const CACHE_NAME = 'bm-manager-v1';
const ASSETS = [
  '/',
  '/index.html',
  '/style.css',
  '/script.js',
  '/manifest.webmanifest'
];

self.addEventListener('install', (event) => {
  event.waitUntil(
    caches.open(CACHE_NAME).then((cache) => cache.addAll(ASSETS))
  );
  self.skipWaiting();
});

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

self.addEventListener('fetch', (event) => {
  if (event.request.method !== 'GET') return;
  event.respondWith(
    caches.match(event.request).then((cached) => cached || fetch(event.request))
  );
});