/* sw.js — Matrix PWA service worker
 * PRECACHE_URLS is replaced at build time by the generate-sw Vite plugin.
 * Registration is gated to import.meta.env.PROD in main.js, so this template
 * file is never evaluated by browsers during development.
 */
const CACHE_NAME   = 'timmy-matrix-v1';
const PRECACHE_URLS = __PRECACHE_URLS__;

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

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

self.addEventListener('fetch', event => {
  if (event.request.method !== 'GET') return;
  event.respondWith(
    caches.match(event.request).then(cached => {
      if (cached) return cached;
      return fetch(event.request).then(response => {
        if (!response || response.status !== 200 || response.type !== 'basic') {
          return response;
        }
        caches.open(CACHE_NAME).then(cache => cache.put(event.request, response.clone()));
        return response;
      });
    })
  );
});