const CACHE = 'noted-v3';
const STATIC = ['./fry.png', './manifest.json'];

self.addEventListener('install', e => {
    e.waitUntil(caches.open(CACHE).then(c => c.addAll(STATIC)));
    self.skipWaiting();
});

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

self.addEventListener('fetch', e => {
    // Skip API calls entirely
    if (e.request.url.includes('/api/')) return;

    // HTML: always network-first so updates are instant
    if (e.request.mode === 'navigate') {
        e.respondWith(
            fetch(e.request).catch(() => caches.match('./index.html'))
        );
        return;
    }

    // Static assets: cache-first
    e.respondWith(
        caches.match(e.request).then(cached => cached || fetch(e.request).then(res => {
            if (res.ok) caches.open(CACHE).then(c => c.put(e.request, res.clone()));
            return res;
        }))
    );
});