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

import { confirmBookingByConfirmationToken, getBookingByConfirmationToken, getBookingInventorySummary } from '../../../../utils/booking-repository'
import { getRequiredRouteParam, httpError } from '../../../../utils/http'
import { sendBookingTicketReceiptViaWhatsApp } from '../../../../utils/whatsapp'

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

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

  if (existingBooking.status === 'confirmed') {
    return {
      booking: existingBooking,
      alreadyConfirmed: true,
      ticketReceiptWhatsApp: {
        sent: false,
        skipped: true,
        recipientPhone: existingBooking.customerPhone,
        apiRecipientPhone: existingBooking.customerPhone.replace(/\D/g, ''),
        error: 'Booking was already confirmed earlier.'
      }
    }
  }

  const summary = await getBookingInventorySummary()

  if (summary.leftSeats !== null && existingBooking.seatCount > summary.leftSeats) {
    httpError(409, 'Not enough capacity left to confirm this booking')
  }

  const booking = await confirmBookingByConfirmationToken(token)

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

  const ticketReceiptWhatsApp = await sendBookingTicketReceiptViaWhatsApp(event, booking)

  return {
    booking,
    alreadyConfirmed: false,
    ticketReceiptWhatsApp
  }
})