const CACHE_NAME = 'wealthysmart-v1';
const STATIC_ASSETS = ['/', '/index.html'];

self.addEventListener('install', (event) => {
  event.waitUntil(
    caches.open(CACHE_NAME).then((cache) => cache.addAll(STATIC_ASSETS))
  );
  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) => {
  const { request } = event;
  const url = new URL(request.url);

  // Network-first for API calls
  if (url.pathname.startsWith('/api/')) {
    event.respondWith(fetch(request).catch(() => caches.match(request)));
    return;
  }

  // Cache-first for static assets
  if (url.pathname.startsWith('/assets/')) {
    event.respondWith(
      caches.match(request).then((cached) => cached || fetch(request).then((res) => {
        const clone = res.clone();
        caches.open(CACHE_NAME).then((cache) => cache.put(request, clone));
        return res;
      }))
    );
    return;
  }

  // Network-first for navigation, fallback to cached index.html
  if (request.mode === 'navigate') {
    event.respondWith(
      fetch(request).catch(() => caches.match('/index.html'))
    );
    return;
  }

  // Default: network with cache fallback
  event.respondWith(fetch(request).catch(() => caches.match(request)));
});