(function() {
  const app = document.getElementById('app');

  let ws = null;
  let wsReconnectTimeout = null;
  const wsCallbacks = new Set();

  let sessionsState = { sessions: [], cursor: null };
  let openclawState = { instances: {} };
  let openclawUnsubscribe = null;
  let agentsState = createAgentsState();
  let agentsUnsubscribe = null;
  let dashboardState = null;
  let dashboardUnsubscribe = null;
  let dashboardChart = null;
  let dashboardResizeObserver = null;

  function getWsURL() {
    const protocol = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
    return protocol + '//' + window.location.host + '/api/v1/ws';
  }

  function connectWS() {
    if (ws && (ws.readyState === WebSocket.OPEN || ws.readyState === WebSocket.CONNECTING)) {
      return;
    }

    try {
      ws = new WebSocket(getWsURL());

      ws.onopen = () => {
        console.log('WebSocket connected');
        wsCallbacks.forEach(cb => cb({ type: 'connected' }));
      };

      ws.onmessage = (event) => {
        try {
          const data = JSON.parse(event.data);
          wsCallbacks.forEach(cb => cb({ type: 'message', data }));
        } catch (e) {
          console.error('Failed to parse WS message:', e);
        }
      };

      ws.onclose = () => {
        console.log('WebSocket disconnected');
        wsCallbacks.forEach(cb => cb({ type: 'disconnected' }));
        wsReconnectTimeout = setTimeout(connectWS, 5000);
      };

      ws.onerror = (err) => {
        console.error('WebSocket error:', err);
      };
    } catch (e) {
      console.error('Failed to connect WebSocket:', e);
      wsReconnectTimeout = setTimeout(connectWS, 5000);
    }
  }

  function subscribeWS(callback) {
    wsCallbacks.add(callback);
    if (!ws || ws.readyState !== WebSocket.OPEN) {
      connectWS();
    }
    return () => wsCallbacks.delete(callback);
  }

  function cleanupLiveViews() {
    if (openclawUnsubscribe) {
      openclawUnsubscribe();
      openclawUnsubscribe = null;
    }
    if (agentsUnsubscribe) {
      agentsUnsubscribe();
      agentsUnsubscribe = null;
    }
    if (dashboardUnsubscribe) {
      dashboardUnsubscribe();
      dashboardUnsubscribe = null;
    }
    if (dashboardChart) {
      dashboardChart.destroy();
      dashboardChart = null;
    }
    if (dashboardResizeObserver) {
      dashboardResizeObserver.disconnect();
      dashboardResizeObserver = null;
    }
  }

  function route() {
    cleanupLiveViews();

    const path = window.location.pathname;
    if (path === '/') {
      renderDashboard();
    } else if (path === '/sessions') {
      renderSessions();
    } else if (path.startsWith('/agents')) {
      renderAgents();
    } else if (path.startsWith('/openclaw')) {
      renderOpenClaw();
    } else if (path.startsWith('/sessions/')) {
      renderSession(path.split('/sessions/')[1]);
    } else if (path.startsWith('/runs/')) {
      renderRun(path.split('/runs/')[1]);
    } else {
      app.innerHTML = '<p>Page not found</p>';
    }
    updateActiveNav();
  }

  function navigate(path) {
    history.pushState(null, '', path);
    route();
  }

  function updateActiveNav() {
    const path = window.location.pathname;
    document.querySelectorAll('header nav a').forEach(a => {
      const href = a.getAttribute('href');
      const isActive = href === '/'
        ? path === '/'
        : path.startsWith(href);
      a.classList.toggle('active', isActive);
    });
  }

  window.addEventListener('popstate', route);

  async function api(path) {
    const resp = await fetch('/api' + path);
    if (!resp.ok) {
      throw new Error('API error');
    }
    return resp.json();
  }

  function escapeHTML(value) {
    return String(value ?? '')
      .replace(/&/g, '&amp;')
      .replace(/</g, '&lt;')
      .replace(/>/g, '&gt;')
      .replace(/"/g, '&quot;')
      .replace(/'/g, '&#39;');
  }

  function relativeTime(ts) {
    if (!ts) {
      return '-';
    }

    const now = Date.now();
    const then = new Date(ts).getTime();
    const diff = now - then;

    if (diff < 60000) return 'just now';
    if (diff < 3600000) return Math.floor(diff / 60000) + 'm ago';
    if (diff < 86400000) return Math.floor(diff / 3600000) + 'h ago';
    return Math.floor(diff / 86400000) + 'd ago';
  }

  function formatDuration(ms) {
    if (ms === undefined || ms === null || ms === '') return '-';
    if (ms < 1000) return ms + 'ms';
    if (ms < 60000) return (ms / 1000).toFixed(1) + 's';
    return (ms / 60000).toFixed(1) + 'm';
  }

  function formatBytes(bytes) {
    if (!bytes) return null;
    const units = ['B', 'KB', 'MB', 'GB', 'TB'];
    let unitIndex = 0;
    let value = bytes;
    while (value >= 1024 && unitIndex < units.length - 1) {
      value /= 1024;
      unitIndex++;
    }
    return value.toFixed(1) + ' ' + units[unitIndex];
  }

  function statusIcon(status) {
    if (status === 'success') return '<span class="status-badge status-success"><span class="status-dot"></span>success</span>';
    if (status === 'error') return '<span class="status-badge status-error"><span class="status-dot"></span>error</span>';
    return '<span class="status-badge status-unknown"><span class="status-dot"></span>unknown</span>';
  }

  function extractEnvelope(record) {
    if (record && typeof record === 'object' && record.payload && record.payload.event && record.payload.schema) {
      return record.payload;
    }
    return record || {};
  }

  function getEnvelopeEvent(record) {
    const envelope = extractEnvelope(record);
    return envelope.event || envelope.Event || {};
  }

  function getEnvelopeType(record) {
    return record?.type || getEnvelopeEvent(record).type || '';
  }

  function getEnvelopeTS(record) {
    return record?.ts || getEnvelopeEvent(record).ts || '';
  }

  function getEnvelopeSource(record) {
    return getEnvelopeEvent(record).source || {};
  }

  function getEnvelopePayload(record) {
    const envelope = extractEnvelope(record);
    return envelope.payload || envelope.Payload || {};
  }

  function getEnvelopeAttributes(record) {
    const envelope = extractEnvelope(record);
    return envelope.attributes || envelope.Attributes || {};
  }

  function getEnvelopeCorrelation(record) {
    const envelope = extractEnvelope(record);
    return envelope.correlation || envelope.Correlation || {};
  }

  function getRecordID(record) {
    return record?.event_id || getEnvelopeEvent(record).id || '';
  }

  function isCurrentPath(prefix) {
    return window.location.pathname.startsWith(prefix);
  }

  async function renderSessions() {
    app.innerHTML = `
      <div class="page-header">
        <h2>Sessions</h2>
      </div>
      <div class="filters">
        <label>From <input type="date" id="filter-from"></label>
        <label>To <input type="date" id="filter-to"></label>
        <label>Framework
          <select id="filter-framework">
            <option value="">All</option>
            <option value="claude-code">claude-code</option>
            <option value="opencode">opencode</option>
            <option value="openclaw">openclaw</option>
          </select>
        </label>
        <label>Host <input type="text" id="filter-host" placeholder="hostname"></label>
      </div>
      <div class="table-container">
        <table>
          <thead>
            <tr>
              <th>Session</th>
              <th>Framework</th>
              <th>Host</th>
              <th>Runs</th>
              <th>Time</th>
            </tr>
          </thead>
          <tbody id="sessions-body"></tbody>
        </table>
      </div>
      <button id="load-more" class="load-more" style="display:none">Load more</button>
    `;

    ['from', 'to', 'framework', 'host'].forEach(f => {
      document.getElementById('filter-' + f).addEventListener('change', () => {
        sessionsState.sessions = [];
        sessionsState.cursor = null;
        loadSessions();
      });
    });

    document.getElementById('load-more').addEventListener('click', loadSessions);

    sessionsState = { sessions: [], cursor: null };
    await loadSessions();
  }

  async function loadSessions() {
    const params = new URLSearchParams();
    const from = document.getElementById('filter-from').value;
    const to = document.getElementById('filter-to').value;
    const framework = document.getElementById('filter-framework').value;
    const host = document.getElementById('filter-host').value;

    if (from) params.set('from', from);
    if (to) params.set('to', to);
    if (framework) params.set('framework', framework);
    if (host) params.set('host', host);
    if (sessionsState.cursor) params.set('cursor', sessionsState.cursor);

    const data = await api('/v1/sessions?' + params.toString());
    sessionsState.sessions = sessionsState.sessions.concat(data.sessions || []);
    sessionsState.cursor = data.next_cursor;

    const tbody = document.getElementById('sessions-body');
    tbody.innerHTML = sessionsState.sessions.map(s => {
      const fw = s.framework || 'unknown';
      const fwClass = fw.replace(/[^a-z0-9-]/g, '-');
      return `
        <tr class="clickable" data-session="${escapeHTML(s.session_id)}">
          <td class="id-cell">${escapeHTML(s.session_id.substring(0, 12))}…</td>
          <td><span class="fw-dot ${escapeHTML(fwClass)}"></span>${escapeHTML(fw)}</td>
          <td>${escapeHTML(s.host || '-')}</td>
          <td>${s.run_count}</td>
          <td title="${escapeHTML(s.started_at)}">${escapeHTML(relativeTime(s.started_at))}</td>
        </tr>
      `;
    }).join('') || '<tr><td colspan="5" class="empty-state">No sessions found</td></tr>';

    tbody.querySelectorAll('tr.clickable').forEach(row => {
      row.addEventListener('click', () => navigate('/sessions/' + row.dataset.session));
    });

    document.getElementById('load-more').style.display = sessionsState.cursor ? 'block' : 'none';
  }

  async function renderSession(sessionID) {
    const data = await api('/v1/sessions/' + sessionID);
    const s = data.session;
    const runs = data.runs || [];
    const duration = s.ended_at
      ? formatDuration(new Date(s.ended_at) - new Date(s.started_at))
      : 'ongoing';

    app.innerHTML = `
      <a href="/sessions" class="back-link">&larr; Back to Sessions</a>
      <div class="page-header">
        <h2>Session <span style="font-family:var(--font-mono);font-size:1.1rem;color:var(--accent)">${escapeHTML(sessionID.substring(0, 16))}...</span></h2>
        <div class="meta-tiles">
          <div class="meta-tile">
            <div class="meta-tile-label">Started</div>
            <div class="meta-tile-value">${escapeHTML(new Date(s.started_at).toLocaleString())}</div>
          </div>
          <div class="meta-tile">
            <div class="meta-tile-label">Framework</div>
            <div class="meta-tile-value">${escapeHTML(s.framework || '-')}</div>
          </div>
          <div class="meta-tile">
            <div class="meta-tile-label">Host</div>
            <div class="meta-tile-value">${escapeHTML(s.host || '-')}</div>
          </div>
          <div class="meta-tile">
            <div class="meta-tile-label">Duration</div>
            <div class="meta-tile-value">${escapeHTML(duration)}</div>
          </div>
        </div>
      </div>
      <div class="section-title">Runs <span class="count">${runs.length}</span></div>
      <div class="table-container">
        <table>
          <thead>
            <tr>
              <th>Run ID</th>
              <th>Status</th>
              <th>Spans</th>
              <th>Duration</th>
              <th>Started</th>
            </tr>
          </thead>
          <tbody>
            ${runs.map(r => {
              const runDuration = r.ended_at
                ? formatDuration(new Date(r.ended_at) - new Date(r.started_at))
                : '-';
              return `
                <tr class="clickable" data-run="${escapeHTML(r.run_id)}">
                  <td class="id-cell">${escapeHTML(r.run_id.substring(0, 12))}...</td>
                  <td>${statusIcon(r.status)}</td>
                  <td>${r.span_count}</td>
                  <td>${escapeHTML(runDuration)}</td>
                  <td>${escapeHTML(new Date(r.started_at).toLocaleTimeString())}</td>
                </tr>
              `;
            }).join('') || '<tr><td colspan="5" class="empty-state">No runs</td></tr>'}
          </tbody>
        </table>
      </div>
    `;

    document.querySelectorAll('tr.clickable').forEach(row => {
      row.addEventListener('click', () => navigate('/runs/' + row.dataset.run));
    });

    document.querySelector('.back-link').addEventListener('click', e => {
      e.preventDefault();
      navigate('/sessions');
    });
  }

  async function renderRun(runID) {
    const data = await api('/v1/runs/' + runID);
    const r = data.run;
    const spans = data.spans || [];
    const duration = r.ended_at
      ? formatDuration(new Date(r.ended_at) - new Date(r.started_at))
      : 'ongoing';

    app.innerHTML = `
      <a href="/sessions/${escapeHTML(r.session_id)}" class="back-link">&larr; Back to Session</a>
      <div class="page-header">
        <h2>Run <span style="font-family:var(--font-mono);font-size:1.1rem;color:var(--accent)">${escapeHTML(runID.substring(0, 16))}...</span> ${statusIcon(r.status)}</h2>
        <div class="meta-tiles">
          <div class="meta-tile">
            <div class="meta-tile-label">Started</div>
            <div class="meta-tile-value">${escapeHTML(new Date(r.started_at).toLocaleString())}</div>
          </div>
          <div class="meta-tile">
            <div class="meta-tile-label">Duration</div>
            <div class="meta-tile-value">${escapeHTML(duration)}</div>
          </div>
        </div>
      </div>
      <div class="section-title">Spans <span class="count">${spans.length}</span></div>
      <div class="table-container">
        <table>
          <thead>
            <tr>
              <th>Name</th>
              <th>Kind</th>
              <th>Status</th>
              <th>Duration</th>
            </tr>
          </thead>
          <tbody id="spans-body">
            ${spans.map((sp, i) => `
              <tr class="expandable" data-index="${i}">
                <td><span class="expand-icon"></span>${escapeHTML(sp.name)}</td>
                <td>${escapeHTML(sp.kind)}</td>
                <td>${statusIcon(sp.status)}</td>
                <td>${escapeHTML(formatDuration(sp.duration_ms))}</td>
              </tr>
              <tr class="span-detail-row" data-index="${i}" style="display:none">
                <td colspan="4">
                  <div class="span-details">${escapeHTML(JSON.stringify(sp.payload, null, 2))}</div>
                </td>
              </tr>
            `).join('') || '<tr><td colspan="4" class="empty-state">No spans</td></tr>'}
          </tbody>
        </table>
      </div>
    `;

    document.querySelectorAll('tr.expandable').forEach(row => {
      row.addEventListener('click', () => {
        const idx = row.dataset.index;
        const detailRow = document.querySelector(`tr.span-detail-row[data-index="${idx}"]`);
        const icon = row.querySelector('.expand-icon');
        if (detailRow.style.display === 'none') {
          detailRow.style.display = 'table-row';
          icon.style.transform = 'rotate(45deg)';
        } else {
          detailRow.style.display = 'none';
          icon.style.transform = '';
        }
      });
    });

    document.querySelector('.back-link').addEventListener('click', e => {
      e.preventDefault();
      navigate('/sessions/' + r.session_id);
    });
  }

  async function renderOpenClaw() {
    app.innerHTML = '<div class="page-header"><h2>OpenClaw</h2></div><p class="empty-state">Loading...</p>';

    openclawUnsubscribe = subscribeWS(handleOpenClawWS);

    try {
      const data = await api('/v1/events?event_type=openclaw.snapshot&limit=100');
      mergeOpenClawEvents(data.events || []);
      if (isCurrentPath('/openclaw')) {
        renderOpenClawGrid();
      }
    } catch (e) {
      if (isCurrentPath('/openclaw')) {
        app.innerHTML = `<div class="page-header"><h2>OpenClaw</h2></div><p class="empty-state">Error loading: ${escapeHTML(e.message)}</p>`;
      }
    }
  }

  function handleOpenClawWS(msg) {
    if (msg.type !== 'message') {
      return;
    }

    if (getEnvelopeType(msg.data) !== 'openclaw.snapshot') {
      return;
    }

    mergeOpenClawEvents([msg.data]);

    if (isCurrentPath('/openclaw')) {
      renderOpenClawGrid();
    }
    if (isCurrentPath('/agents')) {
      renderAgentVMStrip();
    }
  }

  function mergeOpenClawEvents(events) {
    for (const evt of events) {
      const payload = getEnvelopePayload(evt);
      const instance = payload.instance || {};
      if (!instance.name) {
        continue;
      }

      const existing = openclawState.instances[instance.name];
      const nextTS = new Date(getEnvelopeTS(evt) || 0).getTime();
      const currentTS = existing ? new Date(getEnvelopeTS(existing) || 0).getTime() : 0;
      if (!existing || nextTS >= currentTS) {
        openclawState.instances[instance.name] = evt;
      }
    }
  }

  function renderOpenClawGrid() {
    const names = Object.keys(openclawState.instances).sort();

    if (names.length === 0) {
      app.innerHTML = `
        <div class="page-header"><h2>OpenClaw</h2></div>
        <p class="empty-state">No OpenClaw instances found</p>
      `;
      return;
    }

    app.innerHTML = `
      <div class="page-header">
        <h2>OpenClaw <span class="live-indicator"><span class="live-dot"></span>Live</span></h2>
      </div>
      <div class="vm-grid">
        ${names.map(name => {
          const evt = openclawState.instances[name];
          const payload = getEnvelopePayload(evt);
          const inst = payload.instance || {};
          const host = payload.host || {};
          const guest = payload.guest;
          const issues = payload.issues;

          return `
            <div class="vm-card">
              <div class="vm-card-header">
                <h3>${escapeHTML(inst.name || name)}</h3>
                <div class="vm-status ${host.state === 'running' ? 'running' : 'stopped'}">
                  ${host.state === 'running' ? 'Running' : 'Stopped'}
                </div>
              </div>
              <div class="vm-updated">Updated ${escapeHTML(relativeTime(getEnvelopeTS(evt)))}</div>
              <table class="vm-stats">
                <tr><td>Host</td><td>${escapeHTML(inst.host || '-')}</td></tr>
                <tr><td>Domain</td><td>${escapeHTML(inst.domain || '-')}</td></tr>
                <tr><td>vCPUs</td><td>${host.vcpus || '-'}</td></tr>
                <tr><td>Memory</td><td>${escapeHTML(formatBytes(host.memory_kib ? host.memory_kib * 1024 : 0) || '-')}</td></tr>
                <tr><td>Disk</td><td>${escapeHTML(formatBytes(host.disk_actual_bytes) || '-')}</td></tr>
                <tr><td>Autostart</td><td>${host.autostart ? 'Yes' : 'No'}</td></tr>
                ${guest ? `
                  <tr><td>Gateway</td><td class="${guest.service_active ? 'status-success' : 'status-error'}">${guest.service_active ? 'Active' : 'Inactive'}</td></tr>
                  <tr><td>HTTP</td><td class="${guest.http_status === 200 ? 'status-success' : 'status-error'}">${guest.http_status || 'N/A'}</td></tr>
                  <tr><td>Version</td><td>${escapeHTML(guest.version || '-')}</td></tr>
                  <tr><td>Guest Memory</td><td>${guest.memory_percent !== undefined ? guest.memory_percent.toFixed(1) : '-'}%</td></tr>
                  <tr><td>Guest Disk</td><td>${guest.disk_percent !== undefined ? guest.disk_percent.toFixed(1) : '-'}%</td></tr>
                  <tr><td>Load</td><td>${guest.load_average !== undefined ? guest.load_average.toFixed(2) : '-'}</td></tr>
                  <tr><td>Uptime</td><td>${escapeHTML(guest.service_uptime || '-')}</td></tr>
                ` : ''}
              </table>
              ${issues ? `
                <div class="vm-issues">
                  ${Object.entries(issues).filter(([, value]) => value).map(([key]) => `
                    <span class="issue ${escapeHTML(key)}">${escapeHTML(key.replace(/_/g, ' '))}</span>
                  `).join('')}
                </div>
              ` : ''}
            </div>
          `;
        }).join('')}
      </div>
    `;
  }

  function createAgentsState() {
    return {
      events: [],
      eventIDs: new Set(),
      stats: {
        messages: 0,
        tools: 0,
        errors: 0,
        toolCounts: {},
      },
    };
  }

  function getVMStatus() {
    const names = ['zap', 'orb', 'sun'];
    return names.map(name => {
      const snapshot = openclawState.instances[name];
      const payload = snapshot ? getEnvelopePayload(snapshot) : {};
      const host = payload.host || {};
      return {
        name,
        active: host.state === 'running',
      };
    });
  }

  async function renderAgents() {
    agentsState = createAgentsState();

    app.innerHTML = `
      <div class="page-header">
        <h2>Agents <span class="live-indicator"><span class="live-dot"></span>Live</span></h2>
      </div>
      <div class="vm-strip" id="agents-vm-strip"></div>
      <div class="agents-layout">
        <div class="timeline" id="agents-timeline">
          <p class="empty-state">Loading agent activity...</p>
        </div>
        <div class="stats-panel">
          <div class="stat-card" style="--card-accent:var(--accent)">
            <div class="stat-card-title">Messages</div>
            <div class="stat-card-value" id="stat-messages">0</div>
            <div class="stat-card-sub">received and sent</div>
          </div>
          <div class="stat-card" style="--card-accent:var(--purple)">
            <div class="stat-card-title">Tool Calls</div>
            <div class="stat-card-value" id="stat-tools">0</div>
          </div>
          <div class="stat-card" style="--card-accent:var(--error)">
            <div class="stat-card-title">Errors</div>
            <div class="stat-card-value" id="stat-errors">0</div>
          </div>
          <div class="stat-card">
            <div class="stat-card-title">Top Tools</div>
            <ul class="stat-list" id="stat-top-tools">
              <li style="color:var(--text-dim);font-size:0.8rem">No data yet</li>
            </ul>
          </div>
        </div>
      </div>
    `;

    renderAgentVMStrip();

    try {
      const [snapshots, events] = await Promise.all([
        api('/v1/events?event_type=openclaw.snapshot&limit=100').catch(() => ({ events: [] })),
        api('/v1/events?framework=openclaw&limit=200'),
      ]);

      if (!isCurrentPath('/agents')) {
        return;
      }

      mergeOpenClawEvents(snapshots.events || []);
      renderAgentVMStrip();
      addAgentEvents((events.events || []).slice().reverse());
      renderAgentTimeline();
      renderAgentStats();
    } catch (e) {
      const timeline = document.getElementById('agents-timeline');
      if (timeline) {
        timeline.innerHTML = `<p class="empty-state">Error loading agent activity: ${escapeHTML(e.message)}</p>`;
      }
    }

    agentsUnsubscribe = subscribeWS(handleAgentsWS);
  }

  function renderAgentVMStrip() {
    const strip = document.getElementById('agents-vm-strip');
    if (!strip) {
      return;
    }

    const vms = getVMStatus();
    strip.innerHTML = vms.map(vm => `
      <div class="vm-pill ${vm.active ? 'active' : 'inactive'}">
        <span class="vm-pill-dot"></span>
        <span class="vm-pill-name">${escapeHTML(vm.name)}</span>
        <span class="vm-pill-label">${vm.active ? 'online' : 'offline'}</span>
      </div>
    `).join('');
  }

  function handleAgentsWS(msg) {
    if (msg.type !== 'message') {
      return;
    }

    const eventType = getEnvelopeType(msg.data);
    if (eventType === 'openclaw.snapshot') {
      mergeOpenClawEvents([msg.data]);
      renderAgentVMStrip();
      return;
    }

    const framework = getEnvelopeSource(msg.data).framework || msg.data.source_framework;
    if (framework !== 'openclaw') {
      return;
    }

    addAgentEvents([msg.data]);
    renderAgentTimeline();
    renderAgentStats();
  }

  function addAgentEvents(events) {
    let changed = false;

    for (const evt of events) {
      const id = getRecordID(evt);
      if (!id || agentsState.eventIDs.has(id)) {
        continue;
      }
      agentsState.eventIDs.add(id);
      agentsState.events.push(evt);
      changed = true;
    }

    if (!changed) {
      return;
    }

    agentsState.events.sort((a, b) => new Date(getEnvelopeTS(a)).getTime() - new Date(getEnvelopeTS(b)).getTime());

    while (agentsState.events.length > 500) {
      const removed = agentsState.events.shift();
      agentsState.eventIDs.delete(getRecordID(removed));
    }

    recomputeAgentStats();
  }

  function recomputeAgentStats() {
    const stats = {
      messages: 0,
      tools: 0,
      errors: 0,
      toolCounts: {},
    };

    for (const evt of agentsState.events) {
      const eventType = getEnvelopeType(evt);
      const attrs = getEnvelopeAttributes(evt);

      if (eventType === 'run.start' || eventType === 'run.end') {
        stats.messages++;
      }

      if (eventType === 'span.end' && attrs.span_kind === 'tool') {
        stats.tools++;
        const toolName = attrs.name || 'unknown';
        stats.toolCounts[toolName] = (stats.toolCounts[toolName] || 0) + 1;
      }

      if (eventType === 'error') {
        stats.errors++;
      }
    }

    agentsState.stats = stats;
  }

  function getEventIcon(eventType) {
    switch (eventType) {
      case 'run.start':
        return '<div class="event-icon message-in">&#8595;</div>';
      case 'run.end':
        return '<div class="event-icon message-out">&#8593;</div>';
      case 'span.start':
      case 'span.end':
        return '<div class="event-icon tool">&#9881;</div>';
      case 'error':
        return '<div class="event-icon error">!</div>';
      case 'session.start':
      case 'session.end':
        return '<div class="event-icon session">&#9675;</div>';
      default:
        return '<div class="event-icon internal">&#183;</div>';
    }
  }

  function getEventLabel(eventType) {
    const labels = {
      'session.start': 'Session Started',
      'session.end': 'Session Ended',
      'run.start': 'Message Received',
      'run.end': 'Response Sent',
      'span.start': 'Span Started',
      'span.end': 'Span Completed',
      'error': 'Error',
      'metric.snapshot': 'Metric',
    };
    return labels[eventType] || eventType;
  }

  function getVMName(evt) {
    return getEnvelopeSource(evt).client_id || evt.client_id || 'unknown';
  }

  function getVMClassName(vmName) {
    const normalized = String(vmName || 'unknown').toLowerCase();
    return ['zap', 'orb', 'sun'].includes(normalized) ? normalized : 'unknown';
  }

  function getEventBody(evt) {
    const eventType = getEnvelopeType(evt);
    const payload = getEnvelopePayload(evt);
    const attrs = getEnvelopeAttributes(evt);
    const correlation = getEnvelopeCorrelation(evt);

    if (eventType === 'span.start' || eventType === 'span.end') {
      const name = attrs.name || attrs.span_kind || 'unknown span';
      const duration = payload.duration_ms !== undefined && payload.duration_ms !== null
        ? ` <span class="timeline-duration">${escapeHTML(formatDuration(payload.duration_ms))}</span>`
        : '';
      return `<div class="timeline-event-body tool-name">${escapeHTML(name)}${duration}</div>`;
    }

    if (eventType === 'run.start') {
      const preview = payload.message_preview || payload.message || '';
      if (!preview) {
        return '';
      }
      const trimmed = preview.length > 140 ? preview.slice(0, 140) + '...' : preview;
      return `<div class="timeline-event-body message-preview">"${escapeHTML(trimmed)}"</div>`;
    }

    if (eventType === 'run.end') {
      return `<div class="timeline-event-body">${statusIcon(payload.status || 'unknown')}</div>`;
    }

    if (eventType === 'error') {
      const errPayload = payload.error || {};
      const errType = errPayload.type || 'error';
      const message = errPayload.message || payload.message || 'unknown';
      return `<div class="timeline-event-body error-message">${escapeHTML(errType + ': ' + message)}</div>`;
    }

    if (eventType === 'session.start' || eventType === 'session.end') {
      return correlation.session_id
        ? `<div class="timeline-event-body">session ${escapeHTML(correlation.session_id)}</div>`
        : '';
    }

    return '';
  }

  function getEventDetails(evt) {
    const details = {};
    const correlation = getEnvelopeCorrelation(evt);
    const attributes = getEnvelopeAttributes(evt);
    const payload = getEnvelopePayload(evt);

    if (Object.keys(correlation).length > 0) {
      details.correlation = correlation;
    }
    if (Object.keys(attributes).length > 0) {
      details.attributes = attributes;
    }
    if (Object.keys(payload).length > 0) {
      details.payload = payload;
    }

    if (Object.keys(details).length === 0) {
      return '';
    }

    return JSON.stringify(details, null, 2);
  }

  function renderAgentTimeline() {
    const timeline = document.getElementById('agents-timeline');
    if (!timeline) {
      return;
    }

    const recent = agentsState.events.slice(-100).reverse();
    if (recent.length === 0) {
      timeline.innerHTML = '<p class="empty-state">Waiting for agent activity...</p>';
      return;
    }

    timeline.innerHTML = recent.map((evt, index) => {
      const eventType = getEnvelopeType(evt);
      const vmName = getVMName(evt);
      const vmClass = getVMClassName(vmName);
      const details = getEventDetails(evt);
      const detailHTML = details ? `<div class="timeline-detail">${escapeHTML(details)}</div>` : '';
      const expandHTML = details ? '<button class="timeline-expand-hint" type="button">details</button>' : '';

      return `
        <div class="timeline-event" data-index="${index}">
          <div class="timeline-event-header">
            ${getEventIcon(eventType)}
            <span class="timeline-vm-tag ${vmClass}">${escapeHTML(vmName)}</span>
            <span class="timeline-event-type">${escapeHTML(getEventLabel(eventType))}</span>
            <span class="timeline-event-time">${escapeHTML(new Date(getEnvelopeTS(evt)).toLocaleTimeString())}</span>
          </div>
          ${getEventBody(evt)}
          ${expandHTML}
          ${detailHTML}
        </div>
      `;
    }).join('');

    timeline.querySelectorAll('.timeline-expand-hint').forEach(button => {
      button.addEventListener('click', () => {
        button.parentElement.classList.toggle('expanded');
      });
    });
  }

  function renderAgentStats() {
    const stats = agentsState.stats;

    const messagesEl = document.getElementById('stat-messages');
    if (messagesEl) {
      messagesEl.textContent = String(stats.messages);
    }

    const toolsEl = document.getElementById('stat-tools');
    if (toolsEl) {
      toolsEl.textContent = String(stats.tools);
    }

    const errorsEl = document.getElementById('stat-errors');
    if (errorsEl) {
      errorsEl.textContent = String(stats.errors);
    }

    const list = document.getElementById('stat-top-tools');
    if (!list) {
      return;
    }

    const topTools = Object.entries(stats.toolCounts)
      .sort((a, b) => b[1] - a[1])
      .slice(0, 8);

    if (topTools.length === 0) {
      list.innerHTML = '<li style="color:var(--text-dim);font-size:0.8rem">No data yet</li>';
      return;
    }

    list.innerHTML = topTools.map(([name, count]) => `
      <li>
        <span class="stat-list-name">${escapeHTML(name)}</span>
        <span class="stat-list-count">${count}</span>
      </li>
    `).join('');
  }

  async function renderDashboard() {
    dashboardState = {
      summary: null,
      timeseries: null,
      window: '1h',
      recentEvents: [],
      recentEventIDs: new Set(),
      toolCounts: {},
    };

    app.innerHTML = `
      <div class="page-header">
        <h2>Dashboard <span class="live-indicator"><span class="live-dot"></span>Live</span></h2>
      </div>
      <div class="dashboard-summary">
        <div class="summary-card" style="--card-accent:var(--accent)">
          <div class="summary-card-label"><span class="summary-card-icon">◉</span>Active Sessions</div>
          <div class="summary-card-value" id="dash-active">-</div>
          <div class="summary-card-sub" id="dash-active-sub">&nbsp;</div>
        </div>
        <div class="summary-card" style="--card-accent:var(--success)">
          <div class="summary-card-label"><span class="summary-card-icon">▶</span>Runs Today</div>
          <div class="summary-card-value" id="dash-runs">-</div>
          <div class="summary-card-sub" id="dash-runs-sub">&nbsp;</div>
        </div>
        <div class="summary-card" style="--card-accent:var(--purple)">
          <div class="summary-card-label"><span class="summary-card-icon">⚡</span>Tool Calls</div>
          <div class="summary-card-value" id="dash-tools">-</div>
          <div class="summary-card-sub" id="dash-tools-sub">&nbsp;</div>
        </div>
        <div class="summary-card" style="--card-accent:var(--error)">
          <div class="summary-card-label"><span class="summary-card-icon">⚠</span>Errors</div>
          <div class="summary-card-value" id="dash-errors">-</div>
          <div class="summary-card-sub" id="dash-errors-sub">&nbsp;</div>
        </div>
      </div>
      <div class="section-title" style="margin-bottom:0.75rem">Infrastructure</div>
      <div class="vm-strip" id="dash-vm-strip" style="margin-bottom:1.5rem"></div>
      <div class="charts-row">
        <div class="chart-panel">
          <div class="chart-header">
            <span class="chart-title">Event Rate</span>
            <div style="display:flex;align-items:center;gap:1.25rem">
              <div class="chart-legend">
                <span class="chart-legend-item"><span class="chart-legend-dot" style="background:#34d399"></span>runs</span>
                <span class="chart-legend-item"><span class="chart-legend-dot" style="background:#22d3ee"></span>tools</span>
                <span class="chart-legend-item"><span class="chart-legend-dot" style="background:#f87171"></span>errors</span>
              </div>
              <div class="window-selector">
                <button class="window-btn active" data-w="1h">1h</button>
                <button class="window-btn" data-w="6h">6h</button>
                <button class="window-btn" data-w="24h">24h</button>
                <button class="window-btn" data-w="7d">7d</button>
              </div>
            </div>
          </div>
          <div class="chart-container" id="dash-chart"></div>
        </div>
        <div class="chart-panel">
          <div class="chart-header">
            <span class="chart-title">By Framework</span>
          </div>
          <div class="fw-bars" id="dash-fw-bars">
            <p class="empty-state" style="padding:1rem">Loading...</p>
          </div>
        </div>
      </div>
      <div class="bottom-panels">
        <div class="feed-panel">
          <div class="chart-header">
            <span class="chart-title">Recent Activity</span>
          </div>
          <div class="timeline" id="dash-feed">
            <p class="empty-state" style="padding:1rem">Loading...</p>
          </div>
        </div>
        <div class="tools-panel">
          <div class="chart-header">
            <span class="chart-title">Top Tools</span>
          </div>
          <ul class="stat-list" id="dash-top-tools">
            <li style="color:var(--text-dim);font-size:0.8rem">Loading...</li>
          </ul>
        </div>
      </div>
    `;

    document.querySelectorAll('.window-btn').forEach(btn => {
      btn.addEventListener('click', () => {
        document.querySelectorAll('.window-btn').forEach(b => b.classList.remove('active'));
        btn.classList.add('active');
        dashboardState.window = btn.dataset.w;
        loadTimeseries();
      });
    });

    renderDashVMStrip();

    try {
      const [summaryData, tsData, recentData, snapshots] = await Promise.all([
        api('/v1/stats/summary'),
        api('/v1/stats/timeseries?window=1h'),
        api('/v1/events?limit=20'),
        api('/v1/events?event_type=openclaw.snapshot&limit=100').catch(() => ({ events: [] })),
      ]);

      if (!isCurrentPath('/')) return;

      mergeOpenClawEvents(snapshots.events || []);
      renderDashVMStrip();

      dashboardState.summary = summaryData;
      dashboardState.timeseries = tsData;
      renderSummaryCards();
      renderTimeseriesChart();
      renderFrameworkBars();

      const events = (recentData.events || []).slice().reverse();
      for (const evt of events) {
        const id = getRecordID(evt);
        if (id && !dashboardState.recentEventIDs.has(id)) {
          dashboardState.recentEventIDs.add(id);
          dashboardState.recentEvents.push(evt);
          tallyTool(evt);
        }
      }
      renderDashFeed();
      renderDashTopTools();
    } catch (e) {
      console.error('Dashboard load error:', e);
    }

    dashboardUnsubscribe = subscribeWS(handleDashboardWS);
  }

  function renderDashVMStrip() {
    const strip = document.getElementById('dash-vm-strip');
    if (!strip) return;
    const vms = getVMStatus();
    strip.innerHTML = vms.map(vm => `
      <div class="vm-pill ${vm.active ? 'active' : 'inactive'}">
        <span class="vm-pill-dot"></span>
        <span class="vm-pill-name">${escapeHTML(vm.name)}</span>
        <span class="vm-pill-label">${vm.active ? 'online' : 'offline'}</span>
      </div>
    `).join('');
  }

  function handleDashboardWS(msg) {
    if (msg.type !== 'message') return;

    const eventType = getEnvelopeType(msg.data);

    if (eventType === 'openclaw.snapshot') {
      mergeOpenClawEvents([msg.data]);
      renderDashVMStrip();
      return;
    }

    if (dashboardState.summary) {
      if (eventType === 'session.start') dashboardState.summary.active_sessions++;
      if (eventType === 'session.end') dashboardState.summary.active_sessions = Math.max(0, dashboardState.summary.active_sessions - 1);
      if (eventType === 'run.start') dashboardState.summary.runs_today++;
      if (eventType === 'error') dashboardState.summary.errors_today++;
      if (eventType === 'span.end') {
        const attrs = getEnvelopeAttributes(msg.data);
        if (attrs.span_kind === 'tool') dashboardState.summary.tool_calls_today++;
      }
      renderSummaryCards();
    }

    const id = getRecordID(msg.data);
    if (id && !dashboardState.recentEventIDs.has(id)) {
      dashboardState.recentEventIDs.add(id);
      dashboardState.recentEvents.push(msg.data);
      tallyTool(msg.data);

      while (dashboardState.recentEvents.length > 50) {
        const removed = dashboardState.recentEvents.shift();
        dashboardState.recentEventIDs.delete(getRecordID(removed));
      }

      renderDashFeed();
      renderDashTopTools();
    }

    if (dashboardState.timeseries && dashboardState.window === '1h') {
      appendToCurrentBucket(msg.data);
    }
  }

  function tallyTool(evt) {
    const eventType = getEnvelopeType(evt);
    if (eventType === 'span.end') {
      const attrs = getEnvelopeAttributes(evt);
      if (attrs.span_kind === 'tool') {
        const name = attrs.name || 'unknown';
        dashboardState.toolCounts[name] = (dashboardState.toolCounts[name] || 0) + 1;
      }
    }
  }

  function renderSummaryCards() {
    const s = dashboardState.summary;
    if (!s) return;

    const el = (id, val) => {
      const e = document.getElementById(id);
      if (e) e.textContent = String(val);
    };

    el('dash-active', s.active_sessions);
    el('dash-runs', s.runs_today);
    el('dash-tools', s.tool_calls_today);
    el('dash-errors', s.errors_today);

    // Sub-line: framework breakdown for active sessions
    const fws = Object.keys(s.by_framework || {});
    if (fws.length > 0) {
      const sub = document.getElementById('dash-active-sub');
      if (sub) sub.textContent = fws.map(f => `${f} ${(s.by_framework[f].runs || 0)}`).join(' · ');
    }

    const errEl = document.getElementById('dash-errors');
    if (errEl) {
      errEl.classList.toggle('has-errors', s.errors_today > 0);
    }
  }

  async function loadTimeseries() {
    try {
      // Destroy chart so it's recreated with new window scale
      if (dashboardChart) {
        dashboardChart.destroy();
        dashboardChart = null;
      }
      const data = await api('/v1/stats/timeseries?window=' + dashboardState.window);
      if (!isCurrentPath('/')) return;
      dashboardState.timeseries = data;
      renderTimeseriesChart();
    } catch (e) {
      console.error('Failed to load timeseries:', e);
    }
  }

  function buildChartData() {
    const ts = dashboardState.timeseries;
    if (!ts || !ts.series || ts.series.length === 0) return null;
    // Stacked: errors on bottom, then tools, then runs on top
    const errors = ts.series.map(b => b.errors);
    const tools = ts.series.map((b, i) => b.tools + errors[i]);
    const runs = ts.series.map((b, i) => b.runs + tools[i]);
    return [
      ts.series.map(b => Math.floor(new Date(b.ts).getTime() / 1000)),
      runs,
      tools,
      errors,
    ];
  }

  function renderTimeseriesChart() {
    const container = document.getElementById('dash-chart');
    if (!container || !dashboardState.timeseries) return;

    const data = buildChartData();
    if (!data) {
      container.innerHTML = '<p class="empty-state" style="padding:2rem">No data for this window</p>';
      return;
    }

    // If chart already exists, just update the data
    if (dashboardChart) {
      dashboardChart.setData(data);
      return;
    }

    container.innerHTML = '';

    const width = container.clientWidth || 600;
    const height = 200;

    const opts = {
      width,
      height,
      cursor: { show: true },
      scales: {
        x: { time: true },
        y: { auto: true, min: 0 },
      },
      axes: [
        {
          stroke: '#4e6070',
          grid: { stroke: 'rgba(28, 38, 55, 0.6)', width: 1 },
          ticks: { stroke: 'rgba(28, 38, 55, 0.6)', width: 1 },
          font: '11px Fira Code',
        },
        {
          stroke: '#4e6070',
          grid: { stroke: 'rgba(28, 38, 55, 0.6)', width: 1 },
          ticks: { stroke: 'rgba(28, 38, 55, 0.6)', width: 1 },
          font: '11px Fira Code',
          size: 50,
        },
      ],
      series: [
        {},
        {
          label: 'Runs',
          stroke: '#34d399',
          width: 1.5,
          fill: 'rgba(52, 211, 153, 0.15)',
        },
        {
          label: 'Tools',
          stroke: '#22d3ee',
          width: 1.5,
          fill: 'rgba(34, 211, 238, 0.15)',
        },
        {
          label: 'Errors',
          stroke: '#f87171',
          width: 1.5,
          fill: 'rgba(248, 113, 113, 0.2)',
        },
      ],
      bands: [
        { series: [1, 2], fill: 'rgba(52, 211, 153, 0.15)' },
        { series: [2, 3], fill: 'rgba(34, 211, 238, 0.15)' },
      ],
    };

    dashboardChart = new uPlot(opts, data, container);

    if (dashboardResizeObserver) {
      dashboardResizeObserver.disconnect();
    }
    dashboardResizeObserver = new ResizeObserver(entries => {
      for (const entry of entries) {
        if (dashboardChart) {
          dashboardChart.setSize({ width: entry.contentRect.width, height: 200 });
        }
      }
    });
    dashboardResizeObserver.observe(container);
  }

  function appendToCurrentBucket(evt) {
    const ts = dashboardState.timeseries;
    if (!ts || !ts.series || ts.series.length === 0) return;

    const now = Math.floor(Date.now() / 60000) * 60000;
    const last = ts.series[ts.series.length - 1];
    const lastTs = new Date(last.ts).getTime();

    let bucket;
    if (Math.abs(now - lastTs) < 60000) {
      bucket = last;
    } else {
      bucket = { ts: new Date(now).toISOString(), runs: 0, tools: 0, errors: 0 };
      ts.series.push(bucket);
    }

    const eventType = getEnvelopeType(evt);
    if (eventType === 'run.start') bucket.runs++;
    if (eventType === 'error') bucket.errors++;
    if (eventType === 'span.end') {
      const attrs = getEnvelopeAttributes(evt);
      if (attrs.span_kind === 'tool') bucket.tools++;
    }

    renderTimeseriesChart();
  }

  function renderFrameworkBars() {
    const container = document.getElementById('dash-fw-bars');
    if (!container || !dashboardState.summary) return;

    const byFw = dashboardState.summary.by_framework || {};
    const entries = Object.entries(byFw).sort((a, b) => {
      const totalA = a[1].runs + a[1].tools + a[1].errors;
      const totalB = b[1].runs + b[1].tools + b[1].errors;
      return totalB - totalA;
    });

    if (entries.length === 0) {
      container.innerHTML = '<p class="empty-state" style="padding:1rem">No framework data</p>';
      return;
    }

    const maxTotal = Math.max(...entries.map(([, s]) => s.runs + s.tools + s.errors));

    container.innerHTML = entries.map(([name, stats]) => {
      const total = stats.runs + stats.tools + stats.errors;
      const pct = maxTotal > 0 ? (total / maxTotal * 100) : 0;
      const cssClass = name.toLowerCase().replace(/[^a-z0-9-]/g, '-');
      return `
        <div class="fw-bar-row">
          <div class="fw-bar-label">
            <span class="fw-bar-name">${escapeHTML(name)}</span>
            <span class="fw-bar-count">${total} events</span>
          </div>
          <div class="fw-bar-track">
            <div class="fw-bar-fill ${escapeHTML(cssClass)}" style="width:${pct}%"></div>
          </div>
        </div>
      `;
    }).join('');
  }

  function renderDashFeed() {
    const feed = document.getElementById('dash-feed');
    if (!feed) return;

    const recent = dashboardState.recentEvents.slice(-20).reverse();
    if (recent.length === 0) {
      feed.innerHTML = '<p class="empty-state" style="padding:1rem">Waiting for events...</p>';
      return;
    }

    feed.innerHTML = recent.map(evt => {
      const eventType = getEnvelopeType(evt);
      const vmName = getVMName(evt);
      const vmClass = getVMClassName(vmName);
      const source = getEnvelopeSource(evt);
      const framework = source.framework || '';
      const tag = framework
        ? `<span class="timeline-vm-tag ${vmClass}">${escapeHTML(framework)}</span>`
        : '';

      return `
        <div class="timeline-event">
          <div class="timeline-event-header">
            ${getEventIcon(eventType)}
            ${tag}
            <span class="timeline-event-type">${escapeHTML(getEventLabel(eventType))}</span>
            <span class="timeline-event-time">${escapeHTML(new Date(getEnvelopeTS(evt)).toLocaleTimeString())}</span>
          </div>
          ${getEventBody(evt)}
        </div>
      `;
    }).join('');
  }

  function renderDashTopTools() {
    const list = document.getElementById('dash-top-tools');
    if (!list) return;

    const topTools = Object.entries(dashboardState.toolCounts)
      .sort((a, b) => b[1] - a[1])
      .slice(0, 10);

    if (topTools.length === 0) {
      list.innerHTML = '<li style="color:var(--text-dim);font-size:0.8rem">No tool data yet</li>';
      return;
    }

    const maxCount = topTools[0]?.[1] || 1;
    list.innerHTML = topTools.map(([name, count]) => {
      const pct = (count / maxCount * 100).toFixed(1);
      return `
        <li>
          <div class="stat-list-header">
            <span class="stat-list-name">${escapeHTML(name)}</span>
            <span class="stat-list-count">${count}</span>
          </div>
          <div class="stat-list-bar-track">
            <div class="stat-list-bar-fill" style="width:${pct}%"></div>
          </div>
        </li>
      `;
    }).join('');
  }

  route();
})();