import { PointType } from "@scandic-hotels/common/constants/pointType"

import type { imageSchema } from "@scandic-hotels/trpc/routers/hotels/schemas/image"
import type { ProductTypeCheque } from "@scandic-hotels/trpc/types/availability"
import type { Amenities } from "@scandic-hotels/trpc/types/hotel"
import type { IntlShape } from "react-intl"
import type { z } from "zod"

import type { HotelResponse } from "../SelectHotel/helpers"

type ApiImage = z.infer<typeof imageSchema>
interface Coordinates {
  lat: number
  lng: number
}

export type HotelPin = {
  bookingCode?: string | null
  name: string
  coordinates: Coordinates
  chequePrice: ProductTypeCheque["localPrice"] | null
  publicPrice: number | null
  memberPrice: number | null
  redemptionPrice: number | null
  pointsType: PointType | null
  voucherPrice: number | null
  rateType: string | null
  currency: string
  images: ApiImage[]
  amenities: Amenities
  ratings: number | null
  operaId: string
  facilityIds: number[]
  hasEnoughPoints: boolean
}

export function getHotelPins(
  hotels: HotelResponse[],
  intl: IntlShape,
  currencyValue?: string
): HotelPin[] {
  if (!hotels.length) {
    return []
  }

  return hotels.map(({ availability, hotel, additionalData }) => {
    const productType = availability.productType
    const redemptionRate = productType?.redemptions?.find(
      (r) => r?.localPrice.pointsPerStay
    )
    const chequePrice = productType?.bonusCheque?.localPrice
    const voucherPrice = productType?.voucher?.numberOfVouchers
    if (chequePrice || voucherPrice) {
      currencyValue = chequePrice ? "CC" : "Voucher"
    }

    const redemptionPrice = redemptionRate?.localPrice.pointsPerStay ?? null
    const redemptionCurrency = getRedemptionCurrencyText(
      redemptionPrice,
      redemptionRate?.localPrice.pointsType ?? null,
      intl
    )

    return {
      bookingCode: availability.bookingCode,
      coordinates: {
        lat: hotel.location.latitude,
        lng: hotel.location.longitude,
      },
      name: hotel.name,
      chequePrice: chequePrice ?? null,
      publicPrice: productType?.public?.localPrice.pricePerNight ?? null,
      memberPrice: productType?.member?.localPrice.pricePerNight ?? null,
      redemptionPrice,
      pointsType: redemptionRate?.localPrice.pointsType ?? null,
      voucherPrice: voucherPrice ?? null,
      rateType:
        productType?.public?.rateType ?? productType?.member?.rateType ?? null,
      currency:
        productType?.public?.localPrice.currency ||
        productType?.member?.localPrice.currency ||
        redemptionCurrency ||
        currencyValue ||
        "N/A",
      images: [
        hotel.hotelContent.images,
        ...(additionalData.gallery?.heroImages ?? []),
      ],
      amenities: hotel.detailedFacilities
        .map((facility) => ({
          ...facility,
          icon: facility.icon ?? "None",
        }))
        .slice(0, 5),
      ratings: hotel.ratings?.tripAdvisor.rating ?? null,
      operaId: hotel.operaId,
      facilityIds: hotel.detailedFacilities.map((facility) => facility.id),
      hasEnoughPoints: !!availability.productType?.redemptions?.some(
        (r) => r.hasEnoughPoints
      ),
    }
  })
}

function getRedemptionCurrencyText(
  points: number | null,
  pointsType: PointType | null,
  intl: IntlShape
) {
  if (points === null || pointsType === null) return null

  switch (pointsType) {
    case PointType.SCANDIC: {
      return intl.formatMessage(
        {
          id: "price.numberOfScandicPoints",
          defaultMessage:
            "{numberOfScandicPoints, plural, one {Point} other {Points}}",
        },
        {
          numberOfScandicPoints: points,
        }
      )
    }
    case PointType.EUROBONUS: {
      return intl.formatMessage(
        {
          id: "price.numberOfEuroBonusPoints",
          defaultMessage:
            "{numberOfEuroBonusPoints, plural, one {EB Point} other {EB Points}}",
        },
        {
          numberOfEuroBonusPoints: points,
        }
      )
    }
    default: {
      const _exhaustiveCheck: never = pointsType
      return null
    }
  }
}