// src/genesis/server/static/chat.js
// Genesis Chat UI 涓氬姟閫昏緫锛坴1 鎷嗗垎鑷師 chat.html 鍐呰仈 <script> 娈碉紝琛?510-1179锛塦n// 涓婁竴杞?chat.html 鎷嗗垎 CSS 鏃惰鍒犳暣娈靛唴鑱?JS锛屽鑷存墍鏈?UI 鎸夐挳澶辨晥
// 鏈瀹屾暣鎭㈠锛岄浂琛屼负鍙樻洿
let sid = null;
let progressWs = null;
let draftProject = null;     // 涓嬩竴绌虹櫧浼氳瘽灏嗙粦瀹?宸茬粦鐨勯」鐩紙鍘?currentProject锛?let activeProject = null;    // 褰撳墠宸茶惤搴撲細璇濈粦瀹氱殑椤圭洰锛堟潵鑷悗绔級
let projects = [];
let drawerOpen = false;
let drawerSelected = null;   // 褰撳墠鎶藉眽涓紪杈戠殑椤圭洰鍚嶏紙null = 鏂板缓妯″紡锛?let lastTriggerEl = null;    // 鎵撳紑鎶藉眽/涓嬫媺鍓嶇殑鐒︾偣鍏冪礌锛圕1锛?let drawerDirty = false;     // 鎶藉眽琛ㄥ崟鏄惁鏈夋湭淇濆瓨鏀瑰姩锛圔6锛?  let drawerSnapshot = null;   // loadDrawerForm 鏃剁殑瀛楁蹇収锛圔6锛?
// 鐘舵€侀€昏緫缁熶竴璧?chat_state.js锛涜嫢闈欐€佽矾鐢辨湭灏辩华鍒欏洖閫€鍐呰仈瀹炵幇锛岄伩鍏嶆暣椤佃剼鏈穿婧?const GenesisState = window.GenesisState || {
  autoBindProject: (d, p) => (d === null && p.length ? p[0].name : (d && !p.find(x => x.name === d) ? (p.length ? p[0].name : null) : d)),
  shouldHideUploadSelect: () => false,
  resolveUploadType: (_a, _d, v) => v,
  computeDrawerSnapshot: (f) => f.map(x => (x == null ? '' : String(x)).trim()).join(String.fromCharCode(1)),
  isDrawerDirty: (n, s) => n !== s,
  buildWelcome: (d) => d === null ? '璇锋柊寤洪」鐩垨鑰呴€夋嫨椤圭洰'
    : '浣犲ソ锛佹垜鏄?Genesis 姒傝璁捐涔︾敓鎴?Agent銆傝鍏堜笂浼犺浠跺畾涔?xlsx锛堟ā鏉?瑙勫垯/浠ｇ爜搴撳凡鐢遍」鐩€? + d + '銆嶆彁渚涳級銆?,
};

const chatEl = document.getElementById('chat');
const inputEl = document.getElementById('input');
const sendBtn = document.getElementById('send');
const badge = document.getElementById('sid-badge');
const psMenu = document.getElementById('ps-menu');
const psName = document.getElementById('ps-name');
const drawer = document.getElementById('proj-drawer');

function addMsg(role, html) {
  const m = document.createElement('div');
  m.className = 'msg ' + role;
  m.innerHTML = '<div class="bubble">' + html + '</div>';
  chatEl.appendChild(m);
  chatEl.scrollTop = chatEl.scrollHeight;
  return m;
}
function esc(s) { return String(s).replace(/[&<>"']/g, c => ({'&':'&amp;','<':'&lt;','>':'&gt;','"':'&quot;',"'":'&#39;'}[c])); }
function showTyping() { return addMsg('assistant', '<span class="typing">鎬濊€冧腑鈥?/span>'); }

async function api(method, url, body) {
  const opt = { method, headers: {} };
  if (body !== undefined) { opt.headers['Content-Type'] = 'application/json'; opt.body = JSON.stringify(body); }
  const r = await fetch(url, opt);
  const data = await r.json().catch(() => ({}));
  if (!r.ok) throw new Error(data.detail?.message || r.status);
  return data;
}

// ---------- 浼氳瘽鍒楄〃 ----------
async function refreshSessions() {
  const box = document.getElementById('session-list');
  if (draftProject === null) { box.innerHTML = ''; return; }  // 鏈€夐」鐩?鈫?鏃犲巻鍙?  const list = await api('GET', '/api/sessions?user_id=default&project=' + encodeURIComponent(draftProject));
  box.innerHTML = '';
  list.sort((a, b) => (b.updated_at || '').localeCompare(a.updated_at || ''));
  for (const s of list) {
    const el = document.createElement('div');
    el.className = 'sess' + (s.session_id === sid ? ' active' : '');
    const proj = s.project ? ' 路 ' + esc(s.project) : '';
    // P3鈥?锛氬彇棣栧瓧绗︼紙鍚腑鏂?鏃ユ枃/鑻辨枃锛変綔 avatar锛屽苟鐢ㄥ悕瀛?hash 閫夎壊锛岄伩鍏嶉噸鍚嶆贩娣?    const rawName = (s.name || '鏂?).trim();
    const avatar = rawName ? Array.from(rawName)[0] : '鏂?;
    const palette = ['#1a73e8', '#34a853', '#fbbc05', '#ea4335', '#8e24aa', '#0097a7', '#5f6368'];
    let h = 0;
    for (let i = 0; i < rawName.length; i++) h = (h * 31 + rawName.charCodeAt(i)) | 0;
    const color = palette[Math.abs(h) % palette.length];
    el.innerHTML =
      '<div class="avatar" style="background:' + color + ';">' + esc(avatar) + '</div>' +
      '<div class="info">' +
        '<div class="name">' + esc(s.name || '鏂颁細璇?) + '</div>' +
        '<div class="meta">' + esc(s.status) + proj + '</div>' +
      '</div>' +
      '<button class="del" title="鍒犻櫎浼氳瘽" aria-label="鍒犻櫎浼氳瘽 ' + esc(rawName) + '">脳</button>';
    el.querySelector('.info').onclick = () => loadSession(s.session_id);
    const delBtn = el.querySelector('.del');
    delBtn.onclick = (ev) => { ev.stopPropagation(); deleteSession(s.session_id); };
    box.appendChild(el);
  }
}

async function deleteSession(targetSid) {
  if (!confirm('纭鍒犻櫎璇ヤ細璇濓紵姝ゆ搷浣滀笉鍙挙閿€銆?)) return;
  try {
    await api('DELETE', '/api/sessions/' + encodeURIComponent(targetSid));
  } catch (e) {
    addMsg('error', '鍒犻櫎澶辫触锛? + esc(String(e)));
    return;
  }
  if (targetSid === sid) {
    // 鍒犻櫎鐨勬槸褰撳墠浼氳瘽 鈫?鑷姩鏂板缓骞舵竻绌?    await newSession();
  } else {
    await refreshSessions();
  }
}

// ---------- 椤圭洰閰嶇疆 ----------
async function loadProjects() {
  try {
    projects = await api('GET', '/api/projects');
  } catch (e) {
    projects = [];
  }
  // 鍚姩鑷姩缁戦椤?/ 宸插垹椤圭洰鍥為€€棣栭」锛堢粺涓€鐢?GenesisState.autoBindProject 澶勭悊锛?  draftProject = GenesisState.autoBindProject(draftProject, projects);
  applyProjectContext();
  renderProjectSwitcher();
  renderDrawerList();
  if (drawerOpen) loadDrawerForm(drawerSelected);
}

function applyProjectContext() {
  psName.textContent = draftProject || '鏈€夋嫨';
}

function renderProjectSwitcher() {
  let html = '<div class="ps-item' + (draftProject === null ? ' active' : '') + '" data-name="">'
    + '<span>涓嶉€夋嫨椤圭洰</span><span class="ps-check">鉁?/span></div>';
  for (const p of projects) {
    html += '<div class="ps-item' + (p.name === draftProject ? ' active' : '') + '" data-name="' + esc(p.name) + '">'
      + '<span>' + esc(p.display_name || p.name) + '</span><span class="ps-check">鉁?/span></div>';
  }
  html += '<div class="ps-sep"></div>'
    + '<div class="ps-item ps-manage" data-manage="1">+ 椤圭洰绠＄悊锛堟墦寮€鎶藉眽锛?/div>';
  psMenu.innerHTML = html;
  psMenu.querySelectorAll('.ps-item[data-name]').forEach(it => {
    it.onclick = () => {
      if (!guardDrawerDirty()) return;
      draftProject = it.dataset.name === '' ? null : it.dataset.name;
      applyProjectContext();
      renderProjectSwitcher();
      updateUploadBar();
      toggleProjectSwitcher(false);
    };
  });
  psMenu.querySelectorAll('.ps-item[data-manage]').forEach(it => {
    it.onclick = () => {
      if (!guardDrawerDirty()) return;
      lastTriggerEl = it;
      toggleProjectSwitcher(false);
      openProjectDrawer(drawerSelected);
    };
  });
}

function toggleProjectSwitcher(force) {
  const willOpen = force === undefined ? !psMenu.classList.contains('open') : !!force;
  psMenu.classList.toggle('open', willOpen);
}

// ---------- 鎶藉眽 ----------
function openProjectDrawer(projectName) {
  drawerOpen = true;
  toggleProjectSwitcher(false);
  drawer.classList.add('open');
  const sel = (projectName === undefined || projectName === null) ? drawerSelected : projectName;
  try { loadDrawerForm(sel); } catch (e) { console.error(e); }
  renderDrawerList();   // 濮嬬粓娓叉煋宸︿晶鍒楄〃锛堝惈 +鏂板缓椤圭洰锛?}

function closeProjectDrawer() {
  if (!guardDrawerDirty()) return;
  drawerOpen = false;
  drawer.classList.remove('open');
}

function loadDrawerForm(projectName) {
  drawerSelected = (projectName === undefined) ? drawerSelected : projectName;
  const nameEl = document.getElementById('pf-name');
  const dispEl = document.getElementById('pf-display');
  const tplEl = document.getElementById('pf-template');
  const wrEl = document.getElementById('pf-write');
  const rulesEl = document.getElementById('pf-rules');
  const codeEl = document.getElementById('pf-code');
  const designEl = document.getElementById('pf-design');
  const delBtn = document.getElementById('pf-delete');
  if (drawerSelected) {
    const p = projects.find(x => x.name === drawerSelected);
    if (p) {
      nameEl.value = p.name; nameEl.readOnly = true;
      dispEl.value = p.display_name || '';
      tplEl.value = p.template || '';
      wrEl.value = p.write_instruction || '';
      rulesEl.value = (p.rules || []).join(', ');
      codeEl.value = p.existing_system_code_dir || '';
      designEl.value = p.design_docs_dir || '';
      delBtn.hidden = false;
    }
  } else {
    nameEl.value = ''; nameEl.readOnly = false;
    dispEl.value = '';
    tplEl.value = ''; wrEl.value = ''; rulesEl.value = ''; codeEl.value = ''; designEl.value = '';
    delBtn.hidden = true;
  }
  // B6锛氳褰曞瓧娈靛揩鐓х敤浜庤剰妫€娴?  drawerSnapshot = drawerSnapshotNow();
  renderDrawerList();
}

// B6锛氭娊灞夋湭淇濆瓨鍙樻洿瀹堝崼
function drawerSnapshotNow() {
  return GenesisState.computeDrawerSnapshot([
    document.getElementById('pf-name').value,
    document.getElementById('pf-display').value,
    document.getElementById('pf-template').value,
    document.getElementById('pf-write').value,
    document.getElementById('pf-rules').value,
    document.getElementById('pf-code').value,
    document.getElementById('pf-design').value,
  ]);
}
function isDrawerDirty() {
  if (!drawerOpen || drawerSnapshot === null) return false;
  return GenesisState.isDrawerDirty(drawerSnapshotNow(), drawerSnapshot);
}
function guardDrawerDirty() {
  if (isDrawerDirty()) return confirm('鏈夋湭淇濆瓨鐨勪慨鏀癸紝纭畾鏀惧純锛?);
  return true;
}

// P0鈥慍锛氭娊灞夊瓧娈电骇绾㈡銆傚懡涓叧閿瓧 鈫?缁欏搴旇緭鍏ュ姞 .invalid 3 绉掑悗娓呴櫎銆?// 鍏抽敭瀛椾笌 store.py 鐨?ProjectConfigError 涓枃 label 瀵归綈銆?const PF_LABEL_TO_FIELD = {
  '椤圭洰鍚?: 'pf-name',
  '妯℃澘': 'pf-template',
  '鍋氭垚璇存槑涔?: 'pf-write',
  '瑙勫垯': 'pf-rules',
  '鏃㈡湁绯荤粺浠ｇ爜搴?: 'pf-code',
  '鏃㈡湁璁捐鏂囨。鐩綍': 'pf-design',
};
function clearPfInvalid() {
  ['pf-name','pf-display','pf-template','pf-write','pf-rules','pf-code','pf-design']
    .forEach(id => document.getElementById(id).classList.remove('invalid'));
}
function flagPfInvalidByMessage(message) {
  if (!message) return;
  for (const [label, fid] of Object.entries(PF_LABEL_TO_FIELD)) {
    if (message.indexOf(label) >= 0) {
      const el = document.getElementById(fid);
      el.classList.add('invalid');
      el.focus();
      setTimeout(() => el.classList.remove('invalid'), 3000);
    }
  }
}
// 浠绘剰杈撳叆娓呮帀鑷韩绾㈡锛堥伩鍏?绾㈢潃杈撳叆"璇锛?['pf-name','pf-display','pf-template','pf-write','pf-rules','pf-code','pf-design']
  .forEach(id => document.getElementById(id).addEventListener('input', (e) => e.target.classList.remove('invalid')));

function renderDrawerList() {
  let html = '<div class="drawer-item di-create' + (drawerSelected === null ? ' active' : '') + '" data-name="">'
    + '<span class="di-new">锛?/span><span class="di-name">鏂板缓椤圭洰</span></div>';
  for (const p of projects) {
    html += '<div class="drawer-item' + (p.name === drawerSelected ? ' active' : '') + '" data-name="' + esc(p.name) + '">'
      + '<span class="di-name">' + esc(p.display_name || p.name) + '</span></div>';
  }
  const box = document.getElementById('drawer-list');
  box.innerHTML = html;
  box.querySelectorAll('.drawer-item').forEach(it => {
    it.onclick = () => {
      if (!guardDrawerDirty()) return;
      const n = it.dataset.name === '' ? null : it.dataset.name;
      loadDrawerForm(n);
    };
  });
}

async function saveDrawerProject() {
  clearPfInvalid();
  const body = {
    name: document.getElementById('pf-name').value.trim(),
    display_name: document.getElementById('pf-display').value.trim(),
    template: document.getElementById('pf-template').value.trim(),
    write_instruction: document.getElementById('pf-write').value.trim(),
    rules: document.getElementById('pf-rules').value.split(',').map(s => s.trim()).filter(Boolean),
    existing_system_code_dir: document.getElementById('pf-code').value.trim(),
    design_docs_dir: document.getElementById('pf-design').value.trim(),
  };
  if (!body.name) {
    flagPfInvalidByMessage('椤圭洰鍚?);
    addMsg('error', '椤圭洰鍚嶄笉鑳戒负绌?);
    return;
  }
  try {
    const cfg = await api('POST', '/api/projects', body);
    draftProject = cfg.name;
    drawerSelected = cfg.name;
    await loadProjects();
    addMsg('assistant', '椤圭洰銆? + esc(cfg.display_name || cfg.name) + '銆嶅凡淇濆瓨銆?);
    closeProjectDrawer();
  } catch (e) {
    // 400 / PROJECT_CONFIG_INVALID锛氬瓧娈电骇绾㈡瀹氫綅
    flagPfInvalidByMessage(String(e));
    addMsg('error', '淇濆瓨椤圭洰澶辫触锛? + esc(String(e)));
  }
}

async function deleteDrawerProject() {
  if (!drawerSelected) return;
  if (!confirm('纭鍒犻櫎椤圭洰銆? + drawerSelected + '銆嶏紵姝ゆ搷浣滀笉鍙挙閿€銆?)) return;
  const deleted = drawerSelected;
  try {
    await api('DELETE', '/api/projects/' + encodeURIComponent(deleted));
  } catch (e) {
    addMsg('error', '鍒犻櫎椤圭洰澶辫触锛? + esc(String(e)));
    return;
  }
  addMsg('assistant', '椤圭洰銆? + esc(deleted) + '銆嶅凡鍒犻櫎銆?);
  // P1鈥慒锛氬厛璁颁綇琚垹鐨勶紝鍐嶆竻 drawerSelected锛涢伩鍏?鍏?null 鍚庢瘮杈?鎭掑亣 bug
  drawerSelected = null;
  if (draftProject === deleted) {
    // 褰撳墠閫夌殑灏辨槸琚垹鐨勯」鐩?鈫?娓呯┖鍋忓ソ锛坅utoBindProject 浼氫粠鍓╀綑椤圭洰閲嶉€夛級
    draftProject = null;
  }
  await loadProjects();
  loadDrawerForm(null);
}

// ---------- 渚ц竟鏍忔姌鍙?----------
function toggleSidebar(force) {
  const el = document.getElementById('sidebar');
  const willCollapse = force === undefined ? !el.classList.contains('collapsed') : !!force;
  el.classList.toggle('collapsed', willCollapse);
  // 切换折叠/展开图标 + title + data-state
  const btn = document.getElementById('sidebar-toggle');
  if (btn) {
    if (willCollapse) {
      btn.textContent = '»';
      btn.title = '展开侧边栏';
      btn.dataset.state = 'collapsed';
    } else {
      btn.textContent = '«';
      btn.title = '折叠侧边栏';
      btn.dataset.state = 'expanded';
    }
  }
  try { localStorage.setItem('genesis_sidebar_collapsed', willCollapse ? '1' : '0'); } catch (e) { /* localStorage 不可用时忽略 */ }
}

// ---------- 涓婁紶鍖猴細濮嬬粓鏄剧ず瀹屾暣绫诲瀷涓嬫媺 ----------
// P0鈥態锛氶€夐」鐩椂涔熷厑璁歌ˉ浼?template / write_instruction / rules / existing_system锛?// 涓嶅啀钘忚捣鍏ュ彛銆?椤圭洰宸查缃?template 鏃跺啀涓婁紶 template"鍦ㄤ笂浼犲鐢?confirm() 鏄惧紡纭銆?function updateUploadBar() {
  const sel = document.getElementById('file-type');
  const hint = document.getElementById('proj-hint');
  if (sel) sel.style.display = '';
  if (!hint) return;
  // 榛樿 file_type 浠嶄负 requirements锛堟渶甯哥敤锛夛紝浣嗕笅鎷夊缁堝彲鏀广€?  if (sel && sel.value !== 'requirements') sel.value = 'requirements';
  if (draftProject) {
    hint.textContent = '榛樿涓婁紶瑕佷欢瀹氫箟 xlsx锛涘闇€琛ヤ紶妯℃澘/瑙勫垯/鏃㈡湁绯荤粺 zip锛岃鍦ㄤ笅鎷変腑閫夋嫨瀵瑰簲绫诲瀷銆?;
  } else {
    hint.textContent = '璇烽€夋嫨 file_type 鍚庝笂浼狅紙鏈€夐」鐩椂锛屾ā鏉?瑙勫垯浠嶅彲鎵嬪姩涓婁紶锛夈€?;
  }
}

// ---------- 绌烘€?娆㈣繋娓叉煋 ----------
function renderEmptyOrWelcome() {
  chatEl.innerHTML = '';
  // P1鈥慒锛氭杩庢枃鐢?GenesisState.buildWelcome 缁熶竴鏉ユ簮
  addMsg('assistant', GenesisState.buildWelcome(draftProject));
}

// ---------- 浼氳瘽鍒涘缓/鍔犺浇 ----------
async function newSession() {
   if (progressWs) { try { progressWs.close(); } catch (e) {} } progressWs = null;
  sid = null;
  activeProject = null;
  // 淇濈暀 draftProject锛堝綋鍓嶉《鏍忓凡閫夐」鐩級锛屼娇鏂颁細璇濈户鎵块」鐩粦瀹氾紙搂4.2锛?  try { localStorage.removeItem('genesis_session'); } catch (e) { /* 蹇界暐 */ }
  chatEl.innerHTML = '';
  badge.textContent = '鏈垱寤轰細璇?;
  updateUploadBar();
  await refreshRagStats();
  await refreshSessions();
  renderEmptyOrWelcome();
}

async function loadSession(id) {
  try {
    const rec = await api('GET', '/api/sessions/' + encodeURIComponent(id));
    sid = id;
    activeProject = rec.project || null;
    // P1鈥慏锛氫笉鍐嶉殣寮忚鐩?draftProject銆備細璇濅簨瀹?activeProject)涓庣敤鎴峰亸濂?draftProject)
    // 鍒嗗眰锛涜嫢涓嶄竴鑷达紝鐢辨彁绀烘潯璁╃敤鎴蜂富鍔ㄩ€夋嫨銆?    // draftProject = rec.project || null;   // 鍒犻櫎锛氬師琛屼负浼氭倓鎮勬敼鐢ㄦ埛鍋忓ソ
    applyProjectContext();
    badge.textContent = '浼氳瘽: ' + (rec.name || '鏂颁細璇?);
    if (progressWs) { try { progressWs.close(); } catch (e) {} }
    progressWs = GenesisWS.connectProgressWs(id, {
      onProgress: (e) => GenesisWS.applyProgressEvent(e, (role, text) => addMsg(role, text)),
      onClose: () => {},
    });
    const msgs = await api('GET', '/api/chat/' + encodeURIComponent(id) + '/messages');
    chatEl.innerHTML = '';
    for (const m of msgs) {
      const roleMap = { user: 'user', progress: 'progress', error: 'error' };
      const role = roleMap[m.role] || 'assistant';
      addMsg(role, esc(m.content));
    }
    updateUploadBar();
    await refreshRagStats();
    await refreshSessions();
    try { localStorage.setItem('genesis_session', sid); } catch (e) { /* 蹇界暐 */ }
    renderProjectMismatchHint();
  } catch (e) {
    addMsg('error', '鍔犺浇浼氳瘽澶辫触锛? + esc(String(e)));
  }
}

// P1鈥慏锛氶」鐩笉鍖归厤鎻愮ず鏉°€俛ctiveProject 涓?draftProject 涓嶄竴鑷存椂鏄剧ず锛?// "鍒囧埌璇ラ」鐩? 鈫?鍐?draftProject = activeProject锛屽埛鏂帮紱
// "淇濈暀"      鈫?鍐欏叆 sessionStorage 鏍囪锛屽埛鏂帮紱鍚庣画 loadSession 涓嶅啀鎻愮ず銆?function renderProjectMismatchHint() {
  const old = document.getElementById('proj-mismatch-hint');
  if (old) old.remove();
  if (!sid) return;
  if (!activeProject) return;
  if (activeProject === draftProject) return;
  // 宸?淇濈暀"杩囨湰浼氳瘽鐨勪笉鍐嶆彁绀?  let skipped = {};
  try { skipped = JSON.parse(sessionStorage.getItem('genesis_skipped_project_hint') || '{}'); } catch (e) { skipped = {}; }
  if (skipped[sid] === activeProject) return;
  const wrap = document.createElement('div');
  wrap.id = 'proj-mismatch-hint';
  wrap.className = 'msg assistant';
  wrap.innerHTML =
    '<div class="bubble">' +
    '璇ヤ細璇濆睘浜庨」鐩?<strong>' + esc(activeProject) + '</strong>锛? +
    '褰撳墠椤舵爮椤圭洰涓?<strong>' + esc(draftProject || '锛堟湭閫夋嫨锛?) + '</strong>銆? +
    '<div class="actions">' +
    '<a href="#" data-act="switch">鍒囧埌璇ラ」鐩?/a>' +
    '<a href="#" data-act="keep">淇濈暀褰撳墠椤圭洰</a>' +
    '</div></div>';
  chatEl.prepend(wrap);
  wrap.querySelector('[data-act="switch"]').onclick = (e) => {
    e.preventDefault();
    draftProject = activeProject;
    applyProjectContext();
    renderProjectSwitcher();
    updateUploadBar();
    refreshSessions();
    wrap.remove();
  };
  wrap.querySelector('[data-act="keep"]').onclick = (e) => {
    e.preventDefault();
    try {
      skipped[sid] = activeProject;
      sessionStorage.setItem('genesis_skipped_project_hint', JSON.stringify(skipped));
    } catch (er) { /* 蹇界暐 */ }
    wrap.remove();
  };
}

// P2鈥慔锛歴end() in-flight 閿侊紝闃叉蹇€熷弻鍑讳骇鐢熼噸澶嶈姹?let sendInFlight = false;
async function send() {
  if (sendInFlight) return;   // in-flight 鏈熼棿鍐嶆杩涘叆鐩存帴蹇界暐
  const text = inputEl.value.trim();
  if (!text) return;
  sendInFlight = true;
  if (!sid) {
    // 棣栨潯娑堟伅锛氬厛钀藉簱浼氳瘽锛圖-v4锛?    try {
      const d = await api('POST', '/api/sessions', { user_id: 'default', project: draftProject || null });
      sid = d.session_id;
      activeProject = draftProject || null;
      badge.textContent = '浼氳瘽: ' + (d.name || '鏂颁細璇?);
      try { localStorage.setItem('genesis_session', sid); } catch (e) { /* 蹇界暐 */ }
      await refreshSessions();
    } catch (e) {
      addMsg('error', '鍒涘缓浼氳瘽澶辫触锛? + esc(String(e)));
      return;
    }
  }
  if (progressWs) { try { progressWs.close(); } catch (e) {} }
  progressWs = GenesisWS.connectProgressWs(sid, {
    onProgress: (e) => GenesisWS.applyProgressEvent(e, (role, text) => addMsg(role, text)),
    onClose: () => {},
  });
  inputEl.value = '';
  addMsg('user', esc(text));
  const typing = showTyping();
  sendBtn.disabled = true;
  try {
    const res = await api('POST', '/api/chat/' + encodeURIComponent(sid) + '/messages', { content: text });
    typing.remove();
    if (res.progress && res.progress.length) {
      const items = res.progress.map(p => '<span class="progress-item ' + (p.status || 'ok') + '">' + esc(p.step) + ': ' + esc(p.detail || '') + '</span>').join('');
      addMsg('progress', items);
    }
    let replyHtml = esc(res.reply || '');
    const s = res.status;
    if (s === 'done' || s === 'writing') {
      replyHtml += '<div class="actions">'
        + '<a href="/api/sessions/' + sid + '/result/download">涓嬭浇 docx</a>'
        + '<a href="/api/sessions/' + sid + '/result/preview">棰勮</a>'
        + '<a href="/api/sessions/' + sid + '/result/impact-report">褰卞搷璋冩煡涔?/a>'
        + '<a href="/api/sessions/' + sid + '/result/qa-report">QA 鎶ュ憡</a></div>';
    }
    addMsg('assistant', replyHtml);
  } catch (e) {
    typing.remove();
    addMsg('error', '璇锋眰澶辫触锛? + esc(String(e)));
  } finally {
    sendInFlight = false;
    sendBtn.disabled = false;
    inputEl.focus();
  }
}

document.getElementById('send').addEventListener('click', send);
inputEl.addEventListener('keydown', e => { if (e.key === 'Enter') send(); });
document.getElementById('new-chat').addEventListener('click', () => newSession().catch(e => addMsg('error', esc(String(e)))));
document.getElementById('sidebar-toggle').addEventListener('click', () => toggleSidebar());
document.getElementById('ps-current').addEventListener('click', (e) => { e.stopPropagation(); lastTriggerEl = e.currentTarget; toggleProjectSwitcher(); });
document.getElementById('drawer-close').addEventListener('click', closeProjectDrawer);
document.getElementById('pf-save').addEventListener('click', saveDrawerProject);
document.getElementById('pf-delete').addEventListener('click', deleteDrawerProject);

// ---------- P0鈥慉锛歊AG 寮€鍏?+ 鐘舵€佸窘鏍?+ 寮€濮嬪奖鍝嶈皟鏌?----------
const ragEnabledEl = document.getElementById('rag-enabled');
const ragStatsEl   = document.getElementById('rag-stats');
const ragBarEl     = document.getElementById('rag-bar');
const impactBtnEl  = document.getElementById('impact-btn');

const RAG_LS_KEY = 'genesis_rag_enabled';
function readRagFlag() {
  try { return localStorage.getItem(RAG_LS_KEY) === '1'; } catch (e) { return false; }
}
function writeRagFlag(v) {
  try { localStorage.setItem(RAG_LS_KEY, v ? '1' : '0'); } catch (e) { /* 蹇界暐 */ }
}
ragEnabledEl.addEventListener('change', () => { writeRagFlag(ragEnabledEl.checked); updateImpactButton(); });

async function refreshRagStats() {
  // 鏃?sid 鈫?闅愯棌 RAG 鏉?  if (!sid) {
    ragBarEl.hidden = true;
    return;
  }
  ragBarEl.hidden = false;
  let stats = { chunks: 0, rag_enabled: false };
  try {
    stats = await api('GET', '/api/sessions/' + encodeURIComponent(sid) + '/rag-stats');
  } catch (e) {
    stats = { chunks: 0, rag_enabled: false };
  }
  const n = Number(stats.chunks) || 0;
  ragStatsEl.textContent = n > 0
    ? 'RAG 宸茬储寮?' + n + ' 鐗囨'
    : 'RAG 0 鐗囨锛堣涓婁紶鏃㈡湁绯荤粺 zip锛?;
  ragStatsEl.classList.toggle('ready', n > 0);
  ragStatsEl.classList.toggle('zero', n === 0);
  // 寮€鍏冲彲鐢ㄦ€э細蹇呴』鍏堟湁 RAG 绱㈠紩鎵嶈兘鐢?  ragEnabledEl.disabled = n === 0;
  if (n === 0) {
    ragEnabledEl.checked = false;
    writeRagFlag(false);
    ragEnabledEl.parentElement.title = '璇峰厛鍦ㄤ笂浼犲尯閫夋嫨"鏃㈡湁绯荤粺 zip"骞朵笂浼?;
  } else {
    ragEnabledEl.checked = readRagFlag();
    ragEnabledEl.parentElement.title = ragEnabledEl.checked
      ? 'RAG 妫€绱㈢粨鏋滀細娉ㄥ叆鍒?LLM prompt'
      : '鍕鹃€夊悗鍚敤 RAG 妫€绱?;
  }
  updateImpactButton();
}

function updateImpactButton() {
  // 宸叉湁 RAG 绱㈠紩锛坮ag-stats 鍐冲畾锛?涓旀湁 sid 鎵嶈兘褰卞搷
  if (!sid) { impactBtnEl.disabled = true; return; }
  const hasRag = (Number(ragStatsEl.dataset.chunks || 0) > 0) || !ragEnabledEl.disabled;
  impactBtnEl.disabled = !hasRag;
  impactBtnEl.textContent = ragEnabledEl.checked
    ? '寮€濮嬪奖鍝嶈皟鏌ワ紙鍚敤 RAG锛?
    : '寮€濮嬪奖鍝嶈皟鏌?;
}

impactBtnEl.addEventListener('click', async () => {
  if (!sid) { addMsg('error', '璇峰厛鍙戦€佷竴鏉℃秷鎭互鍒涘缓浼氳瘽'); inputEl.focus(); return; }
  const useRag = !!ragEnabledEl.checked;
  impactBtnEl.disabled = true;
  const typing = showTyping();
  try {
    const url = '/api/sessions/' + encodeURIComponent(sid) + '/start-impact?use_rag=' + (useRag ? 'true' : 'false');
    const r = await fetch(url, { method: 'POST' });
    const d = await r.json();
    if (!r.ok) throw new Error(d.detail?.message || r.status);
    typing.remove();
    addMsg('progress', '<span class="progress-item ok">褰卞搷璋冩煡宸叉彁浜わ紙use_rag=' + (useRag ? 'true' : 'false') + '锛?/span>');
    // 璁?WebSocket 鎶婂悗缁繘搴︽帹涓婃潵锛涚◢鍚庣敤鎴峰彲鏌?impact-result
    addMsg('assistant', '褰卞搷璋冩煡宸插惎鍔ㄣ€傚畬鎴愬悗鍙湪姝や細璇濈偣鍑?棰勮"鎴栬闂?/result/impact-report 涓嬭浇鎶ュ憡銆?);
  } catch (e) {
    typing.remove();
    addMsg('error', '褰卞搷璋冩煡澶辫触锛? + esc(String(e)));
  } finally {
    updateImpactButton();
  }
});
document.addEventListener('click', (e) => {
  // 鐐瑰嚮鍒囨崲鍣ㄥ閮ㄥ叧闂笅鎷?  if (!document.getElementById('proj-switcher').contains(e.target)) toggleProjectSwitcher(false);
});
document.addEventListener('keydown', (e) => {
  if (e.key === 'Escape') {
    if (psMenu.classList.contains('open')) toggleProjectSwitcher(false);
    else if (drawerOpen) closeProjectDrawer();
    if (lastTriggerEl) { lastTriggerEl.focus(); lastTriggerEl = null; }
  }
});

// 瀹㈡埛绔被鍨?鈫?鎵╁睍鍚嶇櫧鍚嶅崟鏍￠獙锛圥0鈥態 / P1鈥慐锛夈€?const UPLOAD_EXT_RULES = {
  existing_system: ['.zip'],
  requirements: ['.xlsx'],
  template: ['.docx'],
  write_instruction: ['.docx'],
  rules: ['.docx', '.xlsx'],
};
function pickExt(name) {
  const i = String(name).lastIndexOf('.');
  return i >= 0 ? String(name).slice(i).toLowerCase() : '';
}
// 椤圭洰绾ч缃?鈫?鎻愰啋锛氬啀娆′笂浼犲皢瑕嗙洊璇ヤ細璇濈殑璇ョ被鍨嬫枃浠躲€?// 杩欓噷鐢?activeProject/draftProject 瀵瑰簲鐨勯」鐩?config锛坧rojects[]锛夊垽瀹氭槸鍚﹂缃€?function projectHasPrefixedType(ft) {
  const name = activeProject || draftProject;
  if (!name) return false;
  const p = (projects || []).find(x => x.name === name);
  if (!p) return false;
  if (ft === 'template') return !!(p.template && p.template.trim());
  if (ft === 'write_instruction') return !!(p.write_instruction && p.write_instruction.trim());
  if (ft === 'existing_system') return !!(p.existing_system_code_dir && p.existing_system_code_dir.trim());
  if (ft === 'rules') return Array.isArray(p.rules) && p.rules.length > 0;
  return false;
}

document.getElementById('upload-btn').addEventListener('click', async () => {
  if (!sid) { addMsg('error', '璇峰厛鍙戦€佷竴鏉℃秷鎭互鍒涘缓浼氳瘽'); inputEl.focus(); return; }
  const sel = document.getElementById('file-type');
  const ft = GenesisState.resolveUploadType(activeProject, draftProject, sel.value);
  const file = document.getElementById('file-input').files[0];
  if (!file) { addMsg('error', '璇烽€夋嫨鏂囦欢'); return; }
  // P0鈥態 / P1鈥慐锛氬鎴风绫诲瀷涓庢墿灞曞悕鏍￠獙
  const allowed = UPLOAD_EXT_RULES[ft];
  if (allowed) {
    const ext = pickExt(file.name);
    if (!ext || !allowed.includes(ext)) {
      addMsg('error', '绫诲瀷涓嶅尮閰嶏細' + esc(ft) + ' 搴斾负 ' + allowed.join('/') + ' 鏂囦欢锛堝綋鍓嶏細' + esc(file.name) + '锛?);
      return;
    }
  }
  // P0鈥態锛氶」鐩凡棰勭疆鍚岀被鍨嬫椂鏄惧紡纭瑕嗙洊锛堜笉鍐嶄互"钘忚捣鍏ュ彛"鍋氶殣寮忕害鏉燂級
  if (projectHasPrefixedType(ft)) {
    const ok = confirm('椤圭洰宸查缃?' + ft + '銆傜户缁笂浼犲皢瑕嗙洊璇ヤ細璇濅腑鐨勬绫诲瀷鏂囦欢锛屾槸鍚︾户缁紵');
    if (!ok) return;
  }
  const fd = new FormData();
  fd.append('file_type', ft);
  fd.append('file', file);
  const statusEl = document.getElementById('upload-status');
  statusEl.textContent = '涓婁紶涓€?;
  try {
    const r = await fetch('/api/sessions/' + encodeURIComponent(sid) + '/files', { method: 'POST', body: fd });
    const d = await r.json();
    if (!r.ok) throw new Error(d.detail?.message || r.status);
    statusEl.textContent = '';
    // B5 / P1鈥慒锛氫笂浼犳垚鍔熷悗鍚屾 activeProject銆佸埛鏂颁笂浼犳潯涓庝晶杈规爮鐘舵€?    const rec = await api('GET', '/api/sessions/' + encodeURIComponent(sid));
    activeProject = rec.project || null;
    badge.textContent = '浼氳瘽: ' + (rec.name || '鏂颁細璇?);
    await refreshSessions();
    updateUploadBar();   // P1鈥慒锛氫笂浼犳垚鍔熷悗鍚屾涓婁紶鏉★紙闃茬姸鎬佹粸鍚庯級
    await refreshRagStats();   // P0鈥慉锛氫笂浼?existing_system 鍚?RAG 绱㈠紩宸插缓
    document.getElementById('file-input').value = '';   // 浠呮垚鍔熸椂娓呯┖
    addMsg('user', '[涓婁紶] ' + ft + '锛? + d.file_name);
    addMsg('progress', '<span class="progress-item ok">涓婁紶瀹屾垚锛? + esc(d.file_name) + '锛? + d.size + 'B锛?/span>');
  } catch (e) {
    statusEl.textContent = '';
    // F1锛氬け璐ヤ繚鐣?file-input 鍊硷紝灞曠ず鍚庣鏄庣粏
    addMsg('error', '涓婁紶澶辫触锛? + esc(String(e)));
  }
});

// ---------- 鍚姩锛氭仮澶嶄晶杈规爮鎶樺彔鎬併€佷笂娆′細璇?----------
(async () => {
  try {
    const collapsed = localStorage.getItem('genesis_sidebar_collapsed') === '1';
    if (collapsed) document.getElementById('sidebar').classList.add('collapsed');
  } catch (e) { /* 蹇界暐 */ }
  await loadProjects();
  const saved = (() => { try { return localStorage.getItem('genesis_session'); } catch (e) { return null; } })();
  if (saved) {
    // P2鈥慔锛氬惎鍔ㄦ仮澶嶅墠鏄剧ず loading 鍗犱綅锛岄伩鍏嶇┖ chat 涓€闂?    addMsg('assistant', '姝ｅ湪鎭㈠涓婃浼氳瘽鈥?);
    try {
      await loadSession(saved);
      // P2鈥?锛氭仮澶嶅悗鑻ヤ細璇濈殑椤圭洰宸茶鍒狅紝娓呮帀 localStorage 浠ュ厤涓嬫鍐嶈瘯
      const rec = await api('GET', '/api/sessions/' + encodeURIComponent(saved));
      const recProj = rec && rec.project;
      if (recProj && !projects.find(p => p.name === recProj)) {
        try { localStorage.removeItem('genesis_session'); } catch (e) { /* 蹇界暐 */ }
        // 椤舵爮鑻ユ樉绀虹殑鏄凡鍒犻」鐩紝鍒锋柊鍥為€€
        if (draftProject === recProj) {
          draftProject = (projects.length > 0) ? projects[0].name : null;
          applyProjectContext();
        }
      }
      return;
    } catch (e) { /* 蹇界暐锛屾柊寤?*/ }
  }
  newSession().catch(e => addMsg('error', esc(String(e))));
})();