self.addEventListener('push', (event) => {
  console.log('[SW] push received', event.data?.text());
  if (!event.data) return;

  let title = 'HealthyFit';
  let body = 'You have a new notification';
  let url = '/';
  try {
    const data = event.data.json();
    title = data.title;
    body = data.body;
    url = data.url ?? '/';
  } catch {
    body = event.data.text();
  }

  event.waitUntil(
    self.registration.showNotification(title, {
      body,
      icon: '/icons/icon-192.png',
      badge: '/icons/icon-192.png',
      data: { url },
    })
  );
});

self.addEventListener('notificationclick', (event) => {
  event.notification.close();
  const url = event.notification.data?.url ?? '/';
  event.waitUntil(
    self.clients
      .matchAll({ type: 'window', includeUncontrolled: true })
      .then((clients) => {
        const existing = clients.find((c) => c.url.includes(url));
        if (existing) return existing.focus();
        return self.clients.openWindow(url);
      })
  );
});