web/components/HotelReservation/SelectRate/RateSummary/utils.ts

import {
  type RoomPackage,
  RoomPackageCodeEnum,
} from "@/types/components/hotelReservation/selectRate/roomFilter"
import type { Rate } from "@/types/components/hotelReservation/selectRate/selectRate"

interface TotalPrice {
  localPrice: { currency: string; price: number }
  requestedPrice?: { currency: string; price: number }
}

export const calculateTotalPrice = (
  selectedRateSummary: Rate[],
  isUserLoggedIn: boolean,
  petRoomPackage: RoomPackage | undefined
) => {
  return selectedRateSummary.reduce<TotalPrice>(
    (total, room) => {
      const priceToUse =
        isUserLoggedIn && room.member ? room.member : room.public
      const isPetRoom = room.features.some(
        (feature) => feature.code === RoomPackageCodeEnum.PET_ROOM
      )
      const petRoomPrice =
        isPetRoom && petRoomPackage
          ? isUserLoggedIn
            ? Number(petRoomPackage.localPrice.totalPrice || 0)
            : Number(petRoomPackage.requestedPrice.totalPrice || 0)
          : 0

      return {
        localPrice: {
          currency: priceToUse.localPrice.currency,
          price:
            total.localPrice.price +
            priceToUse.localPrice.pricePerStay +
            petRoomPrice,
        },
        requestedPrice: priceToUse.requestedPrice
          ? {
              currency: priceToUse.requestedPrice.currency,
              price:
                (total.requestedPrice?.price ?? 0) +
                priceToUse.requestedPrice.pricePerStay +
                petRoomPrice,
            }
          : undefined,
      }
    },
    {
      localPrice: {
        currency: selectedRateSummary[0].public.localPrice.currency,
        price: 0,
      },
      requestedPrice: undefined,
    }
  )
}