/*
 * SkateSpots push service worker.
 *
 * Receives a Web Push payload from `push-service/` — which is CONTENT-FREE
 * ({ title, body, wrapId, url }) because the server never decrypts anything —
 * and shows an OS notification. Tapping it focuses/opens the app, where the real
 * message is fetched by wrapId and decrypted locally.
 *
 * Deliberately tiny: no caching, no offline logic.
 */
self.addEventListener('push', (event) => {
  let data = {};
  try {
    data = event.data ? event.data.json() : {};
  } catch {
    /* non-JSON payload — fall back to defaults */
  }
  const title = data.title || 'SkateSpots';
  const body = data.body || 'You have a new notification';
  event.waitUntil(
    self.registration.showNotification(title, {
      body,
      tag: data.wrapId || undefined,
      data: { url: data.url || '/' },
    }),
  );
});

self.addEventListener('notificationclick', (event) => {
  event.notification.close();
  const target = (event.notification.data && event.notification.data.url) || '/';
  event.waitUntil(
    self.clients.matchAll({ type: 'window', includeUncontrolled: true }).then((list) => {
      for (const client of list) {
        if ('focus' in client) return client.focus();
      }
      return self.clients.openWindow(target);
    }),
  );
});