const CACHE_NAME = 'kaubuntu-14092025-1128';
const STATIC_CACHE_NAME = 'kaubuntu-static-14092025-1128';
const DYNAMIC_CACHE_NAME = 'kaubuntu-dynamic-14092025-1128';

// Ressources à mettre en cache immédiatement
const STATIC_ASSETS = [
  '/',
  '/index.php',
  '/css/styles.css',
  '/css/categories.css',
  '/css/search.css',
  '/css/video-page.css',
  '/css/mastodon-timeline.min.css',
  '/js/main.js',
  '/js/categories.js',
  '/js/search.js',
  '/js/mastodon-timeline.umd.js',
  '/img/logo.png',
  '/img/android-chrome-192x192.png',
  '/img/android-chrome-512x512.png',
  '/img/apple-touch-icon.png',
  '/img/favicon-32x32.png',
  '/img/favicon-16x16.png',
  '/img/favicon.ico',
  '/img/play-icon.svg',
  '/site.webmanifest',
  'https://cdnjs.cloudflare.com/ajax/libs/font-awesome/7.0.1/css/all.min.css'
];

// Pages à mettre en cache
const PAGES_TO_CACHE = [
  '/',
  '/index.php',
  '/categories.php',
  '/recherche.php',
  '/mentions-legales.php'
];

// Installation du Service Worker
self.addEventListener('install', event => {
  console.log('Service Worker: Installation');

  event.waitUntil(
    caches.open(STATIC_CACHE_NAME)
      .then(cache => {
        console.log('Service Worker: Mise en cache des assets statiques');
        return cache.addAll(STATIC_ASSETS);
      })
      .then(() => {
        return self.skipWaiting();
      })
      .catch(err => {
        console.error('Service Worker: Erreur lors de la mise en cache:', err);
      })
  );
});

// Activation du Service Worker
self.addEventListener('activate', event => {
  console.log('Service Worker: Activation');

  event.waitUntil(
    caches.keys()
      .then(cacheNames => {
        return Promise.all(
          cacheNames.map(cacheName => {
            if (cacheName !== STATIC_CACHE_NAME && cacheName !== DYNAMIC_CACHE_NAME) {
              console.log('Service Worker: Suppression du cache obsolète:', cacheName);
              return caches.delete(cacheName);
            }
          })
        );
      })
      .then(() => {
        return self.clients.claim();
      })
  );
});

// Interception des requêtes
self.addEventListener('fetch', event => {
  const { request } = event;
  const url = new URL(request.url);

  // Ignorer les requêtes non-GET
  if (request.method !== 'GET') {
    return;
  }

  // Ignorer les requêtes vers des domaines externes (sauf CDN)
  if (url.origin !== location.origin &&
      !url.hostname.includes('cdnjs.cloudflare.com')) {
    return;
  }

  // Stratégie Cache First pour les assets statiques
  if (isStaticAsset(request.url)) {
    event.respondWith(
      caches.match(request)
        .then(response => {
          if (response) {
            return response;
          }
          return fetch(request)
            .then(response => {
              if (response.status === 200) {
                const responseClone = response.clone();
                caches.open(STATIC_CACHE_NAME)
                  .then(cache => cache.put(request, responseClone));
              }
              return response;
            });
        })
        .catch(() => {
          // Fallback pour les images
          if (request.destination === 'image') {
            return caches.match('/img/logo.png');
          }
        })
    );
    return;
  }

  // Stratégie Network First pour les pages dynamiques
  if (isPageRequest(request.url)) {
    event.respondWith(
      fetch(request)
        .then(response => {
          if (response.status === 200) {
            const responseClone = response.clone();
            caches.open(DYNAMIC_CACHE_NAME)
              .then(cache => cache.put(request, responseClone));
          }
          return response;
        })
        .catch(() => {
          return caches.match(request)
            .then(response => {
              if (response) {
                return response;
              }
              // Fallback vers la page d'accueil
              return caches.match('/') || caches.match('/index.php');
            });
        })
    );
    return;
  }

  // Stratégie Network First pour les API et AJAX
  if (isApiRequest(request.url)) {
    event.respondWith(
      fetch(request)
        .catch(() => {
          return new Response(
            JSON.stringify({
              error: 'Pas de connexion internet',
              offline: true
            }),
            {
              status: 503,
              headers: {
                'Content-Type': 'application/json'
              }
            }
          );
        })
    );
    return;
  }
});

// Fonctions utilitaires
function isStaticAsset(url) {
  return url.includes('/css/') ||
         url.includes('/js/') ||
         url.includes('/img/') ||
         url.includes('cdnjs.cloudflare.com') ||
         url.endsWith('.css') ||
         url.endsWith('.js') ||
         url.endsWith('.png') ||
         url.endsWith('.jpg') ||
         url.endsWith('.jpeg') ||
         url.endsWith('.svg') ||
         url.endsWith('.ico') ||
         url.endsWith('.webmanifest');
}

function isPageRequest(url) {
  return url.endsWith('/') ||
         url.endsWith('.php') ||
         url.includes('index.php') ||
         url.includes('categories.php') ||
         url.includes('recherche.php') ||
         url.includes('video.php') ||
         url.includes('mentions-legales.php');
}

function isApiRequest(url) {
  return url.includes('/ajax/') ||
         url.includes('api') ||
         url.includes('mastodon-config.php');
}

// Gestion des messages du client
self.addEventListener('message', event => {
  if (event.data && event.data.type === 'SKIP_WAITING') {
    self.skipWaiting();
  }
});

// Notification de mise à jour
self.addEventListener('message', event => {
  if (event.data && event.data.type === 'CHECK_UPDATE') {
    // Vérifier s'il y a une mise à jour
    event.ports[0].postMessage({
      type: 'UPDATE_AVAILABLE',
      version: CACHE_NAME
    });
  }
});