/*
 * Service Worker — NUR für Web-Push-Benachrichtigungen.
 * BEWUSST OHNE fetch-Handler/Caching, damit das Laden der App niemals beeinflusst wird.
 */
self.addEventListener('install', () => self.skipWaiting())
self.addEventListener('activate', (event) => event.waitUntil(self.clients.claim()))

self.addEventListener('push', (event) => {
  let data = {}
  try {
    data = event.data ? event.data.json() : {}
  } catch {
    data = {}
  }
  const title = data.title || 'Zucht der kleinen Chaoten'
  const body = data.body || ''
  const url = data.url || '/hilfe/tickets'
  event.waitUntil(
    self.registration.showNotification(title, {
      body,
      icon: '/icon-192.png',
      badge: '/icon-192.png',
      data: { url },
    }),
  )
})

self.addEventListener('notificationclick', (event) => {
  event.notification.close()
  const url = (event.notification.data && event.notification.data.url) || '/hilfe/tickets'
  event.waitUntil(
    self.clients.matchAll({ type: 'window', includeUncontrolled: true }).then((clients) => {
      for (const client of clients) {
        if ('focus' in client) {
          if ('navigate' in client) {
            try {
              client.navigate(url)
            } catch {
              /* ignorieren */
            }
          }
          return client.focus()
        }
      }
      if (self.clients.openWindow) return self.clients.openWindow(url)
      return undefined
    }),
  )
})