/**
 * 支付中心概览：区间筛选 + 指标卡 + ECharts 图表（成交趋势 / 分类成交 / 支付方式）+ 转化与退款 + 热销排行。
 *
 * 首屏报表来自页面内 #aksrt-pay-overview-data（PayOverview 输出），之后切换区间 / 分类请求
 * GET aksrt/v1/admin/pay-overview（PayOverviewController）。ECharts 子集由
 * assets/js/runtime/libs/echarts-pay.min.js 提供（window.echarts）。仅本页入队。
 */
(function () {
  'use strict';

  var root = document.querySelector('.aksrt-po-page');
  var dataEl = document.getElementById('aksrt-pay-overview-data');
  if (!root || !dataEl || !window.echarts) return;

  var boot;
  try { boot = JSON.parse(dataEl.textContent || '{}'); } catch (e) { return; }

  var echarts = window.echarts;
  var i18n = boot.i18n || {};
  var currency = boot.currency || '';
  var COLORS = { paid: '#18a058', net: '#2080f0', refund: '#d03050', count: '#f0a020' };
  var PALETTE = ['#18a058', '#2080f0', '#f0a020', '#8a63d2', '#86909c', '#13c2c2', '#eb2f96'];
  var TEXT = '#4e5969', MUTED = '#86909c', LINE = '#f0f1f4';

  var state = { from: boot.initial.from, to: boot.initial.to, group: boot.initial.group || '', report: boot.initial.report };
  var charts = {};
  var reqSeq = 0;

  /* ---------------- 格式化 ---------------- */

  function money(v) {
    return currency + Number(v || 0).toLocaleString(undefined, { minimumFractionDigits: 2, maximumFractionDigits: 2 });
  }
  function int(v) { return Number(v || 0).toLocaleString(); }
  function compact(v) {
    var n = Math.abs(v);
    if (n >= 1e8) return (v / 1e8).toFixed(1).replace(/\.0$/, '') + '亿';
    if (n >= 1e4) return (v / 1e4).toFixed(1).replace(/\.0$/, '') + '万';
    return String(Math.round(v * 100) / 100);
  }
  function pct(v) { return v === null || v === undefined ? '—' : Number(v).toFixed(1) + '%'; }
  function shortLabel(label) { return label.length === 10 ? label.slice(5) : label; }

  /** 环比：基期为 0 时，本期有数为「新增」，否则不可比。 */
  function deltaInfo(cur, prev) {
    cur = Number(cur || 0); prev = Number(prev || 0);
    if (prev <= 0) return cur > 0 ? { cls: 'is-up', text: i18n.new } : { cls: 'is-flat', text: '—' };
    var d = (cur - prev) / prev * 100;
    var cls = d > 0.05 ? 'is-up' : (d < -0.05 ? 'is-down' : 'is-flat');
    return { cls: cls, text: (d > 0.05 ? '↑' : (d < -0.05 ? '↓' : '')) + Math.abs(d).toFixed(1) + '%' };
  }

  /* ---------------- 日期 ---------------- */

  function parse(s) { var p = s.split('-'); return new Date(Date.UTC(+p[0], +p[1] - 1, +p[2])); }
  function fmt(d) { return d.toISOString().slice(0, 10); }
  function shift(s, days) { var d = parse(s); d.setUTCDate(d.getUTCDate() + days); return fmt(d); }
  function spanDays(a, b) { return Math.round((parse(b) - parse(a)) / 864e5) + 1; }

  function presetRange(key) {
    var today = boot.today;
    if (key === 'this_month') return [today.slice(0, 8) + '01', today];
    if (key === 'last_month') {
      var first = parse(today.slice(0, 8) + '01');
      var lastEnd = new Date(first.getTime() - 864e5);
      return [fmt(lastEnd).slice(0, 8) + '01', fmt(lastEnd)];
    }
    var n = parseInt(key.slice(1), 10);
    return [shift(today, -(n - 1)), today];
  }

  /* ---------------- 数据加载 ---------------- */

  function setBusy(busy) {
    root.classList.toggle('is-loading', busy);
    var body = root.querySelector('[data-aksrt-po-body]');
    if (body) body.setAttribute('aria-busy', busy ? 'true' : 'false');
  }

  function showError(msg) {
    var box = root.querySelector('[data-aksrt-po-error]');
    if (!box) return;
    box.hidden = !msg;
    box.querySelector('p').textContent = msg || '';
  }

  function load(from, to, group) {
    if (spanDays(from, to) < 1 || spanDays(from, to) > boot.maxDays || to > boot.today) {
      showError(i18n.badRange);
      return;
    }
    var seq = ++reqSeq;
    var url = boot.rest.url + (boot.rest.url.indexOf('?') === -1 ? '?' : '&')
      + 'from=' + encodeURIComponent(from) + '&to=' + encodeURIComponent(to) + '&group=' + encodeURIComponent(group);
    setBusy(true);
    fetch(url, { credentials: 'same-origin', headers: { 'X-WP-Nonce': boot.rest.nonce } })
      .then(function (res) { return res.json().then(function (json) { return { ok: res.ok, json: json }; }); })
      .then(function (r) {
        if (seq !== reqSeq) return;
        if (!r.ok || !r.json || !r.json.success) throw new Error((r.json && r.json.message) || i18n.loadError);
        state = { from: from, to: to, group: group, report: r.json.data };
        showError('');
        renderAll();
      })
      .catch(function (err) { if (seq === reqSeq) showError(err && err.message ? err.message : i18n.loadError); })
      .then(function () { if (seq === reqSeq) setBusy(false); });
  }

  /* ---------------- 指标卡 / 转化 / 排行 / 提示 ---------------- */

  function renderKpis(rep) {
    var t = rep.totals || {}, p = rep.previous || {};
    var defs = {
      paid_amount: [money, function () { return int(t.paid_count) + ' ' + i18n.unit; }],
      net_amount: [money, function () { return i18n.refund + ' ' + money(t.refund_amount); }],
      paid_count: [int, function () { return ''; }],
      buyers: [int, function () { return ''; }],
      avg_amount: [money, function () { return ''; }],
      refund_amount: [money, function () { return int(t.refund_count) + ' ' + i18n.unit; }],
    };
    root.querySelectorAll('[data-kpi]').forEach(function (card) {
      var key = card.getAttribute('data-kpi'), def = defs[key];
      if (!def) return;
      card.querySelector('[data-kpi-value]').textContent = def[0](t[key]);
      card.querySelector('[data-kpi-meta]').textContent = def[1]();
      var d = deltaInfo(t[key], p[key]);
      var el = card.querySelector('[data-kpi-delta]');
      // 退款上升是坏事：颜色反转。
      var cls = key === 'refund_amount' ? (d.cls === 'is-up' ? 'is-down' : (d.cls === 'is-down' ? 'is-up' : d.cls)) : d.cls;
      el.className = 'aksrt-po-delta ' + cls;
      el.textContent = i18n.basis + ' ' + d.text;
    });
    var label = root.querySelector('[data-aksrt-po-range-label]');
    if (label && rep.range) label.textContent = rep.range.from + ' ~ ' + rep.range.to + '（' + rep.range.days + ' 天）';
  }

  function renderFunnel(rep) {
    var t = rep.totals || {}, p = rep.previous || {};
    root.querySelectorAll('[data-aksrt-po-funnel] [data-metric]').forEach(function (li) {
      var key = li.getAttribute('data-metric');
      var isCount = key === 'created_count';
      li.querySelector('[data-value]').textContent = isCount ? int(t[key]) : pct(t[key]);
      var bar = li.querySelector('[data-bar]');
      bar.style.width = isCount ? '100%' : Math.max(0, Math.min(100, Number(t[key] || 0))) + '%';
      var deltaEl = li.querySelector('[data-delta]');
      if (isCount) {
        var d = deltaInfo(t[key], p[key]);
        deltaEl.className = 'aksrt-po-delta ' + d.cls;
        deltaEl.textContent = i18n.basis + ' ' + d.text;
      } else if (p[key] !== null && p[key] !== undefined && t[key] !== null && t[key] !== undefined) {
        var diff = Number(t[key]) - Number(p[key]);
        var good = key === 'conversion' ? diff >= 0 : diff <= 0;
        deltaEl.className = 'aksrt-po-delta ' + (Math.abs(diff) < 0.05 ? 'is-flat' : (good ? 'is-up' : 'is-down'));
        deltaEl.textContent = i18n.basis + ' ' + (diff > 0 ? '+' : '') + diff.toFixed(1) + 'pt';
      } else {
        deltaEl.className = 'aksrt-po-delta is-flat';
        deltaEl.textContent = '';
      }
    });
  }

  function renderTop(rep) {
    var body = root.querySelector('[data-aksrt-po-top]');
    if (!body) return;
    body.textContent = '';
    var rows = rep.top || [];
    if (!rows.length) {
      var tr = body.insertRow(), td = tr.insertCell();
      td.colSpan = 5;
      td.className = 'aksrt-po-top__empty';
      td.textContent = i18n.noTop;
      return;
    }
    var total = rows.reduce(function (s, r) { return s + Number(r.amount || 0); }, 0) || 1;
    rows.forEach(function (r, i) {
      var tr = body.insertRow();
      var rank = tr.insertCell();
      rank.className = 'column-rank';
      rank.innerHTML = '<span class="aksrt-po-rank' + (i < 3 ? ' is-top' : '') + '"></span>';
      rank.firstChild.textContent = String(i + 1);
      var title = tr.insertCell();
      if (r.url) {
        var a = document.createElement('a');
        a.href = r.url;
        a.textContent = r.title;
        title.appendChild(a);
      } else {
        title.textContent = r.title;
      }
      var count = tr.insertCell(); count.className = 'column-num'; count.textContent = int(r.count);
      var amount = tr.insertCell(); amount.className = 'column-num'; amount.textContent = money(r.amount);
      var share = tr.insertCell(); share.className = 'column-share';
      var ratio = Number(r.amount || 0) / total * 100;
      share.innerHTML = '<span class="aksrt-po-share"><i></i></span><span></span>';
      share.querySelector('i').style.width = ratio.toFixed(1) + '%';
      share.lastChild.textContent = ratio.toFixed(1) + '%';
    });
  }

  function renderExcluded(rep) {
    var box = root.querySelector('[data-aksrt-po-excluded]');
    if (!box) return;
    var list = rep.excluded || [];
    box.hidden = !list.length;
    box.textContent = list.length ? i18n.excluded + list.map(function (x) {
      return x.currency + ' ' + Number(x.amount).toFixed(2) + '（' + x.count + ' ' + i18n.unit + '）';
    }).join('；') : '';
  }

  /* ---------------- 图表 ---------------- */

  function chart(key) {
    var host = root.querySelector('[data-aksrt-po-chart="' + key + '"]');
    if (!host) return null;
    if (!charts[key]) charts[key] = echarts.init(host, null, { renderer: 'svg' });
    return charts[key];
  }

  function baseAxis(labels) {
    return {
      type: 'category',
      boundaryGap: false,
      data: labels,
      axisLine: { lineStyle: { color: '#e5e6eb' } },
      axisTick: { show: false },
      axisLabel: { color: MUTED, hideOverlap: true, formatter: shortLabel },
    };
  }
  function valueAxis(formatter, show) {
    return {
      type: 'value',
      show: show !== false,
      splitLine: { lineStyle: { color: LINE } },
      axisLabel: { color: MUTED, formatter: formatter },
      minInterval: 1,
    };
  }
  function tooltip(formatters) {
    return {
      trigger: 'axis',
      confine: true,
      axisPointer: { type: 'line', lineStyle: { color: '#c9cdd4', type: 'dashed' } },
      backgroundColor: '#fff',
      borderColor: '#e5e6eb',
      textStyle: { color: TEXT, fontSize: 12 },
      extraCssText: 'box-shadow:0 8px 24px rgba(15,23,42,.12);border-radius:8px;',
      valueFormatter: formatters,
    };
  }
  function area(color) {
    return {
      color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
        { offset: 0, color: color + '38' },
        { offset: 1, color: color + '00' },
      ]),
    };
  }
  function zoom(n) {
    return n > 45 ? [{ type: 'inside', start: 0, end: 100 }, { type: 'slider', height: 18, bottom: 6, borderColor: 'transparent', fillerColor: 'rgba(24,160,88,.12)', handleSize: '80%', showDetail: false }] : [];
  }
  function emptyGraphic(isEmpty) {
    return isEmpty ? [{ type: 'text', left: 'center', top: 'middle', silent: true, style: { text: i18n.empty, fill: MUTED, fontSize: 13 } }] : [];
  }

  function renderTrend(rep) {
    var c = chart('trend');
    if (!c) return;
    var s = rep.series || { labels: [], paid: [], net: [], refund: [], count: [] };
    var n = s.labels.length;
    var isEmpty = !s.paid.some(function (v) { return v > 0; });
    var smoothLine = function (name, data, color, extra) {
      return Object.assign({ name: name, type: 'line', data: data, smooth: 0.35, showSymbol: false, symbolSize: 6, color: color, lineStyle: { width: 2.25 }, emphasis: { focus: 'series' } }, extra || {});
    };
    c.setOption({
      aria: { enabled: true },
      color: [COLORS.paid, COLORS.net, COLORS.refund, COLORS.count],
      grid: { left: 8, right: 8, top: 40, bottom: n > 45 ? 36 : 8, containLabel: true },
      legend: { top: 0, left: 0, icon: 'roundRect', itemWidth: 12, itemHeight: 4, textStyle: { color: TEXT }, selected: { [i18n.refund]: true } },
      tooltip: tooltip(function (v) { return typeof v === 'number' && !Number.isInteger(v) ? money(v) : v; }),
      xAxis: baseAxis(s.labels),
      yAxis: [valueAxis(compact), valueAxis(function (v) { return v; })],
      dataZoom: zoom(n),
      graphic: emptyGraphic(isEmpty),
      series: [
        smoothLine(i18n.paid, s.paid, COLORS.paid, { areaStyle: area(COLORS.paid), tooltip: { valueFormatter: money } }),
        smoothLine(i18n.net, s.net, COLORS.net, { tooltip: { valueFormatter: money } }),
        smoothLine(i18n.refund, s.refund, COLORS.refund, { lineStyle: { width: 1.5, type: 'dashed' }, tooltip: { valueFormatter: money } }),
        {
          name: i18n.count, type: 'line', yAxisIndex: 1, data: s.count, smooth: false,
          showSymbol: n <= 31, symbol: 'circle', symbolSize: 5, color: COLORS.count,
          lineStyle: { width: 1.5 }, itemStyle: { borderColor: '#fff', borderWidth: 1.5 },
          tooltip: { valueFormatter: function (v) { return int(v) + ' ' + i18n.unit; } },
        },
      ],
    }, true);
  }

  function renderGroups(rep) {
    var c = chart('groups');
    if (!c) return;
    var s = rep.series || { labels: [], groups: [] };
    var groups = s.groups || [];
    var n = s.labels.length;
    c.setOption({
      aria: { enabled: true },
      color: PALETTE,
      grid: { left: 8, right: 8, top: 40, bottom: n > 45 ? 36 : 8, containLabel: true },
      legend: { top: 0, left: 0, icon: 'roundRect', itemWidth: 12, itemHeight: 4, textStyle: { color: TEXT } },
      tooltip: tooltip(money),
      xAxis: baseAxis(s.labels),
      yAxis: valueAxis(compact),
      dataZoom: zoom(n),
      graphic: emptyGraphic(!groups.length),
      series: groups.map(function (g) {
        return { name: g.name, type: 'line', data: g.data, smooth: 0.35, showSymbol: false, lineStyle: { width: 2 }, emphasis: { focus: 'series' } };
      }),
    }, true);
  }

  function renderMethods(rep) {
    var c = chart('methods');
    if (!c) return;
    var list = rep.methods || [];
    var total = list.reduce(function (s, m) { return s + Number(m.amount || 0); }, 0);
    c.setOption({
      aria: { enabled: true },
      color: PALETTE,
      tooltip: {
        trigger: 'item', confine: true, backgroundColor: '#fff', borderColor: '#e5e6eb', textStyle: { color: TEXT, fontSize: 12 },
        formatter: function (p) { return p.marker + p.name + '<br>' + money(p.value) + '（' + p.percent + '%，' + int(p.data.count) + ' ' + i18n.unit + '）'; },
      },
      legend: { bottom: 0, left: 'center', icon: 'circle', itemWidth: 8, itemHeight: 8, textStyle: { color: TEXT } },
      graphic: list.length ? [{
        type: 'group', left: 'center', top: '36%', silent: true,
        children: [
          { type: 'text', style: { text: i18n.total, fill: MUTED, fontSize: 12, align: 'center' }, left: 'center', top: 0 },
          { type: 'text', style: { text: money(total), fill: '#1f2329', fontSize: 16, fontWeight: 600, align: 'center' }, left: 'center', top: 18 },
        ],
      }] : emptyGraphic(true),
      series: [{
        type: 'pie', radius: ['52%', '72%'], center: ['50%', '44%'], avoidLabelOverlap: true,
        itemStyle: { borderColor: '#fff', borderWidth: 2, borderRadius: 4 },
        label: { show: false }, labelLine: { show: false },
        emphasis: { scale: true, scaleSize: 4 },
        data: list.map(function (m) { return { name: m.name, value: m.amount, count: m.count }; }),
      }],
    }, true);
  }

  function renderAll() {
    var rep = state.report || {};
    renderKpis(rep);
    renderFunnel(rep);
    renderTop(rep);
    renderExcluded(rep);
    renderTrend(rep);
    renderGroups(rep);
    renderMethods(rep);
  }

  /* ---------------- 交互 ---------------- */

  var presets = root.querySelector('[data-aksrt-po-presets]');
  var form = root.querySelector('[data-aksrt-po-range]');

  function syncForm() {
    if (!form) return;
    form.elements.from.value = state.from;
    form.elements.to.value = state.to;
    form.elements.group.value = state.group;
  }
  function pressPreset(btn) {
    if (!presets) return;
    presets.querySelectorAll('button').forEach(function (b) { b.setAttribute('aria-pressed', b === btn ? 'true' : 'false'); });
  }

  if (presets) {
    presets.addEventListener('click', function (e) {
      var btn = e.target.closest('button[data-preset]');
      if (!btn) return;
      var r = presetRange(btn.getAttribute('data-preset'));
      pressPreset(btn);
      state.from = r[0]; state.to = r[1];
      syncForm();
      load(r[0], r[1], form ? form.elements.group.value : state.group);
    });
  }
  if (form) {
    form.addEventListener('submit', function (e) {
      e.preventDefault();
      var from = form.elements.from.value, to = form.elements.to.value;
      if (!from || !to || from > to) { showError(i18n.badRange); return; }
      pressPreset(null);
      load(from, to, form.elements.group.value);
    });
    form.elements.group.addEventListener('change', function () { load(state.from, state.to, form.elements.group.value); });
  }

  var resizeTimer;
  window.addEventListener('resize', function () {
    clearTimeout(resizeTimer);
    resizeTimer = setTimeout(function () { Object.keys(charts).forEach(function (k) { charts[k].resize(); }); }, 120);
  });

  syncForm();
  renderAll();
})();