// Copyright (c) 2026 Gordon Bolton. MIT License.

import { state, STATUS_REFRESH_MS } from '../state.js';
import { refreshStatusPanel as apiRefreshStatusPanel } from '../api.js';
import { fetchWebhookStatus } from './webhooks.js';

export async function toggleStatusPanel() {
  const panel = document.getElementById('status-panel');
  const webhooksSection = document.getElementById('webhooks-section');
  if (!panel.classList.contains('hidden')) {
    // Close both panels (webhooks is a sibling, hide it too)
    panel.classList.add('hidden');
    if (webhooksSection) webhooksSection.classList.add('hidden');
    if (state.statusRefreshHandle) { clearInterval(state.statusRefreshHandle); state.statusRefreshHandle = null; }
    return;
  }
  // Open status panel and webhooks section (siblings)
  panel.classList.remove('hidden');
  // Show webhooks section for admin users (collapsed by default)
  if (webhooksSection && state.isAdmin) {
    webhooksSection.classList.remove('hidden');
    state.webhookSectionExpanded = false;
    document.getElementById('webhooks-content').classList.add('hidden');
    document.getElementById('webhooks-toggle').classList.remove('expanded');
    await fetchWebhookStatus();
  } else if (webhooksSection) {
    webhooksSection.classList.add('hidden');
  }
  refreshStatusPanel();
  if (state.statusRefreshHandle) clearInterval(state.statusRefreshHandle);
  state.statusRefreshHandle = setInterval(refreshStatusPanel, STATUS_REFRESH_MS);
}

export function closeStatusPanel() {
  document.getElementById('status-panel').classList.add('hidden');
  const webhooksSection = document.getElementById('webhooks-section');
  if (webhooksSection) webhooksSection.classList.add('hidden');
  if (state.statusRefreshHandle) { clearInterval(state.statusRefreshHandle); state.statusRefreshHandle = null; }
}

export async function refreshStatusPanel() {
  const panel = document.getElementById('status-panel');
  const contentDiv = document.getElementById('status-content');
  console.log('[Status] panel found:', !!panel, 'contentDiv found:', !!contentDiv, 'panel display:', panel?.style?.display);
  if (!panel || panel.classList.contains('hidden')) return;
  console.log('[Status] Refreshing status panel...');
  try {
    const result = await apiRefreshStatusPanel();
    if (result.success) {
      console.log('[Status] Got status data, rendering...');
      renderStatusPanel(result.data, panel);
    } else {
      console.error('[Status] API returned error:', result.error);
      if (contentDiv && (!contentDiv.innerHTML || contentDiv.innerHTML.includes('status-loading'))) {
        contentDiv.innerHTML = '<p class="status-error">Failed to load status: ' + result.error + '</p>';
      }
    }
  } catch (err) {
    console.error('[Status] Error fetching status:', err);
    // Don't overwrite panel on transient error during auto-refresh
    if (contentDiv && (!contentDiv.innerHTML || contentDiv.innerHTML.includes('status-loading'))) {
      contentDiv.innerHTML = '<p class="status-error">Failed to load status: ' + err.message + '</p>';
    }
  }
}

export function renderStatusPanel(data, panel) {
  console.log('[Status] renderStatusPanel called with data:', data ? 'yes' : 'no', 'keys:', data ? Object.keys(data) : 'none');
  const s = data.server;
  const hrs = Math.floor(s.uptimeSeconds / 3600);
  const mins = Math.floor((s.uptimeSeconds % 3600) / 60);
  const secs = s.uptimeSeconds % 60;
  const uptime = `${hrs}h ${mins}m ${secs}s`;

  const totalKB = (data.cache.totalSizeBytes / 1024).toFixed(1);

  let html = `
    <div class="status-header">
      <h3>Server Status</h3>
      <button class="status-close" id="status-close-btn">&times;</button>
    </div>
    <div class="status-grid">
      <div class="status-card">
        <div class="status-card-title">Server</div>
        <div class="status-row"><span>Uptime</span><span>${uptime}</span></div>
        <div class="status-row"><span>Node</span><span>${escapeHtml(s.nodeVersion)}</span></div>
        <div class="status-row"><span>Memory (RSS)</span><span>${s.memoryUsageMB} MB</span></div>
        <div class="status-row"><span>Heap</span><span>${s.heapUsedMB} / ${s.heapTotalMB} MB</span></div>
      </div>
      <div class="status-card">
        <div class="status-card-title">Data Refresh</div>`;

  const pollIntervalMs = data.polling.intervalMs;
  const clients = data.clients || [];
  const sseClients = clients.filter(c => c.type === 'sse');

  if (data.polling.enabled) {
    html += `<div class="status-row"><span>Background poll</span><span>${pollIntervalMs / 1000}s</span></div>`;
  } else {
    html += `<div class="status-row"><span>Background poll</span><span>Disabled</span></div>`;
  }

  const mode = sseClients.length > 0
    ? `<span class="status-fg-badge">SSE push</span>`
    : (data.polling.enabled ? 'Background' : 'On-demand (idle)');
  html += `<div class="status-row"><span>Delivery mode</span><span>${mode}</span></div>`;

  html += `<div class="status-row"><span>SSE clients</span><span>${sseClients.length}</span></div>`;
  for (const c of sseClients) {
    const age = Math.round((Date.now() - c.connectedAt) / 1000);
    html += `<div class="status-row status-row-sub"><span>${escapeHtml(c.user)}</span><span>connected ${age}s ago</span></div>`;
  }

  html += `</div>`;

  // Webhook metrics card (admin only)
  if (state.isAdmin && data.webhooks) {
    const wh = data.webhooks;
    const sonarrEnabled = wh.sonarr?.enabled ? '●' : '○';
    const radarrEnabled = wh.radarr?.enabled ? '●' : '○';
    const sonarrEvents = wh.sonarr?.eventsReceived || 0;
    const radarrEvents = wh.radarr?.eventsReceived || 0;
    const sonarrPolls = wh.sonarr?.pollsSkipped || 0;
    const radarrPolls = wh.radarr?.pollsSkipped || 0;

    html += `
      <div class="status-card">
        <div class="status-card-title">Webhooks</div>
        <div class="status-row"><span>Sonarr</span><span>${sonarrEnabled} ${wh.sonarr?.enabled ? 'Enabled' : 'Disabled'}</span></div>
        <div class="status-row"><span>Radarr</span><span>${radarrEnabled} ${wh.radarr?.enabled ? 'Enabled' : 'Disabled'}</span></div>
        <div class="status-row status-row-sub"><span>Events</span><span>S:${sonarrEvents} R:${radarrEvents}</span></div>
        <div class="status-row status-row-sub"><span>Polls skipped</span><span>S:${sonarrPolls} R:${radarrPolls}</span></div>
      </div>`;
  }

  // Poll timings card
  const lp = data.polling.lastPoll;
  if (lp) {
    const pollAge = Math.round((Date.now() - new Date(lp.timestamp).getTime()) / 1000);
    html += `
      <div class="status-card status-card-wide">
        <div class="status-card-title">Last Poll (${lp.totalMs}ms total, ${pollAge}s ago)</div>
        <div class="status-timings">`;
    const maxTaskMs = lp.tasks.reduce((max, t) => Math.max(max, t.ms), 1);
    for (const t of lp.tasks) {
      const barWidth = Math.max(2, (t.ms / maxTaskMs) * 100);
      html += `
          <div class="timing-row">
            <span class="timing-label">${escapeHtml(t.label)}</span>
            <div class="timing-bar-bg"><div class="timing-bar" data-w="${barWidth.toFixed(1)}"></div></div>
            <span class="timing-value">${t.ms}ms</span>
          </div>`;
    }
    html += `</div></div>`;
  }

  // Cache table
  html += `
      <div class="status-card status-card-wide">
        <div class="status-card-title">Cache (${data.cache.entryCount} entries, ${totalKB} KB)</div>
        <table class="status-table">
          <thead><tr><th>Key</th><th>Items</th><th>Size</th><th>TTL</th></tr></thead>
          <tbody>`;

  for (const e of data.cache.entries) {
    const sizeStr = e.sizeBytes > 1024 ? (e.sizeBytes / 1024).toFixed(1) + ' KB' : e.sizeBytes + ' B';
    const ttlStr = e.expired ? '<span class="status-expired">expired</span>' : (e.ttlRemainingMs / 1000).toFixed(0) + 's';
    const items = e.itemCount !== null ? e.itemCount : '—';
    html += `<tr><td><code>${escapeHtml(e.key)}</code></td><td>${items}</td><td>${sizeStr}</td><td>${ttlStr}</td></tr>`;
  }

  html += `</tbody></table></div></div>`;
  // Render into status-content div, not the whole panel (preserves webhooks section)
  const contentDiv = document.getElementById('status-content');
  const panelCheck = document.getElementById('status-panel');
  console.log('[Status] contentDiv found:', !!contentDiv, 'panel children:', panelCheck?.children?.length, 'HTML length:', html.length);
  if (panelCheck) {
    console.log('[Status] panel innerHTML preview:', panelCheck.innerHTML.substring(0, 200));
  }
  if (contentDiv) {
    contentDiv.innerHTML = html;
    console.log('[Status] HTML rendered, contentDiv innerHTML length:', contentDiv.innerHTML.length);
  } else {
    console.error('[Status] contentDiv not found!');
  }
  // Wire close button — addEventListener avoids CSP inline handler restrictions
  const closeBtn = document.getElementById('status-close-btn');
  if (closeBtn) closeBtn.addEventListener('click', closeStatusPanel);
  // Set bar widths via JS DOM assignment — immune to CSP style-src restrictions
  panel.querySelectorAll('.timing-bar[data-w]').forEach(el => {
    el.style.width = el.dataset.w + '%';
  });
}

function escapeHtml(str) {
  const div = document.createElement('div');
  div.textContent = str;
  return div.innerHTML;
}