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;
  }

  // Only handle http(s) requests — skip chrome-extension:// etc.
  if (!url.protocol.startsWith('http')) 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)));
});

// --- Push Notifications ---

self.addEventListener('push', (event) => {
  if (!event.data) return;

  let data;
  try {
    data = event.data.json();
  } catch {
    // Fallback for plain-text pushes (e.g. browser test pushes)
    data = { title: 'WealthySmart', body: event.data.text() };
  }

  const options = {
    body: data.body,
    icon: '/icons/icon-192.png',
    badge: '/icons/icon-192.png',
    data: { url: data.url || '/' },
    vibrate: [200, 100, 200],
    tag: 'transaction',
    renotify: true,
  };

  event.waitUntil(self.registration.showNotification(data.title, options));
});

self.addEventListener('notificationclick', (event) => {
  event.notification.close();

  const url = event.notification.data?.url || '/';
  event.waitUntil(
    clients.matchAll({ type: 'window', includeUncontrolled: true }).then((windowClients) => {
      for (const client of windowClients) {
        if (client.url.includes(self.location.origin) && 'focus' in client) {
          client.navigate(url);
          return client.focus();
        }
      }
      return clients.openWindow(url);
    })
  );
});