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

    try {
      return event.data.json();
    } catch {
      return {
        body: event.data.text(),
      };
    }
  })();

  const title = payload.title || '订阅更新';
  const url = payload.url || '/';
  const options = {
    body: payload.body || '',
    icon: payload.icon || '/favicon.svg',
    badge: payload.badge || '/favicon.ico',
    tag: payload.tag || 'termi-subscription',
    data: {
      url,
      ...(payload.data || {}),
    },
  };

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

self.addEventListener('notificationclick', (event) => {
  event.notification.close();
  const targetUrl = event.notification?.data?.url || '/';

  event.waitUntil(
    self.clients.matchAll({ type: 'window', includeUncontrolled: true }).then((clients) => {
      for (const client of clients) {
        if ('focus' in client && client.url === targetUrl) {
          return client.focus();
        }
      }

      if (self.clients.openWindow) {
        return self.clients.openWindow(targetUrl);
      }

      return undefined;
    }),
  );
});