'use strict';

// ── Auto-redirect on auth timeout ─────────────────────────────────────
// Wraps fetch so a 401 (Authelia session expired) forces a full reload.
// lt.api uses fetch internally, so this covers all API calls too.
(function () {
  const _fetch = window.fetch;
  window.fetch = async function (...args) {
    const resp = await _fetch(...args);
    if (resp.status === 401) {
      window.location.reload();
      throw new Error('Session expired — reloading');
    }
    return resp;
  };
})();

// ── Toast notifications — thin wrapper over lt.toast ──────────────────
function showToast(msg, type = 'success') {
  if (type === 'error')   return lt.toast.error(msg);
  if (type === 'warning') return lt.toast.warning(msg);
  if (type === 'info')    return lt.toast.info(msg);
  return lt.toast.success(msg);
}

// ── Normalise UTC timestamp string for Date() parsing ─────────────────
// Server returns "2026-03-14 14:14:21 UTC"; Date() needs ISO 8601.
function _toIso(s) {
  if (!s) return s;
  return s.replace(' UTC', 'Z').replace(' ', 'T');
}

// ── Dashboard auto-refresh ────────────────────────────────────────────
async function refreshAll() {
  const refreshBtn = document.querySelector('[data-action="refresh"]');
  if (refreshBtn) refreshBtn.classList.add('is-loading');
  try {
    const [netResult, statusResult] = await Promise.allSettled([
      lt.api.get('/api/network'),
      lt.api.get('/api/status'),
    ]);
    if (netResult.status === 'fulfilled') {
      const net = netResult.value;
      updateHostGrid(net.hosts || {});
      updateUnifiTable(net.unifi || []);
      updateTopology(net.hosts || {});
    } else {
      showToast('Network data unavailable', 'warning');
    }
    if (statusResult.status === 'fulfilled') {
      const status = statusResult.value;
      updateEventsTable(status.events || [], status.total_active);
      updateStatusBar(status.summary || {}, status.last_check || '', status.daemon_ok);
    } else {
      showToast('Status data unavailable', 'warning');
    }
  } finally {
    if (refreshBtn) refreshBtn.classList.remove('is-loading');
  }
}

function updateStatusBar(summary, lastCheck, daemonOk) {
  const bar = document.querySelector('.status-chips');
  if (!bar) return;
  const chips = [];
  if (daemonOk === false) chips.push('<span class="chip chip-critical">⚠ MONITOR OFFLINE</span>');
  if (summary.critical) chips.push(`<span class="chip chip-critical">● ${summary.critical} CRITICAL</span>`);
  if (summary.warning)  chips.push(`<span class="chip chip-warning">● ${summary.warning} WARNING</span>`);
  if (!summary.critical && !summary.warning && daemonOk !== false) chips.push('<span class="chip chip-ok">✔ ALL SYSTEMS NOMINAL</span>');
  bar.innerHTML = chips.join('');

  const lc = document.getElementById('last-check');
  if (lc && lastCheck) lc.textContent = lastCheck;

  const critCount = summary.critical || 0;
  const warnCount = summary.warning || 0;
  if (critCount)      document.title = `(${critCount} CRIT) GANDALF`;
  else if (warnCount) document.title = `(${warnCount} WARN) GANDALF`;
  else                document.title = 'GANDALF';

  // Stale data banner: warn if last_check is older than 15 minutes
  let staleBanner = document.getElementById('stale-banner');
  if (lastCheck) {
    const checkAge = (Date.now() - new Date(_toIso(lastCheck))) / 1000;
    if (checkAge > 900) {
      if (!staleBanner) {
        staleBanner = document.createElement('div');
        staleBanner.id = 'stale-banner';
        staleBanner.className = 'stale-banner';
        document.querySelector('.lt-main').prepend(staleBanner);
      }
      const mins = Math.floor(checkAge / 60);
      staleBanner.textContent = `⚠ Monitoring data is stale — last check was ${mins} minute${mins !== 1 ? 's' : ''} ago. The monitor daemon may be down.`;
      staleBanner.style.display = '';
    } else if (staleBanner) {
      staleBanner.style.display = 'none';
    }
  }
}

function updateHostGrid(hosts) {
  for (const [name, host] of Object.entries(hosts)) {
    const card = document.querySelector(`.host-card[data-host="${CSS.escape(name)}"]`);
    if (!card) continue;

    card.className = card.className.replace(/host-card-(up|down|degraded|unknown)/g, '');
    card.classList.add(`host-card-${host.status}`);

    const dot = card.querySelector('.host-status-dot');
    if (dot) dot.className = `host-status-dot dot-${host.status}`;

    const ifaceList = card.querySelector('.iface-list');
    if (ifaceList && host.interfaces && Object.keys(host.interfaces).length > 0) {
      ifaceList.innerHTML = Object.entries(host.interfaces)
        .sort(([a], [b]) => a.localeCompare(b))
        .map(([iface, state]) => `
          <div class="iface-row">
            <span class="iface-dot dot-${state}"></span>
            <span class="iface-name">${lt.escHtml(iface)}</span>
            <span class="iface-state state-${state}">${state}</span>
          </div>
        `).join('');
    }
  }
}

function updateTopology(hosts) {
  document.querySelectorAll('.topo-host').forEach(node => {
    const name = node.dataset.host;
    const host = hosts[name];
    if (!host) return;
    node.className = node.className.replace(/topo-v2-status-(up|down|degraded|unknown)/g, '');
    node.className = node.className.replace(/topo-status-(up|down|degraded|unknown)/g, '');
    node.classList.add(`topo-v2-status-${host.status}`);
    node.classList.add(`topo-status-${host.status}`);
    const badge = node.querySelector('.topo-badge');
    if (badge) {
      badge.className = `topo-badge topo-badge-${host.status}`;
      badge.textContent = host.status;
    }
  });
}

function updateUnifiTable(devices) {
  const tbody = document.querySelector('#unifi-table tbody');
  if (!tbody || !devices.length) return;

  tbody.innerHTML = devices.map(d => {
    const statusClass = d.connected ? '' : 'row-critical';
    const dotClass    = d.connected ? 'dot-up' : 'dot-down';
    const statusText  = d.connected ? 'Online' : 'Offline';
    const suppressBtn = !d.connected
      ? `<button class="lt-btn lt-btn-ghost lt-btn-sm btn-suppress"
            data-sup-type="unifi_device"
            data-sup-name="${lt.escHtml(d.name)}"
            data-sup-detail=""
            aria-label="Suppress alerts for ${lt.escHtml(d.name)}">🔕 Suppress</button>`
      : '';
    return `
      <tr class="${statusClass}">
        <td><span class="${dotClass}"></span> ${statusText}</td>
        <td><strong>${lt.escHtml(d.name)}</strong></td>
        <td>${lt.escHtml(d.type)}</td>
        <td>${lt.escHtml(d.model)}</td>
        <td>${lt.escHtml(d.ip)}</td>
        <td>${suppressBtn}</td>
      </tr>`;
  }).join('');
}

function updateEventsTable(events, totalActive) {
  const wrap = document.getElementById('events-table-wrap');
  if (!wrap) return;

  const active = (events || []).filter(e => e.severity !== 'info');
  if (!active.length) {
    wrap.innerHTML = '<p class="empty-state">No active alerts ✔</p>';
    return;
  }

  const truncated = totalActive != null && totalActive > active.length;
  const countNotice = truncated
    ? `<div class="pagination-notice">Showing ${active.length} of ${totalActive} active alerts &mdash; <a href="/api/events?limit=1000">view all via API</a></div>`
    : '';

  const rows = active.map(e => {
    const supType = e.event_type === 'unifi_device_offline' ? 'unifi_device'
                  : e.event_type === 'interface_down'       ? 'interface'
                  : 'host';
    const ticketBase = (typeof GANDALF_CONFIG !== 'undefined' && GANDALF_CONFIG.ticket_web_url)
      ? GANDALF_CONFIG.ticket_web_url : 'http://t.lotusguild.org/ticket/';
    const ticket = e.ticket_id
      ? `<a href="${lt.escHtml(ticketBase)}${lt.escHtml(String(e.ticket_id))}" target="_blank"
            class="ticket-link">#${e.ticket_id}</a>`
      : '–';
    return `
      <tr class="row-${e.severity}">
        <td><span class="lt-badge badge-${e.severity}">${e.severity}</span></td>
        <td>${lt.escHtml(e.event_type.replace(/_/g,' '))}</td>
        <td><strong>${lt.escHtml(e.target_name)}</strong></td>
        <td>${lt.escHtml(e.target_detail || '–')}</td>
        <td class="desc-cell" title="${lt.escHtml(e.description || '')}">${lt.escHtml((e.description||'').substring(0,60))}${(e.description||'').length>60?'…':''}</td>
        <td class="ts-cell" title="${lt.escHtml(e.first_seen||'')}">${lt.time.ago(_toIso(e.first_seen))}</td>
        <td class="ts-cell" title="${lt.escHtml(e.last_seen||'')}">${lt.time.ago(_toIso(e.last_seen))}</td>
        <td>${e.consecutive_failures}</td>
        <td>${ticket}</td>
        <td>
          <button class="lt-btn lt-btn-ghost lt-btn-sm btn-suppress"
            data-sup-type="${lt.escHtml(supType)}"
            data-sup-name="${lt.escHtml(e.target_name)}"
            data-sup-detail="${lt.escHtml(e.target_detail||'')}"
            aria-label="Suppress alert for ${lt.escHtml(e.target_name)}">🔕</button>
        </td>
      </tr>`;
  }).join('');

  wrap.innerHTML = `
    ${countNotice}
    <div class="lt-table-wrap">
      <table class="lt-table" id="events-table">
        <caption class="lt-sr-only">Active network alerts</caption>
        <thead>
          <tr>
            <th>Sev</th><th>Type</th><th>Target</th><th>Detail</th>
            <th>Description</th><th>First Seen</th><th>Last Seen</th><th>Failures</th><th>Ticket</th><th>Actions</th>
          </tr>
        </thead>
        <tbody>${rows}</tbody>
      </table>
    </div>`;
}

// ── Suppression modal ─────────────────────────────────────────────────
function openSuppressModal(type, name, detail) {
  const modal = document.getElementById('suppress-modal');
  if (!modal) return;

  document.getElementById('sup-type').value    = type;
  document.getElementById('sup-name').value    = name;
  document.getElementById('sup-detail').value  = detail;
  document.getElementById('sup-reason').value  = '';
  document.getElementById('sup-expires').value = '';

  updateSuppressForm();
  lt.modal.open('suppress-modal');

  document.querySelectorAll('#suppress-modal .pill').forEach(p => p.classList.remove('active'));
  const manualPill = document.querySelector('#suppress-modal .pill-manual');
  if (manualPill) manualPill.classList.add('active');
  const hint = document.getElementById('duration-hint');
  if (hint) hint.textContent = 'Suppression will persist until manually removed.';
}

function closeSuppressModal() {
  lt.modal.close('suppress-modal');
}

function updateSuppressForm() {
  const type      = document.getElementById('sup-type').value;
  const nameGrp   = document.getElementById('sup-name-group');
  const detailGrp = document.getElementById('sup-detail-group');
  if (nameGrp)   nameGrp.style.display   = (type === 'all') ? 'none' : '';
  if (detailGrp) detailGrp.style.display = (type === 'interface') ? '' : 'none';
}

function setDuration(mins, el) {
  document.getElementById('sup-expires').value = mins || '';
  document.querySelectorAll('#suppress-modal .pill').forEach(p => p.classList.remove('active'));
  if (el) el.classList.add('active');
  const hint = document.getElementById('duration-hint');
  if (hint) {
    if (mins) {
      const h = Math.floor(mins / 60), m = mins % 60;
      hint.textContent = `Expires in ${h ? h + 'h ' : ''}${m ? m + 'm' : ''}.`;
    } else {
      hint.textContent = 'Suppression will persist until manually removed.';
    }
  }
}

async function submitSuppress(e) {
  e.preventDefault();
  const type    = document.getElementById('sup-type').value;
  const name    = document.getElementById('sup-name').value;
  const detail  = document.getElementById('sup-detail').value;
  const reason  = document.getElementById('sup-reason').value;
  const expires = document.getElementById('sup-expires').value;

  if (!reason.trim()) { showToast('Reason is required', 'error'); return; }
  if (type !== 'all' && !name.trim()) { showToast('Target name is required', 'error'); return; }

  try {
    await lt.api.post('/api/suppressions', {
      target_type:     type,
      target_name:     name,
      target_detail:   detail,
      reason,
      expires_minutes: expires ? parseInt(expires) : null,
    });
    closeSuppressModal();
    showToast('Suppression applied ✔', 'success');
    setTimeout(refreshAll, 500);
  } catch (err) {
    showToast(err.message || 'Failed to apply suppression', 'error');
  }
}

// ── Global click delegation ───────────────────────────────────────────
document.addEventListener('click', e => {
  // Refresh button
  if (e.target.closest('[data-action="refresh"]')) {
    lt.autoRefresh.now();
    return;
  }

  // Duration pills (data-duration="" = manual/forever)
  const pill = e.target.closest('.pill[data-duration]');
  if (pill) {
    const val = pill.dataset.duration;
    setDuration(val ? parseInt(val) : null, pill);
    return;
  }

  // Suppress buttons
  const btn = e.target.closest('.btn-suppress[data-sup-type]');
  if (btn) {
    openSuppressModal(
      btn.dataset.supType   || '',
      btn.dataset.supName   || '',
      btn.dataset.supDetail || '',
    );
  }
});