const CACHE_NAME = 'edupay-kantin-v1';

// Daftar file yang mau disimpan di memori HP (biar loading cepat)
const urlsToCache = [
  './index.html',
  './manifest.json'
];

// 1. Proses Install PWA
self.addEventListener('install', event => {
  event.waitUntil(
    caches.open(CACHE_NAME)
      .then(cache => {
        console.log('Cache Kantin dibuka');
        return cache.addAll(urlsToCache);
      })
  );
});

// 2. Strategi Network First (Cek koneksi internet dulu, kalau offline baru ambil dari cache)
self.addEventListener('fetch', event => {
  event.respondWith(
    fetch(event.request).catch(() => {
      return caches.match(event.request);
    })
  );
});

// 3. Bersihkan Cache lama jika ada update
self.addEventListener('activate', event => {
  event.waitUntil(
    caches.keys().then(cacheNames => {
      return Promise.all(
        cacheNames.map(cacheName => {
          if (cacheName !== CACHE_NAME) {
            return caches.delete(cacheName);
          }
        })
      );
    })
  );
});