const $ = (selector) => document.querySelector(selector);
const $$ = (selector) => document.querySelectorAll(selector);

const state = {
  meetingId: null,
  meetings: [],
  templateName: "template1.md",
  templates: [],
  processing: false,
  guideBusy: false,
  resultEditMode: false,
  rightEditMode: false,
  processGuideEditMode: false,
  selectedTreeKey: "",
  rightResource: null,
  settingsDraft: null,
};

const STORAGE_KEY = "meeting-workspace-preferences";

function loadPreferences() {
  try {
    const raw = window.localStorage.getItem(STORAGE_KEY);
    return raw ? JSON.parse(raw) : {};
  } catch {
    return {};
  }
}

function savePreferences(partial) {
  const next = { ...loadPreferences(), ...partial };
  window.localStorage.setItem(STORAGE_KEY, JSON.stringify(next));
}

function applySavedLayout() {
  const prefs = loadPreferences();
  const sidebar = $("#sidebar");
  const resultPanel = $("#result-panel");
  const templatePanel = $("#template-panel");

  if (prefs.layout?.sidebarWidth) {
    sidebar.style.flexBasis = `${prefs.layout.sidebarWidth}px`;
    sidebar.style.flexGrow = "0";
  }
  if (prefs.layout?.templateWidth) {
    templatePanel.style.flexBasis = `${prefs.layout.templateWidth}px`;
    templatePanel.style.flexGrow = "0";
  }
  if (prefs.layout?.resultWidth) {
    resultPanel.style.flexBasis = `${prefs.layout.resultWidth}px`;
    resultPanel.style.flexGrow = "0";
  }
  if (prefs.templateName) {
    state.templateName = prefs.templateName;
  }
}

function persistLayout() {
  savePreferences({
    layout: {
      sidebarWidth: Math.round($("#sidebar").getBoundingClientRect().width),
      resultWidth: Math.round($("#result-panel").getBoundingClientRect().width),
      templateWidth: Math.round($("#template-panel").getBoundingClientRect().width),
    },
  });
}

function toast(message, type = "ok") {
  const el = $("#toast");
  el.textContent = message;
  el.className = `toast ${type} show`;
  clearTimeout(el._timer);
  el._timer = setTimeout(() => el.classList.remove("show"), 2400);
}

function openModal(id) {
  document.getElementById(id).classList.add("show");
}

function closeModal(id) {
  document.getElementById(id).classList.remove("show");
}

function cloneSettingsDraft(draft) {
  return {
    active_api_profile_name: draft.active_api_profile_name || "",
    api_profiles: (draft.api_profiles || []).map((item) => ({
      name: item.name,
      api_base_url: item.api_base_url,
      api_key: item.api_key,
      model_name: item.model_name,
      max_tokens: item.max_tokens,
    })),
  };
}

async function api(url, options) {
  const res = await fetch(url, options || {});
  if (!res.ok) {
    const detail = await res.json().catch(() => ({ detail: res.statusText }));
    throw new Error(detail.detail || "Request failed");
  }
  return res.json();
}

function meetingById(meetingId) {
  return state.meetings.find((item) => item.id === meetingId) || null;
}

function patchMeeting(meetingId, partial) {
  state.meetings = state.meetings.map((item) => (
    item.id === meetingId ? { ...item, ...partial } : item
  ));
}

function templateMetaByName(name) {
  return state.templates.find((item) => item.name === name) || null;
}

function isMarkdownFile(name = "") {
  return name.toLowerCase().endsWith(".md");
}

function setStatus(side, isBusy, text = "空闲") {
  const light = $(`#${side}-status-light`);
  const textEl = $(`#${side}-status-text`);
  light.classList.toggle("idle", !isBusy);
  light.classList.toggle("busy", isBusy);
  textEl.textContent = text;
}

function renderMeetingStatus(meeting) {
  const name = $("#sidebar-meeting-name");
  const meta = $("#sidebar-meeting-meta");
  const tip = $("#selected-meeting-tip");
  const summaryBadge = $("#badge-summary");
  const topicsBadge = $("#badge-topics");

  if (!meeting) {
    name.textContent = "当前会议：未选择";
    meta.textContent = "请从左侧选择一个会议开始处理。";
    tip.textContent = "未选择会议";
    summaryBadge.textContent = "未生成总结";
    topicsBadge.textContent = "未生成主题 JSON";
    summaryBadge.className = "badge muted";
    topicsBadge.className = "badge muted";
    return;
  }

  name.textContent = `当前会议：${meeting.name}`;
  meta.textContent =
    `ID: ${meeting.id} · 导入时间：${meeting.created_at || "未知"} · 原始文件：` +
    `${meeting.original_filename || meeting.transcript_filename || "未知"}`;
  tip.textContent = `当前处理会议：${meeting.name} (${meeting.id})`;
  summaryBadge.textContent = meeting.has_summary ? "已生成总结" : "未生成总结";
  topicsBadge.textContent = meeting.has_topics ? "已生成主题 JSON" : "未生成主题 JSON";
  summaryBadge.className = meeting.has_summary ? "badge" : "badge muted";
  topicsBadge.className = meeting.has_topics ? "badge" : "badge muted";
}

function refreshActionButtons() {
  const canProcess = Boolean(state.meetingId) && !state.processing && !state.guideBusy;
  const currentMeeting = meetingById(state.meetingId);
  $("#btn-process").disabled = !canProcess;
  $("#btn-process").textContent = state.processing
    ? "总结中"
    : state.guideBusy
      ? "等待"
      : currentMeeting?.has_summary
        ? "重总结"
        : "总结";

  const canEditResult = Boolean(state.meetingId) && !state.processing && !state.guideBusy;
  $("#btn-toggle-result-edit").disabled = !canEditResult;

  const resource = state.rightResource;
  const canEditSide = Boolean(resource?.editable) && !state.processing && !state.guideBusy;
  $("#btn-toggle-side-edit").disabled = !canEditSide;

  updateGuideButton(resource);
}

function setProcessGuideEditMode(editMode) {
  state.processGuideEditMode = editMode;
  const editor = $("#process-guide-editor");
  const button = $("#btn-process-guide-edit");
  editor.readOnly = !editMode;
  editor.classList.toggle("is-editing", editMode);
  button.textContent = editMode ? "保存" : "编辑";
}

function syncProcessGuideConfirmLabel() {
  const meeting = meetingById(state.meetingId);
  $("#btn-process-guide-confirm").textContent = meeting?.has_summary ? "重总结" : "确认";
}

function renderSettingsKeyOptions() {
  const draft = state.settingsDraft;
  const select = $("#cfg-key-select");
  select.innerHTML = "";

  (draft?.api_profiles || []).forEach((item) => {
    const option = document.createElement("option");
    option.value = item.name;
    option.textContent = item.model_name || item.name;
    select.appendChild(option);
  });

  if (draft?.active_api_profile_name) {
    select.value = draft.active_api_profile_name;
  }

  const current = draft?.api_profiles?.find((item) => item.name === draft.active_api_profile_name);
  $("#cfg-current-model").value = current?.model_name || "";
  $("#cfg-max-tokens").value = current?.max_tokens || 64000;
  $("#btn-key-delete").disabled = (draft?.api_profiles?.length || 0) <= 1;
}

function loadSettingsDraft(cfg) {
  state.settingsDraft = cloneSettingsDraft(cfg);
  renderSettingsKeyOptions();
}

async function persistSettingsDraft() {
  const payload = cloneSettingsDraft(state.settingsDraft || {});
  if (!payload.api_profiles.length) {
    throw new Error("至少保留一个模型配置");
  }
  await api("/api/settings", {
    method: "PUT",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(payload),
  });
}

function showReparseGuidePrompt() {
  $("#reparse-guide-notes").value = "";
  $("#reparse-guide-prompt").hidden = false;
  $("#reparse-guide-notes").focus();
}

function hideReparseGuidePrompt() {
  $("#reparse-guide-prompt").hidden = true;
}

function resetReparseModalProgress() {
  $("#reparse-stream-title").textContent = "正在重新解析模板说明...";
  $("#reparse-stream-content").textContent = "";
}

function openStandaloneReparseModal() {
  $("#reparse-modal-title").textContent = `模板说明补充 · ${state.templateName}`;
  $("#reparse-modal-subtitle").textContent = "可为空；会和系统解析模板一起用于重新解析";
  $("#reparse-modal-notes").value = "";
  $("#reparse-modal-form").hidden = false;
  $("#reparse-modal-progress").hidden = true;
  $("#btn-reparse-modal-cancel").disabled = false;
  $("#btn-reparse-modal-confirm").disabled = false;
  resetReparseModalProgress();
  openModal("modal-reparse-guide");
  $("#reparse-modal-notes").focus();
}

function setStandaloneReparseProcessing(active) {
  $("#reparse-modal-form").hidden = active;
  $("#reparse-modal-progress").hidden = !active;
  $("#btn-reparse-modal-cancel").disabled = active;
  $("#btn-reparse-modal-confirm").disabled = active;
}

function pushStandaloneReparseLine(text) {
  const box = $("#reparse-stream-content");
  const lines = box.textContent ? box.textContent.split("\n") : [];
  lines.push(text);
  box.textContent = lines.slice(-6).join("\n");
}

async function streamTemplateGuideReparse(templateName, userNotes = "", handlers = {}) {
  const params = new URLSearchParams();
  if (userNotes.trim()) {
    params.set("user_notes", userNotes.trim());
  }
  const suffix = params.toString() ? `?${params.toString()}` : "";
  const source = new EventSource(
    `/api/templates/${encodeURIComponent(templateName)}/guide/reparse/stream${suffix}`,
  );

  try {
    const result = await new Promise((resolve, reject) => {
      let contentAcc = "";

      source.onmessage = (event) => {
        if (!event.data) {
          return;
        }
        const payload = JSON.parse(event.data);
        if (payload.type === "status") {
          handlers.onStatus?.(payload.data);
          return;
        }
        if (payload.type === "chunk") {
          const chunk = payload.data?.text || "";
          if (chunk) {
            contentAcc += chunk;
            handlers.onChunk?.(chunk, contentAcc, payload.data);
          }
          return;
        }
        if (payload.type === "done") {
          resolve(payload.data || { name: templateName, content: contentAcc });
          return;
        }
        if (payload.type === "error") {
          reject(new Error(payload.data || "解析失败"));
        }
      };

      source.onerror = () => {
        reject(new Error("解析连接中断"));
      };
    });

    state.templates = state.templates.map((item) => (
      item.name === templateName ? { ...item, has_guide: true } : item
    ));
    if (state.rightResource?.name === templateName && state.rightResource.type === "template") {
      state.rightResource.hasGuide = true;
    }
    await refreshRightResourceAfterGuideReparse(templateName, result.content || "");
    return result;
  } finally {
    source.close();
  }
}

async function runStandaloneGuideReparseFlow() {
  const templateName = state.templateName;
  const userNotes = $("#reparse-modal-notes").value || "";

  state.guideBusy = true;
  setStatus("right", true, "解析中");
  setStandaloneReparseProcessing(true);
  resetReparseModalProgress();
  pushStandaloneReparseLine(`模板：${templateName}`);
  pushStandaloneReparseLine("已提交重解析请求，正在准备说明...");
  refreshActionButtons();

  try {
    const params = new URLSearchParams();
    if (userNotes.trim()) {
      params.set("user_notes", userNotes.trim());
    }
    const source = new EventSource(
      `/api/templates/${encodeURIComponent(templateName)}/guide/reparse/stream?${params.toString()}`,
    );

    const result = await new Promise((resolve, reject) => {
      let contentAcc = "";

      source.onmessage = (event) => {
        if (!event.data) {
          return;
        }
        const payload = JSON.parse(event.data);
        if (payload.type === "status") {
          $("#reparse-stream-title").textContent = "正在重新解析模板说明...";
          pushStandaloneReparseLine("已连接模型，开始解析...");
          return;
        }
        if (payload.type === "chunk") {
          const chunk = payload.data?.text || "";
          if (chunk) {
            contentAcc += chunk;
            $("#reparse-stream-content").textContent = contentAcc.replace(/\r\n/g, "\n").split("\n").slice(-8).join("\n");
          }
          return;
        }
        if (payload.type === "done") {
          source.close();
          resolve(payload.data || { name: templateName, content: contentAcc });
          return;
        }
        if (payload.type === "error") {
          source.close();
          reject(new Error(payload.data || "解析失败"));
        }
      };

      source.onerror = () => {
        source.close();
        reject(new Error("解析连接中断"));
      };
    });

    state.templates = state.templates.map((item) => (
      item.name === templateName ? { ...item, has_guide: true } : item
    ));
    if (state.rightResource?.name === templateName && state.rightResource.type === "template") {
      state.rightResource.hasGuide = true;
    }
    await refreshRightResourceAfterGuideReparse(templateName, result.content || "");
    closeModal("modal-reparse-guide");
    await openProcessGuideModal();
    $("#process-guide-editor").value = result.content || "";
  } finally {
    state.guideBusy = false;
    setStatus("right", false, "空闲");
    setStandaloneReparseProcessing(false);
    refreshActionButtons();
  }
}

async function refreshRightResourceAfterGuideReparse(templateName, content) {
  const resource = state.rightResource;
  if (!resource) {
    return;
  }

  const isTargetGuide = resource.type === "template-guide" && resource.templateName === templateName;
  const isTargetTemplate = resource.type === "template" && resource.name === templateName;
  if (!isTargetGuide && !isTargetTemplate) {
    return;
  }

  if (isTargetGuide) {
    resource.content = content;
    $("#side-editor").value = content;
    if (!state.rightEditMode) {
      renderSidePreview(resource);
    }
    return;
  }

  const treeKey = resource.treeKey || `file:template_guides/${templateName}`;
  await openTemplateGuide(templateName, treeKey);
}

function resetProcessingStream() {
  $("#stream-box").style.display = "none";
  $("#stream-title").textContent = "";
  $("#stream-content").textContent = "";
  setStatus("left", false, "空闲");
}

function showResultEmpty() {
  state.resultEditMode = false;
  $("#btn-toggle-result-edit").textContent = "编辑";
  $("#result-editor").style.display = "none";
  $("#result-md").style.display = "none";
  $("#processing-indicator").hidden = true;
  $("#result-empty").hidden = false;
  refreshActionButtons();
}

function setResultEditMode(editMode) {
  state.resultEditMode = editMode;
  $("#result-editor").style.display = editMode ? "block" : "none";
  $("#result-md").style.display = editMode ? "none" : "block";
  $("#btn-toggle-result-edit").textContent = editMode ? "保存" : "编辑";
}

function showResult(markdown) {
  resetProcessingStream();
  $("#processing-indicator").hidden = true;
  $("#result-empty").hidden = true;
  $("#result-editor").value = markdown;
  $("#result-md").innerHTML = marked.parse(markdown || "");
  $("#result-md").scrollTop = 0;
  setResultEditMode(false);
  refreshActionButtons();
}

function showProcessingView() {
  $("#result-empty").hidden = true;
  $("#result-editor").style.display = "none";
  $("#result-md").style.display = "none";
  $("#processing-indicator").hidden = false;
}

function setSelectedTreeKey(key) {
  state.selectedTreeKey = key;
  $$(".tree-row").forEach((row) => {
    row.classList.toggle("selected", row.dataset.nodeKey === key);
    row.classList.toggle("active-meeting", row.dataset.meetingId === state.meetingId);
  });
}

async function setCurrentMeeting(meetingId) {
  const data = await api("/api/current-meeting", {
    method: "PUT",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({ meeting_id: meetingId }),
  });
  state.meetingId = data.active_meeting_id;
  renderMeetingStatus(data.meeting);
  setSelectedTreeKey(state.selectedTreeKey);
  refreshActionButtons();
}

function renderNode(node, parent, depth) {
  const wrapper = document.createElement("div");
  wrapper.className = "tree-node";

  const row = document.createElement("div");
  row.className = "tree-row";
  row.style.paddingLeft = `${10 + depth * 18}px`;

  if (node.id) {
    row.dataset.meetingId = node.id;
  }

  if (node.type === "folder") {
    const arrow = document.createElement("span");
    arrow.className = `arrow ${node.children?.length ? "" : "none"}`;
    arrow.textContent = "▸";
    row.appendChild(arrow);

    const icon = document.createElement("span");
    icon.className = "icon";
    icon.textContent = node.id ? "📁" : "🗂";
    row.appendChild(icon);

    const label = document.createElement("span");
    label.className = "label";
    label.textContent = node.name;
    row.appendChild(label);

    if (node.active) {
      const pin = document.createElement("span");
      pin.className = "meeting-pin";
      pin.textContent = "当前";
      row.appendChild(pin);
    }

    if (node.id) {
      row.dataset.nodeKey = `meeting:${node.id}`;
      const del = document.createElement("span");
      del.className = "del-btn";
      del.textContent = "删除";
      del.addEventListener("click", async (event) => {
        event.stopPropagation();
        await deleteMeetingNode(node.id, node.delete_mode || "meeting");
      });
      row.appendChild(del);
    } else {
      row.dataset.nodeKey = `folder:${node.name}`;
    }

    row.addEventListener("click", async () => {
      const children = wrapper.querySelector(":scope > .tree-children");
      if (children) {
        const isOpen = !children.classList.contains("open");
        children.classList.toggle("open", isOpen);
        arrow.classList.toggle("expanded", isOpen);
      }
      if (node.id) {
        await selectMeeting(node.id);
      } else {
        setSelectedTreeKey(row.dataset.nodeKey);
      }
    });
  } else {
    row.dataset.nodeKey = `file:${node.path}`;

    const spacer = document.createElement("span");
    spacer.className = "arrow none";
    row.appendChild(spacer);

    const icon = document.createElement("span");
    icon.className = "icon";
    if (node.name.endsWith(".md")) {
      icon.textContent = "📝";
    } else if (node.name.endsWith(".json")) {
      icon.textContent = "🧩";
    } else if (node.name.endsWith(".yaml") || node.name.endsWith(".yml")) {
      icon.textContent = "⚙️";
    } else {
      icon.textContent = "📄";
    }
    row.appendChild(icon);

    const label = document.createElement("span");
    label.className = "label";
    label.textContent = node.name;
    row.appendChild(label);

    if (node.delete_mode === "template") {
      const del = document.createElement("span");
      del.className = "del-btn";
      del.textContent = "删除";
      del.addEventListener("click", async (event) => {
        event.stopPropagation();
        await deleteTemplateNode(node.name);
      });
      row.appendChild(del);
    }

    row.addEventListener("click", async () => {
      await openTreeResource(node.path);
    });
  }

  wrapper.appendChild(row);

  if (node.children?.length) {
    const children = document.createElement("div");
    children.className = `tree-children ${node.active ? "open" : ""}`;
    if (node.active) {
      row.querySelector(".arrow")?.classList.add("expanded");
    }
    node.children.forEach((child) => renderNode(child, children, depth + 1));
    wrapper.appendChild(children);
  }

  parent.appendChild(wrapper);
}

function buildTree(tree) {
  const root = $("#file-tree");
  root.innerHTML = "";
  (tree.children || []).forEach((child) => renderNode(child, root, 0));
  setSelectedTreeKey(state.selectedTreeKey);
}

async function loadTree() {
  const tree = await api("/api/tree");
  buildTree(tree);
}

async function loadMeetingSummary(meetingId) {
  const result = await api(`/api/meetings/${meetingId}/file/meeting_summary.md`);
  showResult(result.content);
}

async function selectMeeting(meetingId) {
  if (state.processing || state.guideBusy) {
    return;
  }
  await setCurrentMeeting(meetingId);
  setSelectedTreeKey(`meeting:${meetingId}`);

  try {
    await loadMeetingSummary(meetingId);
  } catch {
    showResultEmpty();
  }
}

function renderSidePreview(resource) {
  $("#side-editor").style.display = "none";
  $("#side-preview").style.display = "none";
  $("#side-plain-preview").style.display = "none";

  if (!resource) {
    $("#side-plain-preview").style.display = "block";
    $("#side-plain-preview").textContent = "请选择一个资源";
    return;
  }

  if (isMarkdownFile(resource.name)) {
    $("#side-preview").style.display = "block";
    $("#side-preview").innerHTML = marked.parse(resource.content || "");
    return;
  }

  $("#side-plain-preview").style.display = "block";
  $("#side-plain-preview").textContent = resource.content || "";
}

function syncTemplateSelection(name) {
  state.templateName = name;
  savePreferences({ templateName: name });
  $("#tpl-select").value = name;
}

function updateGuideButton(resource) {
  const button = $("#btn-reparse-guide");
  const isTemplateResource = resource && (resource.type === "template" || resource.type === "template-guide");

  if (!isTemplateResource) {
    button.disabled = true;
    button.textContent = "解析";
    return;
  }

  const hasGuide = resource.type === "template-guide" || Boolean(resource.hasGuide);
  button.textContent = state.guideBusy ? (hasGuide ? "重解析中" : "解析中") : hasGuide ? "重解析" : "解析";
  button.disabled = state.guideBusy || state.processing;
}

function applyRightResource(resource) {
  state.rightResource = resource;
  $("#editor-resource-label").textContent = `当前资源：${resource.label}`;
  $("#side-editor").value = resource.content || "";
  $("#btn-toggle-side-edit").textContent = resource.editable ? "编辑" : "只读";
  state.rightEditMode = false;
  renderSidePreview(resource);

  if (resource.type === "template" || resource.type === "template-guide") {
    syncTemplateSelection(resource.templateName || resource.name);
  }

  refreshActionButtons();
}

function setRightEditMode(editMode) {
  state.rightEditMode = editMode;
  const resource = state.rightResource;
  if (!resource || !resource.editable) {
    renderSidePreview(resource);
    return;
  }

  $("#btn-toggle-side-edit").textContent = editMode ? "保存" : "编辑";
  if (editMode) {
    $("#side-preview").style.display = "none";
    $("#side-plain-preview").style.display = "none";
    $("#side-editor").style.display = "block";
  } else {
    resource.content = $("#side-editor").value;
    renderSidePreview(resource);
  }
}

async function openRightResource(resource) {
  applyRightResource(resource);
  if (resource.treeKey) {
    setSelectedTreeKey(resource.treeKey);
  }
}

async function openTemplate(name, treeKey = `file:templates/${name}`) {
  const data = await api(`/api/templates/${encodeURIComponent(name)}`);
  await openRightResource({
    type: "template",
    name,
    templateName: name,
    label: `模板 / ${name}`,
    content: data.content,
    hasGuide: Boolean(data.has_guide),
    editable: true,
    treeKey,
  });
}

async function openTemplateGuide(name, treeKey = `file:template_guides/${name}`) {
  const data = await api(`/api/templates/${encodeURIComponent(name)}/guide`);
  await openRightResource({
    type: "template-guide",
    name,
    templateName: name,
    label: `模板说明 / ${name}`,
    content: data.content,
    hasGuide: true,
    editable: true,
    treeKey,
  });
}

async function openPrompt(name, treeKey = `file:prompts/${name}`) {
  const data = await api(`/api/prompts/${encodeURIComponent(name)}`);
  await openRightResource({
    type: "prompt",
    name,
    label: `提示词 / ${name}`,
    content: data.content,
    editable: true,
    treeKey,
  });
}

async function openMeetingFile(meetingId, filename, treeKey = `file:meetings/${meetingId}/${filename}`) {
  const data = await api(`/api/meetings/${meetingId}/file/${encodeURIComponent(filename)}`);
  await openRightResource({
    type: "meeting-file",
    meetingId,
    name: filename,
    label: `会议原文 / ${meetingById(meetingId)?.name || meetingId} / ${filename}`,
    content: data.content,
    editable: false,
    treeKey,
  });
}

async function openResultFile(meetingId, filename, treeKey) {
  const data = await api(`/api/meetings/${meetingId}/file/${encodeURIComponent(filename)}`);
  await openRightResource({
    type: "result-file",
    meetingId,
    name: filename,
    label: `处理结果 / ${meetingById(meetingId)?.name || meetingId} / ${filename}`,
    content: data.content,
    editable: false,
    treeKey,
  });
}

async function openTreeResource(path) {
  if (state.processing || state.guideBusy) {
    return;
  }

  const parts = path.split("/");
  const group = parts[0];
  const treeKey = `file:${path}`;

  if (group === "templates") {
    await openTemplate(parts.slice(1).join("/"), treeKey);
    return;
  }
  if (group === "prompts") {
    await openPrompt(parts.slice(1).join("/"), treeKey);
    return;
  }
  if (group === "template_guides") {
    await openTemplateGuide(parts.slice(1).join("/"), treeKey);
    return;
  }

  const meetingId = parts[1];
  const filename = parts.slice(2).join("/");
  await setCurrentMeeting(meetingId);

  if (group === "results_md" && filename === "meeting_summary.md") {
    setSelectedTreeKey(treeKey);
    await loadMeetingSummary(meetingId);
    return;
  }
  if (group === "meetings") {
    await openMeetingFile(meetingId, filename, treeKey);
    return;
  }
  if (group === "results_json" || group === "results_md") {
    await openResultFile(meetingId, filename, treeKey);
  }
}

async function deleteMeetingNode(meetingId, deleteMode) {
  const isDeleteMeeting = deleteMode === "meeting";
  const confirmMessage = isDeleteMeeting
    ? "确定删除该会议原文及其全部处理结果吗？"
    : "确定只删除该会议的处理结果吗？原文将保留。";

  if (!window.confirm(confirmMessage)) {
    return;
  }

  const endpoint = isDeleteMeeting
    ? `/api/meetings/${meetingId}`
    : `/api/meetings/${meetingId}/results`;

  await api(endpoint, { method: "DELETE" });
  toast(isDeleteMeeting ? "会议及处理结果已删除" : "处理结果已删除，原文已保留");
  await refresh();

  if (isDeleteMeeting && !meetingById(state.meetingId)) {
    showResultEmpty();
    return;
  }

  if (!isDeleteMeeting && state.meetingId === meetingId) {
    try {
      await loadMeetingSummary(meetingId);
    } catch {
      showResultEmpty();
    }
  }
}

async function deleteTemplateNode(name) {
  if (!window.confirm(`确定删除模板 ${name} 及其对应使用说明吗？`)) {
    return;
  }

  await api(`/api/templates/${encodeURIComponent(name)}`, { method: "DELETE" });
  toast(`模板已删除：${name}`);

  if (
    state.rightResource &&
    (state.rightResource.templateName === name || state.rightResource.name === name)
  ) {
    state.rightResource = null;
  }

  if (state.templateName === name) {
    state.templateName = "";
    savePreferences({ templateName: "" });
  }

  await refresh();
}

function initResize(gutterId, leftId, rightId) {
  const gutter = document.getElementById(gutterId);
  const left = document.getElementById(leftId);
  const right = document.getElementById(rightId);
  let dragging = false;
  let startX = 0;
  let startLeftW = 0;
  let startRightW = 0;

  gutter.addEventListener("mousedown", (event) => {
    if (window.innerWidth <= 1100) {
      return;
    }
    event.preventDefault();
    dragging = true;
    gutter.classList.add("dragging");
    startX = event.clientX;
    startLeftW = left.getBoundingClientRect().width;
    startRightW = right.getBoundingClientRect().width;
    document.body.style.cursor = "col-resize";
    document.body.style.userSelect = "none";
  });

  document.addEventListener("mousemove", (event) => {
    if (!dragging) {
      return;
    }

    const dx = event.clientX - startX;
    const minLeft = Number(left.dataset.minWidth || 220);
    const minRight = Number(right.dataset.minWidth || 320);
    let nextLeft = Math.max(minLeft, startLeftW + dx);
    let nextRight = startRightW - dx;

    if (nextRight < minRight) {
      nextRight = minRight;
      nextLeft = startLeftW + startRightW - minRight;
    }

    if (leftId === "sidebar") {
      left.style.flexBasis = `${nextLeft}px`;
      left.style.flexGrow = "0";
    } else {
      left.style.flexBasis = "0%";
      left.style.flexGrow = "1";
    }

    right.style.flexBasis = `${nextRight}px`;
    right.style.flexGrow = "0";
  });

  document.addEventListener("mouseup", () => {
    if (!dragging) {
      return;
    }
    dragging = false;
    gutter.classList.remove("dragging");
    document.body.style.cursor = "";
    document.body.style.userSelect = "";
    persistLayout();
  });
}

async function refresh() {
  const templateData = await api("/api/templates");
  state.templates = templateData;

  const select = $("#tpl-select");
  select.innerHTML = "";
  templateData.forEach((item) => {
    const option = document.createElement("option");
    option.value = item.name;
    option.textContent = item.name;
    select.appendChild(option);
  });

  if (!templateData.some((item) => item.name === state.templateName) && templateData[0]) {
    state.templateName = templateData[0].name;
  }
  if (state.templateName) {
    syncTemplateSelection(state.templateName);
  }

  const meetingsData = await api("/api/meetings");
  state.meetings = meetingsData.meetings || [];
  state.meetingId = meetingsData.active_meeting_id || null;

  await loadTree();
  renderMeetingStatus(meetingById(state.meetingId));

  if (state.meetingId) {
    try {
      await loadMeetingSummary(state.meetingId);
    } catch {
      showResultEmpty();
    }
  } else {
    showResultEmpty();
  }

  if (
    state.rightResource &&
    state.rightResource.type === "template" &&
    templateData.some((item) => item.name === state.rightResource.name)
  ) {
    await openTemplate(state.rightResource.name, state.rightResource.treeKey);
  } else if (
    state.rightResource &&
    state.rightResource.type === "template-guide" &&
    templateData.some((item) => item.name === state.rightResource.templateName)
  ) {
    await openTemplateGuide(state.rightResource.name, state.rightResource.treeKey);
  } else if (!state.rightResource && state.templateName) {
    await openTemplate(state.templateName);
  }

  refreshActionButtons();
}

async function ensureTemplateGuideBeforeProcess() {
  const templateMeta = templateMetaByName(state.templateName);
  if (templateMeta?.has_guide) {
    return;
  }

  toast("当前模板还没有解析说明，先为你解析模板。");
  state.guideBusy = true;
  setStatus("left", true, "解析中");
  refreshActionButtons();

  try {
    const result = await api(`/api/templates/${encodeURIComponent(state.templateName)}/guide/reparse`, {
      method: "POST",
    });
    state.templates = state.templates.map((item) => (
      item.name === state.templateName ? { ...item, has_guide: true } : item
    ));
    if (
      state.rightResource &&
      state.rightResource.templateName === result.name &&
      state.rightResource.type === "template"
    ) {
      state.rightResource.hasGuide = true;
      refreshActionButtons();
    }
  } finally {
    state.guideBusy = false;
    setStatus("left", false, "空闲");
    refreshActionButtons();
  }
}

async function loadTemplateGuideForProcess() {
  const data = await api(`/api/templates/${encodeURIComponent(state.templateName)}/guide`);
  $("#guide-modal-title").textContent = `模板说明 · ${state.templateName}`;
  $("#guide-modal-subtitle").textContent = "确认后开始总结，也可以先补充说明或重解析";
  $("#process-guide-editor").value = data.content || "";
  if (!$("#process-extra-notes").dataset.keepValue) {
    $("#process-extra-notes").value = "";
  }
  setProcessGuideEditMode(false);
  syncProcessGuideConfirmLabel();
}

async function saveProcessGuideFromModal() {
  const content = $("#process-guide-editor").value;
  await api(`/api/templates/${encodeURIComponent(state.templateName)}/guide`, {
    method: "PUT",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({ content }),
  });

  state.templates = state.templates.map((item) => (
    item.name === state.templateName ? { ...item, has_guide: true } : item
  ));

  if (
    state.rightResource &&
    state.rightResource.templateName === state.templateName &&
    state.rightResource.type === "template-guide"
  ) {
    state.rightResource.content = content;
  }
  if (
    state.rightResource &&
    state.rightResource.name === state.templateName &&
    state.rightResource.type === "template"
  ) {
    state.rightResource.hasGuide = true;
  }

  setProcessGuideEditMode(false);
  refreshActionButtons();
  toast("说明已保存");
}

async function openProcessGuideModal() {
  openModal("modal-process-guide");
  hideReparseGuidePrompt();
  $("#guide-modal-title").textContent = `模板说明 · ${state.templateName}`;
  $("#guide-modal-subtitle").textContent = "正在准备模板说明...";
  $("#process-guide-editor").value = "正在加载模板说明，请稍等...";
  $("#process-guide-editor").readOnly = true;
  $("#process-guide-editor").classList.remove("is-editing");
  $("#process-extra-notes").dataset.keepValue = "1";
  $("#btn-process-guide-edit").disabled = true;
  $("#btn-process-guide-reparse").disabled = true;
  $("#btn-process-guide-confirm").disabled = true;

  try {
    await ensureTemplateGuideBeforeProcess();
    await loadTemplateGuideForProcess();
  } catch (error) {
    closeModal("modal-process-guide");
    throw error;
  } finally {
    $("#btn-process-guide-edit").disabled = false;
    $("#btn-process-guide-reparse").disabled = false;
    $("#btn-process-guide-confirm").disabled = false;
    delete $("#process-extra-notes").dataset.keepValue;
  }
}

async function reparseTemplateGuideFromModal(userNotes = "") {
  const templateName = state.templateName;

  state.guideBusy = true;
  setStatus("right", true, "解析中");
  $("#btn-process-guide-edit").disabled = true;
  $("#btn-process-guide-reparse").disabled = true;
  $("#btn-process-guide-confirm").disabled = true;
  $("#guide-modal-subtitle").textContent = "正在结合补充说明重新解析模板...";
  refreshActionButtons();

  try {
    if (state.processGuideEditMode) {
      await saveProcessGuideFromModal();
    }

    const result = await runTemplateGuideReparse(templateName, userNotes);


    $("#process-guide-editor").value = result.content || "";
    $("#guide-modal-title").textContent = `模板说明 · ${templateName}`;
    $("#guide-modal-subtitle").textContent = "确认后开始总结，也可以先补充说明或重解析";
    setProcessGuideEditMode(false);

    toast(`说明已更新：${templateName}`);
  } finally {
    state.guideBusy = false;
    setStatus("right", false, "空闲");
    $("#btn-process-guide-edit").disabled = false;
    $("#btn-process-guide-reparse").disabled = false;
    $("#btn-process-guide-confirm").disabled = false;
    refreshActionButtons();
  }
}

async function runTemplateGuideReparse(templateName, userNotes = "") {
  return streamTemplateGuideReparse(templateName, userNotes, {
    onStatus() {
      $("#guide-modal-subtitle").textContent = "正在结合补充说明重新解析模板...";
    },
    onChunk(_chunk, contentAcc) {
      $("#process-guide-editor").value = contentAcc;
    },
  });
}

function startMeetingProcess(userNotes = "") {
  state.processing = true;
  setStatus("left", true, "总结中");
  refreshActionButtons();
  showProcessingView();
  $("#stream-box").style.display = "block";
  $("#stream-title").textContent = "第一阶段：结构化主题...";
  $("#stream-content").textContent = "";

  const params = new URLSearchParams({ template_name: state.templateName });
  if (userNotes.trim()) {
    params.set("user_notes", userNotes.trim());
  }

  const source = new EventSource(`/api/meetings/${state.meetingId}/process?${params.toString()}`);

  let resultAcc = "";
  let streamAcc = "";

  source.onmessage = async (event) => {
    if (!event.data) {
      return;
    }

    const payload = JSON.parse(event.data);

    if (payload.type === "status") {
      if (payload.data === "preprocessing") {
        $("#stream-title").textContent = "第一阶段：结构化主题...";
      } else if (payload.data === "preprocessing_done") {
        $("#stream-title").textContent = "主题提取完成，开始生成会议总结...";
      } else if (payload.data === "summarizing") {
        $("#stream-title").textContent = "第二阶段：生成会议总结...";
        streamAcc = "";
        $("#stream-content").textContent = "";
      }
      return;
    }

    if (payload.type === "chunk") {
      const { data } = payload;
      streamAcc += data.text || "";
      $("#stream-content").textContent = streamAcc.replace(/\r\n/g, "\n").split("\n").slice(-4).join("\n");
      if (data.stage === 2 && data.chunk_type === "content") {
        resultAcc += data.text || "";
      }
      return;
    }

    if (payload.type === "done") {
      source.close();
      state.processing = false;
      patchMeeting(state.meetingId, { has_summary: true });
      renderMeetingStatus(meetingById(state.meetingId));
      showResult(payload.data?.result || resultAcc || "");
      toast("会议总结完成");
      refreshActionButtons();
      return;
    }

    if (payload.type === "error") {
      source.close();
      state.processing = false;
      resetProcessingStream();
      $("#processing-indicator").hidden = true;
      refreshActionButtons();
      toast(`处理失败：${payload.data}`, "err");
    }
  };

  source.onerror = () => {
    source.close();
    state.processing = false;
    resetProcessingStream();
    $("#processing-indicator").hidden = true;
    refreshActionButtons();
    toast("处理连接中断", "err");
  };
}

$("#btn-process").addEventListener("click", async () => {
  if (!state.meetingId || state.processing || state.guideBusy) {
    return;
  }

  try {
    await openProcessGuideModal();
  } catch (error) {
    state.processing = false;
    state.guideBusy = false;
    setStatus("left", false, "空闲");
    refreshActionButtons();
    toast(error.message, "err");
  }
});

$("#btn-close-process-guide").addEventListener("click", () => {
  hideReparseGuidePrompt();
  closeModal("modal-process-guide");
});

$("#btn-process-guide-edit").addEventListener("click", async () => {
  if (state.processing || state.guideBusy) {
    return;
  }

  if (!state.processGuideEditMode) {
    setProcessGuideEditMode(true);
    return;
  }

  $("#btn-process-guide-edit").disabled = true;
  try {
    await saveProcessGuideFromModal();
  } catch (error) {
    toast(error.message, "err");
  } finally {
    $("#btn-process-guide-edit").disabled = false;
  }
});

$("#btn-process-guide-reparse").addEventListener("click", async () => {
  if (state.processing || state.guideBusy) {
    return;
  }

  $("#btn-process-guide-reparse").disabled = true;
  try {
    if (state.processGuideEditMode) {
      await saveProcessGuideFromModal();
    }
    hideReparseGuidePrompt();
    closeModal("modal-process-guide");
    openStandaloneReparseModal();
  } catch (error) {
    toast(error.message, "err");
  } finally {
    $("#btn-process-guide-reparse").disabled = false;
  }
});

$("#btn-reparse-guide-cancel").addEventListener("click", () => {
  hideReparseGuidePrompt();
});

$("#btn-reparse-guide-confirm").addEventListener("click", async () => {
  if (state.processing || state.guideBusy) {
    return;
  }

  $("#btn-reparse-guide-confirm").disabled = true;
  try {
    const userNotes = $("#reparse-guide-notes").value || "";
    await reparseTemplateGuideFromModal(userNotes);
    hideReparseGuidePrompt();
  } catch (error) {
    toast(error.message, "err");
  } finally {
    $("#btn-reparse-guide-confirm").disabled = false;
  }
});

$("#btn-close-reparse-guide").addEventListener("click", () => {
  if (state.guideBusy) {
    return;
  }
  closeModal("modal-reparse-guide");
});

$("#btn-reparse-modal-cancel").addEventListener("click", () => {
  if (state.guideBusy) {
    return;
  }
  closeModal("modal-reparse-guide");
});

$("#btn-reparse-modal-confirm").addEventListener("click", async () => {
  if (state.processing || state.guideBusy) {
    return;
  }

  try {
    await runStandaloneGuideReparseFlow();
  } catch (error) {
    toast(error.message, "err");
  }
});

$("#btn-process-guide-confirm").addEventListener("click", async () => {
  if (!state.meetingId || state.processing || state.guideBusy) {
    return;
  }

  $("#btn-process-guide-confirm").disabled = true;
  try {
    if (state.processGuideEditMode) {
      await saveProcessGuideFromModal();
    }
    const userNotes = $("#process-extra-notes").value || "";
    closeModal("modal-process-guide");
    startMeetingProcess(userNotes);
  } catch (error) {
    toast(error.message, "err");
  } finally {
    $("#btn-process-guide-confirm").disabled = false;
  }
});

$("#btn-toggle-result-edit").addEventListener("click", async () => {
  if (!state.meetingId || state.processing || state.guideBusy) {
    return;
  }

  if (!state.resultEditMode) {
    setResultEditMode(true);
    return;
  }

  const content = $("#result-editor").value;
  $("#btn-toggle-result-edit").disabled = true;
  await api(`/api/meetings/${state.meetingId}/summary`, {
    method: "PUT",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({ content }),
  });
  patchMeeting(state.meetingId, { has_summary: true });
  renderMeetingStatus(meetingById(state.meetingId));
  showResult(content);
  toast("结果已保存");
});

$("#btn-toggle-side-edit").addEventListener("click", async () => {
  const resource = state.rightResource;
  if (!resource || !resource.editable || state.processing || state.guideBusy) {
    return;
  }

  if (!state.rightEditMode) {
    setRightEditMode(true);
    return;
  }

  const content = $("#side-editor").value;
  $("#btn-toggle-side-edit").disabled = true;

  if (resource.type === "template") {
    await api(`/api/templates/${encodeURIComponent(resource.name)}`, {
      method: "PUT",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ content }),
    });
  } else if (resource.type === "template-guide") {
    await api(`/api/templates/${encodeURIComponent(resource.templateName)}/guide`, {
      method: "PUT",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ content }),
    });
  } else if (resource.type === "prompt") {
    await api(`/api/prompts/${encodeURIComponent(resource.name)}`, {
      method: "PUT",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ content }),
    });
  }

  resource.content = content;
  setRightEditMode(false);
  toast("资源已保存");
  refreshActionButtons();
});

$("#tpl-select").addEventListener("change", async (event) => {
  syncTemplateSelection(event.target.value);
  await openTemplate(event.target.value);
});

$("#btn-reparse-guide").addEventListener("click", async () => {
  const resource = state.rightResource;
  if (!resource || (resource.type !== "template" && resource.type !== "template-guide")) {
    return;
  }
  if (state.processing || state.guideBusy) {
    return;
  }

  const templateName = resource.templateName || resource.name;
  syncTemplateSelection(templateName);

  openStandaloneReparseModal();
});

renderMeetingStatus = function(meeting) {
  const name = $("#sidebar-meeting-name");
  const meta = $("#sidebar-meeting-meta");
  const tip = $("#selected-meeting-tip");
  const summaryBadge = $("#badge-summary");
  const topicsBadge = $("#badge-topics");

  if (!meeting) {
    name.textContent = "当前会议：未选择";
    meta.textContent = "请从左侧选择一个会议开始处理。";
    tip.textContent = "未选择会议";
    summaryBadge.textContent = "未生成总结";
    topicsBadge.textContent = "未生成主题 JSON";
    summaryBadge.className = "badge muted";
    topicsBadge.className = "badge muted";
    return;
  }

  name.textContent = `当前会议：${meeting.name}`;
  meta.textContent =
    `ID: ${meeting.id} · 导入时间：${meeting.created_at || "未知"} · 原始文件：` +
    `${meeting.original_filename || meeting.transcript_filename || "未知"}`;
  tip.textContent = `当前处理会议：${meeting.name} (${meeting.id})`;
  summaryBadge.textContent = meeting.has_summary ? "已生成总结" : "未生成总结";
  topicsBadge.textContent = meeting.has_topics ? "已生成主题 JSON" : "未生成主题 JSON";
  summaryBadge.className = meeting.has_summary ? "badge" : "badge muted";
  topicsBadge.className = meeting.has_topics ? "badge" : "badge muted";
};

refreshActionButtons = function() {
  const canProcess = Boolean(state.meetingId) && !state.processing && !state.guideBusy;
  const currentMeeting = meetingById(state.meetingId);
  $("#btn-process").disabled = !canProcess;
  $("#btn-process").textContent = state.processing
    ? "总结中"
    : state.guideBusy
      ? "等待"
      : currentMeeting?.has_summary
        ? "重总结"
        : "总结";

  const canEditResult = Boolean(state.meetingId) && !state.processing && !state.guideBusy;
  $("#btn-toggle-result-edit").disabled = !canEditResult;

  const resource = state.rightResource;
  const canEditSide = Boolean(resource?.editable) && !state.processing && !state.guideBusy;
  $("#btn-toggle-side-edit").disabled = !canEditSide;

  updateGuideButton(resource);
};

setProcessGuideEditMode = function(editMode) {
  state.processGuideEditMode = editMode;
  const editor = $("#process-guide-editor");
  const button = $("#btn-process-guide-edit");
  editor.readOnly = !editMode;
  editor.classList.toggle("is-editing", editMode);
  button.textContent = editMode ? "保存" : "编辑";
};

syncProcessGuideConfirmLabel = function() {
  const meeting = meetingById(state.meetingId);
  $("#btn-process-guide-confirm").textContent = meeting?.has_summary ? "重总结" : "确认";
};

persistSettingsDraft = async function() {
  const payload = cloneSettingsDraft(state.settingsDraft || {});
  if (!payload.api_profiles.length) {
    throw new Error("至少保留一个模型配置");
  }
  await api("/api/settings", {
    method: "PUT",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(payload),
  });
};

resetReparseModalProgress = function() {
  $("#reparse-stream-title").textContent = "正在重新解析模板说明...";
  $("#reparse-stream-content").textContent = "";
};

openStandaloneReparseModal = function() {
  $("#reparse-modal-title").textContent = `模板说明补充 · ${state.templateName}`;
  $("#reparse-modal-subtitle").textContent = "可为空；会和系统解析模板一起用于重新解析";
  $("#reparse-modal-notes").value = "";
  $("#reparse-modal-form").hidden = false;
  $("#reparse-modal-progress").hidden = true;
  $("#btn-reparse-modal-cancel").disabled = false;
  $("#btn-reparse-modal-confirm").disabled = false;
  resetReparseModalProgress();
  openModal("modal-reparse-guide");
  $("#reparse-modal-notes").focus();
};

runStandaloneGuideReparseFlow = async function() {
  const templateName = state.templateName;
  const userNotes = $("#reparse-modal-notes").value || "";

  state.guideBusy = true;
  setStatus("right", true, "解析中");
  setStandaloneReparseProcessing(true);
  resetReparseModalProgress();
  pushStandaloneReparseLine(`模板：${templateName}`);
  pushStandaloneReparseLine("已提交重解析请求，正在准备说明...");
  refreshActionButtons();

  try {
    const params = new URLSearchParams();
    if (userNotes.trim()) {
      params.set("user_notes", userNotes.trim());
    }
    const source = new EventSource(
      `/api/templates/${encodeURIComponent(templateName)}/guide/reparse/stream?${params.toString()}`,
    );

    const result = await new Promise((resolve, reject) => {
      let contentAcc = "";

      source.onmessage = (event) => {
        if (!event.data) {
          return;
        }
        const payload = JSON.parse(event.data);
        if (payload.type === "status") {
          $("#reparse-stream-title").textContent = "正在重新解析模板说明...";
          pushStandaloneReparseLine("已连接模型，开始解析...");
          return;
        }
        if (payload.type === "chunk") {
          const chunk = payload.data?.text || "";
          if (chunk) {
            contentAcc += chunk;
            $("#reparse-stream-content").textContent = contentAcc
              .replace(/\r\n/g, "\n")
              .split("\n")
              .slice(-6)
              .join("\n");
          }
          return;
        }
        if (payload.type === "done") {
          source.close();
          resolve(payload.data || { name: templateName, content: contentAcc });
          return;
        }
        if (payload.type === "error") {
          source.close();
          reject(new Error(payload.data || "解析失败"));
        }
      };

      source.onerror = () => {
        source.close();
        reject(new Error("解析连接中断"));
      };
    });

    state.templates = state.templates.map((item) => (
      item.name === templateName ? { ...item, has_guide: true } : item
    ));
    if (state.rightResource?.name === templateName && state.rightResource.type === "template") {
      state.rightResource.hasGuide = true;
    }
    await refreshRightResourceAfterGuideReparse(templateName, result.content || "");
    closeModal("modal-reparse-guide");
    await openProcessGuideModal();
    $("#process-guide-editor").value = result.content || "";
  } finally {
    state.guideBusy = false;
    setStatus("right", false, "空闲");
    setStandaloneReparseProcessing(false);
    refreshActionButtons();
  }
};

resetProcessingStream = function() {
  $("#stream-box").style.display = "none";
  $("#stream-title").textContent = "";
  $("#stream-content").textContent = "";
  setStatus("left", false, "空闲");
};

ensureTemplateGuideBeforeProcess = async function() {
  const templateMeta = templateMetaByName(state.templateName);
  if (templateMeta?.has_guide) {
    return;
  }

  toast("当前模板还没有解析说明，先为你解析模板。");
  state.guideBusy = true;
  setStatus("left", true, "解析中");
  refreshActionButtons();

  try {
    const result = await api(`/api/templates/${encodeURIComponent(state.templateName)}/guide/reparse`, {
      method: "POST",
    });
    state.templates = state.templates.map((item) => (
      item.name === state.templateName ? { ...item, has_guide: true } : item
    ));
    if (
      state.rightResource &&
      state.rightResource.templateName === result.name &&
      state.rightResource.type === "template"
    ) {
      state.rightResource.hasGuide = true;
      refreshActionButtons();
    }
  } finally {
    state.guideBusy = false;
    setStatus("left", false, "空闲");
    refreshActionButtons();
  }
};

loadTemplateGuideForProcess = async function() {
  const data = await api(`/api/templates/${encodeURIComponent(state.templateName)}/guide`);
  $("#guide-modal-title").textContent = `模板说明 · ${state.templateName}`;
  $("#guide-modal-subtitle").textContent = "确认后开始总结，也可以先补充说明或重解析";
  $("#process-guide-editor").value = data.content || "";
  if (!$("#process-extra-notes").dataset.keepValue) {
    $("#process-extra-notes").value = "";
  }
  setProcessGuideEditMode(false);
  syncProcessGuideConfirmLabel();
};

saveProcessGuideFromModal = async function() {
  const content = $("#process-guide-editor").value;
  await api(`/api/templates/${encodeURIComponent(state.templateName)}/guide`, {
    method: "PUT",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({ content }),
  });

  state.templates = state.templates.map((item) => (
    item.name === state.templateName ? { ...item, has_guide: true } : item
  ));

  if (
    state.rightResource &&
    state.rightResource.templateName === state.templateName &&
    state.rightResource.type === "template-guide"
  ) {
    state.rightResource.content = content;
  }
  if (
    state.rightResource &&
    state.rightResource.name === state.templateName &&
    state.rightResource.type === "template"
  ) {
    state.rightResource.hasGuide = true;
  }

  setProcessGuideEditMode(false);
  refreshActionButtons();
  toast("说明已保存");
};

openProcessGuideModal = async function() {
  openModal("modal-process-guide");
  hideReparseGuidePrompt();
  $("#guide-modal-title").textContent = `模板说明 · ${state.templateName}`;
  $("#guide-modal-subtitle").textContent = "正在准备模板说明...";
  $("#process-guide-editor").value = "正在加载模板说明，请稍等...";
  $("#process-guide-editor").readOnly = true;
  $("#process-guide-editor").classList.remove("is-editing");
  $("#process-extra-notes").dataset.keepValue = "1";
  $("#btn-process-guide-edit").disabled = true;
  $("#btn-process-guide-reparse").disabled = true;
  $("#btn-process-guide-confirm").disabled = true;

  try {
    await ensureTemplateGuideBeforeProcess();
    await loadTemplateGuideForProcess();
  } catch (error) {
    closeModal("modal-process-guide");
    throw error;
  } finally {
    $("#btn-process-guide-edit").disabled = false;
    $("#btn-process-guide-reparse").disabled = false;
    $("#btn-process-guide-confirm").disabled = false;
    delete $("#process-extra-notes").dataset.keepValue;
  }
};

reparseTemplateGuideFromModal = async function(userNotes = "") {
  const templateName = state.templateName;

  state.guideBusy = true;
  setStatus("right", true, "解析中");
  $("#btn-process-guide-edit").disabled = true;
  $("#btn-process-guide-reparse").disabled = true;
  $("#btn-process-guide-confirm").disabled = true;
  $("#guide-modal-subtitle").textContent = "正在结合补充说明重新解析模板...";
  refreshActionButtons();

  try {
    if (state.processGuideEditMode) {
      await saveProcessGuideFromModal();
    }

    const result = await runTemplateGuideReparse(templateName, userNotes);
    $("#process-guide-editor").value = result.content || "";
    $("#guide-modal-title").textContent = `模板说明 · ${templateName}`;
    $("#guide-modal-subtitle").textContent = "确认后开始总结，也可以先补充说明或重解析";
    setProcessGuideEditMode(false);
    toast(`说明已更新：${templateName}`);
  } finally {
    state.guideBusy = false;
    setStatus("right", false, "空闲");
    $("#btn-process-guide-edit").disabled = false;
    $("#btn-process-guide-reparse").disabled = false;
    $("#btn-process-guide-confirm").disabled = false;
    refreshActionButtons();
  }
};

runTemplateGuideReparse = async function(templateName, userNotes = "") {
  return streamTemplateGuideReparse(templateName, userNotes, {
    onStatus() {
      $("#guide-modal-subtitle").textContent = "正在结合补充说明重新解析模板...";
    },
    onChunk(_chunk, contentAcc) {
      $("#process-guide-editor").value = contentAcc;
    },
  });
};

startMeetingProcess = function(userNotes = "") {
  state.processing = true;
  setStatus("left", true, "总结中");
  refreshActionButtons();
  showProcessingView();
  $("#stream-box").style.display = "block";
  $("#stream-title").textContent = "第一阶段：结构化主题...";
  $("#stream-content").textContent = "";

  const params = new URLSearchParams({ template_name: state.templateName });
  if (userNotes.trim()) {
    params.set("user_notes", userNotes.trim());
  }

  const source = new EventSource(`/api/meetings/${state.meetingId}/process?${params.toString()}`);

  let resultAcc = "";
  let streamAcc = "";

  source.onmessage = async (event) => {
    if (!event.data) {
      return;
    }

    const payload = JSON.parse(event.data);

    if (payload.type === "status") {
      if (payload.data === "preprocessing") {
        $("#stream-title").textContent = "第一阶段：结构化主题...";
      } else if (payload.data === "preprocessing_done") {
        $("#stream-title").textContent = "主题提取完成，开始生成会议总结...";
      } else if (payload.data === "summarizing") {
        $("#stream-title").textContent = "第二阶段：生成会议总结...";
        streamAcc = "";
        $("#stream-content").textContent = "";
      }
      return;
    }

    if (payload.type === "chunk") {
      const { data } = payload;
      streamAcc += data.text || "";
      $("#stream-content").textContent = streamAcc.replace(/\r\n/g, "\n").split("\n").slice(-4).join("\n");
      if (data.stage === 2 && data.chunk_type === "content") {
        resultAcc += data.text || "";
      }
      return;
    }

    if (payload.type === "done") {
      source.close();
      state.processing = false;
      patchMeeting(state.meetingId, { has_summary: true });
      renderMeetingStatus(meetingById(state.meetingId));
      showResult(payload.data?.result || resultAcc || "");
      toast("会议总结完成");
      refreshActionButtons();
      return;
    }

    if (payload.type === "error") {
      source.close();
      state.processing = false;
      resetProcessingStream();
      $("#processing-indicator").hidden = true;
      refreshActionButtons();
      toast(`处理失败：${payload.data}`, "err");
    }
  };

  source.onerror = () => {
    source.close();
    state.processing = false;
    resetProcessingStream();
    $("#processing-indicator").hidden = true;
    refreshActionButtons();
    toast("处理连接中断", "err");
  };
};

$("#btn-import").addEventListener("click", () => {
  $("#import-name").value = "";
  $("#import-file").value = "";
  openModal("modal-import");
});

$("#btn-import-template").addEventListener("click", () => {
  $("#import-template-name").value = "";
  $("#import-template-file").value = "";
  openModal("modal-import-template");
});

$("#btn-confirm-import").addEventListener("click", async () => {
  const name = $("#import-name").value.trim();
  const file = $("#import-file").files[0];
  if (!name) {
    toast("请填写会议名称", "err");
    return;
  }
  if (!file) {
    toast("请选择会议文件", "err");
    return;
  }

  const formData = new FormData();
  formData.append("name", name);
  formData.append("file", file);

  const result = await fetch("/api/meetings/import", { method: "POST", body: formData });
  if (!result.ok) {
    const detail = await result.json().catch(() => ({ detail: "Import failed" }));
    toast(`导入失败：${detail.detail}`, "err");
    return;
  }

  const payload = await result.json();
  closeModal("modal-import");
  toast(`已导入会议：${name}`);
  await refresh();
  await selectMeeting(payload.id);
});

$("#btn-confirm-import-template").addEventListener("click", async () => {
  const name = $("#import-template-name").value.trim();
  const file = $("#import-template-file").files[0];
  if (!name) {
    toast("请填写模板名称", "err");
    return;
  }
  if (!file) {
    toast("请选择模板文件", "err");
    return;
  }

  const formData = new FormData();
  formData.append("name", name);
  formData.append("file", file);

  const result = await fetch("/api/templates/import", { method: "POST", body: formData });
  if (!result.ok) {
    const detail = await result.json().catch(() => ({ detail: "Import failed" }));
    toast(`导入失败：${detail.detail}`, "err");
    return;
  }

  const payload = await result.json();
  closeModal("modal-import-template");
  toast(`已导入模板：${payload.name}`);
  await refresh();
  syncTemplateSelection(payload.name);
  await openTemplate(payload.name);
});

$("#btn-settings").addEventListener("click", async () => {
  try {
    const cfg = await api("/api/settings");
    loadSettingsDraft(cfg);
  } finally {
    openModal("modal-settings");
  }
});

$("#cfg-key-select").addEventListener("change", async (event) => {
  if (!state.settingsDraft) {
    return;
  }
  state.settingsDraft.active_api_profile_name = event.target.value;
  renderSettingsKeyOptions();
  try {
    await persistSettingsDraft();
    toast(`已切换模型：${$("#cfg-current-model").value}`);
  } catch (error) {
    toast(error.message, "err");
  }
});

$("#btn-save-settings").addEventListener("click", async () => {
  if (!state.settingsDraft) {
    return;
  }
  const currentName = $("#cfg-key-select").value;
  const maxTokens = Number($("#cfg-max-tokens").value || 64000);
  if (!Number.isFinite(maxTokens) || maxTokens < 1) {
    toast("max_tokens 必须大于 0", "err");
    return;
  }
  state.settingsDraft.api_profiles = state.settingsDraft.api_profiles.map((item) => (
    item.name === currentName ? { ...item, max_tokens: Math.floor(maxTokens) } : item
  ));
  try {
    await persistSettingsDraft();
    renderSettingsKeyOptions();
    toast(`已保存模型配置：${$("#cfg-current-model").value}`);
  } catch (error) {
    toast(error.message, "err");
  }
});

$("#btn-key-add").addEventListener("click", () => {
  $("#cfg-add-model-name").value = "";
  $("#cfg-add-base-url").value = "";
  $("#cfg-add-api-key").value = "";
  $("#cfg-add-max-tokens").value = "64000";
  openModal("modal-add-model");
});

$("#btn-confirm-add-model").addEventListener("click", async () => {
  if (!state.settingsDraft) {
    return;
  }
  const modelName = $("#cfg-add-model-name").value.trim();
  const apiBaseUrl = $("#cfg-add-base-url").value.trim();
  const apiKey = $("#cfg-add-api-key").value.trim();
  const maxTokens = Number($("#cfg-add-max-tokens").value || 64000);
  if (!modelName || !apiBaseUrl || !apiKey || !Number.isFinite(maxTokens) || maxTokens < 1) {
    toast("请完整填写模型配置", "err");
    return;
  }
  if (state.settingsDraft.api_profiles.some((item) => item.name === modelName)) {
    toast("模型名称已存在", "err");
    return;
  }

  state.settingsDraft.api_profiles.push({
    name: modelName,
    model_name: modelName,
    api_base_url: apiBaseUrl,
    api_key: apiKey,
    max_tokens: Math.floor(maxTokens),
  });
  state.settingsDraft.active_api_profile_name = modelName;
  renderSettingsKeyOptions();

  try {
    await persistSettingsDraft();
    closeModal("modal-add-model");
    toast(`已新增模型：${modelName}`);
  } catch (error) {
    toast(error.message, "err");
  }
});

$("#btn-key-delete").addEventListener("click", async () => {
  if (!state.settingsDraft || state.settingsDraft.api_profiles.length <= 1) {
    return;
  }
  const targetName = $("#cfg-key-select").value;
  state.settingsDraft.api_profiles = state.settingsDraft.api_profiles.filter((item) => item.name !== targetName);
  state.settingsDraft.active_api_profile_name = state.settingsDraft.api_profiles[0]?.name || "";
  renderSettingsKeyOptions();

  try {
    await persistSettingsDraft();
    toast(`已删除模型：${targetName}`);
  } catch (error) {
    toast(error.message, "err");
  }
});

$$("[data-close]").forEach((button) => {
  button.addEventListener("click", () => closeModal(button.dataset.close));
});

["modal-import", "modal-import-template", "modal-settings", "modal-add-model", "modal-process-guide", "modal-reparse-guide"].forEach((id) => {
  document.getElementById(id).addEventListener("click", (event) => {
    if (event.target.id === id) {
      if (id === "modal-reparse-guide" && state.guideBusy) {
        return;
      }
      closeModal(id);
    }
  });
});

document.addEventListener("DOMContentLoaded", async () => {
  $("#sidebar").dataset.minWidth = "260";
  $("#result-panel").dataset.minWidth = "360";
  $("#template-panel").dataset.minWidth = "520";

  applySavedLayout();
  initResize("gutter-1", "sidebar", "result-panel");
  initResize("gutter-2", "result-panel", "template-panel");
  setStatus("left", false, "空闲");
  setStatus("right", false, "空闲");

  try {
    await refresh();
  } catch (error) {
    toast(error.message, "err");
  }
});