'use strict';

// ── WebSocket ────────────────────────────────────────────────────────────────

let ws;
let wsReconnectTimer;

function connectWS() {
  const proto = location.protocol === 'https:' ? 'wss:' : 'ws:';
  ws = new WebSocket(`${proto}//${location.host}`);

  ws.addEventListener('open', () => {
    setWsStatus('CONNECTÉ', 'ok');
    updateInfoWS('CONNECTÉ');
    if (wsReconnectTimer) { clearTimeout(wsReconnectTimer); wsReconnectTimer = null; }
  });

  ws.addEventListener('message', evt => {
    let msg;
    try { msg = JSON.parse(evt.data); } catch { return; }

    if (msg.type === 'alert') {
      showAlert(msg.message, msg.html, msg.image);
    } else if (msg.type === 'dismiss') {
      hideAlert();
    }
  });

  ws.addEventListener('close', () => {
    setWsStatus('DÉCONNECTÉ', 'err');
    updateInfoWS('DÉCONNECTÉ');
    wsReconnectTimer = setTimeout(connectWS, 3000);
  });

  ws.addEventListener('error', () => {
    ws.close();
  });
}

function setWsStatus(text, cls) {
  const el = document.getElementById('ws-status');
  el.textContent = text;
  el.className = 'widget-status ' + (cls || '');
}

function updateInfoWS(text) {
  document.getElementById('info-ws').textContent = text;
}

// ── Alert overlay ────────────────────────────────────────────────────────────

const overlay = document.getElementById('alert-overlay');
const alertMessageEl = document.getElementById('alert-message');
const alertHtmlEl = document.getElementById('alert-html');
const alertIconEl = document.getElementById('alert-icon');
const alertImageEl = document.getElementById('alert-image');
const infoAlert = document.getElementById('info-alert');

// ── Alarm sound ───────────────────────────────────────────────────────────────

const alarmAudio = new Audio('/alert.mp3');

function playAlertSound() {
  alarmAudio.currentTime = 0;
  alarmAudio.play().catch(err => console.error('Audio play failed:', err));
}

function stopAlertSound() {
  alarmAudio.pause();
  alarmAudio.currentTime = 0;
}

// ── Alert overlay ─────────────────────────────────────────────────────────────

let autoDismissTimer = null;

function showAlert(message, html, image) {
  // Image
  if (image && image.trim()) {
    alertImageEl.innerHTML = `<img src="${escapeAttr(image)}" alt="">`;
    alertIconEl.style.display = 'none';
  } else {
    alertImageEl.innerHTML = '';
    alertIconEl.style.display = '';
  }

  // Text / HTML
  alertMessageEl.textContent = message || '';
  alertMessageEl.style.display = (message && !image) ? '' : (message ? '' : 'none');
  alertHtmlEl.innerHTML = (html && html.trim()) ? html : '';

  // Show overlay
  overlay.classList.remove('hidden');
  overlay.style.animation = 'none';
  void overlay.offsetWidth;
  overlay.style.animation = '';

  infoAlert.textContent = 'ACTIVE';
  infoAlert.style.color = 'var(--red)';

  playAlertSound();

  if (autoDismissTimer) clearTimeout(autoDismissTimer);
  autoDismissTimer = setTimeout(hideAlert, 60_000);
}

function hideAlert() {
  if (autoDismissTimer) { clearTimeout(autoDismissTimer); autoDismissTimer = null; }
  overlay.classList.add('hidden');
  stopAlertSound();
  infoAlert.textContent = 'INACTIVE';
  infoAlert.style.color = '';
}

// ── Clock ────────────────────────────────────────────────────────────────────

const clockTime = document.getElementById('clock-time');
const clockDate = document.getElementById('clock-date');
const headerClock = document.getElementById('header-clock');
const infoHost = document.getElementById('info-host');

const DAYS = ['Dimanche','Lundi','Mardi','Mercredi','Jeudi','Vendredi','Samedi'];
const MONTHS = ['Jan','Fév','Mar','Avr','Mai','Jun','Jul','Aoû','Sep','Oct','Nov','Déc'];

function pad(n) { return String(n).padStart(2, '0'); }

function updateClock() {
  const now = new Date();
  const h = pad(now.getHours());
  const m = pad(now.getMinutes());
  const s = pad(now.getSeconds());
  const timeStr = `${h}:${m}:${s}`;
  const dateStr = `${DAYS[now.getDay()]} ${pad(now.getDate())} ${MONTHS[now.getMonth()]} ${now.getFullYear()}`;

  clockTime.textContent = timeStr;
  clockDate.textContent = dateStr;
  headerClock.textContent = `${dateStr} ${timeStr}`;
}

// ── ANSSI / CERT-FR feed ─────────────────────────────────────────────────────

const anssiList = document.getElementById('anssi-list');
const anssiStatus = document.getElementById('anssi-status');

async function loadAnssi() {
  anssiStatus.textContent = '...';
  anssiStatus.className = 'widget-status';
  try {
    const resp = await fetch('/api/feeds/anssi');
    if (!resp.ok) throw new Error(`HTTP ${resp.status}`);
    const items = await resp.json();
    anssiList.innerHTML = '';

    if (!items.length) {
      anssiList.innerHTML = '<li class="feed-loading">Aucun bulletin</li>';
      return;
    }

    items.forEach(item => {
      const li = document.createElement('li');
      li.className = 'anssi-item';

      const date = item.pubDate
        ? new Date(item.pubDate).toLocaleDateString('fr-FR', { day: '2-digit', month: 'short', year: 'numeric' })
        : '';

      li.innerHTML = `
        <a href="${escapeAttr(item.link)}" target="_blank" rel="noopener noreferrer">${escapeHtml(item.title)}</a>
        ${date ? `<span class="anssi-date">${escapeHtml(date)}</span>` : ''}
      `;
      anssiList.appendChild(li);
    });

    anssiStatus.textContent = `${items.length} bulletins`;
    anssiStatus.className = 'widget-status ok';
  } catch (err) {
    anssiStatus.textContent = 'ERREUR';
    anssiStatus.className = 'widget-status err';
    anssiList.innerHTML = `<li class="feed-loading">Erreur : ${escapeHtml(err.message)}</li>`;
  }
}

// ── CVE feed ──────────────────────────────────────────────────────────────────

const cveList = document.getElementById('cve-list');
const cveStatus = document.getElementById('cve-status');

function severityClass(cvss) {
  if (cvss === undefined || cvss === null) return 'unknown';
  const score = parseFloat(cvss);
  if (isNaN(score)) return 'unknown';
  if (score >= 9.0) return 'critical';
  if (score >= 7.0) return 'high';
  if (score >= 4.0) return 'medium';
  return 'low';
}

function severityLabel(cvss) {
  const cls = severityClass(cvss);
  const map = { critical: 'CRITIQUE', high: 'ÉLEVÉ', medium: 'MOYEN', low: 'FAIBLE', unknown: '???' };
  return map[cls];
}

async function loadCve() {
  cveStatus.textContent = '...';
  cveStatus.className = 'widget-status';
  try {
    const resp = await fetch('/api/feeds/cve');
    if (!resp.ok) throw new Error(`HTTP ${resp.status}`);
    const items = await resp.json();
    cveList.innerHTML = '';

    if (!items.length) {
      cveList.innerHTML = '<li class="feed-loading">Aucune CVE</li>';
      return;
    }

    items.forEach(item => {
      const cvss = item.cvss ?? item['cvss-score'] ?? null;
      const cls = severityClass(cvss);
      const label = severityLabel(cvss);
      const desc = item.summary || item.description || '';
      const cveId = item.id || item['cve-id'] || 'CVE-????-????';

      const li = document.createElement('li');
      li.className = 'cve-item';
      li.innerHTML = `
        <span class="cve-badge badge-${cls}">${escapeHtml(label)}</span>
        <div class="cve-info">
          <div class="cve-id">${escapeHtml(cveId)}</div>
          <div class="cve-desc" title="${escapeAttr(desc)}">${escapeHtml(desc)}</div>
        </div>
      `;
      cveList.appendChild(li);
    });

    cveStatus.textContent = `${items.length} CVEs`;
    cveStatus.className = 'widget-status ok';
  } catch (err) {
    cveStatus.textContent = 'ERREUR';
    cveStatus.className = 'widget-status err';
    cveList.innerHTML = `<li class="feed-loading">Erreur : ${escapeHtml(err.message)}</li>`;
  }
}

// ── Init ─────────────────────────────────────────────────────────────────────

function init() {
  infoHost.textContent = location.host;

  connectWS();
  updateClock();
  setInterval(updateClock, 1000);

  loadAnssi();
  loadCve();
  setInterval(loadAnssi, 5 * 60 * 1000);
  setInterval(loadCve,   5 * 60 * 1000);
}

// ── Helpers ───────────────────────────────────────────────────────────────────

function escapeHtml(str) {
  return String(str)
    .replace(/&/g, '&amp;')
    .replace(/</g, '&lt;')
    .replace(/>/g, '&gt;')
    .replace(/"/g, '&quot;');
}

function escapeAttr(str) {
  return String(str).replace(/"/g, '&quot;').replace(/'/g, '&#39;');
}

document.addEventListener('DOMContentLoaded', init);