export default defineNuxtPlugin(() => {
  if ('serviceWorker' in navigator) {
    navigator.serviceWorker.ready.then(registration => {
      console.log('[PWA] Service Worker ready:', registration.scope)
    })

    // Handle push messages when app is open
    navigator.serviceWorker.addEventListener('message', event => {
      if (event.data?.type === 'PUSH_RECEIVED') {
        const { title, body } = event.data.payload || {}
        // Local alarm: vibrate and show notification
        if (navigator.vibrate) {
          navigator.vibrate([200, 100, 200])
        }
        if ('Notification' in window && Notification.permission === 'granted') {
          new Notification(title || 'XFlow Alarm', {
            body: body || 'Alarm triggered',
            icon: '/pwa-192x192.svg',
            badge: '/favicon.svg',
            ...({ vibrate: [200, 100, 200] } as any)
          })
        }
      }
    })
  }
})