const registerServiceWorker = async () => {
  const swRegistration = await navigator.serviceWorker.register("/sw.js");
  return swRegistration;
};

const requestNotificationPermission = async () => {
  // return value: 'granted', 'default', 'denied'
  return await window.Notification.requestPermission();
};

export async function requestNotificationAndServiceWorker() {
  if (!("serviceWorker" in navigator)) {
    throw new Error("No Service Worker support!");
  }
  if (!("PushManager" in window)) {
    throw new Error("No Push API Support!");
  }
  const permission = await requestNotificationPermission();
  if(permission==='granted') await registerServiceWorker();
  return permission
}

export function windowNotificationPermission() {
  return window.Notification.permission
}

export function notificationCount() {
  return this.$matrix.notificationCount
}