import type { BookingMode, CreateBookingResponse, TicketType } from '~~/shared/booking'

import { getSeatCount } from '~~/shared/booking'

import { buildAppUrl } from '../../utils/app-url'
import {
  createBooking,
  getActiveBookingModeOptionByCode,
  getActiveTicketCatalogItemByCode
} from '../../utils/booking-repository'
import { buildBookingMessage, parseCreateBookingInput } from '../../utils/bookings'
import { assertBadRequest } from '../../utils/http'
import { getPublicContactById } from '../../utils/user-repository'
import { buildWhatsAppDeepLink } from '../../utils/whatsapp'

export default defineEventHandler(async (event): Promise<CreateBookingResponse> => {
  const body = await readBody<{
    customerName?: string
    customerPhone?: string
    bookingMode?: BookingMode | string | null
    quantity?: number
    ticketType?: TicketType
    personInChargeId?: string
  }>(event)

  const input = parseCreateBookingInput(body)
  const [personInCharge, bookingMode, ticket] = await Promise.all([
    getPublicContactById(input.personInChargeId),
    getActiveBookingModeOptionByCode(input.bookingMode),
    getActiveTicketCatalogItemByCode(input.ticketType)
  ])

  assertBadRequest(personInCharge, 'Selected person in charge is not available')
  assertBadRequest(bookingMode, 'Booking mode is invalid')
  assertBadRequest(ticket, 'Ticket category is invalid')
  assertBadRequest(bookingMode.eventId === ticket.eventId, 'Booking mode and ticket category must belong to the same event')

  const seatCount = getSeatCount(bookingMode, input.quantity)
  const totalPrice = seatCount * ticket.price

  const { booking, confirmationToken } = await createBooking({
    eventId: bookingMode.eventId,
    customerName: input.customerName,
    customerPhone: input.customerPhone,
    bookingModeId: bookingMode.id,
    bookingMode: bookingMode.value,
    quantity: input.quantity,
    seatCount,
    ticketTypeId: ticket.id,
    ticketType: ticket.value,
    unitPrice: ticket.price,
    totalPrice,
    personInChargeId: personInCharge.id
  })

  const confirmationUrl = buildAppUrl(event, `/confirmation/${confirmationToken}`)
  const whatsappMessage = buildBookingMessage(booking, confirmationUrl)
  const whatsappUrl = buildWhatsAppDeepLink(booking.personInChargePhoneNumber, whatsappMessage)

  return {
    booking,
    confirmationUrl,
    whatsappUrl
  }
})