import { CurrencyEnum } from "@scandic-hotels/common/constants/currency"
import { formatPrice } from "@scandic-hotels/common/utils/numberFormatting"

import type { IntlShape } from "react-intl"

import type { Room } from "@/types/stores/my-stay"

export function calculateTotalPrice(
  rooms: Pick<
    Room,
    | "cheques"
    | "vouchers"
    | "roomPoints"
    | "roomPointType"
    | "totalPoints"
    | "totalPrice"
    | "isCancelled"
  >[],
  currency: CurrencyEnum,
  intl: IntlShape,
  allRoomsAreCancelled: boolean
) {
  const totals = rooms.reduce(
    (total, room) => {
      if (!allRoomsAreCancelled && room.isCancelled) {
        return total
      }

      if (room.cheques) {
        total.cheques = total.cheques + room.cheques
      }

      if (room.vouchers) {
        total.vouchers = total.vouchers + room.vouchers
      }

      if (
        room.roomPoints &&
        room.roomPointType &&
        room.roomPointType !== "Scandic"
      ) {
        total.partnerPoints = total.partnerPoints + room.roomPoints
        total.partnerPointsCurrency = room.roomPointType ?? null
      }

      if (room.totalPoints) {
        total.scandicFriendsPoints =
          total.scandicFriendsPoints + room.totalPoints
      }

      // room.totalPrice is a negative value when
      // its a vouchers booking (╯°□°）╯︵ ┻━┻
      if (room.totalPrice > 0) {
        total.cash = total.cash + room.totalPrice
      }

      return total
    },
    {
      cash: 0,
      cheques: 0,
      scandicFriendsPoints: 0,
      partnerPoints: 0,
      partnerPointsCurrency: null as Room["roomPointType"],
      vouchers: 0,
    }
  )

  const priceParts: string[] = []
  if (totals.vouchers) {
    priceParts.push(
      `${totals.vouchers} ${intl.formatMessage(
        {
          id: "price.numberOfVouchers",
          defaultMessage:
            "{numberOfVouchers, plural, one {Voucher} other {Vouchers}}",
        },
        {
          numberOfVouchers: totals.vouchers,
        }
      )}`
    )
  }

  if (totals.cheques) {
    priceParts.push(`${totals.cheques} ${CurrencyEnum.CC}`)
  }

  if (totals.scandicFriendsPoints) {
    priceParts.push(`${totals.scandicFriendsPoints} ${CurrencyEnum.POINTS}`)
  }

  if (totals.partnerPoints) {
    priceParts.push(`${totals.partnerPoints} ${totals.partnerPointsCurrency}`)
  }

  if (totals.cash) {
    const cashPrice = formatPrice(intl, totals.cash, currency)
    priceParts.push(cashPrice)
  }

  return priceParts.join(" + ")
}

export function calculateTotalPoints(
  rooms: Room[],
  allRoomsAreCancelled: boolean
) {
  return rooms.reduce((total, room) => {
    if (!allRoomsAreCancelled && room.isCancelled) {
      return total
    }
    return total + room.totalPoints
  }, 0)
}

export function isAllRoomsCancelled(rooms: Room[]) {
  return !rooms.some((room) => room.isCancelled === false)
}