import type { UpdateBookingDetailsResponse } from '~~/shared/booking'

import {
  clearBookingTransactionDocumentByConfirmationToken,
  getBookingByConfirmationToken,
  updateBookingPaymentMethodByConfirmationToken
} from '../../../../utils/booking-repository'
import { parsePaymentMethodInput } from '../../../../utils/bookings'
import { getRequiredRouteParam, httpError } from '../../../../utils/http'
import { deleteTransactionDocument } from '../../../../utils/transaction-documents'

export default defineEventHandler(async (event): Promise<UpdateBookingDetailsResponse> => {
  const token = getRequiredRouteParam(event, 'token', 'Confirmation token')
  const existingBooking = await getBookingByConfirmationToken(token, { includeTransactionDocument: true })

  if (!existingBooking) {
    httpError(404, 'Booking not found')
  }

  if (existingBooking.status !== 'pending') {
    httpError(409, 'Payment details can only be changed before confirmation')
  }

  const body = await readBody<{ paymentMethod?: string | null }>(event)
  const input = parsePaymentMethodInput(body)

  const booking = await updateBookingPaymentMethodByConfirmationToken({
    confirmationToken: token,
    paymentMethod: input.paymentMethod
  })

  if (!booking) {
    httpError(404, 'Booking not found')
  }

  if (input.paymentMethod === 'cash') {
    const cleared = await clearBookingTransactionDocumentByConfirmationToken(token)

    if (cleared) {
      await deleteTransactionDocument(cleared.previousStorageName)

      return {
        booking: cleared.booking
      }
    }
  }

  return {
    booking
  }
})