import { z } from "zod"

import { Lang } from "@scandic-hotels/common/constants/language"
import { createLogger } from "@scandic-hotels/common/logger/createLogger"

import { SEARCH_TYPE_REDEMPTION } from "../../../constants/booking"
import { unauthorizedError } from "../../../errors"
import { safeProtectedServiceProcedure } from "../../../procedures"
import { isValidSession } from "../../../utils/session"
import { baseBookingSchema, baseRoomSchema, selectedRoomSchema } from "../input"
import { getRoomsAvailability } from "../services/getRoomsAvailability"
import { getSelectedRoomAvailability } from "../utils"

export const myStayRoomAvailabilityInputSchema = z.object({
  booking: baseBookingSchema.extend({
    room: baseRoomSchema.merge(selectedRoomSchema),
  }),
  lang: z.nativeEnum(Lang),
})

type Context = {
  userToken: string | null
  userPoints?: number
}

const logger = createLogger("trpc:availability:myStay")
export const myStay = safeProtectedServiceProcedure
  .input(myStayRoomAvailabilityInputSchema)
  .use(async ({ ctx, input, next }) => {
    const userToken = await ctx.getScandicUserToken()

    if (input.booking.searchType === SEARCH_TYPE_REDEMPTION) {
      const hasValidSession = isValidSession(ctx.session)
      if (!hasValidSession) {
        throw unauthorizedError()
      }

      const pointsValue = await ctx.getUserPointsBalance()
      if (pointsValue && userToken) {
        return next<Context>({
          ctx: {
            userToken,
            userPoints: pointsValue,
          },
        })
      }
    }

    return next<Context>({
      ctx: {
        userToken,
      },
    })
  })
  .query(async function ({ ctx, input }) {
    const [availability] = await getRoomsAvailability(
      {
        booking: {
          ...input.booking,
          rooms: [input.booking.room],
        },
        lang: input.lang,
      },
      ctx.userToken,
      ctx.serviceToken,
      ctx.userPoints
    )

    if (!availability || "error" in availability) {
      return null
    }

    const bookingRoom = input.booking.room
    const selected = getSelectedRoomAvailability(
      bookingRoom.rateCode,
      availability.rateDefinitions,
      availability.roomConfigurations,
      bookingRoom.roomTypeCode,
      ctx.userPoints
    )

    if (!selected) {
      logger.error("Unable to find selected room")
      return null
    }

    return {
      product: selected.product,
      selectedRoom: selected.selectedRoom,
    }
  })