BatchExecutionSkipReason Reason { get; set; }

        public string ConflictingPath { get; set; }

        public string ExistingPath { get; set; }

        public string Message
        {
            get
            {
                switch (Reason)
                {
                    case BatchExecutionSkipReason.DuplicateSourcePath:
                        return "源文件与批次中已有任务重复，已跳过。";
                    case BatchExecutionSkipReason.DuplicateOutputPath:
                        return "输出目标与批次中已有任务冲突，已跳过。";
                    case BatchExecutionSkipReason.DuplicateDiffPath:
                        return "差异文件目标与批次中已有任务冲突，已跳过。";
                    default:
                        return "批处理任务冲突，已跳过。";
                }
            }
        }
    }

    public sealed class BatchExecutionPlan
    {
        public IList<FileScanItem> ExecutionItems { get; set; } = new List<FileScanItem>();

        public IList<BatchExecutionSkipItem> SkippedItems { get; set; } = new List<BatchExecutionSkipItem>();

        public int DegreeOfParallelism { get; set; } = 1;

        public bool RequiresSerialExecution { get; set; }
    }
}