import { isWorkerErrorForOperation, isWorkerMessageEnvelope, isRecord, readWorkerErrorData } from './workerMessage'

export function decideCreateNotificationWorkerMessage(params: {
  eventData: unknown
  expectedEventId: string
}):
  | { status: 'ignore' }
  | { status: 'resolve' }
  | { status: 'reject'; message: string } {
  if (!isWorkerMessageEnvelope(params.eventData)) {
    return { status: 'ignore' }
  }
  const responseType = params.eventData.type
  const responseData = params.eventData.data

  if (responseType === 'CREATE_NOTIFICATION_SUCCESS') {
    if (!isRecord(responseData) || responseData.eventId !== params.expectedEventId) {
      return { status: 'ignore' }
    }
    return { status: 'resolve' }
  }

  if (responseType !== 'ERROR') {
    return { status: 'ignore' }
  }

  const errorData = readWorkerErrorData(responseData)
  if (!isWorkerErrorForOperation(errorData, 'CREATE_NOTIFICATION')) {
    return { status: 'ignore' }
  }
  return { status: 'reject', message: errorData.error ?? 'Write worker error' }
}