'use strict';

// 数据中台页：本地湖全景 + 云端同步（推送/拉取）
// 读取 GET /api/reports/lake；推送逐主体执行（POST /api/reports/aitable/push）。
(function () {
  const $ = (id) => document.getElementById(id);
  let inited = false;
  let loading = false;

  function fmtDate(ymd) {
    const s = String(ymd || '');
    return /^\d{8}$/.test(s) ? `${s.slice(0, 4)}-${s.slice(4, 6)}-${s.slice(6, 8)}` : (s || '–');
  }

  function fmtTime(iso) {
    if (!iso) return '–';
    const d = new Date(iso);
    return Number.isNaN(d.getTime()) ? String(iso) : `${d.getMonth() + 1}/${d.getDate()} ${String(d.getHours()).padStart(2, '0')}:${String(d.getMinutes()).padStart(2, '0')}`;
  }

  function esc(value) {
    const div = document.createElement('div');
    div.textContent = String(value ?? '');
    return div.innerHTML;
  }

  function setBadge(id, text, cls) {
    const badge = $(id);
    if (!badge) return;
    badge.textContent = text;
    badge.className = 'badge ' + (cls || 'badge-info');
  }

  function renderKpis(data) {
    $('lakeEntityCount').textContent = data.entities.length;
    $('lakeRowCount').textContent = data.totalRows;
    $('lakeCoverage').textContent = data.coverage ? `${fmtDate(data.coverage.from)} ~ ${fmtDate(data.coverage.to)}` : '–';
    const lastSyncs = data.entities.map((e) => e.lastSync && e.lastSync.at).filter(Boolean).sort();
    $('lakeLastSync').textContent = lastSyncs.length ? fmtTime(lastSyncs[lastSyncs.length - 1]) : '–';
    $('lakeRowsBadge').textContent = `${data.entities.length} 主体`;
  }

  function renderEntities(entities) {
    const tbody = $('lakeEntityRows');
    // 空湖：与明细 tab 同款 .empty-hint 空态（图标+标题+引导文案），表格整体隐藏
    $('lakeEntityTable').hidden = !entities.length;
    $('lakeEmpty').hidden = !!entities.length;
    if (!entities.length) return;
    tbody.innerHTML = entities.map((e) => {
      const cov = e.coverage ? `${fmtDate(e.coverage.from)} ~ ${fmtDate(e.coverage.to)}` : '–';
      const sync = e.lastSync ? `${fmtTime(e.lastSync.at)}（${fmtDate(e.lastSync.from)}~${fmtDate(e.lastSync.to)}）${e.lastSync.ok ? '' : ' ⚠'}` : '–';
      const push = e.lastPush ? `${fmtTime(e.lastPush.at)} / ${e.lastPush.pushedRows || 0} 行` : '未推送';
      const pending = typeof e.pending === 'number' && e.pending > 0 ? `<span class="badge badge-warn">待推 ${e.pending} 行</span>` : '';
      return `<tr>
        <td>${esc(e.name || e.key)}</td>
        <td>${e.shopCount || 0} / ${e.chainCount || 0}</td>
        <td>${e.rows}</td>
        <td>${e.byScope.company || 0}</td>
        <td>${e.byScope.chain || 0}</td>
        <td>${e.byScope.shop || 0}</td>
        <td>${e.byScope.summary || 0}</td>
        <td>${cov}</td>
        <td>${esc(sync)}</td>
        <td>${esc(push)} ${pending}</td>
      </tr>`;
    }).join('');
  }

  async function loadLake() {
    if (loading) return;
    loading = true;
    try {
      const res = await fetch('/api/reports/lake');
      const data = await res.json();
      if (!res.ok) throw new Error(data.error || `HTTP ${res.status}`);
      renderKpis(data);
      renderEntities(data.entities);
      if (!data.aitable.enabled) setBadge('lakeSyncBadge', '云端同步未启用（系统设置）', 'badge-info');
      else if (!data.aitable.operatorConfigured) setBadge('lakeSyncBadge', '云端配置不完整', 'badge-fail');
      else setBadge('lakeSyncBadge', '云端就绪', 'badge-ok');
    } catch (error) {
      setBadge('lakeSyncBadge', `加载失败：${error.message}`, 'badge-fail');
    } finally {
      loading = false;
    }
  }

  // 推送动作在数据采集页（取数机的动作）；中台只负责看数与从云端拉取
  async function pullAll() {
    const btn = $('btnLakePull');
    btn.disabled = true;
    try {
      await window.shanAitableAction('pull', 'lakeSyncBadge', {});
      await loadLake();
    } catch { /* 徽标已由 aitableAction 写入 */ } finally {
      btn.disabled = false;
    }
  }

  // 页内 tab：湖全景 / 明细数据（明细区首次激活时才初始化报表浏览，懒加载）
  function activateLakeTab(tab) {
    const tabs = $('lakeTabs');
    if (!tabs) return;
    tabs.querySelectorAll('button').forEach((b) => b.classList.toggle('active', b.dataset.tab === tab));
    $('lakeTabOverview').hidden = tab !== 'overview';
    $('lakeTabDetail').hidden = tab !== 'detail';
    if (tab === 'overview') loadLake();
    else if (window.shanReportsInit) window.shanReportsInit();
  }

  window.shanLakeInit = function () {
    if (!inited) {
      inited = true;
      $('btnLakeRefresh').addEventListener('click', loadLake);
      $('btnLakePull').addEventListener('click', pullAll);
      $('lakeTabs').addEventListener('click', (event) => {
        const btn = event.target.closest('button[data-tab]');
        if (btn) activateLakeTab(btn.dataset.tab);
      });
      // 「?」弹窗：与采集页连接帮助同款交互（点按钮开合，点外部关闭）
      const helpBtn = $('btnLakeHelp');
      const helpPop = $('lakeHelpPopover');
      if (helpBtn && helpPop) {
        helpBtn.addEventListener('click', (event) => {
          event.stopPropagation();
          helpPop.hidden = !helpPop.hidden;
          helpBtn.classList.toggle('active', !helpPop.hidden);
          helpBtn.setAttribute('aria-expanded', String(!helpPop.hidden));
        });
        document.addEventListener('click', (event) => {
          if (!helpPop.hidden && !event.target.closest('.conn-help-wrap')) {
            helpPop.hidden = true;
            helpBtn.classList.remove('active');
            helpBtn.setAttribute('aria-expanded', 'false');
          }
        });
      }
    }
    activateLakeTab('overview');
  };

  // 供问数「应用到报表」等外部入口直接落到明细 tab
  window.shanLakeShowDetail = function () {
    activateLakeTab('detail');
  };
})();