'use strict';

/**
 * 数据采集 + 趋势图表 · 前端逻辑
 * 数据采集：多主体 tab / 同步 / 筛选 / BI 表格 / CSV 导出
 * 趋势图表：环比指标条 / 主趋势 / 门店排行 / 转化漏斗 / 门店对比 / 周报导出
 * 智能问数：右下角机器人（仅经营分析页面显示），弹窗对话，支持上下文追问
 */
(function () {

  // ---------- 工具 ----------

  function showToast(msg, type) {
    const wrap = document.getElementById('toast-wrap');
    const node = document.createElement('div');
    node.className = 'toast toast-' + (type || 'success');
    node.textContent = msg;
    wrap.appendChild(node);
    setTimeout(() => { node.style.opacity = '0'; node.style.transition = 'opacity 0.3s'; }, 2600);
    setTimeout(() => { if (node.parentNode) wrap.removeChild(node); }, 3000);
  }

  async function jsonFetch(url, opts) {
    const r = await fetch(url, opts);
    const data = await r.json().catch(() => ({}));
    if (!r.ok) throw new Error(data.error || `HTTP ${r.status}`);
    return data;
  }

  const z2 = (n) => String(n).padStart(2, '0');
  function ymdLocal(d) { return `${d.getFullYear()}${z2(d.getMonth() + 1)}${z2(d.getDate())}`; }
  function daysAgoYmd(n) { return ymdLocal(new Date(Date.now() - n * 86400000)); }
  function ymdToDash(s) { return /^\d{8}$/.test(String(s)) ? `${s.slice(0, 4)}-${s.slice(4, 6)}-${s.slice(6, 8)}` : String(s || ''); }
  function dashToYmd(s) { return /^\d{4}-\d{2}-\d{2}$/.test(String(s)) ? s.replace(/-/g, '') : ''; }

  function fmtNum(v) {
    if (v == null || v === '') return '—';
    const n = Number(v);
    return Number.isFinite(n) ? n.toLocaleString('zh-CN', { maximumFractionDigits: 0 }) : String(v);
  }
  function fmtMoney(v) {
    if (v == null || v === '') return '—';
    const n = Number(v);
    return Number.isFinite(n) ? n.toLocaleString('zh-CN', { minimumFractionDigits: 2, maximumFractionDigits: 2 }) : String(v);
  }
  function fmtPct(v) {
    if (v == null || v === '') return '—';
    const n = Number(v);
    return Number.isFinite(n) ? (n * 100).toFixed(2) + '%' : String(v);
  }
  function fmtCell(col, v) {
    if (col.type === 'pct') return fmtPct(v);
    if (col.type === 'money') return fmtMoney(v);
    if (col.type === 'int') return fmtNum(v);
    if (col.type === 'num') return v == null || v === '' ? '—' : Number(v).toFixed(2);
    if (col.type === 'date') return v ? ymdToDash(v) : '—';
    return v == null || v === '' ? '—' : String(v);
  }
  function fmtByCol(col, v) {
    if (v == null || v === '') return '—';
    if (!col) return String(v);
    if (col.type === 'pct') return fmtPct(v);
    if (col.type === 'money') return fmtMoney(v);
    if (col.type === 'int') return fmtNum(v);
    if (col.type === 'num') return Number(v).toFixed(2);
    return String(v);
  }

  const RATE_THRESHOLDS = { clkExpRate: { good: 0.09, bad: 0.06 }, ordClkRate: { good: 0.025, bad: 0.02 } };
  function rateClass(key, v) {
    const t = RATE_THRESHOLDS[key];
    if (!t || v == null || v === '') return '';
    const n = Number(v);
    if (!Number.isFinite(n)) return '';
    if (n >= t.good) return 'val-good';
    if (n < t.bad) return 'val-bad';
    return 'val-warn';
  }

  const LS = {
    get(k, fallback) { try { const v = localStorage.getItem(k); return v == null ? fallback : JSON.parse(v); } catch { return fallback; } },
    set(k, v) { try { localStorage.setItem(k, JSON.stringify(v)); } catch { /* ignore */ } },
  };

  // ---------- 状态 ----------

  const state = {
    inited: false,
    entities: [],
    entity: null,
    preset: '30',
    mode: 'detail',
    shopFilter: new Set(),
    q: '',
    columns: [],
    visible: new Set(),
    sortKey: 'date',
    sortDir: 'desc',
    rows: [],
    summary: null,
    conn: null,
    syncShops: new Set(),
    syncPollTimer: null,
    reportAbort: null,
    analysisShopFilter: new Set(),
    analysisPreset: '30',
    comparePrev: true,
    chat: { open: false, busy: false, messages: [] },
  };

  let chartMetric = LS.get('shanReports.chartMetric', 'grossAmt');
  const chartInstances = {};
  let anaCache = null;
  let lastAskApply = null;

  const $ = (id) => document.getElementById(id);

  // ---------- 日期区间 ----------

  function currentRange() {
    if (state.preset === 'custom') {
      const from = dashToYmd($('reportFromDate').value);
      const to = dashToYmd($('reportToDate').value);
      if (from && to && from <= to) return { from, to };
      return { from: daysAgoYmd(30), to: daysAgoYmd(0) };
    }
    const days = Number(state.preset) || 30;
    return { from: daysAgoYmd(days), to: daysAgoYmd(0) };
  }

  function analysisRange() {
    const sel = $('analysisRangePreset');
    const days = Number(sel && sel.value) || 30;
    return { from: daysAgoYmd(days), to: daysAgoYmd(0) };
  }

  // ---------- 主体 tabs（数据采集 / 趋势图表 共用选中） ----------

  function activeEntity() {
    return state.entities.find((e) => e.key === state.entity) || null;
  }

  function renderEntityTabs() {
    for (const containerId of ['entityTabs', 'analysisEntityTabs']) {
      const wrap = $(containerId);
      if (!wrap) continue;
      wrap.innerHTML = '';
      if (!state.entities.length) {
        const empty = document.createElement('div');
        empty.className = 'entity-tabs-empty';
        empty.textContent = '暂无主体 —— 请先在商家客户端登录并完成一次「同步数据」';
        wrap.appendChild(empty);
        continue;
      }
      for (const e of state.entities) {
        const btn = document.createElement('button');
        btn.type = 'button';
        btn.className = 'entity-tab' + (e.key === state.entity ? ' active' : '');
        btn.innerHTML = `<span class="entity-name"></span><span class="entity-meta"></span>`;
        btn.querySelector('.entity-name').textContent = e.name || e.key;
        const shopCount = (e.shops || []).length || e.shopCount || 0;
        btn.querySelector('.entity-meta').textContent = shopCount ? `${shopCount} 家门店` : '主体';
        btn.addEventListener('click', () => {
          if (state.entity === e.key) return;
          state.entity = e.key;
          state.shopFilter = new Set();
          state.analysisShopFilter = new Set();
          state.sortKey = 'date'; state.sortDir = 'desc';
          LS.set('shanReports.entity', e.key);
          anaCache = null;
          renderEntityTabs();
          renderShopOptions();
          loadReport();
          renderCharts();
        });
        wrap.appendChild(btn);
      }
    }
  }

  // ---------- 门店多选下拉（数据采集 / 同步 / 趋势图表 三处） ----------

  function toggleDropdown(menuId, triggerId, open) {
    const trigger = $(triggerId);
    const menu = menuId ? $(menuId) : null;
    const shouldOpen = open === undefined ? (menu ? menu.hidden : false) : open;
    if (menu) menu.hidden = !shouldOpen;
    if (trigger) trigger.setAttribute('aria-expanded', String(shouldOpen));
  }

  function fillShopMenu(menu, shops) {
    menu.innerHTML = '';
    const all = document.createElement('button');
    all.type = 'button';
    all.className = 'scan-dropdown-item';
    all.dataset.value = '__all__';
    all.setAttribute('role', 'option');
    all.innerHTML = '<span class="scan-check"><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round"><path d="M5 12.5l4.5 4.5L19 7.5"/></svg></span><span>全部门店</span>';
    menu.appendChild(all);
    const sorted = shops.slice().sort((a, b) => String(a.shopName).localeCompare(String(b.shopName), 'zh-CN'));
    for (const s of sorted) {
      const item = document.createElement('button');
      item.type = 'button';
      item.className = 'scan-dropdown-item';
      item.dataset.value = String(s.shopId);
      item.setAttribute('role', 'option');
      item.innerHTML = '<span class="scan-check"><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round"><path d="M5 12.5l4.5 4.5L19 7.5"/></svg></span><span></span>';
      item.lastElementChild.textContent = s.shopName;
      menu.appendChild(item);
    }
  }

  function renderDropdownSelection(menu, selection, textEl, allLabel) {
    menu.querySelectorAll('.scan-dropdown-item').forEach((node) => {
      const selected = selection.has(node.dataset.value);
      node.classList.toggle('selected', selected);
      node.setAttribute('aria-selected', String(selected));
    });
    const picked = Array.from(selection).filter((v) => v !== '__all__');
    textEl.textContent = picked.length ? `已选 ${picked.length} 家门店` : allLabel;
  }

  function renderShopOptions() {
    const entity = activeEntity();
    const shops = (entity && entity.shops) || [];
    const menus = [
      { menu: $('reportShopMenu'), sel: state.shopFilter, text: $('reportShopText'), label: '全部门店' },
      { menu: $('syncShopMenu'), sel: state.syncShops, text: $('syncShopText'), label: '选择门店' },
      { menu: $('anaShopMenu'), sel: state.analysisShopFilter, text: $('anaShopText'), label: '全部门店' },
    ];
    for (const m of menus) {
      if (!m.menu) continue;
      fillShopMenu(m.menu, shops);
      renderDropdownSelection(m.menu, m.sel, m.text, m.label);
    }
  }

  function makeDropdownHandler(menu, selection, textEl, allLabel, onChange) {
    return (event) => {
      const item = event.target.closest('[data-value]');
      if (!item) return;
      const value = item.dataset.value;
      if (value === '__all__') selection.clear();
      else if (selection.has(value)) selection.delete(value);
      else selection.add(value);
      renderDropdownSelection(menu, selection, textEl, allLabel);
      if (onChange) onChange();
    };
  }

  // ---------- KPI 卡片（数据采集页） ----------

  function renderKpis() {
    const wrap = $('reportKpis');
    wrap.innerHTML = '';
    const s = state.summary || {};
    const cards = [
      { label: '营业额(元)', value: fmtMoney(s.grossAmt), cls: 'accent' },
      { label: '收入(元)', value: fmtMoney(s.incomeAmt), cls: 'ok' },
      { label: '有效订单', value: fmtNum(s.validOrderCnt), cls: 'accent' },
      { label: '曝光人数', value: fmtNum(s.expUv), cls: '' },
      { label: '下单人数', value: fmtNum(s.orderUserCnt), cls: '' },
      { label: '进店转化率', value: fmtPct(s.clkExpRate), cls: 'warn', rate: 'clkExpRate' },
      { label: '客单价(元)', value: fmtMoney(s.perActualPay), cls: 'ok' },
    ];
    for (const c of cards) {
      const div = document.createElement('div');
      div.className = 'metric ' + (c.cls || '');
      div.innerHTML = `<span class="metric-body"><span class="metric-label"></span><span class="metric-value ${c.rate ? rateClass(c.rate, s[c.rate]) : ''}"></span></span>`;
      div.querySelector('.metric-label').textContent = c.label;
      div.querySelector('.metric-value').textContent = c.value;
      wrap.appendChild(div);
    }
  }

  // ---------- 报表表格（数据采集页） ----------

  function metricColumns() {
    return state.columns.filter((c) => c.key !== 'date' && c.key !== 'shopName' && state.visible.has(c.key));
  }

  function tableColumns() {
    const metricCols = metricColumns();
    if (state.mode === 'shop') return [{ key: 'shopName', label: '门店名称', type: 'text' }, ...metricCols];
    if (state.mode === 'date') return [{ key: 'date', label: '日期', type: 'date' }, ...metricCols];
    return [{ key: 'date', label: '日期', type: 'date' }, { key: 'shopName', label: '门店名称', type: 'text' }, ...metricCols];
  }

  function sortedRows() {
    return state.rows.slice().sort((a, b) => {
      const av = a[state.sortKey], bv = b[state.sortKey];
      if (av == null || av === '') return 1;
      if (bv == null || bv === '') return -1;
      if (typeof av === 'number' && typeof bv === 'number') return (av - bv) * (state.sortDir === 'asc' ? 1 : -1);
      return String(av).localeCompare(String(bv), 'zh-CN') * (state.sortDir === 'asc' ? 1 : -1);
    });
  }

  function renderTable() {
    const cols = tableColumns();
    const thead = $('reportTableHead');
    const tbody = $('reportTableBody');
    $('reportRowCount').textContent = `${state.rows.length} 行`;
    const empty = $('reportEmpty');
    if (!state.rows.length) {
      thead.innerHTML = '';
      tbody.innerHTML = '';
      empty.hidden = false;
      return;
    }
    empty.hidden = true;
    thead.innerHTML = '<tr>' + cols.map((c) => {
      const active = state.sortKey === c.key;
      const arrow = active ? (state.sortDir === 'asc' ? ' ↑' : ' ↓') : '';
      return `<th class="col-${c.type}${['money', 'int', 'pct', 'num'].includes(c.type) ? ' col-num' : ''}" data-key="${c.key}">${c.label}${arrow}</th>`;
    }).join('') + '</tr>';
    tbody.innerHTML = sortedRows().map((r) => '<tr>' + cols.map((c) => {
      const isNum = ['money', 'int', 'pct', 'num'].includes(c.type);
      const cls = `col-${c.type}${isNum ? ' col-num' : ''}${c.type === 'pct' ? ' ' + rateClass(c.key, r[c.key]) : ''}`;
      return `<td class="${cls}">${fmtCell(c, r[c.key])}</td>`;
    }).join('') + '</tr>').join('');
  }

  // ---------- 数据加载（数据采集页） ----------

  async function loadReport() {
    const entity = state.entity;
    if (!entity) {
      state.rows = []; state.summary = null;
      renderTable(); renderKpis();
      return;
    }
    if (state.reportAbort) state.reportAbort.abort();
    const ctrl = new AbortController();
    state.reportAbort = ctrl;
    const { from, to } = currentRange();
    try {
      let url = state.mode === 'detail'
        ? `/api/reports/daily?entity=${encodeURIComponent(entity)}&from=${from}&to=${to}&scope=shop`
        : `/api/reports/aggregate?entity=${encodeURIComponent(entity)}&from=${from}&to=${to}&group=${state.mode}`;
      if (state.shopFilter.size) url += `&shops=${encodeURIComponent(Array.from(state.shopFilter).join(','))}`;
      if (state.q) url += `&q=${encodeURIComponent(state.q)}`;
      const data = await jsonFetch(url, { signal: ctrl.signal });
      if (state.entity !== entity) return;
      state.rows = data.rows || [];
      state.summary = data.summary || null;
      renderKpis();
      renderTable();
    } catch (e) {
      if (e.name === 'AbortError') return;
      showToast('报表加载失败：' + e.message, 'error');
    }
  }

  // ---------- 连接状态 ----------

  async function refreshConn() {
    const badge = $('reportConnBadge');
    try {
      const data = await jsonFetch('/api/reports/status');
      state.conn = data.napos || null;
      state.entities = data.entities || [];
      if (!state.entity || !state.entities.some((e) => e.key === state.entity)) {
        const saved = LS.get('shanReports.entity', null);
        state.entity = (saved && state.entities.some((e) => e.key === saved)) ? saved : (state.entities[0] ? state.entities[0].key : null);
      }
      renderEntityTabs();
      renderShopOptions();
      const ok = state.conn && state.conn.connected;
      badge.textContent = ok ? '客户端已连接' : '客户端未连接';
      badge.className = 'badge ' + (ok ? 'badge-ok' : 'badge-fail');
      badge.title = ok
        ? `调试端口 ${state.conn.port}`
        : [state.conn && state.conn.error, state.conn && state.conn.hint].filter(Boolean).join('\n') || '未检测到调试端口';
    } catch {
      badge.textContent = '状态检测失败';
      badge.className = 'badge badge-fail';
    }
  }

  // ---------- 列设置 ----------

  function loadColumnPrefs() {
    const saved = LS.get('shanReports.columns.v1', null);
    const defaults = new Set(state.columns.filter((c) => !c.reserved).map((c) => c.key));
    if (Array.isArray(saved)) {
      const valid = new Set(state.columns.map((c) => c.key));
      state.visible = new Set(saved.filter((k) => valid.has(k)));
    } else {
      state.visible = defaults;
    }
    if (!state.visible.size) state.visible = defaults;
  }

  function renderColumnCfg() {
    const list = $('columnCfgList');
    list.innerHTML = '';
    for (const c of state.columns) {
      if (c.locked) continue;
      const label = document.createElement('label');
      label.className = 'colcfg-item';
      const checked = state.visible.has(c.key) ? 'checked' : '';
      label.innerHTML = `<input type="checkbox" value="${c.key}" ${checked}><span></span>${c.reserved ? '<em class="colcfg-reserved">预留</em>' : ''}`;
      label.querySelector('span').textContent = c.label;
      list.appendChild(label);
    }
  }

  function applyColumnCfg() {
    const picks = new Set();
    $('columnCfgList').querySelectorAll('input[type=checkbox]').forEach((cb) => {
      if (cb.checked) picks.add(cb.value);
    });
    state.visible = picks;
    LS.set('shanReports.columns.v1', Array.from(picks));
    $('modalReportColumns').hidden = true;
    renderTable();
  }

  // ---------- 同步 ----------

  function renderSyncProgress(st) {
    const pct = st.planTotal ? Math.round((st.done / st.planTotal) * 100) : 0;
    $('syncProgressBar').style.width = pct + '%';
    $('syncProgressText').textContent = `${st.done} / ${st.planTotal}`;
    $('syncStatAdded').textContent = `新增 ${st.added}`;
    $('syncStatUpdated').textContent = `更新 ${st.updated}`;
    $('syncStatFailed').textContent = `失败 ${st.failed}`;
    const steps = (st.steps || []).slice(-8);
    $('syncSteps').innerHTML = steps.map((s) => {
      const cls = s.ok ? 'ok' : 'fail';
      const detail = s.ok ? `+${s.added}/~${s.updated}` : (s.error || '失败').slice(0, 60);
      return `<div class="sync-step ${cls}"><span></span><em>${detail}</em></div>`;
    }).join('');
    const stepNames = $('syncSteps').querySelectorAll('.sync-step span');
    steps.forEach((s, i) => { stepNames[i].textContent = s.label; });
    $('btnSyncCancel').hidden = !st.running;
    $('btnStartSync').disabled = !!st.running;
    $('btnStartSync').textContent = st.running ? '同步中…' : '开始同步';
  }

  function pollSyncStatus() {
    if (state.syncPollTimer) clearInterval(state.syncPollTimer);
    state.syncPollTimer = setInterval(async () => {
      try {
        const st = await jsonFetch('/api/reports/sync/status');
        renderSyncProgress(st);
        if (!st.running) {
          clearInterval(state.syncPollTimer);
          state.syncPollTimer = null;
          if (st.error) showToast('同步出错：' + st.error, 'error');
          else showToast(st.cancelled ? '同步已取消' : `同步完成：新增 ${st.added}，更新 ${st.updated}`);
          refreshConn().then(loadReport);
        }
      } catch { /* 轮询失败忽略 */ }
    }, 900);
  }

  async function loadAutoSyncPrefs() {
    try {
      const s = await jsonFetch('/api/settings');
      $('autoSyncEnabled').checked = !!s.autoSyncEnabled;
      if (s.autoSyncTime) $('autoSyncTime').value = s.autoSyncTime;
    } catch { /* 设置读取失败时保留默认值 */ }
  }

  async function saveAutoSyncPrefs() {
    try {
      await jsonFetch('/api/settings', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ autoSyncEnabled: $('autoSyncEnabled').checked, autoSyncTime: $('autoSyncTime').value }),
      });
      showToast('自动同步设置已保存');
    } catch (e) {
      showToast('自动同步设置保存失败：' + e.message, 'error');
    }
  }

  async function openSyncModal() {
    $('modalReportSync').hidden = false;
    $('syncEntityBadge').textContent = '识别主体中…';
    $('syncEntityBadge').className = 'badge badge-info';
    $('syncShopPickWrap').hidden = true;
    $('syncProgressWrap').hidden = true;
    loadAutoSyncPrefs();
    try {
      const tree = await jsonFetch('/api/reports/tree');
      const badge = $('syncEntityBadge');
      badge.textContent = `当前主体：${(tree.entity && tree.entity.name) || (tree.merchant && tree.merchant.name) || '未知'} · 门店 ${(tree.shops || []).length} 家`;
      badge.className = 'badge badge-ok';
      if (tree.entity && tree.entity.key && tree.entity.key !== state.entity) {
        state.entity = tree.entity.key;
        LS.set('shanReports.entity', tree.entity.key);
      }
      await refreshConn();
      renderSyncShopOptions(tree.shops || []);
    } catch (e) {
      const badge = $('syncEntityBadge');
      badge.textContent = '未连接客户端：' + e.message;
      badge.className = 'badge badge-fail';
      try {
        const st = await jsonFetch('/api/reports/status');
        const napos = st.napos || {};
        $('syncHint').textContent = [napos.hint, napos.selfCheckUrl ? `自检：客户端带参启动后，用浏览器打开 ${napos.selfCheckUrl} 应看到一段 JSON。` : '']
          .filter(Boolean).join(' ');
      } catch { /* 服务不可达时保留默认文案 */ }
    }
  }

  function renderSyncShopOptions(shops) {
    state.syncShops.clear();
    fillShopMenu($('syncShopMenu'), shops);
    renderDropdownSelection($('syncShopMenu'), state.syncShops, $('syncShopText'), '选择门店');
  }

  async function startSync() {
    const scope = $('syncScope').value;
    const days = Number($('syncRange').value) || 30;
    const body = { from: daysAgoYmd(days), to: daysAgoYmd(1), scope: scope === 'custom' ? 'shop' : scope };
    if (scope === 'custom') {
      const shops = Array.from(state.syncShops).filter((v) => v !== '__all__');
      if (!shops.length) { showToast('请先选择要同步的门店', 'error'); return; }
      body.shopIds = shops;
    }
    try {
      await jsonFetch('/api/reports/sync', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(body),
      });
      $('syncProgressWrap').hidden = false;
      renderSyncProgress({ planTotal: 0, done: 0, added: 0, updated: 0, failed: 0, steps: [], running: true });
      pollSyncStatus();
    } catch (e) {
      showToast('同步启动失败：' + e.message, 'error');
    }
  }

  // ---------- 导出 ----------

  function exportCsv() {
    if (!state.entity) { showToast('暂无主体可导出', 'error'); return; }
    const { from, to } = currentRange();
    let url = `/api/reports/export?entity=${encodeURIComponent(state.entity)}&from=${from}&to=${to}`;
    if (state.mode !== 'detail') url += `&group=${state.mode}`;
    if (state.shopFilter.size) url += `&shops=${encodeURIComponent(Array.from(state.shopFilter).join(','))}`;
    if (state.q) url += `&q=${encodeURIComponent(state.q)}`;
    window.location.href = url;
  }

  function exportHtml() {
    if (!state.entity) { showToast('暂无主体可导出', 'error'); return; }
    const { from, to } = analysisRange();
    window.open(`/api/reports/report-html?entity=${encodeURIComponent(state.entity)}&from=${from}&to=${to}`, '_blank');
  }

  // ---------- 趋势图表 ----------

  function chartCol(key) {
    return state.columns.find((c) => c.key === key) || { key, label: key, type: 'num' };
  }

  function ensureChart(instanceKey, domId) {
    if (typeof echarts === 'undefined') return null;
    const dom = $(domId);
    if (!dom) return null;
    if (!chartInstances[instanceKey]) chartInstances[instanceKey] = echarts.init(dom);
    return chartInstances[instanceKey];
  }

  function metricColumnOptions() {
    return state.columns.filter((c) => ['int', 'money', 'pct', 'num'].includes(c.type) && !c.reserved);
  }

  function renderChartMetricSelect() {
    const sel = $('chartMetric');
    if (!sel) return;
    sel.innerHTML = '';
    for (const c of metricColumnOptions()) {
      const opt = document.createElement('option');
      opt.value = c.key;
      opt.textContent = c.label;
      if (c.key === chartMetric) opt.selected = true;
      sel.appendChild(opt);
    }
    if (!sel.value && sel.options.length) sel.value = sel.options[0].value;
    chartMetric = sel.value || 'grossAmt';
  }

  const AXIS_TXT = { axisLabel: { color: '#6b6560' }, axisLine: { lineStyle: { color: '#e8e4df' } } };
  const SPLIT_LINE = { lineStyle: { color: '#f0ede8' } };
  const ACCENT = '#ff6b35';

  async function ensureAnalysisData() {
    const { from, to } = analysisRange();
    const shopSuffix = state.analysisShopFilter.size
      ? `&shops=${encodeURIComponent(Array.from(state.analysisShopFilter).join(','))}`
      : '';
    const key = [state.entity, from, to, state.analysisShopFilter.size ? [...state.analysisShopFilter].sort().join(',') : ''].join('|');
    if (anaCache && anaCache.key === key) return anaCache;

    const fd = (s) => new Date(Number(String(s).slice(0, 4)), Number(String(s).slice(4, 6)) - 1, Number(String(s).slice(6, 8)));
    const spanDays = Math.max(1, Math.round((fd(to) - fd(from)) / 86400000) + 1);
    const prevToD = fd(from);
    prevToD.setDate(prevToD.getDate() - 1);
    const prevTo = ymdLocal(prevToD);
    const prevFromD = new Date(prevToD);
    prevFromD.setDate(prevFromD.getDate() - (spanDays - 1));
    const prevFrom = ymdLocal(prevFromD);

    const base = `/api/reports/aggregate?entity=${encodeURIComponent(state.entity)}`;
    const [byDate, byDatePrev, byShop, topDaily] = await Promise.all([
      jsonFetch(`${base}&from=${from}&to=${to}&group=date${shopSuffix}`).then((d) => d.rows || []),
      jsonFetch(`${base}&from=${prevFrom}&to=${prevTo}&group=date${shopSuffix}`).then((d) => d.rows || []),
      jsonFetch(`${base}&from=${from}&to=${to}&group=shop${shopSuffix}`).then((d) => d.rows || []),
      jsonFetch(`/api/reports/daily?entity=${encodeURIComponent(state.entity)}&from=${from}&to=${to}&scope=shop${shopSuffix}`).then((d) => d.rows || []),
    ]);
    anaCache = { key, from, to, prevFrom, prevTo, byDate, byDatePrev, byShop, topDaily };
    return anaCache;
  }

  function renderDeltas(data) {
    const wrap = $('analysisDeltas');
    if (!wrap) return;
    wrap.innerHTML = '';
    const sum = (rows, f) => rows.reduce((a, r) => a + (Number(r[f]) || 0), 0);
    const wAvg = (rows, f, wb) => {
      let num = 0, den = 0;
      for (const r of rows) { const wt = Number(r[wb]) || 0; num += (Number(r[f]) || 0) * wt; den += wt; }
      return den > 0 ? num / den : 0;
    };
    const curOrders = sum(data.byDate, 'validOrderCnt');
    const prevOrders = sum(data.byDatePrev, 'validOrderCnt');
    const items = [
      { label: '营业额', cur: sum(data.byDate, 'grossAmt'), prev: sum(data.byDatePrev, 'grossAmt'), fmt: fmtMoney },
      { label: '有效订单', cur: curOrders, prev: prevOrders, fmt: fmtNum },
      { label: '收入', cur: sum(data.byDate, 'incomeAmt'), prev: sum(data.byDatePrev, 'incomeAmt'), fmt: fmtMoney },
      { label: '曝光人数', cur: sum(data.byDate, 'expUv'), prev: sum(data.byDatePrev, 'expUv'), fmt: fmtNum },
      { label: '下单人数', cur: sum(data.byDate, 'orderUserCnt'), prev: sum(data.byDatePrev, 'orderUserCnt'), fmt: fmtNum },
      { label: '进店转化率', cur: wAvg(data.byDate, 'clkExpRate', 'expUv'), prev: wAvg(data.byDatePrev, 'clkExpRate', 'expUv'), fmt: fmtPct },
      { label: '客单价', cur: curOrders > 0 ? sum(data.byDate, 'grossAmt') / curOrders : 0, prev: prevOrders > 0 ? sum(data.byDatePrev, 'grossAmt') / prevOrders : 0, fmt: fmtMoney },
    ];
    for (const it of items) {
      const cur = Math.round(it.cur * 100) / 100;
      const div = document.createElement('div');
      div.className = 'delta-card';
      let deltaHtml;
      const delta = it.prev > 0 ? (it.cur - it.prev) / it.prev : null;
      if (delta == null || !Number.isFinite(delta)) deltaHtml = '<span class="delta-none">上期无数据</span>';
      else if (Math.abs(delta) < 0.0001) deltaHtml = '<span class="delta-flat">持平</span>';
      else {
        const up = delta > 0;
        deltaHtml = `<span class="delta ${up ? 'up' : 'down'}">${up ? '↑' : '↓'} ${Math.abs(delta * 100).toFixed(1)}%</span>`
          + `<span class="delta-sub">vs 上期 ${it.fmt(Math.round(it.prev * 100) / 100)}</span>`;
      }
      div.innerHTML = `<span class="delta-label"></span><span class="delta-value"></span><span class="delta-line">${deltaHtml}</span>`;
      div.querySelector('.delta-label').textContent = it.label;
      div.querySelector('.delta-value').textContent = it.fmt(cur);
      wrap.appendChild(div);
    }
  }

  async function renderCharts() {
    let data;
    try { data = await ensureAnalysisData(); } catch { return; }
    renderDeltas(data);
    const col = chartCol(chartMetric);
    const compareOn = $('anaComparePrev') && $('anaComparePrev').checked;

    const trend = ensureChart('trend', 'chartTrend');
    if (trend) {
      const cur = data.byDate.slice().sort((a, b) => (a.date < b.date ? -1 : 1));
      const prev = data.byDatePrev.slice().sort((a, b) => (a.date < b.date ? -1 : 1));
      const xData = cur.map((r) => ymdToDash(r.date));
      const series = [{
        name: `本期·${col.label}`, type: 'line', smooth: true, symbolSize: 5,
        data: cur.map((r) => Number(r[chartMetric]) || 0),
        itemStyle: { color: ACCENT }, lineStyle: { width: 2.5 },
        areaStyle: { color: 'rgba(255,107,53,.08)' },
      }];
      if (compareOn && prev.length) {
        series.push({
          name: '上期同期', type: 'line', smooth: true,
          data: xData.map((_, i) => (prev[i] ? Number(prev[i][chartMetric]) || 0 : 0)),
          itemStyle: { color: '#a5a09a' }, lineStyle: { type: 'dashed', width: 1.6 }, symbol: 'none',
        });
      }
      trend.setOption({
        tooltip: { trigger: 'axis', valueFormatter: (v) => fmtByCol(col, v) },
        legend: { data: series.map((x) => x.name), top: 0, icon: 'roundRect', itemWidth: 14, itemHeight: 4, textStyle: { color: '#6b6560' } },
        grid: { left: 64, right: 24, top: 36, bottom: 30 },
        xAxis: { type: 'category', boundaryGap: false, data: xData, ...AXIS_TXT },
        yAxis: { type: 'value', axisLabel: { color: '#6b6560' }, splitLine: SPLIT_LINE },
        series,
      }, true);
      const title = $('anaTrendTitle');
      if (title) title.textContent = `主指标趋势 · ${col.label}（${ymdToDash(data.from)} ~ ${ymdToDash(data.to)}）`;
    }

    const rank = ensureChart('rank', 'chartRank');
    if (rank) {
      const top = data.byShop.slice()
        .sort((a, b) => (Number(b[chartMetric]) || 0) - (Number(a[chartMetric]) || 0))
        .slice(0, 10).reverse();
      rank.setOption({
        tooltip: { trigger: 'axis', valueFormatter: (v) => fmtByCol(col, v) },
        grid: { left: 10, right: 34, top: 10, bottom: 24, containLabel: true },
        xAxis: { type: 'value', axisLabel: { color: '#6b6560' }, splitLine: SPLIT_LINE },
        yAxis: {
          type: 'category', data: top.map((r) => r.shopName || r.shopId),
          axisLabel: { color: '#2b2a28', width: 130, overflow: 'truncate' },
          axisLine: { lineStyle: { color: '#e8e4df' } },
        },
        series: [{ type: 'bar', barMaxWidth: 18, data: top.map((r) => Number(r[chartMetric]) || 0), itemStyle: { color: ACCENT, borderRadius: [0, 6, 6, 0] } }],
      }, true);
    }

    const funnel = ensureChart('funnel', 'chartFunnel');
    if (funnel) {
      const sum = (f) => data.byDate.reduce((a, r) => a + (Number(r[f]) || 0), 0);
      const expUv = sum('expUv');
      const enter = data.byDate.reduce((a, r) => a + (Number(r.expUv) || 0) * (Number(r.clkExpRate) || 0), 0);
      const order = sum('orderUserCnt');
      funnel.setOption({
        tooltip: { trigger: 'item', formatter: (p) => `${p.name}：${fmtNum(Math.round(p.value))} 人` },
        series: [{
          type: 'funnel', left: '8%', width: '84%', top: 12, bottom: 8, minSize: '20%',
          label: { color: '#fff', fontWeight: 600, formatter: (p) => `${p.name}  ${fmtNum(Math.round(p.value))}` },
          data: [
            { name: '曝光人数', value: Math.round(expUv), itemStyle: { color: '#ffb199' } },
            { name: '进店人数', value: Math.round(enter), itemStyle: { color: '#ff8a5c' } },
            { name: '下单人数', value: Math.round(order), itemStyle: { color: ACCENT } },
          ],
        }],
      }, true);
    }

    const compare = ensureChart('compare', 'chartCompare');
    if (compare) {
      const top5 = data.byShop.slice()
        .sort((a, b) => (Number(b[chartMetric]) || 0) - (Number(a[chartMetric]) || 0))
        .slice(0, 5);
      const dates = [...new Set(data.topDaily.map((r) => r.date))].sort();
      const palette = ['#ff6b35', '#2563eb', '#1a8a4c', '#b8860b', '#8b5cf6'];
      const series = top5.map((shop, i) => ({
        name: shop.shopName || shop.shopId,
        type: 'line', smooth: true, symbolSize: 4,
        data: dates.map((d) => {
          const r = data.topDaily.find((x) => x.date === d && String(x.shopId) === String(shop.shopId));
          return r ? (Number(r[chartMetric]) || 0) : 0;
        }),
        itemStyle: { color: palette[i % palette.length] }, lineStyle: { width: 2 },
      }));
      compare.setOption({
        tooltip: { trigger: 'axis', valueFormatter: (v) => fmtByCol(col, v) },
        legend: { top: 0, type: 'scroll', icon: 'roundRect', itemWidth: 14, itemHeight: 4, textStyle: { color: '#6b6560' } },
        grid: { left: 64, right: 24, top: 36, bottom: 30 },
        xAxis: { type: 'category', boundaryGap: false, data: dates.map(ymdToDash), ...AXIS_TXT },
        yAxis: { type: 'value', axisLabel: { color: '#6b6560' }, splitLine: SPLIT_LINE },
        series,
      }, true);
      const title = $('anaCompareTitle');
      if (title) title.textContent = `门店对比 · Top ${top5.length}（${col.label}）`;
    }
  }

  // ---------- 智能问数 · 机器人（仅经营分析页面） ----------

  // 对话历史按主体持久化到 localStorage，刷新/重开后可继续追问
  const CHAT_LS_KEY = 'shanReports.chat.v1';
  const chatStoreKey = () => state.entity || '_';

  function loadChatForEntity() {
    const all = LS.get(CHAT_LS_KEY, {});
    state.chat.messages = Array.isArray(all[chatStoreKey()]) ? all[chatStoreKey()] : [];
    if (state.chat.open) renderChatMessages();
  }

  function saveChatForEntity() {
    const key = chatStoreKey();
    const all = LS.get(CHAT_LS_KEY, {});
    const trimmed = state.chat.messages.filter((m) => !m.pending).slice(-20);
    const attempt = (payload) => {
      try { localStorage.setItem(CHAT_LS_KEY, JSON.stringify(payload)); return true; } catch { return false; }
    };
    if (attempt({ ...all, [key]: trimmed })) return;
    // 图表行数据可能撑爆配额 → 退化为只存文字与图表配置
    const slim = { ...all, [key]: trimmed.map((m) => ({ ...m, rows: undefined })) };
    if (!(attempt(slim) || attempt({ [key]: slim[key].slice(-10) }))) { /* 配额不足则放弃持久化 */ }
  }

  function chatVisibleFor(view) { return view === 'reports' || view === 'analysis'; }

  function setChatOpen(open) {
    state.chat.open = open;
    $('chatbotPanel').hidden = !open;
    $('chatbotFab').classList.toggle('active', open);
    if (open) {
      loadChatForEntity();
      $('chatbotFab').hidden = false;
      setTimeout(() => $('chatbotInput').focus(), 60);
      scrollChatBottom();
    }
  }

  function scrollChatBottom() {
    const body = $('chatbotBody');
    body.scrollTop = body.scrollHeight;
  }

  function renderChatMessages() {
    const body = $('chatbotBody');
    [...body.querySelectorAll('.chatbot-msg:not(.static)')].forEach((n) => n.remove());
    body.querySelectorAll('.chatbot-chips').forEach((n) => { n.hidden = state.chat.messages.length > 0; });
    for (let i = 0; i < state.chat.messages.length; i++) {
      const m = state.chat.messages[i];
      const div = document.createElement('div');
      div.className = 'chatbot-msg ' + (m.role === 'user' ? 'user' : 'bot');
      if (m.pending) {
        div.innerHTML = '<div class="chatbot-bubble typing"><span></span><span></span><span></span></div>';
      } else {
        const bubble = document.createElement('div');
        bubble.className = 'chatbot-bubble';
        bubble.textContent = m.text || '';
        div.appendChild(bubble);
        if (m.chart && m.chart.type !== 'none' && m.rows && m.rows.length) {
          const chartWrap = document.createElement('div');
          chartWrap.className = 'chatbot-chart';
          chartWrap.dataset.idx = String(i);
          div.appendChild(chartWrap);
          const actions = document.createElement('div');
          actions.className = 'chatbot-msg-actions';
          const applyBtn = document.createElement('button');
          applyBtn.type = 'button';
          applyBtn.className = 'btn btn-ghost btn-small';
          applyBtn.textContent = '应用到报表';
          applyBtn.addEventListener('click', () => applyMsgQuery(i));
          actions.appendChild(applyBtn);
          div.appendChild(actions);
        }
      }
      body.appendChild(div);
    }
    scrollChatBottom();
    // 渲染消息内图表
    state.chat.messages.forEach((m, i) => {
      if (m.pending || !m.chart || m.chart.type === 'none' || !m.rows || !m.rows.length) return;
      const wrap = body.querySelector(`.chatbot-chart[data-idx="${i}"]`);
      if (!wrap) return;
      const col = (key) => (state.columns.find((c) => c.key === key) || { label: key, type: 'num' });
      const isDate = m.chart.x === 'date';
      const rows = m.rows.slice();
      if (isDate) rows.sort((a, b) => (String(a.date) < String(b.date) ? -1 : 1));
      const chart = echarts.init(wrap);
      chart.setOption({
        tooltip: { trigger: 'axis' },
        grid: { left: 56, right: 16, top: 20, bottom: m.chart.type === 'bar' && !isDate ? 52 : 24 },
        xAxis: {
          type: 'category',
          data: rows.map((r) => (isDate ? ymdToDash(r.date) : (r.shopName || r.shopId))),
          axisLabel: { color: '#6b6560', interval: 0, rotate: m.chart.type === 'bar' && !isDate ? 30 : 0, width: 80, overflow: 'truncate' },
          axisLine: { lineStyle: { color: '#e8e4df' } },
        },
        yAxis: { type: 'value', axisLabel: { color: '#6b6560' }, splitLine: { lineStyle: { color: '#f0ede8' } } },
        series: (m.chart.y || []).map((key, yi) => {
          const c = col(key);
          return {
            name: c.label || key,
            type: m.chart.type === 'line' ? 'line' : 'bar',
            smooth: true, barMaxWidth: 26,
            data: rows.map((r) => {
              const v = r[key];
              if (v == null || v === '') return 0;
              const n = Number(v);
              return c.type === 'pct' ? +(n * 100).toFixed(2) : n;
            }),
            itemStyle: { color: yi === 0 ? '#ff6b35' : '#2563eb' },
          };
        }),
      });
      setTimeout(() => chart.resize(), 40);
    });
  }

  function applyMsgQuery(idx) {
    const m = state.chat.messages[idx];
    const a = m && m.applied;
    if (!a) return;
    state.mode = ['detail', 'shop', 'date'].includes(a.mode) ? a.mode : 'shop';
    $('reportViewModes').querySelectorAll('button').forEach((b) => b.classList.toggle('active', b.dataset.mode === state.mode));
    state.preset = 'custom';
    $('reportRangePreset').value = 'custom';
    $('reportCustomRange').hidden = false;
    $('reportFromDate').value = ymdToDash(a.from);
    $('reportToDate').value = ymdToDash(a.to);
    state.shopFilter = new Set((a.shopIds || []).map(String));
    renderShopOptions();
    loadReport();
    const nav = document.querySelector('.nav-item[data-view="reports"]');
    if (nav) nav.click();
  }

  async function sendChat(text) {
    const q = String(text || '').trim();
    if (!q || state.chat.busy) return;
    state.chat.busy = true;
    state.chat.messages.push({ role: 'user', text: q });
    state.chat.messages.push({ role: 'assistant', pending: true });
    renderChatMessages();
    $('chatbotInput').value = '';
    try {
      const history = state.chat.messages
        .filter((m) => !m.pending && (m.role === 'user' || (m.role === 'assistant' && m.text)))
        .slice(0, -1)
        .slice(-8)
        .map((m) => ({ role: m.role, content: m.role === 'assistant' ? `${m.text}${m.applied ? `（已查询：mode=${m.applied.mode} ${m.applied.from}~${m.applied.to}${m.applied.shopIds && m.applied.shopIds.length ? ' 门店 ' + m.applied.shopIds.join(',') : ''}）` : ''}` : m.text }));
      const result = await jsonFetch('/api/reports/ask', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ entity: state.entity, q, history }),
      });
      const pendingIdx = state.chat.messages.findIndex((m) => m.pending);
      const msg = {
        role: 'assistant',
        text: result.reply || '（模型未给出文字回答）',
        chart: result.chart,
        rows: result.rows,
        applied: result.applied,
        chartTitle: result.chartTitle,
      };
      if (pendingIdx >= 0) state.chat.messages.splice(pendingIdx, 1, msg);
      else state.chat.messages.push(msg);
      saveChatForEntity();
    } catch (e) {
      const pendingIdx = state.chat.messages.findIndex((m) => m.pending);
      const errMsg = { role: 'assistant', text: '出错了：' + e.message, error: true };
      if (pendingIdx >= 0) state.chat.messages.splice(pendingIdx, 1, errMsg);
      else state.chat.messages.push(errMsg);
    } finally {
      state.chat.busy = false;
      renderChatMessages();
    }
  }

  // ---------- 事件绑定 ----------

  function bindEvents() {
    $('btnReportRefresh').addEventListener('click', async () => {
      await refreshConn();
      await loadReport();
      showToast('已刷新');
    });

    $('btnClientHelp').addEventListener('click', (event) => {
      event.stopPropagation();
      const pop = $('clientHelpPopover');
      pop.hidden = !pop.hidden;
      $('btnClientHelp').classList.toggle('active', !pop.hidden);
      $('btnClientHelp').setAttribute('aria-expanded', String(!pop.hidden));
    });
    document.addEventListener('click', (event) => {
      const pop = $('clientHelpPopover');
      if (!pop.hidden && !event.target.closest('.conn-help-wrap')) {
        pop.hidden = true;
        $('btnClientHelp').classList.remove('active');
        $('btnClientHelp').setAttribute('aria-expanded', 'false');
      }
    });

    $('btnOpenSync').addEventListener('click', openSyncModal);
    $('btnCloseSync').addEventListener('click', () => {
      $('modalReportSync').hidden = true;
      if (state.syncPollTimer) { clearInterval(state.syncPollTimer); state.syncPollTimer = null; }
      $('syncProgressWrap').hidden = true;
    });
    $('btnCancelSync').addEventListener('click', () => $('modalReportSync').hidden = true);
    $('btnStartSync').addEventListener('click', startSync);
    $('btnSyncCancel').addEventListener('click', async () => {
      try { await jsonFetch('/api/reports/sync/cancel', { method: 'POST' }); showToast('已请求取消，等待当前步骤结束…'); } catch { /* ignore */ }
    });
    $('syncScope').addEventListener('change', () => {
      $('syncShopPickWrap').hidden = $('syncScope').value !== 'custom';
    });
    $('autoSyncEnabled').addEventListener('change', saveAutoSyncPrefs);
    $('autoSyncTime').addEventListener('change', saveAutoSyncPrefs);
    $('syncShopTrigger').addEventListener('click', () => toggleDropdown('syncShopMenu', 'syncShopTrigger'));
    $('syncShopMenu').addEventListener('click', makeDropdownHandler($('syncShopMenu'), state.syncShops, $('syncShopText'), '选择门店'));
    document.addEventListener('click', (event) => {
      if (!$('syncShopDropdown').contains(event.target)) toggleDropdown('syncShopMenu', 'syncShopTrigger', false);
    });

    $('reportRangePreset').addEventListener('change', () => {
      state.preset = $('reportRangePreset').value;
      $('reportCustomRange').hidden = state.preset !== 'custom';
      loadReport();
    });
    $('reportFromDate').addEventListener('change', loadReport);
    $('reportToDate').addEventListener('change', loadReport);

    $('reportShopTrigger').addEventListener('click', () => toggleDropdown('reportShopMenu', 'reportShopTrigger'));
    $('reportShopMenu').addEventListener('click', makeDropdownHandler($('reportShopMenu'), state.shopFilter, $('reportShopText'), '全部门店', loadReport));
    document.addEventListener('click', (event) => {
      if (!$('reportShopDropdown').contains(event.target)) toggleDropdown('reportShopMenu', 'reportShopTrigger', false);
    });

    $('reportViewModes').addEventListener('click', (event) => {
      const btn = event.target.closest('button[data-mode]');
      if (!btn) return;
      state.mode = btn.dataset.mode;
      $('reportViewModes').querySelectorAll('button').forEach((b) => b.classList.toggle('active', b === btn));
      state.sortKey = state.mode === 'detail' ? 'date' : (state.mode === 'shop' ? 'shopName' : 'date');
      state.sortDir = 'desc';
      loadReport();
    });

    let searchTimer = null;
    $('reportSearch').addEventListener('input', () => {
      clearTimeout(searchTimer);
      searchTimer = setTimeout(() => {
        state.q = $('reportSearch').value.trim();
        loadReport();
      }, 300);
    });

    $('btnColumnCfg').addEventListener('click', () => {
      renderColumnCfg();
      $('modalReportColumns').hidden = false;
    });
    $('btnCloseColumnCfg').addEventListener('click', () => $('modalReportColumns').hidden = true);
    $('btnApplyColumns').addEventListener('click', applyColumnCfg);
    $('btnResetColumns').addEventListener('click', () => {
      state.visible = new Set(state.columns.filter((c) => !c.reserved).map((c) => c.key));
      LS.set('shanReports.columns.v1', Array.from(state.visible));
      renderColumnCfg();
      renderTable();
    });

    $('btnExportCsv').addEventListener('click', exportCsv);
    $('btnExportHtml').addEventListener('click', exportHtml);

    $('reportTableHead').addEventListener('click', (event) => {
      const th = event.target.closest('th[data-key]');
      if (!th) return;
      const key = th.dataset.key;
      if (state.sortKey === key) state.sortDir = state.sortDir === 'asc' ? 'desc' : 'asc';
      else { state.sortKey = key; state.sortDir = 'desc'; }
      renderTable();
    });

    // 趋势图表
    $('analysisRangePreset').addEventListener('change', () => {
      state.analysisPreset = $('analysisRangePreset').value;
      anaCache = null;
      renderCharts();
    });
    $('anaShopTrigger').addEventListener('click', () => toggleDropdown('anaShopMenu', 'anaShopTrigger'));
    $('anaShopMenu').addEventListener('click', makeDropdownHandler($('anaShopMenu'), state.analysisShopFilter, $('anaShopText'), '全部门店', () => {
      anaCache = null;
      renderCharts();
    }));
    document.addEventListener('click', (event) => {
      if (!$('anaShopDropdown').contains(event.target)) toggleDropdown('anaShopMenu', 'anaShopTrigger', false);
    });
    $('chartMetric').addEventListener('change', () => {
      chartMetric = $('chartMetric').value || 'grossAmt';
      LS.set('shanReports.chartMetric', chartMetric);
      renderCharts();
    });
    $('anaComparePrev').addEventListener('change', renderCharts);

    // 智能问数机器人
    $('chatbotFab').addEventListener('click', () => setChatOpen(!state.chat.open));
    $('btnChatClose').addEventListener('click', () => setChatOpen(false));
    $('btnChatClear').addEventListener('click', () => {
      state.chat.messages = [];
      const all = LS.get(CHAT_LS_KEY, {});
      delete all[state.entity || '_'];
      LS.set(CHAT_LS_KEY, all);
      renderChatMessages();
    });
    $('btnChatSend').addEventListener('click', () => sendChat($('chatbotInput').value));
    $('chatbotInput').addEventListener('keydown', (event) => {
      if (event.key === 'Enter') sendChat($('chatbotInput').value);
    });
    $('chatbotChips').addEventListener('click', (event) => {
      const chip = event.target.closest('[data-q]');
      if (chip) sendChat(chip.dataset.q);
    });

    window.addEventListener('resize', () => {
      Object.values(chartInstances).forEach((c) => { if (c) c.resize(); });
    });
  }

  // ---------- 初始化 ----------

  window.shanReportsInit = async function () {
    if (!state.inited) {
      state.inited = true;
      bindEvents();
      try {
        const data = await jsonFetch('/api/reports/columns');
        state.columns = data.columns || [];
      } catch { state.columns = []; }
      loadColumnPrefs();
      renderChartMetricSelect();
    }
    await refreshConn();
    await loadReport();
  };

  window.shanAnalysisActivate = async function () {
    await window.shanReportsInit();
    renderChartMetricSelect();
    await renderCharts();
    Object.values(chartInstances).forEach((c) => { if (c) c.resize(); });
  };

  window.shanSetAnalysisVisible = function (visible) {
    const fab = $('chatbotFab');
    if (!fab) return;
    fab.hidden = !visible;
    if (!visible) setChatOpen(false);
  };

})();