const CACHE_NAME = 'ferrovia-pwa-v1';

self.addEventListener('install', (event) => {
  event.waitUntil(
    caches.open(CACHE_NAME).then((cache) => {
      return cache.addAll([
        './',
        './index.html',
        './manifest.json',
        './favicon.ico',
        './logo192.png',
        './logo512.png'
      ]);
    })
  );
  self.skipWaiting();
});

self.addEventListener('activate', (event) => {
  event.waitUntil(
    caches.keys().then((cacheNames) => {
      return Promise.all(
        cacheNames.filter((name) => name !== CACHE_NAME).map((name) => caches.delete(name))
      );
    })
  );
  self.clients.claim();
});

self.addEventListener('fetch', (event) => {
  // Ignorer les requêtes non-GET et les requêtes vers d'autres origines ou APIs
  if (event.request.method !== 'GET' || !event.request.url.startsWith(self.location.origin)) {
    return;
  }

  event.respondWith(
    caches.match(event.request).then((cachedResponse) => {
      if (cachedResponse) {
        return cachedResponse;
      }
      return fetch(event.request).then((networkResponse) => {
        return caches.open(CACHE_NAME).then((cache) => {
          cache.put(event.request, networkResponse.clone());
          return networkResponse;
        });
      }).catch(() => {
        // En cas d'échec réseau total, on pourrait retourner un fallback hors-ligne
        return caches.match('./index.html');
      });
    })
  );
});