/* Unified admin panel client behaviour.
 * Lives in an external file because the site's enforced CSP (nginx) uses
 * script-src 'self' with no 'unsafe-inline' — inline <script> would be blocked.
 */
(function () {
  // ---- Blog: markdown toolbar + live preview ----
  var ed = document.getElementById('md-editor');
  var pv = document.getElementById('md-preview');
  if (ed) {
    var esc = function (s) {
      return s.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
    };
    var render = function (t) {
      return esc(t)
        .replace(/```([\s\S]*?)```/g, function (_, c) { return '<pre><code>' + c + '</code></pre>'; })
        .replace(/^### (.*)$/gm, '<h3>$1</h3>')
        .replace(/^## (.*)$/gm, '<h2>$1</h2>')
        .replace(/^# (.*)$/gm, '<h1>$1</h1>')
        .replace(/^&gt; (.*)$/gm, '<blockquote>$1</blockquote>')
        .replace(/\*\*([^*]+)\*\*/g, '<b>$1</b>')
        .replace(/\*([^*]+)\*/g, '<i>$1</i>')
        .replace(/`([^`]+)`/g, '<code>$1</code>')
        .replace(/!\[([^\]]*)\]\(([^)]+)\)/g, '<img alt="$1" src="$2" style="max-width:100%">')
        .replace(/\[([^\]]+)\]\(([^)]+)\)/g, '<a href="$2" target="_blank" rel="noopener">$1</a>')
        .replace(/\n/g, '<br>');
    };
    var upd = function () {
      if (pv) pv.innerHTML = ed.value.trim() ? render(ed.value) : '<em class="muted">Type to preview…</em>';
    };
    ed.addEventListener('input', upd);
    upd();

    document.querySelectorAll('.md-toolbar button[data-md]').forEach(function (btn) {
      btn.addEventListener('click', function () {
        var mode = btn.dataset.md, a = btn.dataset.a || '', b = btn.dataset.b || '';
        var s = ed.selectionStart, e = ed.selectionEnd, v = ed.value;
        if (mode === 'wrap') {
          ed.setRangeText(a + v.substring(s, e) + b, s, e, 'end');
        } else if (mode === 'line') {
          var ls = s; while (ls > 0 && v[ls - 1] !== '\n') ls--;
          ed.setRangeText(a, ls, ls, 'end');
        } else {
          ed.setRangeText(a, s, e, 'end');
        }
        ed.dispatchEvent(new Event('input'));
        ed.focus();
      });
    });
  }

  // ---- MOTD: live XMPP preview (emoji / heading / body / url) ----
  var motdPreview = document.getElementById('motd-live-preview');
  if (motdPreview) {
    var motdVal = function (id) {
      var el = document.getElementById(id);
      return el ? String(el.value || '').trim() : '';
    };
    var motdPaint = function () {
      var emoji = motdVal('motd-emoji');
      var heading = motdVal('motd-heading');
      var body = motdVal('motd-body');
      var url = motdVal('motd-url');
      var head = [emoji, heading].filter(Boolean).join(' ');
      var lines = [];
      if (head) lines.push(head);
      if (body) lines.push(body);
      if (url) lines.push(url);
      motdPreview.textContent = lines.join('\n') || '// fill in a body';
    };
    ['motd-emoji', 'motd-heading', 'motd-body', 'motd-url'].forEach(function (id) {
      var el = document.getElementById(id);
      if (el) el.addEventListener('input', motdPaint);
    });
    motdPaint();
  }

  // ---- Vibe: live "detected type" badge ----
  var url = document.getElementById('v-url');
  var badge = document.getElementById('v-type');
  if (url && badge) {
    var detect = function (u) {
      if (!u) return 'none';
      if (/\.(jpe?g|png|gif|webp|bmp|svg|avif)(\?|$)/i.test(u)) return 'image';
      if (/\.(mp4|webm|ogv|mov)(\?|$)/i.test(u)) return 'video';
      if (/\.(mp3|flac|wav|ogg|aac|opus|m4a)(\?|$)/i.test(u)) return 'audio';
      if (/(youtube\.com\/watch\?.*v=|youtu\.be\/|youtube\.com\/shorts\/)[\w-]{11}/.test(u)) return 'youtube';
      if (/vimeo\.com\/(video\/)?\d+/.test(u)) return 'vimeo';
      if (/(dailymotion\.com\/video|dai\.ly)\/[\w]+/i.test(u)) return 'dailymotion';
      if (/bilibili\.com\/video\/(BV[\w]+|av\d+)/i.test(u)) return 'bilibili';
      if (/(nicovideo\.jp\/watch|nico\.ms)\/(sm|nm|so)?\d+/i.test(u)) return 'niconico';
      return 'link';
    };
    url.addEventListener('input', function () { badge.textContent = detect(url.value.trim()); });
  }

  // ---- Traffic analytics charts + live numbers (vanilla canvas, no CDN) ----
  (function initTrafficLive() {
    var liveRoot = document.getElementById('traffic-live-root');
    var chartRoot = document.getElementById('traffic-analytics');
    var dataEl = document.getElementById('traffic-analytics-data');
    // Need at least KPI root or charts to run live updates
    if (!liveRoot && !chartRoot) return;

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

    var light = document.body.classList.contains('light-mode');
    var colors = {
      bg: light ? '#f4f7fa' : '#050000',
      grid: light ? 'rgba(0,0,0,0.08)' : 'rgba(255,255,255,0.08)',
      axis: light ? 'rgba(0,0,0,0.45)' : 'rgba(200,200,210,0.55)',
      hits: light ? '#1a7a12' : '#39ff14',
      hitsFill: light ? 'rgba(26,122,18,0.15)' : 'rgba(57,255,20,0.12)',
      uniq: light ? '#1a4f9c' : '#5b9dff',
      uniqFill: light ? 'rgba(26,79,156,0.12)' : 'rgba(91,157,255,0.12)',
      bar: light ? '#1a7a12' : '#39ff14',
      barAlt: light ? '#1a4f9c' : '#5b9dff',
      bot: light ? '#a65c00' : '#ff9f1a',
      botFill: light ? 'rgba(166,92,0,0.12)' : 'rgba(255,159,26,0.14)',
      botAlt: light ? '#8a3d00' : '#ff6b35',
      text: light ? 'rgba(20,20,30,0.75)' : 'rgba(200,200,210,0.8)',
      muted: light ? 'rgba(20,20,30,0.45)' : 'rgba(160,160,170,0.7)',
    };

    function setupCanvas(canvas) {
      if (!canvas) return null;
      var dpr = Math.max(1, Math.min(2, window.devicePixelRatio || 1));
      var rect = canvas.getBoundingClientRect();
      var cssW = Math.max(280, Math.floor(rect.width || canvas.width || 600));
      var cssH = Math.max(160, Math.floor(canvas.height * (cssW / (canvas.width || cssW))));
      // Prefer intrinsic aspect from attributes
      var attrW = parseInt(canvas.getAttribute('width'), 10) || 600;
      var attrH = parseInt(canvas.getAttribute('height'), 10) || 240;
      cssH = Math.round(cssW * (attrH / attrW));
      canvas.style.width = cssW + 'px';
      canvas.style.height = cssH + 'px';
      canvas.width = Math.floor(cssW * dpr);
      canvas.height = Math.floor(cssH * dpr);
      var ctx = canvas.getContext('2d');
      ctx.setTransform(dpr, 0, 0, dpr, 0, 0);
      return { ctx: ctx, w: cssW, h: cssH };
    }

    function maxOf(arr) {
      var m = 0;
      for (var i = 0; i < arr.length; i++) if (arr[i] > m) m = arr[i];
      return m || 1;
    }

    function niceMax(n) {
      if (n <= 1) return 1;
      var p = Math.pow(10, Math.floor(Math.log10(n)));
      var m = n / p;
      var nice = m <= 1 ? 1 : m <= 2 ? 2 : m <= 5 ? 5 : 10;
      return nice * p;
    }

    function drawEmpty(ctx, w, h, msg) {
      ctx.fillStyle = colors.bg;
      ctx.fillRect(0, 0, w, h);
      ctx.fillStyle = colors.muted;
      ctx.font = '12px ui-monospace, Menlo, Consolas, monospace';
      ctx.textAlign = 'center';
      ctx.fillText(msg || 'No data yet', w / 2, h / 2);
    }

    /** Multi-series line chart */
    function drawLineChart(canvas, series, labels, opts) {
      var s = setupCanvas(canvas);
      if (!s) return;
      var ctx = s.ctx, w = s.w, h = s.h;
      var pad = { t: 16, r: 12, b: 36, l: 40 };
      var plotW = w - pad.l - pad.r;
      var plotH = h - pad.t - pad.b;
      ctx.fillStyle = colors.bg;
      ctx.fillRect(0, 0, w, h);

      var all = [];
      series.forEach(function (ser) {
        ser.values.forEach(function (v) { all.push(v); });
      });
      if (!labels.length || maxOf(all) === 0) {
        drawEmpty(ctx, w, h, 'No hits in this range yet');
        return;
      }
      var yMax = niceMax(maxOf(all));
      var n = labels.length;
      var xAt = function (i) {
        return pad.l + (n === 1 ? plotW / 2 : (i / (n - 1)) * plotW);
      };
      var yAt = function (v) {
        return pad.t + plotH - (v / yMax) * plotH;
      };

      // grid
      ctx.strokeStyle = colors.grid;
      ctx.lineWidth = 1;
      ctx.fillStyle = colors.axis;
      ctx.font = '10px ui-monospace, Menlo, Consolas, monospace';
      ctx.textAlign = 'right';
      ctx.textBaseline = 'middle';
      var ticks = 4;
      for (var t = 0; t <= ticks; t++) {
        var val = Math.round((yMax * t) / ticks);
        var y = yAt(val);
        ctx.beginPath();
        ctx.moveTo(pad.l, y);
        ctx.lineTo(pad.l + plotW, y);
        ctx.stroke();
        ctx.fillText(String(val), pad.l - 6, y);
      }

      // x labels (sparse)
      ctx.textAlign = 'center';
      ctx.textBaseline = 'top';
      ctx.fillStyle = colors.axis;
      var step = Math.max(1, Math.ceil(n / 8));
      for (var i = 0; i < n; i += step) {
        var lab = labels[i];
        if (opts && opts.labelFmt) lab = opts.labelFmt(lab);
        ctx.fillText(lab, xAt(i), pad.t + plotH + 8);
      }

      series.forEach(function (ser) {
        // fill
        if (ser.fill) {
          ctx.beginPath();
          ctx.moveTo(xAt(0), yAt(0));
          for (var j = 0; j < ser.values.length; j++) {
            ctx.lineTo(xAt(j), yAt(ser.values[j]));
          }
          ctx.lineTo(xAt(ser.values.length - 1), yAt(0));
          ctx.closePath();
          ctx.fillStyle = ser.fill;
          ctx.fill();
        }
        // line
        ctx.beginPath();
        for (var k = 0; k < ser.values.length; k++) {
          var x = xAt(k), y = yAt(ser.values[k]);
          if (k === 0) ctx.moveTo(x, y);
          else ctx.lineTo(x, y);
        }
        ctx.strokeStyle = ser.color;
        ctx.lineWidth = 2;
        ctx.lineJoin = 'round';
        ctx.stroke();
        // dots on last points / sparse
        ctx.fillStyle = ser.color;
        for (var d = 0; d < ser.values.length; d++) {
          if (ser.values[d] <= 0 && d !== ser.values.length - 1) continue;
          if (d % Math.max(1, Math.floor(n / 12)) !== 0 && d !== n - 1) continue;
          ctx.beginPath();
          ctx.arc(xAt(d), yAt(ser.values[d]), 2.5, 0, Math.PI * 2);
          ctx.fill();
        }
      });
    }

    /**
     * Vertical bar chart.
     * values: number[] (single series) OR { human: number[], bots: number[] }
     * Bots draw in orange beside human bars.
     */
    function drawBarChart(canvas, values, labels, opts) {
      var s = setupCanvas(canvas);
      if (!s) return;
      var ctx = s.ctx, w = s.w, h = s.h;
      var pad = { t: 16, r: 12, b: 36, l: 40 };
      var plotW = w - pad.l - pad.r;
      var plotH = h - pad.t - pad.b;
      ctx.fillStyle = colors.bg;
      ctx.fillRect(0, 0, w, h);

      var human = Array.isArray(values) ? values : (values.human || []);
      var bots = Array.isArray(values) ? null : (values.bots || null);
      var dual = !!(bots && bots.length === human.length);
      var all = human.slice();
      if (dual) bots.forEach(function (v) { all.push(v); });

      if (!human.length || maxOf(all) === 0) {
        drawEmpty(ctx, w, h, 'No hits in this range yet');
        return;
      }
      var yMax = niceMax(maxOf(all));
      var n = human.length;
      var gap = 2;
      var groupW = plotW / n;
      var barW = dual
        ? Math.max(2, (groupW - gap) / 2 - 1)
        : Math.max(2, groupW - gap);

      ctx.strokeStyle = colors.grid;
      ctx.fillStyle = colors.axis;
      ctx.font = '10px ui-monospace, Menlo, Consolas, monospace';
      ctx.textAlign = 'right';
      ctx.textBaseline = 'middle';
      for (var t = 0; t <= 4; t++) {
        var val = Math.round((yMax * t) / 4);
        var y = pad.t + plotH - (val / yMax) * plotH;
        ctx.beginPath();
        ctx.moveTo(pad.l, y);
        ctx.lineTo(pad.l + plotW, y);
        ctx.stroke();
        ctx.fillText(String(val), pad.l - 6, y);
      }

      for (var i = 0; i < n; i++) {
        var gx = pad.l + i * groupW + gap / 2;
        // Human (green)
        var bh = (human[i] / yMax) * plotH;
        var hy = pad.t + plotH - bh;
        ctx.fillStyle = colors.bar;
        ctx.globalAlpha = human[i] > 0 ? 0.9 : 0.15;
        ctx.fillRect(gx, hy, barW, Math.max(bh, human[i] > 0 ? 1 : 0));
        // Bots (orange) — separate colour, not mixed into human bars
        if (dual) {
          var bb = (bots[i] / yMax) * plotH;
          var by = pad.t + plotH - bb;
          ctx.fillStyle = colors.bot;
          ctx.globalAlpha = bots[i] > 0 ? 0.9 : 0.15;
          ctx.fillRect(gx + barW + 1, by, barW, Math.max(bb, bots[i] > 0 ? 1 : 0));
        }
        ctx.globalAlpha = 1;
      }

      ctx.fillStyle = colors.axis;
      ctx.textAlign = 'center';
      ctx.textBaseline = 'top';
      var step = Math.max(1, Math.ceil(n / 8));
      for (var j = 0; j < n; j += step) {
        var lab = labels[j] || '';
        if (opts && opts.labelFmt) lab = opts.labelFmt(lab);
        var lx = pad.l + j * groupW + groupW / 2;
        ctx.fillText(lab, lx, pad.t + plotH + 8);
      }
    }

    /** Horizontal bar chart. opts.palette: 'bot' uses orange bot colors. */
    function drawHBarChart(canvas, items, opts) {
      var s = setupCanvas(canvas);
      if (!s) return;
      var ctx = s.ctx, w = s.w, h = s.h;
      ctx.fillStyle = colors.bg;
      ctx.fillRect(0, 0, w, h);
      if (!items || !items.length) {
        drawEmpty(ctx, w, h, 'No data yet');
        return;
      }
      var pad = { t: 8, r: 48, b: 8, l: 8 };
      var rowH = Math.min(28, (h - pad.t - pad.b) / items.length);
      var maxLabel = 0;
      ctx.font = '11px ui-monospace, Menlo, Consolas, monospace';
      items.forEach(function (it) {
        var lab = truncate(it.label, 36);
        maxLabel = Math.max(maxLabel, ctx.measureText(lab).width);
      });
      var labelW = Math.min(Math.max(80, maxLabel + 8), w * 0.45);
      var barLeft = pad.l + labelW + 8;
      var barMaxW = w - barLeft - pad.r;
      var maxC = maxOf(items.map(function (it) { return it.count; }));
      maxC = niceMax(maxC);
      var cA = (opts && opts.palette === 'bot') ? colors.bot : colors.bar;
      var cB = (opts && opts.palette === 'bot') ? colors.botAlt : colors.barAlt;

      items.forEach(function (it, i) {
        var y = pad.t + i * rowH + rowH * 0.15;
        var bh = rowH * 0.7;
        var lab = truncate(it.label, 36);
        ctx.fillStyle = colors.text;
        ctx.textAlign = 'right';
        ctx.textBaseline = 'middle';
        ctx.font = '11px ui-monospace, Menlo, Consolas, monospace';
        ctx.fillText(lab, pad.l + labelW, y + bh / 2);

        var bw = maxC ? (it.count / maxC) * barMaxW : 0;
        ctx.fillStyle = i % 2 === 0 ? cA : cB;
        ctx.globalAlpha = 0.85;
        ctx.fillRect(barLeft, y, Math.max(bw, it.count > 0 ? 2 : 0), bh);
        ctx.globalAlpha = 1;

        ctx.fillStyle = colors.muted;
        ctx.textAlign = 'left';
        ctx.fillText(String(it.count), barLeft + bw + 6, y + bh / 2);
      });
    }

    function truncate(s, n) {
      s = String(s || '');
      if (s.length <= n) return s;
      return s.slice(0, n - 1) + '…';
    }

    function esc(s) {
      return String(s == null ? '' : s)
        .replace(/&/g, '&amp;')
        .replace(/</g, '&lt;')
        .replace(/>/g, '&gt;')
        .replace(/"/g, '&quot;');
    }

    function pad2(n) {
      n = String(n);
      return n.length < 2 ? '0' + n : n;
    }

    function fmtUtc(ts, withSec) {
      if (!ts) return '—';
      var d = new Date(ts * 1000);
      var s =
        d.getUTCFullYear() +
        '-' + pad2(d.getUTCMonth() + 1) +
        '-' + pad2(d.getUTCDate()) +
        ' ' + pad2(d.getUTCHours()) +
        ':' + pad2(d.getUTCMinutes());
      if (withSec) s += ':' + pad2(d.getUTCSeconds());
      return s + ' UTC';
    }

    function drawAllCharts(analytics) {
      analytics = analytics || {};
      var daily = analytics.daily || [];
      var dailySeries = [
        { values: daily.map(function (d) { return d.hits; }), color: colors.hits, fill: colors.hitsFill },
        { values: daily.map(function (d) { return d.unique; }), color: colors.uniq, fill: colors.uniqFill },
        { values: daily.map(function (d) { return d.bots || 0; }), color: colors.bot, fill: colors.botFill },
      ];
      drawLineChart(
        document.getElementById('chart-daily'),
        dailySeries,
        daily.map(function (d) { return d.day; }),
        { labelFmt: function (d) { return d.slice(5); } }
      );

      var hourly = analytics.hourly || [];
      drawBarChart(
        document.getElementById('chart-hourly'),
        {
          human: hourly.map(function (d) { return d.hits; }),
          bots: hourly.map(function (d) { return d.bots || 0; }),
        },
        hourly.map(function (d) { return d.hour; }),
        { labelFmt: function (h) { return h.slice(11, 13) + 'h'; } }
      );

      drawHBarChart(document.getElementById('chart-pages'), analytics.top_pages || []);
      drawHBarChart(document.getElementById('chart-visitors'), analytics.visitors || []);
      drawHBarChart(document.getElementById('chart-bots'), analytics.bots || [], { palette: 'bot' });
      drawHBarChart(document.getElementById('chart-hosts'), analytics.hosts || []);
      drawHBarChart(document.getElementById('chart-langs'), analytics.langs || []);
      drawHBarChart(document.getElementById('chart-refs'), analytics.refs || []);
    }

    // Animated count-up for KPI big numbers
    var kpiRaf = {};
    function animateKpi(el, from, to) {
      var key = el.getAttribute('data-kpi') || el.id || 'x';
      if (kpiRaf[key]) cancelAnimationFrame(kpiRaf[key]);
      from = Math.round(Number(from) || 0);
      to = Math.round(Number(to) || 0);
      if (from === to) {
        el.textContent = String(to);
        el.setAttribute('data-value', String(to));
        return;
      }
      var start = performance.now();
      var dur = Math.min(700, 180 + Math.abs(to - from) * 12);
      function frame(now) {
        var t = Math.min(1, (now - start) / dur);
        // ease-out cubic
        var e = 1 - Math.pow(1 - t, 3);
        var v = Math.round(from + (to - from) * e);
        el.textContent = String(v);
        if (t < 1) {
          kpiRaf[key] = requestAnimationFrame(frame);
        } else {
          el.textContent = String(to);
          el.setAttribute('data-value', String(to));
          delete kpiRaf[key];
        }
      }
      kpiRaf[key] = requestAnimationFrame(frame);
    }

    function updateKpis(summary, opts) {
      if (!summary) return;
      var animate = !opts || opts.animate !== false;
      var keys = [
        'total_hits', 'unique_sessions', 'today', 'week',
        'bot_hits', 'bot_today', 'bot_week', 'total_pages',
      ];
      keys.forEach(function (k) {
        if (summary[k] == null) return;
        var el = document.querySelector('[data-kpi="' + k + '"]');
        if (!el) return;
        var next = Math.round(Number(summary[k]) || 0);
        var prev = parseInt(el.getAttribute('data-value') || el.textContent || '0', 10) || 0;
        if (prev === next && el.textContent === String(next)) return;
        el.classList.remove('traffic-kpi-flash');
        void el.offsetWidth;
        el.classList.add('traffic-kpi-flash');
        if (animate && Math.abs(next - prev) < 5000) {
          animateKpi(el, prev, next);
        } else {
          el.textContent = String(next);
          el.setAttribute('data-value', String(next));
        }
      });
    }

    function updateTopTable(rows) {
      var body = document.getElementById('traffic-top-body');
      var table = document.getElementById('traffic-top-table');
      var empty = document.getElementById('traffic-top-empty');
      if (!body || !table) return;
      rows = rows || [];
      if (!rows.length) {
        body.innerHTML = '';
        table.hidden = true;
        if (empty) empty.hidden = false;
        return;
      }
      if (empty) empty.hidden = true;
      table.hidden = false;
      var html = '';
      for (var i = 0; i < rows.length; i++) {
        var p = rows[i];
        html +=
          '<tr>' +
          '<td><code>' + esc((p.host || '') + (p.path || '')) + '</code></td>' +
          '<td>' + (p.hits | 0) + '</td>' +
          '<td>' + (p.unique_sessions | 0) + '</td>' +
          '<td>' + (p.bot_hits | 0) + '</td>' +
          '<td>' + (p.last_local_count | 0) + '</td>' +
          '<td>' + esc(p.last_visitor || '—') + '</td>' +
          '<td>' + esc(p.last_hit ? fmtUtc(p.last_hit, false) : '—') + '</td>' +
          '</tr>';
      }
      body.innerHTML = html;
    }

    function updateRecentTable(rows) {
      var body = document.getElementById('traffic-recent-body');
      var table = document.getElementById('traffic-recent-table');
      var empty = document.getElementById('traffic-recent-empty');
      if (!body || !table) return;
      rows = rows || [];
      if (!rows.length) {
        body.innerHTML = '';
        table.hidden = true;
        if (empty) empty.hidden = false;
        return;
      }
      if (empty) empty.hidden = true;
      table.hidden = false;
      var html = '';
      for (var i = 0; i < rows.length; i++) {
        var r = rows[i];
        var isBot = !!(r.is_bot | 0);
        html +=
          '<tr class="' + (isBot ? 'traffic-row--bot' : '') + '">' +
          '<td>' + esc(fmtUtc(r.ts, true)) + '</td>' +
          '<td>' + esc(r.visitor || 'Unknown visitor') + '</td>' +
          '<td>' +
          (isBot
            ? '<span class="type-badge traffic-badge--bot">bot</span>'
            : '<span class="type-badge">human</span>') +
          '</td>' +
          '<td><code>' + esc((r.host || '') + (r.path || '')) + '</code></td>' +
          '<td>' + (r.local_count | 0) + '</td>' +
          '<td>' + esc(r.lang || '—') + '</td>' +
          '<td>' + esc(r.ref_host || '—') + '</td>' +
          '<td>' + (!isBot && (r.is_new | 0) ? 'yes' : '') + '</td>' +
          '</tr>';
      }
      body.innerHTML = html;
    }

    function setLiveStatus(kind, msg) {
      var bar = document.getElementById('traffic-live-bar');
      var status = document.getElementById('traffic-live-status');
      var ago = document.getElementById('traffic-live-ago');
      if (bar) {
        bar.classList.toggle('traffic-live-bar--err', kind === 'err');
        bar.classList.toggle('traffic-live-bar--ok', kind === 'ok');
      }
      if (status) status.textContent = kind === 'err' ? 'Offline' : 'Live';
      if (ago) ago.textContent = msg ? '· ' + msg : '';
    }

    // Initial paint from server-rendered payload
    if (chartRoot && dataEl) {
      drawAllCharts(data);
      chartRoot.setAttribute('data-ready', '1');
    }

    // Redraw on resize (debounced)
    var resizeT = null;
    var lastAnalytics = data;
    window.addEventListener('resize', function () {
      clearTimeout(resizeT);
      resizeT = setTimeout(function () {
        if (chartRoot) drawAllCharts(lastAnalytics);
      }, 150);
    });

    // ---- Live polling: numbers + charts + tables ----
    var pollHost = liveRoot || chartRoot;
    var pollUrl = (pollHost && pollHost.getAttribute('data-poll')) || '/api/traffic-stats.php';
    var pollMs = parseInt((pollHost && pollHost.getAttribute('data-poll-ms')) || '2000', 10) || 2000;
    pollMs = Math.max(1500, Math.min(30000, pollMs));
    var lastRev = '';
    var lastOkAt = 0;
    var pollTimer = null;
    var inFlight = false;
    var aborted = false;

    function agoLabel(ts) {
      if (!ts) return 'waiting…';
      var sec = Math.max(0, Math.floor((Date.now() - ts) / 1000));
      if (sec < 2) return 'just now';
      if (sec < 60) return sec + 's ago';
      return Math.floor(sec / 60) + 'm ago';
    }

    function tickAgo() {
      if (lastOkAt) setLiveStatus('ok', 'updated ' + agoLabel(lastOkAt));
    }

    function applyPayload(payload, force) {
      if (!payload || !payload.ok) return;
      lastOkAt = Date.now();
      setLiveStatus('ok', 'updated ' + agoLabel(lastOkAt));

      var changed = force || !payload.rev || payload.rev !== lastRev;
      if (payload.rev) lastRev = payload.rev;
      if (!changed) return;

      // Numbers first so KPIs feel instant
      if (payload.summary) updateKpis(payload.summary, { animate: true });
      if (payload.analytics) {
        lastAnalytics = payload.analytics;
        if (dataEl) dataEl.textContent = JSON.stringify(payload.analytics);
        if (chartRoot) drawAllCharts(payload.analytics);
      }
      if (payload.top) updateTopTable(payload.top);
      if (payload.recent) updateRecentTable(payload.recent);
    }

    function pollOnce() {
      if (aborted || inFlight || document.hidden) return;
      inFlight = true;
      var ctrl = typeof AbortController !== 'undefined' ? new AbortController() : null;
      var to = setTimeout(function () {
        if (ctrl) ctrl.abort();
      }, 12000);
      fetch(pollUrl + (pollUrl.indexOf('?') >= 0 ? '&' : '?') + '_=' + Date.now(), {
        method: 'GET',
        credentials: 'same-origin',
        cache: 'no-store',
        headers: { Accept: 'application/json' },
        signal: ctrl ? ctrl.signal : undefined,
      })
        .then(function (res) {
          if (res.status === 401) {
            setLiveStatus('err', 'session expired — reload');
            aborted = true;
            return null;
          }
          if (!res.ok) throw new Error('HTTP ' + res.status);
          return res.json();
        })
        .then(function (json) {
          if (!json) return;
          if (!json.ok) throw new Error(json.err || 'bad response');
          applyPayload(json, false);
        })
        .catch(function () {
          if (!aborted) setLiveStatus('err', 'retrying…');
        })
        .finally(function () {
          clearTimeout(to);
          inFlight = false;
        });
    }

    function schedulePoll() {
      clearTimeout(pollTimer);
      if (aborted) return;
      pollTimer = setTimeout(function () {
        pollOnce();
        schedulePoll();
      }, pollMs);
    }

    // Immediate first poll so numbers move as soon as hits land
    setTimeout(pollOnce, 400);
    schedulePoll();
    setInterval(tickAgo, 1000);

    document.addEventListener('visibilitychange', function () {
      if (!document.hidden && !aborted) {
        pollOnce();
      }
    });
  })();

})();