// sw.js — service worker for the notification + push test page.

self.addEventListener('install', () => self.skipWaiting());
self.addEventListener('activate', (event) => event.waitUntil(self.clients.claim()));

// Server-sent push lands here even when every tab is closed.
self.addEventListener('push', (event) => {
  const data = event.data ? event.data.json() : {};
  event.waitUntil(
    self.registration.showNotification(data.title || 'Push', {
      body: data.body || '',
      icon: 'https://dummyimage.com/192x192/47a/fff.png&text=%E2%86%93',
      vibrate: [120, 60, 120],
      tag: 'push'
    })
  );
});

// Handle taps on the notification or its action buttons.
self.addEventListener('notificationclick', (event) => {
  const action = event.action; // '', 'open', or 'dismiss'
  event.notification.close();
  if (action === 'dismiss') return;

  event.waitUntil(
    self.clients.matchAll({ type: 'window', includeUncontrolled: true }).then((windows) => {
      for (const win of windows) {
        if ('focus' in win) return win.focus();
      }
      if (self.clients.openWindow) return self.clients.openWindow('/');
    })
  );
});