const CACHE_NAME = 'gridtv-v2';

// Ressources statiques à mettre en cache immédiatement
const STATIC_ASSETS = [
  '/',
  '/index.php',
  '/manifest.json',
  '/assets/fonts/fonts.css',
  '/assets/icon-192.png',
  '/assets/icon-512.png',
  '/assets/vendor/hls.min.js'
];

// Install : mise en cache des assets statiques
self.addEventListener('install', e => {
  e.waitUntil(
    caches.open(CACHE_NAME)
      .then(cache => cache.addAll(STATIC_ASSETS))
      .then(() => self.skipWaiting())
  );
});

// Activate : purger les anciens caches
self.addEventListener('activate', e => {
  e.waitUntil(
    caches.keys().then(keys =>
      Promise.all(keys.filter(k => k !== CACHE_NAME).map(k => caches.delete(k)))
    ).then(() => self.clients.claim())
  );
});

// Fetch : stratégie selon le type de ressource
self.addEventListener('fetch', e => {
  const url = new URL(e.request.url);

  // Flux EPG/M3U et API GitHub : network only (pas de cache)
  if (
    url.pathname.includes('xmltv') ||
    url.pathname.includes('.m3u') ||
    url.hostname === 'api.github.com' ||
    url.pathname.includes('proxy.php')
  ) {
    return;
  }

  // Assets statiques : cache first
  if (
    e.request.destination === 'style' ||
    e.request.destination === 'script' ||
    e.request.destination === 'font' ||
    e.request.destination === 'image' ||
    url.pathname.endsWith('.json') ||
    url.pathname.endsWith('.css') ||
    url.pathname.endsWith('.js')
  ) {
    e.respondWith(
      caches.match(e.request).then(cached => cached || fetch(e.request).then(res => {
        const clone = res.clone();
        caches.open(CACHE_NAME).then(cache => cache.put(e.request, clone));
        return res;
      }))
    );
    return;
  }

  // Pages PHP (index.php) : network first, fallback cache
  e.respondWith(
    fetch(e.request)
      .then(res => {
        const clone = res.clone();
        caches.open(CACHE_NAME).then(cache => cache.put(e.request, clone));
        return res;
      })
      .catch(() => caches.match(e.request))
  );
});