import { dt } from "@/lib/dt"

import { PriceTypeEnum } from "@/types/components/hotelReservation/myStay/myStay"
import type { Price } from "@/types/components/hotelReservation/price"
import { CurrencyEnum } from "@/types/enums/currency"
import type { Room } from "@/types/stores/my-stay"

export function mapToPrice(room: Room) {
  switch (room.priceType) {
    case PriceTypeEnum.cheque:
      return {
        corporateCheque: {
          additionalPricePerStay: room.totalPrice,
          currency: room.roomPrice.perStay.local.currency,
          numberOfCheques: room.cheques,
        },
      }
    case PriceTypeEnum.money:
      return {
        regular: {
          currency: room.currencyCode,
          pricePerNight: room.roomPrice.perNight.local.price,
          pricePerStay: room.totalPrice,
        },
      }
    case PriceTypeEnum.points:
      const nights = dt(room.checkOutDate)
        .startOf("day")
        .diff(dt(room.checkInDate).startOf("day"), "days")
      return {
        redemption: {
          additionalPricePerStay: room.totalPrice,
          currency: room.currencyCode,
          pointsPerNight: room.roomPoints / nights,
          pointsPerStay: room.roomPoints,
        },
      }
    case PriceTypeEnum.voucher:
      return {
        voucher: {
          numberOfVouchers: room.vouchers,
        },
      }
    default:
      throw new Error(`Unknown payment method!`)
  }
}

export function calculateTotalPrice(rooms: Room[], currency: CurrencyEnum) {
  return rooms.reduce<Price>(
    (total, room) => {
      switch (room.priceType) {
        case PriceTypeEnum.cheque:
          {
            total.local.currency = CurrencyEnum.CC
            total.local.price = total.local.price + room.cheques
          }
          break
        case PriceTypeEnum.money:
          {
            total.local.price = total.local.price + room.totalPrice

            if (!total.local.currency) {
              total.local.currency = room.currencyCode
            }
          }
          break
        case PriceTypeEnum.points:
          {
            total.local.currency = CurrencyEnum.POINTS
            total.local.price = total.local.price + room.roomPoints
          }
          break
        case PriceTypeEnum.voucher:
          total.local.currency = CurrencyEnum.Voucher
          total.local.price = total.local.price + room.vouchers
          break
      }

      switch (room.priceType) {
        case PriceTypeEnum.cheque:
        case PriceTypeEnum.points:
        case PriceTypeEnum.voucher:
          {
            if (room.totalPrice) {
              total.local.additionalPrice =
                (total.local.additionalPrice || 0) + room.totalPrice
            }

            if (!total.local.additionalPriceCurrency) {
              if (room.currencyCode) {
                total.local.additionalPriceCurrency = room.currencyCode
              } else {
                total.local.additionalPriceCurrency = currency
              }
            }
          }
          break
      }

      return total
    },
    {
      local: {
        currency,
        price: 0,
      },
      requested: undefined,
    }
  )
}