import { Permissions } from 'expo'

export default async function verifyPushNotificationsPermissions() {
  const { status: existingStatus } = await Permissions.getAsync(Permissions.NOTIFICATIONS)
  let finalStatus = existingStatus

  // only ask if permissions have not already been determined, because
  // iOS won't necessarily prompt the user a second time.
  if (existingStatus !== 'granted') {
  // Android remote notification permissions are granted during the app
  // install, so this will only ask on iOS
    const { status } = await Permissions.askAsync(Permissions.NOTIFICATIONS)
    finalStatus = status
  }
  if (finalStatus === 'undetermined') {
    console.log('Cannot use push notifications on simulator')
  }
  // Stop here if the user did not grant permissions
  if (finalStatus !== 'granted') {
    return
  }
}