'use strict';

// 经营驾驶舱：KPI + 趋势 / 门店排行 / 转化漏斗 / 收入结构
// 数据来自 GET /api/ops/dashboard（服务端已按统一口径聚合）
(function () {
  const $ = (id) => document.getElementById(id);
  const COLORS = { main: '#ff6b35', soft: '#ffb08a', grey: '#b8b2ad', green: '#2e7d4f', red: '#c0392b' };

  const KPI_DEFS = [
    { key: 'revenue', label: '营业额', unit: 'money' },
    { key: 'orders', label: '有效订单', unit: 'int' },
    { key: 'avgTicket', label: '客单价', unit: 'money' },
    { key: 'exposure', label: '曝光人数', unit: 'int' },
    { key: 'conversion', label: '进店转化率', unit: 'rate' },
    { key: 'rating', label: '店铺评分', unit: 'num' },
  ];

  const state = {
    inited: false,
    loading: false,
    data: null,
    from: '',
    to: '',
    schools: null,
    shops: null,
    charts: {},
    insightPoints: [],
  };

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

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

  function inputToYmd(value) {
    return String(value || '').replace(/-/g, '');
  }

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

  function fmtValue(value, unit) {
    if (value === null || value === undefined) return '–';
    const n = Number(value);
    if (!Number.isFinite(n)) return '–';
    if (unit === 'rate') return (n * 100).toFixed(2) + '%';
    if (unit === 'num') return n.toFixed(2);
    if (unit === 'money') return n.toLocaleString('zh-CN', { minimumFractionDigits: 2, maximumFractionDigits: 2 });
    return n.toLocaleString('zh-CN');
  }

  function fmtDelta(delta, unit) {
    if (delta === null || delta === undefined) return '<span class="ckpt-delta muted">—</span>';
    const up = delta > 0;
    const cls = delta === 0 ? 'muted' : (up ? 'up' : 'down');
    const arrow = delta === 0 ? '' : (up ? '↑' : '↓');
    const text = unit === 'pp' ? Math.abs(delta).toFixed(1) + 'pp' : Math.abs(delta).toFixed(1) + '%';
    return `<span class="ckpt-delta ${cls}">${arrow} ${text}</span>`;
  }

  async function api(url, options) {
    const res = await fetch(url, options);
    const body = await res.json().catch(() => null);
    return { res, body };
  }

  // ---------- 骨架 ----------

  function renderShell() {
    const root = $('cockpitRoot');
    if (!root) return;
    root.innerHTML = `
      <div class="ops-bar ckpt-bar">
        <div class="ops-bar-group">
          <span class="ops-bar-label">日期</span>
          <input type="date" class="ops-input" id="ckptFrom">
          <span class="ops-tilde">~</span>
          <input type="date" class="ops-input" id="ckptTo">
        </div>
        <div class="ops-bar-group"><span class="ops-bar-label">学校</span><div class="ops-multi" id="ckptSchool"></div></div>
        <div class="ops-bar-group"><span class="ops-bar-label">店铺</span><div class="ops-multi" id="ckptShop"></div></div>
      </div>
      <section class="ckpt-ai" id="ckptAi">
        <div class="ckpt-ai-head">
          <div class="ckpt-ai-title"><span class="ckpt-ai-badge">AI</span><h3>经营解读</h3><span class="ckpt-ai-meta" id="ckptAiMeta"></span></div>
          <div class="ckpt-ai-actions">
            <button class="btn btn-ghost btn-small" id="ckptAiCopy" hidden>复制</button>
            <button class="btn btn-primary btn-small" id="ckptAiBtn">生成解读</button>
          </div>
        </div>
        <div class="ckpt-ai-body" id="ckptAiBody">点击「生成解读」，模型会根据当前筛选范围的数据给出结论与建议。</div>
      </section>
      <div class="ckpt-kpis" id="ckptKpis"></div>
      <div class="ckpt-grid">
        <section class="ckpt-card"><div class="ckpt-card-head"><h3>营业额 / 订单趋势</h3><span id="ckptTrendNote"></span></div><div class="ckpt-chart" id="ckptTrend"></div></section>
        <section class="ckpt-card"><div class="ckpt-card-head"><h3>门店营业额 Top 10</h3><span></span></div><div class="ckpt-chart" id="ckptRank"></div></section>
        <section class="ckpt-card"><div class="ckpt-card-head"><h3>转化漏斗</h3><span>曝光 → 进店 → 下单</span></div><div class="ckpt-chart" id="ckptFunnel"></div></section>
        <section class="ckpt-card"><div class="ckpt-card-head"><h3>收入结构</h3><span>收入 / 支出 / 补贴</span></div><div class="ckpt-chart" id="ckptStructure"></div></section>
      </div>
      <div class="ckpt-empty" id="ckptEmpty" hidden>
        <p>所选范围没有数据</p>
        <small>调整日期，或换一个学校 / 店铺</small>
      </div>`;

    $('ckptAiBtn').addEventListener('click', () => requestInsight(true));
    $('ckptAiCopy').addEventListener('click', () => {
      const text = state.insightPoints.join('\n');
      if (!text) return;
      navigator.clipboard.writeText(text).then(() => {
        const btn = $('ckptAiCopy');
        btn.textContent = '已复制';
        setTimeout(() => { btn.textContent = '复制'; }, 1500);
      }).catch(() => {});
    });

    $('ckptFrom').addEventListener('change', (e) => { state.from = inputToYmd(e.target.value); loadData(); });
    $('ckptTo').addEventListener('change', (e) => { state.to = inputToYmd(e.target.value); loadData(); });

    state.charts.trend = echarts.init($('ckptTrend'));
    state.charts.rank = echarts.init($('ckptRank'));
    state.charts.funnel = echarts.init($('ckptFunnel'));
    state.charts.structure = echarts.init($('ckptStructure'));

    window.bindMultiSelectDismiss();
    window.addEventListener('resize', () => {
      Object.values(state.charts).forEach((chart) => chart && chart.resize());
    });
  }

  function mountFilters(summary) {
    const schools = (summary.schools || []).map((s) => ({ key: s.name, label: s.name, hint: `${s.shopCount} 家` }));
    window.createMultiSelect($('ckptSchool'), {
      label: '学校',
      items: schools,
      selected: state.schools ? [...state.schools] : [],
      allowEmpty: true,
      emptyLabel: '全部',
      onChange: (keys) => { state.schools = keys.length ? new Set(keys) : null; loadData(); },
    });

    const shops = (summary.shops || []).map((s) => ({
      key: String(s.key || s.shopId || ''),
      label: s.shopName || s.key,
      hint: s.school || '',
    })).filter((i) => i.key);
    window.createMultiSelect($('ckptShop'), {
      label: '店铺',
      items: shops,
      selected: state.shops ? [...state.shops] : [],
      allowEmpty: true,
      emptyLabel: '全部',
      onChange: (keys) => { state.shops = keys.length ? new Set(keys) : null; loadData(); },
    });
  }

  // ---------- 渲染 ----------

  function renderKpis(kpis) {
    const box = $('ckptKpis');
    if (!box) return;
    if (!kpis) {
      box.innerHTML = '';
      return;
    }
    box.innerHTML = KPI_DEFS.map((def) => {
      const item = kpis[def.key] || { value: null, delta: null, unit: def.unit };
      return `<div class="ckpt-kpi">
        <div class="ckpt-kpi-label">${def.label}</div>
        <div class="ckpt-kpi-value">${fmtValue(item.value, def.unit)}</div>
        <div class="ckpt-kpi-foot">${fmtDelta(item.delta, def.unit)}<span class="ckpt-kpi-hint">较上期</span></div>
      </div>`;
    }).join('');
  }

  function renderTrend(data) {
    const chart = state.charts.trend;
    const dates = data.trend.map((t) => shortDate(t.date));
    chart.setOption({
      grid: { left: 56, right: 52, top: 24, bottom: 32 },
      tooltip: { trigger: 'axis' },
      legend: { right: 0, top: 0, itemWidth: 10, itemHeight: 10, textStyle: { fontSize: 11 } },
      xAxis: { type: 'category', data: dates, axisLine: { lineStyle: { color: '#e5e0da' } }, axisTick: { show: false }, axisLabel: { color: '#8f8880' } },
      yAxis: [
        { type: 'value', splitLine: { lineStyle: { color: '#f2efea' } }, axisLabel: { color: '#8f8880' } },
        { type: 'value', splitLine: { show: false }, axisLabel: { color: '#8f8880' } },
      ],
      series: [
        { name: '营业额', type: 'bar', barMaxWidth: 28, itemStyle: { color: COLORS.main, borderRadius: [4, 4, 0, 0] }, data: data.trend.map((t) => t.revenue) },
        { name: '订单', type: 'line', yAxisIndex: 1, smooth: true, symbolSize: 6, lineStyle: { width: 2, color: '#7a9cc6' }, itemStyle: { color: '#7a9cc6' }, data: data.trend.map((t) => t.orders) },
      ],
    }, true);
  }

  function renderRanking(data) {
    const rows = data.ranking.slice().reverse();
    state.charts.rank.setOption({
      grid: { left: 8, right: 48, top: 10, bottom: 10, containLabel: true },
      tooltip: { trigger: 'axis', axisPointer: { type: 'shadow' } },
      xAxis: { type: 'value', splitLine: { lineStyle: { color: '#f2efea' } }, axisLabel: { color: '#8f8880' } },
      yAxis: {
        type: 'category',
        data: rows.map((r) => r.shopName),
        axisLine: { show: false },
        axisTick: { show: false },
        axisLabel: { color: '#5f5852', width: 150, overflow: 'truncate', fontSize: 11 },
      },
      series: [{
        type: 'bar',
        barMaxWidth: 16,
        itemStyle: { color: COLORS.soft, borderRadius: [0, 4, 4, 0] },
        label: {
          show: true,
          position: 'right',
          fontSize: 11,
          color: '#6f6862',
          formatter: (p) => Number(p.value).toLocaleString('zh-CN', { maximumFractionDigits: 0 }),
        },
        data: rows.map((r) => r.revenue),
      }],
    }, true);
  }

  function renderFunnel(data) {
    const f = data.funnel;
    const stages = [
      { name: '曝光', value: f.exposure },
      { name: '进店', value: f.visit },
      { name: '下单', value: f.order },
    ];
    const rate = (a, b) => (b > 0 ? ((a / b) * 100).toFixed(1) + '%' : '—');
    state.charts.funnel.setOption({
      tooltip: { trigger: 'item', formatter: (p) => `${p.name}：${Number(p.value).toLocaleString('zh-CN')}` },
      series: [{
        type: 'funnel',
        left: '8%',
        right: '8%',
        top: 16,
        bottom: 16,
        minSize: '28%',
        sort: 'descending',
        gap: 4,
        label: {
          show: true,
          position: 'inside',
          color: '#fff',
          fontSize: 12,
          formatter: (p) => `${p.name} ${Number(p.value).toLocaleString('zh-CN')}`,
        },
        itemStyle: { borderWidth: 0 },
        color: [COLORS.main, '#ff9a70', '#ffc4a8'],
        data: stages,
      }],
      graphic: [
        { type: 'text', right: 10, top: 8, style: { text: `进店 ${rate(f.visit, f.exposure)}`, fill: '#8f8880', fontSize: 11 } },
        { type: 'text', right: 10, bottom: 8, style: { text: `下单 ${rate(f.order, f.visit)}`, fill: '#8f8880', fontSize: 11 } },
      ],
    }, true);
  }

  function renderStructure(data) {
    const dates = data.structure.map((s) => shortDate(s.date));
    state.charts.structure.setOption({
      grid: { left: 56, right: 20, top: 28, bottom: 32 },
      tooltip: { trigger: 'axis' },
      legend: { right: 0, top: 0, itemWidth: 10, itemHeight: 10, textStyle: { fontSize: 11 } },
      xAxis: { type: 'category', data: dates, axisLine: { lineStyle: { color: '#e5e0da' } }, axisTick: { show: false }, axisLabel: { color: '#8f8880' } },
      yAxis: { type: 'value', splitLine: { lineStyle: { color: '#f2efea' } }, axisLabel: { color: '#8f8880' } },
      series: [
        { name: '收入', type: 'bar', barMaxWidth: 22, itemStyle: { color: COLORS.main, borderRadius: [3, 3, 0, 0] }, data: data.structure.map((s) => s.income) },
        { name: '支出', type: 'bar', barMaxWidth: 22, itemStyle: { color: '#c9c2ba', borderRadius: [3, 3, 0, 0] }, data: data.structure.map((s) => s.expense) },
        { name: '补贴', type: 'bar', barMaxWidth: 22, itemStyle: { color: '#ffd6c2', borderRadius: [3, 3, 0, 0] }, data: data.structure.map((s) => s.subsidy) },
      ],
    }, true);
  }

  // ---------- AI 解读 ----------

  async function requestInsight(refresh) {
    const body = $('ckptAiBody');
    const btn = $('ckptAiBtn');
    if (!body || !btn) return;
    btn.disabled = true;
    btn.textContent = '分析中…';
    body.innerHTML = '<span class="ckpt-ai-loading">AI 正在读取数据并生成结论…</span>';
    $('ckptAiMeta').textContent = '';
    $('ckptAiCopy').hidden = true;

    const payload = {
      from: state.from,
      to: state.to,
      schools: state.schools ? [...state.schools].join(',') : '',
      shops: state.shops ? [...state.shops].join(',') : '',
      refresh: !!refresh,
    };
    try {
      const { res, body: data } = await api('/api/ops/insights', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(payload),
      });
      if (!res.ok) throw new Error((data && (data.detail || data.error)) || ('HTTP ' + res.status));
      if (data && data.enabled === false) {
        body.innerHTML = '未配置对话模型。请到「系统设置 → API 设置」选择对话模型并填写 Key，然后回到这里重新生成。';
        return;
      }
      if (data && data.note) {
        body.textContent = data.note;
        return;
      }
      const points = (data && data.points) || [];
      if (!points.length) {
        body.textContent = '模型没有返回有效结论，请稍后重试。';
        return;
      }
      state.insightPoints = points;
      body.innerHTML = `<ul class="ckpt-ai-list">${points.map((point) => `<li>${esc(point)}</li>`).join('')}</ul>`;
      const time = data.generatedAt ? new Date(data.generatedAt).toLocaleTimeString('zh-CN', { hour: '2-digit', minute: '2-digit' }) : '';
      $('ckptAiMeta').textContent = [data.model, time, data.cached ? '缓存' : ''].filter(Boolean).join(' · ');
      $('ckptAiCopy').hidden = false;
    } catch (e) {
      body.innerHTML = `<span class="ckpt-ai-error">生成失败：${esc(e.message || e)}</span>`;
    } finally {
      btn.disabled = false;
      btn.textContent = refresh ? '重新生成' : '生成解读';
    }
  }

  // ---------- 数据 ----------

  async function loadData() {
    if (state.loading) return;
    state.loading = true;
    const params = new URLSearchParams();
    if (state.from) params.set('from', state.from);
    if (state.to) params.set('to', state.to);
    if (state.schools && state.schools.size) params.set('schools', [...state.schools].join(','));
    if (state.shops && state.shops.size) params.set('shops', [...state.shops].join(','));
    try {
      const { res, body } = await api('/api/ops/dashboard?' + params.toString());
      if (!res.ok) throw new Error((body && (body.detail || body.error)) || ('HTTP ' + res.status));
      state.data = body;
      const empty = !body.kpis || !body.trend.length;
      $('ckptEmpty').hidden = !empty;
      $('ckptKpis').hidden = empty;
      document.querySelector('.ckpt-grid').hidden = empty;
      if (!empty) {
        state.from = body.from || state.from;
        state.to = body.to || state.to;
        $('ckptFrom').value = ymdToInput(state.from);
        $('ckptTo').value = ymdToInput(state.to);
        renderKpis(body.kpis);
        renderTrend(body);
        renderRanking(body);
        renderFunnel(body);
        renderStructure(body);
        $('ckptTrendNote').textContent = body.prev ? `对比 ${shortDate(body.prev.from)} ~ ${shortDate(body.prev.to)}` : '暂无上期可比';
        if (state.insightPoints.length) {
          state.insightPoints = [];
          $('ckptAiBody').innerHTML = '筛选范围已变化，点击「生成解读」重新分析。';
          $('ckptAiMeta').textContent = '';
          $('ckptAiCopy').hidden = true;
        }
        Object.values(state.charts).forEach((chart) => chart && chart.resize());
      }
    } catch (e) {
      $('ckptEmpty').hidden = false;
      $('ckptEmpty').querySelector('p').textContent = '驾驶舱加载失败';
      $('ckptEmpty').querySelector('small').textContent = e.message || String(e);
    } finally {
      state.loading = false;
    }
  }

  /** 数据变更后刷新：重拉筛选选项与聚合数据，不重建图表 */
  async function refresh() {
    const { body } = await api('/api/ops/summary');
    if (!body || !body.enabled) return;
    // 清理已不存在于新数据的筛选值
    const schoolNames = new Set((body.schools || []).map((s) => s.name));
    if (state.schools) {
      const next = new Set([...state.schools].filter((name) => schoolNames.has(name)));
      state.schools = next.size ? next : null;
    }
    const shopKeys = new Set((body.shops || []).map((s) => String(s.key || s.shopId)));
    if (state.shops) {
      const next = new Set([...state.shops].filter((key) => shopKeys.has(key)));
      state.shops = next.size ? next : null;
    }
    mountFilters(body);
    await loadData();
  }

  async function init() {
    if (state.inited) return;
    state.inited = true;
    renderShell();
    const { body } = await api('/api/ops/summary');
    const summary = body || { enabled: false, schools: [], shops: [] };
    if (summary.enabled) {
      if (summary.coverage) {
        state.from = summary.coverage.from || '';
        state.to = summary.coverage.to || '';
        $('ckptFrom').value = ymdToInput(state.from);
        $('ckptTo').value = ymdToInput(state.to);
      }
      mountFilters(summary);
      await loadData();
    } else {
      $('ckptEmpty').hidden = false;
      $('ckptEmpty').querySelector('p').textContent = '数据暂不可用';
      $('ckptEmpty').querySelector('small').textContent = summary.reason || '存储未连接';
    }
  }

  window.addEventListener('ops:data-changed', () => {
    if (state.inited) refresh();
  });

  window.shanCockpitInit = function () {
    init();
    const refresh = $('btnCockpitRefresh');
    if (refresh && !refresh.dataset.bound) {
      refresh.dataset.bound = '1';
      refresh.addEventListener('click', () => loadData());
    }
  };
})();