self.addEventListener('push', function (event) {
  var data = {};
  try { data = event.data.json(); } catch (e) { data = { title: '沈晏', body: event.data ? event.data.text() : '' }; }
  event.waitUntil(
    self.registration.showNotification(data.title || '沈晏', {
      body: data.body || '',
      icon: '/icon-192.png',
      badge: '/icon-192.png',
      vibrate: [200, 100, 200],
      tag: 'shenyan-push',
      renotify: true,
    })
  );
});

self.addEventListener('notificationclick', function (event) {
  event.notification.close();
  event.waitUntil(
    clients.matchAll({ type: 'window', includeUncontrolled: true }).then(function (list) {
      for (var i = 0; i < list.length; i++) {
        if (list[i].url && 'focus' in list[i]) return list[i].focus();
      }
      if (clients.openWindow) return clients.openWindow('/');
    })
  );
});