const CACHE_NAME = 'ferrovia-pwa-v2';

self.addEventListener('install', (event) => {
  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) => {
  if (event.request.method !== 'GET' || !event.request.url.startsWith(self.location.origin)) {
    return;
  }

  // Pour la navigation (HTML / pages), stratégie Network-First systématique pour toujours charger la dernière version
  const isNavigation = event.request.mode === 'navigate' || (event.request.headers.get('accept') && event.request.headers.get('accept').includes('text/html'));

  if (isNavigation) {
    event.respondWith(
      fetch(event.request)
        .then((networkResponse) => {
          if (networkResponse && networkResponse.ok) {
            const clone = networkResponse.clone();
            caches.open(CACHE_NAME).then((cache) => cache.put(event.request, clone));
          }
          return networkResponse;
        })
        .catch(() => {
          return caches.match(event.request).then((cached) => cached || caches.match('/index.html') || caches.match('./index.html'));
        })
    );
    return;
  }

  // Pour les scripts JS et CSS, Network-First pour éviter le gel des bundles
  const isCodeAsset = event.request.url.includes('/static/js/') || event.request.url.includes('/static/css/');
  if (isCodeAsset) {
    event.respondWith(
      fetch(event.request)
        .then((networkResponse) => {
          if (networkResponse && networkResponse.ok) {
            const clone = networkResponse.clone();
            caches.open(CACHE_NAME).then((cache) => cache.put(event.request, clone));
          }
          return networkResponse;
        })
        .catch(() => {
          return caches.match(event.request);
        })
    );
    return;
  }

  // Pour les autres ressources (images, favicons, polices), Cache-First avec mise en cache réseau
  event.respondWith(
    caches.match(event.request).then((cachedResponse) => {
      if (cachedResponse) {
        return cachedResponse;
      }
      return fetch(event.request).then((networkResponse) => {
        if (networkResponse && networkResponse.ok) {
          const clone = networkResponse.clone();
          caches.open(CACHE_NAME).then((cache) => cache.put(event.request, clone));
        }
        return networkResponse;
      });
    })
  );
});