const CACHE_NAME = 'hotelsync-v1'

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

self.addEventListener('push', event => {
  if (!event.data) return
  let data
  try { data = event.data.json() } catch { data = { title: 'HotelSync', body: event.data.text() } }

  const title = data.title ?? 'HotelSync'
  const options = {
    body: data.body ?? '',
    icon: data.icon ?? '/icons/icon-192.png',
    badge: '/icons/icon-72.png',
    tag: data.tag,
    renotify: !!data.tag,
    data: { url: data.url ?? '/' },
    vibrate: [200, 100, 200],
  }

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

self.addEventListener('notificationclick', event => {
  event.notification.close()
  const url = event.notification.data?.url ?? '/'
  event.waitUntil(
    self.clients.matchAll({ type: 'window', includeUncontrolled: true }).then(clients => {
      const existing = clients.find(c => c.url.includes(self.location.origin))
      if (existing) { existing.focus(); existing.navigate(url) }
      else self.clients.openWindow(url)
    })
  )
})