service-worker.js

const CACHE_NAME = 'breathe-please';
const ASSETS_TO_CACHE = [
  './',
  './index.html',
  './mantra-om.mp3',
  './icon-512.png',
  './icon-192.png',
  './onebell.mp3',
  './icon-192-maskable.png',
  './favicon.ico',
  './apple-touch-icon.png'
];

// Install Event: Cache core assets immediately
self.addEventListener('install', (event) => {
  event.waitUntil(
    caches.open(CACHE_NAME).then((cache) => {
      console.log('[Service Worker] Caching core assets');
      return cache.addAll(ASSETS_TO_CACHE);
    })
  );
  self.skipWaiting();
});

// Activate Event: Clean up old caches
self.addEventListener('activate', (event) => {
  event.waitUntil(
    caches.keys().then((keyList) => {
      return Promise.all(
        keyList.map((key) => {
          if (key !== CACHE_NAME) {
            console.log('[Service Worker] Removing old cache', key);
            return caches.delete(key);
          }
        })
      );
    })
  );
  self.clients.claim();
});

// Fetch Event: Handle requests
self.addEventListener('fetch', (event) => {
  // Handle Google Fonts (cache them dynamically)
  if (event.request.url.includes('fonts.googleapis.com') || event.request.url.includes('fonts.gstatic.com')) {
    event.respondWith(
      caches.open(CACHE_NAME).then((cache) => {
        return cache.match(event.request).then((response) => {
          return response || fetch(event.request).then((networkResponse) => {
            cache.put(event.request, networkResponse.clone());
            return networkResponse;
          });
        });
      })
    );
    return;
  }

  // Handle App Assets (Cache First, fall back to Network)
  event.respondWith(
    caches.match(event.request).then((response) => {
      return response || fetch(event.request);
    })
  );
});