const form = document.querySelector("#upload-form");
const skillUploadForm = document.querySelector("#skill-upload-form");
const skillCollectionSelect = document.querySelector("#skill-collection");
const skillUploadStatus = document.querySelector("#skill-upload-status");
const result = document.querySelector("#result");
const summary = document.querySelector("#summary");
const skills = document.querySelector("#skills");
const mdLink = document.querySelector("#download-md");
const progressBar = document.querySelector("#analysis-progress");
const statusText = document.querySelector("#analysis-status");
const button = form.querySelector("button");

async function pollTask(statusUrl) {
  while (true) {
    const response = await fetch(statusUrl);
    const payload = await response.json();

    progressBar.style.width = `${payload.progress || 0}%`;
    statusText.textContent = payload.message || "分析中";

    if (payload.status === "completed") {
      return payload;
    }

    if (payload.status === "error") {
      throw new Error(payload.error || "分析失败");
    }

    await new Promise((resolve) => setTimeout(resolve, 1000));
  }
}

function renderSkillCollections(collections, selectedSlug) {
  const currentValue = selectedSlug || skillCollectionSelect.value;
  skillCollectionSelect.innerHTML = "";

  collections.forEach((collection) => {
    const option = document.createElement("option");
    option.value = collection.slug;
    option.textContent = `${collection.label}（${collection.skill_count}）`;
    if (collection.slug === currentValue) {
      option.selected = true;
    }
    skillCollectionSelect.appendChild(option);
  });
}

async function refreshSkillCollections(selectedSlug) {
  const response = await fetch("/skill-collections");
  const payload = await response.json();
  if (!response.ok) {
    throw new Error(payload.detail || "技能合集刷新失败");
  }
  renderSkillCollections(payload.collections, selectedSlug);
}

skillUploadForm.addEventListener("submit", async (event) => {
  event.preventDefault();

  const uploadButton = skillUploadForm.querySelector("button");
  uploadButton.disabled = true;
  uploadButton.textContent = "上传中...";
  skillUploadStatus.textContent = "正在上传并解压技能合集...";

  try {
    const data = new FormData(skillUploadForm);
    const response = await fetch("/skill-collections/upload", {
      method: "POST",
      body: data,
    });
    const payload = await response.json();
    if (!response.ok) {
      throw new Error(payload.detail || "上传失败");
    }

    renderSkillCollections(payload.collections, payload.collection.slug);
    skillUploadForm.reset();
    skillUploadStatus.textContent = payload.message;
  } catch (error) {
    skillUploadStatus.textContent = error.message;
  } finally {
    uploadButton.disabled = false;
    uploadButton.textContent = "上传合集";
  }
});

refreshSkillCollections().catch((error) => {
  skillUploadStatus.textContent = error.message;
});

form.addEventListener("submit", async (event) => {
  event.preventDefault();
  button.disabled = true;
  button.textContent = "分析中...";
  result.hidden = true;
  progressBar.style.width = "0%";
  statusText.textContent = "任务提交中...";

  const data = new FormData(form);
  if (!data.has("use_model")) {
    data.set("use_model", "false");
  }

  try {
    const response = await fetch("/analyze", {
      method: "POST",
      body: data,
    });
    const payload = await response.json();
    if (!response.ok) {
      throw new Error(payload.detail || "分析失败");
    }

    result.hidden = false;
    const task = await pollTask(payload.status_url);
    summary.textContent = task.summary;
    skills.innerHTML = "";
    task.matched_skills.forEach((name) => {
      const item = document.createElement("span");
      item.textContent = name;
      skills.appendChild(item);
    });
    mdLink.href = task.downloads.markdown;
  } catch (error) {
    summary.textContent = error.message;
    skills.innerHTML = "";
    result.hidden = false;
    statusText.textContent = "分析失败";
  } finally {
    button.disabled = false;
    button.textContent = "开始分析";
  }
});