'use strict';

// 经营报告：同一份 Report JSON 渲染「图文报告 / 交互报告」，PDF 走浏览器打印样式。
// 数据来自 GET /api/ops/report（后端算指标、规则打标，模型只负责文字）。
(function () {
  const $ = (id) => document.getElementById(id);
  const COLORS = { main: '#ff6b35', soft: '#ffb08a', grey: '#c9c2ba', blue: '#7a9cc6', light: '#ffd6c2' };

  const state = {
    inited: false,
    loading: false,
    report: null,
    mode: 'text', // text | interactive
    from: '',
    to: '',
    charts: {},
  };

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

  function moneyText(v) {
    if (v == null) return '–';
    const n = Number(v);
    return Number.isFinite(n) ? n.toLocaleString('zh-CN', { minimumFractionDigits: 2, maximumFractionDigits: 2 }) : '–';
  }

  function kpiText(kpi) {
    if (kpi.current == null) return '–';
    if (kpi.unit === '%') return kpi.current + '%';
    if (kpi.unit === '单' || kpi.unit === '人') return numText(kpi.current);
    return moneyText(kpi.current);
  }

  function numText(v) {
    if (v == null) return '–';
    const n = Number(v);
    return Number.isFinite(n) ? n.toLocaleString('zh-CN') : '–';
  }

  function deltaText(kpi) {
    if (kpi.change_pct == null) return '<span class="rp-delta muted">—</span>';
    const up = kpi.change_pct > 0;
    const cls = kpi.change_pct === 0 ? 'muted' : up ? 'up' : 'down';
    const unit = kpi.unit === '%' ? 'pp' : '%';
    return `<span class="rp-delta ${cls}">${up ? '↑' : '↓'} ${Math.abs(kpi.change_pct).toFixed(1)}${unit}</span>`;
  }

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

  // ---------- 渲染 ----------

  function renderShell() {
    const root = $('reportRoot');
    if (!root) return;
    root.innerHTML = `
      <div class="rp-toolbar">
        <div class="rp-range">
          <input type="date" class="ops-input" id="rpFrom">
          <span class="ops-tilde">~</span>
          <input type="date" class="ops-input" id="rpTo">
        </div>
        <div class="rp-tabs" id="rpTabs">
          <button type="button" data-mode="text" class="on">图文报告</button>
          <button type="button" data-mode="interactive">交互报告</button>
        </div>
        <div class="rp-actions">
          <button type="button" class="btn btn-ghost btn-small" id="rpArchive">历史报告</button>
          <button type="button" class="btn btn-ghost btn-small" id="rpSave">保存报告</button>
          <button type="button" class="btn btn-ghost btn-small" id="rpRefresh">重新生成</button>
          <button type="button" class="btn btn-primary btn-small" id="rpPrint">下载 PDF</button>
        </div>
      </div>
      <article class="rp-page" id="rpPage"></article>
      <div class="modal-overlay" id="rpHistoryModal" hidden>
        <div class="modal rp-history-modal">
          <div class="modal-header">
            <div class="modal-title"><span>历史报告</span></div>
            <button class="modal-close" id="rpHistoryClose" type="button" aria-label="关闭">×</button>
          </div>
          <div class="modal-body" id="rpHistoryList"></div>
        </div>
      </div>`;
    root.querySelectorAll('#rpTabs [data-mode]').forEach((btn) => {
      btn.addEventListener('click', () => {
        state.mode = btn.dataset.mode;
        root.querySelectorAll('#rpTabs [data-mode]').forEach((b) => b.classList.toggle('on', b === btn));
        $('rpPage').classList.toggle('interactive', state.mode === 'interactive');
        if (state.report) drawCharts(state.report);
      });
    });
    $('rpFrom').addEventListener('change', (e) => { state.from = String(e.target.value || '').replace(/-/g, ''); load(true); });
    $('rpTo').addEventListener('change', (e) => { state.to = String(e.target.value || '').replace(/-/g, ''); load(true); });
    $('rpRefresh').addEventListener('click', () => load(true));
    $('rpPrint').addEventListener('click', () => window.print());
    $('rpSave').addEventListener('click', saveReport);
    $('rpArchive').addEventListener('click', openHistory);
    $('rpHistoryClose').addEventListener('click', () => { $('rpHistoryModal').hidden = true; });
  }

  function renderCover(report) {
    const meta = report.meta || {};
    return `
      <header class="rp-cover">
        <div class="rp-cover-main">
          <div class="rp-kicker">AI 经营分析报告</div>
          <h1>${esc(meta.title || '经营分析报告')}</h1>
          <div class="rp-cover-sub">${esc(meta.organization || '')}${meta.organization ? ' · ' : ''}${esc(meta.period_start)} ~ ${esc(meta.period_end)}</div>
        </div>
        <div class="rp-cover-meta">
          <div><span>统计范围</span><b>${esc(meta.data_scope || '–')}</b></div>
          <div><span>数据来源</span><b>${esc((meta.source_files || []).join('、') || '平台导出明细')}</b></div>
          <div><span>生成时间</span><b>${esc(new Date(meta.generated_at).toLocaleString('zh-CN'))}</b></div>
        </div>
      </header>`;
  }

  function renderSummary(report) {
    const summary = report.executive_summary || {};
    const dot = { positive: 'ok', neutral: 'na', warning: 'warn', critical: 'bad' };
    const items = (summary.key_findings || []).map((f) => `
      <li>
        <span class="rp-dot ${dot[f.severity] || 'na'}"></span>
        <div>
          <b>${esc(f.finding)}</b>
          <p>${esc(f.interpretation || '')}</p>
          ${(f.evidence || []).length ? `<div class="rp-evidence">${f.evidence.map((e) => `<code>${esc(e)}</code>`).join('')}</div>` : ''}
        </div>
      </li>`).join('');
    return `
      <section class="rp-section rp-summary">
        <h2>管理层摘要</h2>
        <p class="rp-lead">${esc(summary.overall_assessment || '')}</p>
        <ul class="rp-findings">${items}</ul>
      </section>`;
  }

  function renderKpis(report) {
    return `
      <section class="rp-section">
        <h2>核心指标</h2>
        <div class="rp-kpis">
          ${(report.kpis || []).map((kpi) => `
            <div class="rp-kpi" title="${esc(kpi.definition)}">
              <div class="rp-kpi-label">${esc(kpi.label)}<span>${esc(kpi.unit)}</span></div>
              <div class="rp-kpi-value">${kpiText(kpi)}</div>
              <div class="rp-kpi-foot">${deltaText(kpi)}<span class="rp-kpi-hint">较上期</span></div>
            </div>`).join('')}
        </div>
        <p class="rp-note">口径：${(report.kpis || []).map((k) => `${k.label}＝${k.definition}`).join('；')}</p>
      </section>`;
  }

  function chartCard(id, title, subtitle) {
    return `<figure class="rp-figure">
      <figcaption><b>${esc(title)}</b><span>${esc(subtitle || '')}</span></figcaption>
      <div class="rp-chart" id="${id}"></div>
    </figure>`;
  }

  function renderSections(report) {
    const chartById = new Map((report.charts || []).map((c) => [c.id, c]));
    const tableById = new Map((report.tables || []).map((t) => [t.id, t]));
    return (report.sections || []).map((section, index) => {
      if (section.id === 'quality') return '';
      const charts = (section.chart_ids || []).map((id) => chartById.get(id)).filter(Boolean);
      const tables = (section.table_ids || []).map((id) => tableById.get(id)).filter(Boolean);
      return `
        <section class="rp-section">
          <h2><em>${String(index + 1).padStart(2, '0')}</em>${esc(section.title)}</h2>
          ${section.summary ? `<p class="rp-lead">${esc(section.summary)}</p>` : ''}
          ${(section.paragraphs || []).map((p) => `<p>${esc(p)}</p>`).join('')}
          ${charts.map((chart) => chartCard(`rpChart_${chart.id}`, chart.title, chart.description)).join('')}
          ${tables.map((table) => renderTable(table)).join('')}
        </section>`;
    }).join('');
  }

  function renderTable(table) {
    return `
      <div class="rp-table-wrap">
        <table class="rp-table">
          <thead><tr>${table.columns.map((c) => `<th>${esc(c.label)}</th>`).join('')}</tr></thead>
          <tbody>${(table.rows || []).map((row) => `<tr>${table.columns.map((c) => {
            const v = row[c.key];
            const text = c.key === 'revenue' ? moneyText(v) : c.key === 'share' ? (v == null ? '–' : v + '%') : (v == null ? '–' : esc(v));
            return `<td>${text}</td>`;
          }).join('')}</tr>`).join('')}</tbody>
        </table>
        ${table.footnote ? `<p class="rp-note">${esc(table.footnote)}</p>` : ''}
      </div>`;
  }

  function renderAlerts(report) {
    const alerts = report.alerts || [];
    const plan = report.action_plan || [];
    return `
      <section class="rp-section">
        <h2><em>05</em>风险与建议</h2>
        <div class="rp-alerts">
          ${alerts.map((a) => `
            <div class="rp-alert ${esc(a.severity)}">
              <div class="rp-alert-head"><span class="rp-badge">${esc(a.severity)}</span><b>${esc(a.title)}</b></div>
              <ul>${(a.evidence || []).map((e) => `<li>${esc(e)}</li>`).join('')}</ul>
              ${(a.hypotheses || []).length ? `<p class="rp-note">待验证：${a.hypotheses.map(esc).join('、')}</p>` : ''}
            </div>`).join('') || '<p class="rp-note">本期未触发风险规则。</p>'}
        </div>
        <h3 class="rp-h3">行动计划</h3>
        <table class="rp-table">
          <thead><tr><th>优先级</th><th>行动</th><th>负责人</th><th>时间窗</th><th>验收指标</th></tr></thead>
          <tbody>${plan.map((p) => `<tr>
            <td><span class="rp-badge">${esc(p.priority)}</span></td>
            <td>${esc(p.action)}</td>
            <td>${esc(p.owner_role)}</td>
            <td>${esc(p.time_horizon)}</td>
            <td>${esc(p.success_metric)}</td>
          </tr>`).join('')}</tbody>
        </table>
      </section>`;
  }

  function renderQuality(report) {
    const q = report.data_quality || {};
    return `
      <section class="rp-section rp-quality">
        <h2><em>06</em>数据质量与方法论</h2>
        <p><b>覆盖范围：</b>${esc(q.coverage || '–')}</p>
        <p><b>可比性：</b>${esc(q.comparability || '–')}</p>
        ${(q.warnings || []).length ? `<p><b>提示：</b>${q.warnings.map(esc).join('；')}</p>` : ''}
        ${(q.missing_metrics || []).length ? `<p><b>缺失指标：</b>${q.missing_metrics.map(esc).join('；')}</p>` : ''}
        <p><b>方法论：</b></p>
        <ul class="rp-method">${(report.methodology || []).map((m) => `<li>${esc(m)}</li>`).join('')}</ul>
      </section>`;
  }

  function renderReport(report) {
    const page = $('rpPage');
    page.innerHTML = [
      renderCover(report),
      renderSummary(report),
      renderKpis(report),
      renderSections(report),
      renderAlerts(report),
      renderQuality(report),
      `<footer class="rp-footer">${report.ai && report.ai.source === 'llm' ? `文字由 AI 生成（${esc(report.ai.model || '')}）` : '当前为规则版文字'}；数值均由后端按统一口径计算。${report.aiError ? ' ' + esc(report.aiError) : ''}</footer>`,
    ].join('');
    drawCharts(report);
  }

  // ---------- 图表 ----------

  function chartBase(interactive) {
    return {
      animation: !interactive,
      silent: !interactive,
      tooltip: interactive ? { trigger: 'axis' } : undefined,
    };
  }

  function drawCharts(report) {
    const interactive = state.mode === 'interactive';
    const byId = new Map((report.charts || []).map((c) => [c.id, c]));
    Object.values(state.charts).forEach((chart) => chart && chart.dispose());
    state.charts = {};

    const mount = (chart) => {
      const el = $(`rpChart_${chart.id}`);
      if (!el) return null;
      const instance = echarts.init(el);
      state.charts[chart.id] = instance;
      return instance;
    };

    const trend = byId.get('chart_trend');
    if (trend) {
      const chart = mount(trend);
      chart && chart.setOption({
        ...chartBase(interactive),
        grid: { left: 56, right: 48, top: 24, bottom: 30 },
        legend: { right: 0, top: 0, itemWidth: 10, itemHeight: 10, textStyle: { fontSize: 11 } },
        xAxis: { type: 'category', data: trend.data.map((d) => d.date.slice(4)), axisTick: { show: false }, axisLine: { lineStyle: { color: '#e5e0da' } } },
        yAxis: [{ type: 'value', splitLine: { lineStyle: { color: '#f2efea' } } }, { type: 'value', splitLine: { show: false } }],
        series: [
          { name: '营业额', type: 'bar', barMaxWidth: 22, itemStyle: { color: COLORS.main, borderRadius: [3, 3, 0, 0] }, data: trend.data.map((d) => d.revenue) },
          { name: '订单', type: 'line', yAxisIndex: 1, symbolSize: 5, lineStyle: { width: 2, color: COLORS.blue }, itemStyle: { color: COLORS.blue }, data: trend.data.map((d) => d.orders) },
        ],
      });
    }

    const rank = byId.get('chart_rank');
    if (rank) {
      const rows = rank.data.slice().reverse();
      const chart = mount(rank);
      chart && chart.setOption({
        ...chartBase(interactive),
        grid: { left: 8, right: 60, top: 10, bottom: 10, containLabel: true },
        xAxis: { type: 'value', splitLine: { lineStyle: { color: '#f2efea' } } },
        yAxis: { type: 'category', data: rows.map((r) => r.shopName), axisTick: { show: false }, axisLine: { show: false }, axisLabel: { width: 140, overflow: 'truncate', fontSize: 11 } },
        series: [{ type: 'bar', barMaxWidth: 14, itemStyle: { color: COLORS.soft, borderRadius: [0, 3, 3, 0] }, label: { show: true, position: 'right', fontSize: 10, color: '#6f6862' }, data: rows.map((r) => r.revenue) }],
      });
    }

    const funnel = byId.get('chart_funnel');
    if (funnel) {
      const f = funnel.data;
      const chart = mount(funnel);
      chart && chart.setOption({
        ...chartBase(interactive),
        series: [{
          type: 'funnel', left: '10%', right: '10%', top: 12, bottom: 12, minSize: '30%', gap: 3,
          label: { show: true, position: 'inside', color: '#fff', fontSize: 11, formatter: (p) => `${p.name} ${Number(p.value).toLocaleString('zh-CN')}` },
          itemStyle: { borderWidth: 0 },
          color: [COLORS.main, '#ff9a70', COLORS.light],
          data: [{ name: '曝光', value: f.exposure }, { name: '进店', value: f.visit }, { name: '下单', value: f.order }],
        }],
      });
    }

    const structure = byId.get('chart_structure');
    if (structure) {
      const chart = mount(structure);
      chart && chart.setOption({
        ...chartBase(interactive),
        grid: { left: 56, right: 20, top: 28, bottom: 30 },
        legend: { right: 0, top: 0, itemWidth: 10, itemHeight: 10, textStyle: { fontSize: 11 } },
        xAxis: { type: 'category', data: structure.data.map((d) => d.date.slice(4)), axisTick: { show: false }, axisLine: { lineStyle: { color: '#e5e0da' } } },
        yAxis: { type: 'value', splitLine: { lineStyle: { color: '#f2efea' } } },
        series: [
          { name: '收入', type: 'bar', barMaxWidth: 18, itemStyle: { color: COLORS.main }, data: structure.data.map((d) => d.income) },
          { name: '支出', type: 'bar', barMaxWidth: 18, itemStyle: { color: COLORS.grey }, data: structure.data.map((d) => d.expense) },
          { name: '补贴', type: 'bar', barMaxWidth: 18, itemStyle: { color: COLORS.light }, data: structure.data.map((d) => d.subsidy) },
        ],
      });
    }
  }

  // ---------- 报告中心 ----------

  async function saveReport() {
    const btn = $('rpSave');
    btn.disabled = true;
    btn.textContent = '保存中…';
    try {
      const { res, body } = await api('/api/ops/reports', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ from: state.from, to: state.to }),
      });
      if (!res.ok) throw new Error((body && (body.detail || body.error)) || ('HTTP ' + res.status));
      btn.textContent = '已保存';
      setTimeout(() => { btn.textContent = '保存报告'; btn.disabled = false; }, 1500);
    } catch (e) {
      btn.textContent = '保存报告';
      btn.disabled = false;
      alert('保存失败：' + (e.message || e));
    }
  }

  async function openHistory() {
    $('rpHistoryModal').hidden = false;
    await renderHistory();
  }

  async function renderHistory() {
    const list = $('rpHistoryList');
    list.innerHTML = '<div class="rp-loading" style="padding:24px 0">加载中…</div>';
    const { res, body } = await api('/api/ops/reports');
    if (!res.ok) {
      list.innerHTML = `<div class="rp-loading">读取失败：${esc((body && (body.error || body.detail)) || res.status)}</div>`;
      return;
    }
    const reports = (body && body.reports) || [];
    if (!reports.length) {
      list.innerHTML = '<div class="rp-loading" style="padding:24px 0">还没有保存过报告</div>';
      return;
    }
    list.innerHTML = `<table class="rp-table">
      <thead><tr><th>保存时间</th><th>区间</th><th>来源</th><th>关键指标</th><th class="rp-col-actions">操作</th></tr></thead>
      <tbody>${reports.map((r) => `<tr>
        <td>${esc(new Date(r.createdAt).toLocaleString('zh-CN'))}</td>
        <td>${esc(r.from)} ~ ${esc(r.to)}</td>
        <td>${r.source === 'llm' ? 'AI 生成' : '规则生成'}</td>
        <td class="rp-history-kpis">${(r.kpis || []).map((k) => `${esc(k.label)} ${esc(k.current)}`).join(' · ')}</td>
        <td class="rp-col-actions">
          <button type="button" class="btn btn-ghost btn-small" data-view="${esc(r.id)}">查看</button>
          <button type="button" class="btn btn-ghost btn-small" data-del="${esc(r.id)}">删除</button>
        </td>
      </tr>`).join('')}</tbody>
    </table>`;
    list.querySelectorAll('[data-view]').forEach((btn) => {
      btn.addEventListener('click', () => loadSaved(btn.dataset.view));
    });
    list.querySelectorAll('[data-del]').forEach((btn) => {
      btn.addEventListener('click', async () => {
        if (!confirm('删除这份历史报告？')) return;
        btn.disabled = true;
        await api('/api/ops/reports/' + encodeURIComponent(btn.dataset.del), { method: 'DELETE' });
        renderHistory();
      });
    });
  }

  async function loadSaved(id) {
    const { res, body } = await api('/api/ops/reports/' + encodeURIComponent(id));
    if (!res.ok || !body || !body.report) {
      alert('读取失败');
      return;
    }
    const report = body.report;
    state.report = report;
    const from = String(report.meta.period_start || '').replace(/-/g, '');
    const to = String(report.meta.period_end || '').replace(/-/g, '');
    state.from = from;
    state.to = to;
    $('rpFrom').value = String(report.meta.period_start || '');
    $('rpTo').value = String(report.meta.period_end || '');
    renderReport(report);
    $('rpHistoryModal').hidden = true;
  }

  // ---------- 数据 ----------

  async function load(force) {
    if (state.loading) return;
    state.loading = true;
    const page = $('rpPage');
    if (page && !state.report) page.innerHTML = '<div class="rp-loading">正在生成报告…</div>';
    try {
      const params = new URLSearchParams();
      if (state.from) params.set('from', state.from);
      if (state.to) params.set('to', state.to);
      params.set('ai', '1'); // 默认走 AI，失败自动退回规则版
      const { res, body } = await api('/api/ops/report?' + params.toString());
      if (!res.ok) throw new Error((body && (body.detail || body.error)) || ('HTTP ' + res.status));
      if (body.empty) {
        page.innerHTML = '<div class="rp-loading">所选范围没有数据，请先导入明细。</div>';
        return;
      }
      state.report = body.report;
      renderReport(state.report);
    } catch (e) {
      page.innerHTML = `<div class="rp-loading">报告生成失败：${esc(e.message || e)}</div>`;
    } finally {
      state.loading = false;
    }
  }

  async function initDates() {
    const search = new URLSearchParams(location.search);
    const qFrom = String(search.get('from') || '').replace(/\D/g, '');
    const qTo = String(search.get('to') || '').replace(/\D/g, '');
    const toInput = (ymd) => `${ymd.slice(0, 4)}-${ymd.slice(4, 6)}-${ymd.slice(6, 8)}`;
    if (/^\d{8}$/.test(qFrom) && /^\d{8}$/.test(qTo)) {
      state.from = qFrom;
      state.to = qTo;
      $('rpFrom').value = toInput(qFrom);
      $('rpTo').value = toInput(qTo);
      return;
    }
    const { body } = await api('/api/ops/summary');
    const coverage = body && body.coverage;
    if (!coverage) return;
    const to = coverage.to;
    const d = new Date(Date.UTC(Number(to.slice(0, 4)), Number(to.slice(4, 6)) - 1, Number(to.slice(6, 8)) - 6));
    const from = `${d.getUTCFullYear()}${String(d.getUTCMonth() + 1).padStart(2, '0')}${String(d.getUTCDate()).padStart(2, '0')}`;
    state.to = to;
    state.from = from < coverage.from ? coverage.from : from;
    $('rpFrom').value = toInput(state.from);
    $('rpTo').value = toInput(state.to);
  }

  window.shanReportInit = function () {
    if (!state.inited) {
      state.inited = true;
      renderShell();
      initDates().then(() => load());
      window.addEventListener('resize', () => {
        Object.values(state.charts).forEach((chart) => chart && chart.resize());
      });
      window.addEventListener('beforeprint', () => {
        Object.values(state.charts).forEach((chart) => chart && chart.resize());
      });
    }
  };
})();