self.addEventListener('install', (event) => {
  event.waitUntil(self.skipWaiting());
});

self.addEventListener('activate', (event) => {
  event.waitUntil(self.clients.claim());
});

self.addEventListener('message', (event) => {
  const data = event.data;
  if (!data || data.type !== 'notify') {
    return;
  }

  event.waitUntil(
    self.registration.showNotification(data.title || 'Panel kelnera', {
      body: data.body || '',
      tag: data.tag || 'waiter-alert',
      renotify: true,
      requireInteraction: true,
    })
  );
});