{% extends "base.html" %}
{% block content %}
<section>
  <h2>Diagnostics</h2>
  <p class="muted">Use these tools to verify error handling surfaces.</p>
  <div class="card" style="background: var(--panel); border:1px solid var(--border); border-radius:10px; padding:.75rem; margin-bottom:.75rem">
    <h3 style="margin-top:0">System summary</h3>
    <div id="sysSummary" class="muted">Loading…</div>
    <div id="envFlags" style="margin-top:.5rem"></div>
  <div id="themeSuppMetrics" class="muted" style="margin-top:.5rem">Loading theme metrics…</div>
    <div id="themeSummary" style="margin-top:.5rem"></div>
    <div id="themeTokenStats" class="muted" style="margin-top:.5rem">Loading theme stats…</div>
    <div style="margin-top:.35rem">
      <button class="btn" id="diag-theme-reset">Reset theme preference</button>
    </div>
  </div>
  <div class="card" style="background: var(--panel); border:1px solid var(--border); border-radius:10px; padding:.75rem; margin-bottom:.75rem">
    <h3 style="margin-top:0">Multi-face merge snapshot</h3>
    <div class="muted" style="margin-bottom:.35rem">Pulls from <code>logs/dfc_merge_summary.json</code> to verify merge coverage.</div>
  {% set colors = (merge_summary.colors if merge_summary else {}) | default({}) %}
    {% if colors %}
    <div class="muted" style="margin-bottom:.35rem">Last updated: {{ merge_summary.updated_at or 'unknown' }}</div>
    <div style="overflow-x:auto">
      <table style="width:100%; border-collapse:collapse; font-size:13px;">
        <thead>
          <tr style="border-bottom:1px solid var(--border); text-align:left;">
            <th style="padding:.35rem .25rem;">Color</th>
            <th style="padding:.35rem .25rem;">Groups merged</th>
            <th style="padding:.35rem .25rem;">Faces dropped</th>
            <th style="padding:.35rem .25rem;">Multi-face rows</th>
            <th style="padding:.35rem .25rem;">Latest entries</th>
          </tr>
        </thead>
        <tbody>
        {% for item in colors|dictsort %}
          {% set color = item[0] %}
          {% set payload = item[1] | default({}) %}
          <tr style="border-bottom:1px solid rgba(148,163,184,0.2);">
            <td style="padding:.35rem .25rem; font-weight:600;">{{ color|title }}</td>
            <td style="padding:.35rem .25rem;">{{ payload.group_count or 0 }}</td>
            <td style="padding:.35rem .25rem;">{{ payload.faces_dropped or 0 }}</td>
            <td style="padding:.35rem .25rem;">{{ payload.multi_face_rows or 0 }}</td>
            <td style="padding:.35rem .25rem;">
              {% set entries = (payload.entries | default([])) %}
              {% if entries %}
              <details>
                <summary style="cursor:pointer;">{{ entries|length }} recorded</summary>
                {% set preview = entries[:5] %}
                <ul style="margin:.35rem 0 0 .75rem; padding:0; list-style:disc; max-height:180px; overflow:auto;">
                  {% for entry in preview %}
                  <li style="margin-bottom:.25rem;">
                    <strong>{{ entry.name }}</strong> — {{ entry.total_faces }} faces (dropped {{ entry.dropped_faces }})
                  </li>
                  {% endfor %}
                  {% if entries|length > preview|length %}
                  <li style="font-size:11px; opacity:.75;">… {{ entries|length - preview|length }} more entries</li>
                  {% endif %}
                </ul>
              </details>
              {% else %}
              <span class="muted">No groups recorded</span>
              {% endif %}
            </td>
          </tr>
        {% endfor %}
        </tbody>
      </table>
    </div>
    {% else %}
    <div class="muted">No merge summary has been recorded. Run the tagger with multi-face merging enabled.</div>
    {% endif %}
    <div id="dfcMetrics" class="muted" style="margin-top:.5rem;">Loading MDFC metrics…</div>
  </div>
  <div class="card" style="background: var(--panel); border:1px solid var(--border); border-radius:10px; padding:.75rem; margin-bottom:.75rem">
    <h3 style="margin-top:0">Performance (local)</h3>
    <div class="muted" style="margin-bottom:.35rem">Scroll the Step 5 list; this panel shows a rough FPS estimate and virtualization renders.</div>
    <div style="display:flex; gap:1rem; flex-wrap:wrap">
      <div><strong>Scroll FPS:</strong> <span id="perf-fps">–</span></div>
      <div><strong>Visible tiles:</strong> <span id="perf-visible">–</span></div>
      <div><strong>Render count:</strong> <span id="perf-renders">0</span></div>
    </div>
  </div>
  <div class="card" style="background: var(--panel); border:1px solid var(--border); border-radius:10px; padding:.75rem; margin-bottom:.75rem">
    <h3 style="margin-top:0">Combos & Synergies (ad-hoc)</h3>
    <div class="muted" style="margin-bottom:.35rem">Paste card names (one per line) and detect two-card combos and synergies using current lists.</div>
    <textarea id="diag-combos-input" rows="6" style="width:100%; resize:vertical; font-family: var(--mono);"></textarea>
    <div style="margin-top:.5rem; display:flex; gap:.5rem; align-items:center">
      <button class="btn" id="diag-combos-run">Detect</button>
      <small class="muted">Runs in diagnostics mode only.</small>
    </div>
    <pre id="diag-combos-out" style="margin-top:.5rem; white-space:pre-wrap"></pre>
  </div>
  {% if enable_pwa %}
  <div class="card" style="background:#0f1115; border:1px solid var(--border); border-radius:10px; padding:.75rem; margin-bottom:.75rem">
    <h3 style="margin-top:0">PWA status</h3>
    <div id="pwaStatus" class="muted">Checking…</div>
  </div>
  {% endif %}
  <div class="card" style="background: var(--panel); border:1px solid var(--border); border-radius:10px; padding:.75rem;">
  <h3 style="margin-top:0">Error triggers</h3>
    <div class="row" style="display:flex; gap:.5rem; align-items:center">
  <button class="btn" hx-get="/diagnostics/trigger-error" hx-trigger="click" hx-target="this" hx-swap="none">Trigger HTTP error (418)</button>
  <button class="btn" hx-get="/diagnostics/trigger-error?kind=unhandled" hx-trigger="click" hx-target="this" hx-swap="none">Trigger unhandled error (500)</button>
      <small class="muted">You should see a toast and an inline banner with Request-ID.</small>
    </div>
  </div>
  {% if show_logs %}
  <p style="margin-top:.75rem"><a class="btn" href="/logs">Open Logs</a></p>
  {% endif %}
</section>
<script>
(function(){
  var el = document.getElementById('sysSummary');
  function render(data){
    if (!el) return;
    try {
      var v = (data && data.version) || 'dev';
      var up = (data && data.uptime_seconds) || 0;
      var st = (data && data.server_time_utc) || '';
      var flags = (data && data.flags) || {};
      el.innerHTML = '<div><strong>Version:</strong> '+String(v)+'</div>'+
        (st ? '<div><strong>Server time (UTC):</strong> '+String(st)+'</div>' : '')+
        '<div><strong>Uptime:</strong> '+String(up)+'s</div>'+
        '<div><strong>Flags:</strong> '
          + 'SHOW_LOGS='+ (flags.SHOW_LOGS? '1':'0')
          + ', SHOW_DIAGNOSTICS='+ (flags.SHOW_DIAGNOSTICS? '1':'0')
          + ', SHOW_SETUP='+ (flags.SHOW_SETUP? '1':'0')
          + ', SHOW_COMMANDERS='+ (flags.SHOW_COMMANDERS? '1':'0')
          + ', RANDOM_MODES='+ (flags.RANDOM_MODES? '1':'0')
          + ', RANDOM_UI='+ (flags.RANDOM_UI? '1':'0')
          + ', RANDOM_MAX_ATTEMPTS='+ String(flags.RANDOM_MAX_ATTEMPTS ?? '')
          + ', RANDOM_TIMEOUT_MS='+ String(flags.RANDOM_TIMEOUT_MS ?? '')
        + '</div>';
    } catch(_){ el.textContent = 'Unavailable'; }
  }
  function load(){
    try { fetch('/status/sys', { cache: 'no-store' }).then(function(r){ return r.json(); }).then(render).catch(function(){ el.textContent='Unavailable'; }); } catch(_){ el.textContent='Unavailable'; }
  }
  load();
  // Environment flags card
  (function(){
    var target = document.getElementById('envFlags');
    if (!target) return;
    function renderEnv(data){
      if (!data || !data.flags) { target.textContent = 'Flags unavailable'; return; }
      var f = data.flags;
      function as01(v){ return (v ? '1' : '0'); }
      var lines = [];
      lines.push('<div><strong>Homepage & UI:</strong> '
        + 'SHOW_SETUP=' + as01(f.SHOW_SETUP)
        + ', SHOW_LOGS=' + as01(f.SHOW_LOGS)
        + ', SHOW_DIAGNOSTICS=' + as01(f.SHOW_DIAGNOSTICS)
        + ', SHOW_COMMANDERS=' + as01(f.SHOW_COMMANDERS)
        + ', ENABLE_THEMES=' + as01(f.ENABLE_THEMES)
        + ', ENABLE_CUSTOM_THEMES=' + as01(f.ENABLE_CUSTOM_THEMES)
        + ', ALLOW_MUST_HAVES=' + as01(f.ALLOW_MUST_HAVES)
        + ', THEME=' + String(f.DEFAULT_THEME || '')
        + ', THEME_MATCH_MODE=' + String(f.THEME_MATCH_MODE || '')
        + ', USER_THEME_LIMIT=' + String(f.USER_THEME_LIMIT || '')
        + '</div>');
      lines.push('<div><strong>Random:</strong> '
        + 'RANDOM_MODES=' + as01(f.RANDOM_MODES)
        + ', RANDOM_UI=' + as01(f.RANDOM_UI)
        + ', RANDOM_MAX_ATTEMPTS=' + String(f.RANDOM_MAX_ATTEMPTS || '')
        + ', RANDOM_TIMEOUT_MS=' + String(f.RANDOM_TIMEOUT_MS || '')
        + ', RANDOM_REROLL_THROTTLE_MS=' + String(f.RANDOM_REROLL_THROTTLE_MS || '')
        + ', RANDOM_TELEMETRY=' + as01(f.RANDOM_TELEMETRY)
        + ', RANDOM_STRUCTURED_LOGS=' + as01(f.RANDOM_STRUCTURED_LOGS)
        + '</div>');
      lines.push('<div><strong>Rate limiting (random):</strong> '
        + 'RATE_LIMIT_ENABLED=' + as01(f.RATE_LIMIT_ENABLED)
        + ', WINDOW_S=' + String(f.RATE_LIMIT_WINDOW_S || '')
        + ', RANDOM=' + String(f.RANDOM_RATE_LIMIT_RANDOM || '')
        + ', BUILD=' + String(f.RANDOM_RATE_LIMIT_BUILD || '')
        + ', SUGGEST=' + String(f.RANDOM_RATE_LIMIT_SUGGEST || '')
        + '</div>');
      target.innerHTML = lines.join('');
    }
    try { fetch('/status/sys', { cache: 'no-store' }).then(function(r){ return r.json(); }).then(renderEnv).catch(function(){ target.textContent='Flags unavailable'; }); } catch(_){ target.textContent='Flags unavailable'; }
  })();
  var themeSuppEl = document.getElementById('themeSuppMetrics');
  function renderThemeSupp(payload){
    if (!themeSuppEl) return;
    try {
      if (!payload || payload.ok !== true) {
        themeSuppEl.textContent = 'Theme metrics unavailable';
        return;
      }
      var metrics = payload.metrics || {};
      var total = metrics.total_builds != null ? Number(metrics.total_builds) : 0;
      if (!total) {
        themeSuppEl.textContent = 'No deck builds recorded yet.';
        return;
      }
      var withUser = metrics.with_user_themes != null ? Number(metrics.with_user_themes) : 0;
      var share = metrics.user_theme_share != null ? Number(metrics.user_theme_share) : 0;
      var sharePct = !Number.isNaN(share) ? (share * 100).toFixed(1) + '%' : '0%';
      var summary = metrics.last_summary || {};
      var commander = Array.isArray(summary.commanderThemes) ? summary.commanderThemes : [];
      var user = Array.isArray(summary.userThemes) ? summary.userThemes : [];
      var merged = Array.isArray(summary.mergedThemes) ? summary.mergedThemes : [];
      var unresolvedCount = summary.unresolvedCount != null ? Number(summary.unresolvedCount) : 0;
      var unresolved = Array.isArray(summary.unresolved) ? summary.unresolved : [];
      var mode = summary.mode || 'AND';
      var weight = summary.weight != null ? Number(summary.weight) : 1;
      var updated = metrics.last_updated || '';
      var topUser = Array.isArray(metrics.top_user_themes) ? metrics.top_user_themes : [];
      function joinList(arr){
        if (!arr || !arr.length) return '—';
        return arr.join(', ');
      }
      var html = '';
      html += '<div><strong>Total builds:</strong> ' + String(total) + ' (user themes ' + String(withUser) + '\u00a0| ' + sharePct + ')</div>';
      if (updated) {
        html += '<div style="font-size:11px;">Last updated: ' + String(updated) + '</div>';
      }
      html += '<div><strong>Commander themes:</strong> ' + joinList(commander) + '</div>';
      html += '<div><strong>User themes:</strong> ' + joinList(user) + '</div>';
      html += '<div><strong>Merged:</strong> ' + joinList(merged) + '</div>';
      var unresolvedLabel = '0';
      if (unresolvedCount > 0) {
        unresolvedLabel = String(unresolvedCount) + ' (' + joinList(unresolved) + ')';
      } else {
        unresolvedLabel = '0';
      }
      html += '<div><strong>Unresolved:</strong> ' + unresolvedLabel + '</div>';
      html += '<div style="font-size:11px;">Mode ' + String(mode) + ' · Weight ' + weight.toFixed(2) + '</div>';
      if (topUser.length) {
        var topLine = topUser.slice(0, 5).map(function(item){
          if (!item) return '';
          var t = item.theme != null ? String(item.theme) : '';
          var c = item.count != null ? String(item.count) : '0';
          return t + ' (' + c + ')';
        }).filter(Boolean);
        if (topLine.length) {
          html += '<div style="font-size:11px; opacity:0.75;">Top user themes: ' + topLine.join(', ') + '</div>';
        }
      }
      themeSuppEl.innerHTML = html;
    } catch (_){
      themeSuppEl.textContent = 'Theme metrics unavailable';
    }
  }
  function loadThemeSupp(){
    if (!themeSuppEl) return;
    themeSuppEl.textContent = 'Loading theme metrics…';
    fetch('/status/theme_metrics', { cache: 'no-store' })
      .then(function(resp){
        if (resp.status === 404) {
          themeSuppEl.textContent = 'Diagnostics disabled (metrics unavailable)';
          return null;
        }
        return resp.json();
      })
      .then(function(data){ if (data) renderThemeSupp(data); })
      .catch(function(){ themeSuppEl.textContent = 'Theme metrics unavailable'; });
  }
  loadThemeSupp();
  var tokenEl = document.getElementById('themeTokenStats');
  function renderTokens(payload){
    if (!tokenEl) return;
    try {
      if (!payload || payload.ok !== true) {
        tokenEl.textContent = 'Theme stats unavailable';
        return;
      }
      var stats = payload.stats || {};
      var top = Array.isArray(stats.top_tokens) ? stats.top_tokens.slice(0, 5) : [];
      var html = '';
  var commanders = (stats && stats.commanders != null) ? stats.commanders : '0';
  var withTags = (stats && stats.with_tags != null) ? stats.with_tags : '0';
  var uniqueTokens = (stats && stats.unique_tokens != null) ? stats.unique_tokens : '0';
  var assignments = (stats && stats.total_assignments != null) ? stats.total_assignments : '0';
  var avgTokens = (stats && stats.avg_tokens_per_commander != null) ? stats.avg_tokens_per_commander : '0';
  var medianTokens = (stats && stats.median_tokens_per_commander != null) ? stats.median_tokens_per_commander : '0';
  html += '<div><strong>Commanders indexed:</strong> ' + String(commanders) + ' (' + String(withTags) + ' with tags)</div>';
  html += '<div><strong>Theme tokens:</strong> ' + String(uniqueTokens) + ' unique; ' + String(assignments) + ' assignments</div>';
  html += '<div><strong>Tokens per commander:</strong> avg ' + String(avgTokens) + ', median ' + String(medianTokens) + '</div>';
      if (top.length) {
        var parts = [];
        top.forEach(function(item){
          parts.push(String(item.token) + ' (' + String(item.count) + ')');
        });
        html += '<div><strong>Top tokens:</strong> ' + parts.join(', ') + '</div>';
      }
      var pool = stats.random_pool || {};
      if (pool && typeof pool.size !== 'undefined'){
        var coveragePct = null;
        if (pool.coverage_ratio != null){
          var cov = Number(pool.coverage_ratio);
          if (!Number.isNaN(cov)){ coveragePct = (cov * 100).toFixed(1); }
        }
        html += '<div style="margin-top:0.35rem;"><strong>Curated random pool:</strong> ' + String(pool.size) + ' tokens';
        if (coveragePct !== null){ html += ' (' + coveragePct + '% of catalog tokens)'; }
        html += '</div>';
        var rules = pool.rules || {};
        var threshold = rules.overrepresented_share_threshold;
        if (threshold != null){
          var thrPct = Number(threshold);
          if (!Number.isNaN(thrPct)){ html += '<div style="font-size:11px;">Over-represented threshold: ≥ ' + (thrPct * 100).toFixed(1) + '% of commanders</div>'; }
        }
        var excludedCounts = pool.excluded_counts || {};
        var reasonKeys = Object.keys(excludedCounts);
        if (reasonKeys.length){
          var badges = reasonKeys.map(function(reason){
            return reason + ' (' + excludedCounts[reason] + ')';
          });
          html += '<div style="font-size:11px;">Exclusions: ' + badges.join(', ') + '</div>';
        }
        var samples = pool.excluded_samples || {};
        var sampleKeys = Object.keys(samples);
        if (sampleKeys.length){
          var sampleLines = [];
          sampleKeys.slice(0, 3).forEach(function(reason){
            var tokens = samples[reason] || [];
            var sampleTokens = (tokens || []).slice(0, 3);
            var remainder = Math.max((tokens || []).length - sampleTokens.length, 0);
            var tokenLabel = sampleTokens.join(', ');
            if (remainder > 0){ tokenLabel += ' +' + remainder; }
            sampleLines.push(reason + ': ' + tokenLabel);
          });
          html += '<div style="font-size:11px; opacity:0.75;">Samples → ' + sampleLines.join(' | ') + '</div>';
        }
        var manualDetail = pool.manual_exclusion_detail || {};
        var manualKeys = Object.keys(manualDetail);
        if (manualKeys.length){
          var manualSamples = manualKeys.slice(0, 3).map(function(token){
            var info = manualDetail[token] || {};
            var label = info.display || token;
            var cat = info.category ? (' [' + info.category + ']') : '';
            return label + cat;
          });
          var manualRemainder = Math.max(manualKeys.length - manualSamples.length, 0);
          var manualLine = manualSamples.join(', ');
          if (manualRemainder > 0){ manualLine += ' +' + manualRemainder; }
          html += '<div style="font-size:11px;">Manual exclusions: ' + manualLine + '</div>';
        }
  var manualGroups = Array.isArray(rules.manual_exclusions) ? rules.manual_exclusions : [];
        if (manualGroups.length){
          var categoryList = manualGroups.map(function(group){ return group.category || 'manual'; });
          html += '<div style="font-size:11px; opacity:0.75;">Manual categories: ' + categoryList.join(', ') + '</div>';
        }
      }
      var telemetry = stats.index_telemetry || {};
      if (telemetry && typeof telemetry.token_count !== 'undefined'){
        var hitRate = telemetry.hit_rate != null ? Number(telemetry.hit_rate) : null;
        var hitPct = (hitRate !== null && !Number.isNaN(hitRate)) ? (hitRate * 100).toFixed(1) : null;
        var teleLine = '<div style="font-size:11px; margin-top:0.25rem;">Tag index: ' + String(telemetry.token_count || 0) + ' tokens · lookups ' + String(telemetry.lookups || 0);
        if (hitPct !== null){ teleLine += ' · hit rate ' + hitPct + '%'; }
        if (telemetry.substring_checks){ teleLine += ' · substring checks ' + String(telemetry.substring_checks || 0); }
        teleLine += '</div>';
        html += teleLine;
      }
      tokenEl.innerHTML = html;
    } catch(_){
      tokenEl.textContent = 'Theme stats unavailable';
    }
  }
  function loadTokenStats(){
    if (!tokenEl) return;
    tokenEl.textContent = 'Loading theme stats…';
    fetch('/status/random_theme_stats', { cache: 'no-store' })
      .then(function(resp){
        if (resp.status === 404) {
          tokenEl.textContent = 'Diagnostics disabled (stats unavailable)';
          return null;
        }
        return resp.json();
      })
      .then(function(data){ if (data) renderTokens(data); })
      .catch(function(){ tokenEl.textContent = 'Theme stats unavailable'; });
  }
  loadTokenStats();
  var dfcMetricsEl = document.getElementById('dfcMetrics');
  function renderDfcMetrics(payload){
    if (!dfcMetricsEl) return;
    try {
      if (!payload || payload.ok !== true) {
        dfcMetricsEl.textContent = 'MDFC metrics unavailable';
        return;
      }
      var metrics = payload.metrics || {};
      var html = '';
      html += '<div><strong>Deck summaries observed:</strong> ' + String(metrics.total_builds || 0) + '</div>';
      var withDfc = Number(metrics.builds_with_mdfc || 0);
      var share = metrics.build_share != null ? Number(metrics.build_share) : null;
      if (!Number.isNaN(share) && share !== null) {
        share = (share * 100).toFixed(1);
      } else {
        share = null;
      }
      html += '<div><strong>With MDFCs:</strong> ' + String(withDfc);
      if (share !== null) {
        html += ' (' + share + '%)';
      }
      html += '</div>';
      var totalLands = Number(metrics.total_mdfc_lands || 0);
      var avg = metrics.avg_mdfc_lands != null ? Number(metrics.avg_mdfc_lands) : null;
      html += '<div><strong>Total MDFC lands:</strong> ' + String(totalLands);
      if (avg !== null && !Number.isNaN(avg)) {
        html += ' (avg ' + avg.toFixed(2) + ')';
      }
      html += '</div>';
      var top = metrics.top_cards || {};
      var topKeys = Object.keys(top);
      if (topKeys.length) {
        var items = topKeys.slice(0, 5).map(function(name){
          return name + ' (' + String(top[name]) + ')';
        });
        html += '<div style="font-size:11px;">Top MDFC sources: ' + items.join(', ') + '</div>';
      }
      var last = metrics.last_summary || {};
      if (typeof last.dfc_lands !== 'undefined') {
        html += '<div style="font-size:11px; margin-top:0.25rem;">Last summary: ' + String(last.dfc_lands || 0) + ' MDFC lands · total with MDFCs ' + String(last.with_dfc || 0) + '</div>';
      }
      if (metrics.last_updated) {
        html += '<div style="font-size:11px;">Updated: ' + String(metrics.last_updated) + '</div>';
      }
      dfcMetricsEl.innerHTML = html;
    } catch (_){
      dfcMetricsEl.textContent = 'MDFC metrics unavailable';
    }
  }
  function loadDfcMetrics(){
    if (!dfcMetricsEl) return;
    dfcMetricsEl.textContent = 'Loading MDFC metrics…';
    fetch('/status/dfc_metrics', { cache: 'no-store' })
      .then(function(resp){
        if (resp.status === 404) {
          dfcMetricsEl.textContent = 'Diagnostics disabled (metrics unavailable)';
          return null;
        }
        return resp.json();
      })
      .then(function(data){ if (data) renderDfcMetrics(data); })
      .catch(function(){ dfcMetricsEl.textContent = 'MDFC metrics unavailable'; });
  }
  loadDfcMetrics();
  // Theme status and reset
  try{
    var tEl = document.getElementById('themeSummary');
    var resetBtn = document.getElementById('diag-theme-reset');
    function renderTheme(){
      if (!tEl) return;
      var key = 'mtg:theme';
      var stored = localStorage.getItem(key);
      var html = '';
      var resolved = document.documentElement.getAttribute('data-theme') || '';
      html += '<div><strong>Resolved theme:</strong> ' + resolved + '</div>';
      html += '<div><strong>Preference:</strong> ' + (stored ? stored : '(none)') + '</div>';
      tEl.innerHTML = html;
    }
    renderTheme();
    if (resetBtn){
      resetBtn.addEventListener('click', function(){
        try{ localStorage.removeItem('mtg:theme'); }catch(_){ }
        // Re-apply from server default via base script by simulating system apply
        try{
          var prefersDark = window.matchMedia && window.matchMedia('(prefers-color-scheme: dark)').matches;
          var v = prefersDark ? 'dark' : 'light-blend';
          document.documentElement.setAttribute('data-theme', v);
        }catch(_){ }
        renderTheme();
      });
    }
  }catch(_){ }
  // Combos & synergies ad-hoc tester
  try{
    var runBtn = document.getElementById('diag-combos-run');
    var ta = document.getElementById('diag-combos-input');
    var out = document.getElementById('diag-combos-out');
    function parseLines(){
      var v = (ta && ta.value) || '';
      return v.split(/\r?\n/).map(function(s){ return s.trim(); }).filter(Boolean);
    }
    async function run(){
      if (!ta || !out) return;
      out.textContent = 'Running…';
      try{
        var resp = await fetch('/diagnostics/combos', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ names: parseLines() })});
        if (!resp.ok){ out.textContent = 'Error '+resp.status; return; }
        var data = await resp.json();
        var lines = [];
        // Versions
        try{
          if (data.versions){
            var vLine = 'List versions: ';
            if (data.versions.combos) vLine += 'combos v'+ String(data.versions.combos);
            if (data.versions.synergies) vLine += (data.versions.combos? ', ' : '') + 'synergies v'+ String(data.versions.synergies);
            lines.push(vLine);
          }
        }catch(_){ }
        lines.push('Combos: '+ data.counts.combos);
        (data.combos||[]).forEach(function(c){
          var badges = [];
          if (c.cheap_early) badges.push('cheap/early');
          if (c.setup_dependent) badges.push('setup-dependent');
          var tagStr = (c.tags && c.tags.length? ' ['+c.tags.join(', ')+']' : '');
          var badgeStr = badges.length ? ' {'+badges.join(', ')+'}' : '';
          lines.push(' - '+c.a+' + '+c.b+ tagStr + badgeStr);
        });
        lines.push('Synergies: '+ data.counts.synergies);
        (data.synergies||[]).forEach(function(s){ lines.push(' - '+s.a+' + '+s.b+(s.tags && s.tags.length? ' ['+s.tags.join(', ')+']':'')); });
        out.textContent = lines.join('\n');
      }catch(e){ out.textContent = 'Failed: '+ (e && e.message? e.message : 'Unknown error'); }
    }
    if (runBtn){ runBtn.addEventListener('click', run); }
  }catch(_){ }
  try{
    var p = document.getElementById('pwaStatus');
    if (p){
      function renderPwa(){
        try{
          var st = window.__pwaStatus || {};
          p.innerHTML = '<div><strong>Registered:</strong> '+ (st.registered? 'Yes':'No') +'</div>' + (st.scope? '<div><strong>Scope:</strong> '+ st.scope +'</div>' : '');
        }catch(_){ p.textContent = 'Unavailable'; }
      }
      setTimeout(renderPwa, 500);
    }
  }catch(_){ }
  // Perf probe: listen to scroll on a card grid if present
  try{
    var fpsEl = document.getElementById('perf-fps');
    var visEl = document.getElementById('perf-visible');
    var rcEl = document.getElementById('perf-renders');
    var grid = document.querySelector('.card-grid');
    var last = performance.now();
    var frames = 0; var renders = 0;
    function tick(){
      frames++;
      var now = performance.now();
      if (now - last >= 500){
        var fps = Math.round((frames * 1000) / (now - last));
        if (fpsEl) fpsEl.textContent = String(fps);
        frames = 0; last = now;
      }
      requestAnimationFrame(tick);
    }
    requestAnimationFrame(tick);
    function updateVisible(){
      try{
        if (!grid) return;
        var tiles = grid.querySelectorAll('.card-tile');
        var c = 0; tiles.forEach(function(t){ if (t.style.display !== 'none') c++; });
        if (visEl) visEl.textContent = String(c);
      }catch(_){ }
    }
    if (grid){
      grid.addEventListener('scroll', updateVisible);
      var mo = new MutationObserver(function(){ renders++; if (rcEl) rcEl.textContent = String(renders); updateVisible(); });
      mo.observe(grid, { childList: true, subtree: true, attributes: false });
      updateVisible();
    }
  }catch(_){ }
})();
</script>
{% endblock %}