import { Lang } from "@scandic-hotels/common/constants/language"
import { getCacheClient } from "@scandic-hotels/common/dataCache"
import { dt } from "@scandic-hotels/common/dt"
import { createLogger } from "@scandic-hotels/common/logger/createLogger"
import { createCounter } from "@scandic-hotels/common/telemetry"

import { env } from "../../../env/server"
import { router } from "../.."
import * as api from "../../api"
import { BreakfastPackageEnum } from "../../enums/breakfast"
import { badRequestError } from "../../errors"
import {
  contentStackBaseWithServiceProcedure,
  safeProtectedServiceProcedure,
  serviceProcedure,
} from "../../procedures"
import { getHotelPageUrls } from "../../routers/contentstack/hotelPage/utils"
import {
  ancillaryPackageInputSchema,
  breakfastPackageInputSchema,
  cityCoordinatesInputSchema,
  getAdditionalDataInputSchema,
  getDestinationsMapDataInput,
  getHotelsByCityIdentifierInput,
  getHotelsByCountryInput,
  getHotelsByCSFilterInput,
  getMeetingRoomsInputSchema,
  hotelInputSchema,
  nearbyHotelIdsInput,
  roomPackagesInputSchema,
} from "../../routers/hotels/input"
import {
  ancillaryPackagesSchema,
  breakfastPackagesSchema,
  getNearbyHotelIdsSchema,
} from "../../routers/hotels/output"
import { isCityLocation } from "../../types/locations"
import { toApiLang } from "../../utils"
import { additionalDataSchema } from "./schemas/hotel/include/additionalData"
import { meetingRoomsSchema } from "./schemas/meetingRoom"
import { getHotelIdsByCityIdentifier } from "./services/getCityByCityIdentifier"
import { getCountries } from "./services/getCountries"
import { getHotel } from "./services/getHotel"
import { getHotelIdsByCityId } from "./services/getHotelIdsByCityId"
import { getHotelIdsByCountry } from "./services/getHotelIdsByCountry"
import { getHotelsByHotelIds } from "./services/getHotelsByHotelIds"
import { getLocationsByCountries } from "./services/getLocationsByCountries"
import { getPackages } from "./services/getPackages"
import { availability } from "./availability"
import { locationsRouter } from "./locations"

import type { HotelListingHotelData } from "../../types/hotel"

const hotelQueryLogger = createLogger("hotelQueryRouter")

export const hotelQueryRouter = router({
  availability,
  get: serviceProcedure
    .input(hotelInputSchema)
    .query(async ({ ctx, input }) => {
      const { hotelId, language } = input

      const [hotelData, hotelPages] = await Promise.all([
        getHotel(input, ctx.serviceToken),
        getHotelPageUrls(language),
      ])
      const hotelPage = hotelPages.find((page) => page.hotelId === hotelId)

      return hotelData
        ? {
            ...hotelData,
            url: hotelPage?.url ?? null,
          }
        : null
    }),
  hotels: router({
    byCountry: router({
      get: contentStackBaseWithServiceProcedure
        .input(getHotelsByCountryInput)
        .query(async ({ ctx, input }) => {
          const { serviceToken } = ctx
          const { country } = input

          const lang = input.lang ?? ctx.lang

          const hotelIds = await getHotelIdsByCountry({
            country,
            serviceToken: ctx.serviceToken,
          })

          return await getHotelsByHotelIds({ hotelIds, lang, serviceToken })
        }),
    }),
    byCityIdentifier: router({
      get: contentStackBaseWithServiceProcedure
        .input(getHotelsByCityIdentifierInput)
        .query(async ({ ctx, input }) => {
          const { lang, serviceToken } = ctx
          const { cityIdentifier } = input

          const hotelIds = await getHotelIdsByCityIdentifier(
            cityIdentifier,
            serviceToken
          )

          return await getHotelsByHotelIds({ hotelIds, lang, serviceToken })
        }),
    }),
    byCSFilter: router({
      get: contentStackBaseWithServiceProcedure
        .input(getHotelsByCSFilterInput)
        .query(async function ({ ctx, input }) {
          const { locationFilter, hotelsToInclude, contentType } = input
          let shouldSortByDistance = true

          const language = ctx.lang
          let hotelsToFetch: string[] = []

          const getHotelsByCSFilterCounter = createCounter(
            "trpc.hotel.hotels",
            "byCSFilter"
          )
          const metricsGetHotelsByCSFilter = getHotelsByCSFilterCounter.init({
            input,
            language,
          })

          metricsGetHotelsByCSFilter.start()

          if (hotelsToInclude.length) {
            hotelsToFetch = hotelsToInclude
            shouldSortByDistance = false
          } else if (locationFilter?.city) {
            const locations = await getLocationsByCountries({
              lang: language,
              serviceToken: ctx.serviceToken,
              citiesByCountry: null,
            })

            if (!locations || locations.length === 0) {
              return []
            }

            const cityId = locations
              .filter(isCityLocation)
              .find((loc) => loc.cityIdentifier === locationFilter.city)?.id

            if (!cityId) {
              metricsGetHotelsByCSFilter.dataError(
                `CityId not found for cityIdentifier: ${locationFilter.city}`,
                {
                  cityIdentifier: locationFilter.city,
                }
              )

              return []
            }

            const hotelIds = await getHotelIdsByCityId({
              cityId,
              serviceToken: ctx.serviceToken,
            })

            if (!hotelIds?.length) {
              metricsGetHotelsByCSFilter.dataError(
                `No hotelIds found for cityId: ${cityId}`,
                {
                  cityId,
                }
              )

              return []
            }

            const filteredHotelIds = hotelIds.filter(
              (id) => !locationFilter.excluded.includes(id)
            )

            hotelsToFetch = filteredHotelIds
          } else if (locationFilter?.country) {
            const hotelIds = await getHotelIdsByCountry({
              country: locationFilter.country,
              serviceToken: ctx.serviceToken,
            })

            if (!hotelIds?.length) {
              metricsGetHotelsByCSFilter.dataError(
                `No hotelIds found for country: ${locationFilter.country}`,
                {
                  country: locationFilter.country,
                }
              )

              return []
            }

            const filteredHotelIds = hotelIds.filter(
              (id) => !locationFilter.excluded.includes(id)
            )

            hotelsToFetch = filteredHotelIds
          }

          if (!hotelsToFetch.length) {
            metricsGetHotelsByCSFilter.dataError(
              `Couldn't find any hotels for given input: ${JSON.stringify(input)}`,
              input
            )

            return []
          }
          const hotels = await getHotelsByHotelIds({
            hotelIds: hotelsToFetch,
            lang: language,
            serviceToken: ctx.serviceToken,
            contentType,
          })

          metricsGetHotelsByCSFilter.success()

          if (shouldSortByDistance) {
            hotels.sort(
              (a, b) =>
                a.hotel.location.distanceToCentre -
                b.hotel.location.distanceToCentre
            )
          }

          return hotels
        }),
    }),
    getAllHotelData: serviceProcedure
      .input(getDestinationsMapDataInput)
      .query(async function ({ input, ctx }) {
        const lang = input?.lang ?? ctx.lang
        const warmup = input?.warmup ?? false

        const fetchHotels = async () => {
          const countries = await getCountries({
            // Countries need to be in English regardless of incoming lang because
            // we use the names as input for API endpoints.
            lang: Lang.en,
            serviceToken: ctx.serviceToken,
          })

          if (!countries) {
            throw new Error("Unable to fetch countries")
          }

          const countryNames = countries.data.map((country) => country.name)
          const hotelData: HotelListingHotelData[] = (
            await Promise.all(
              countryNames.map(async (country) => {
                const hotelIds = await getHotelIdsByCountry({
                  country,
                  serviceToken: ctx.serviceToken,
                })

                const hotels = await getHotelsByHotelIds({
                  hotelIds,
                  lang: lang,
                  serviceToken: ctx.serviceToken,
                })

                return hotels
              })
            )
          ).flat()

          return hotelData
        }

        const cacheClient = await getCacheClient()
        return await cacheClient.cacheOrGet(
          `${lang}:getDestinationsMapData`,
          fetchHotels,
          "max",
          {
            cacheStrategy: warmup ? "fetch-then-cache" : "cache-first",
          }
        )
      }),
  }),

  nearbyHotelIds: serviceProcedure
    .input(nearbyHotelIdsInput)
    .query(async function ({ ctx, input }) {
      const { lang } = ctx
      const apiLang = toApiLang(lang)

      const { hotelId } = input
      const params: Record<string, string | number> = {
        language: apiLang,
      }
      const cacheClient = await getCacheClient()
      return cacheClient.cacheOrGet(
        `${apiLang}:nearbyHotels:${hotelId}`,
        async () => {
          const nearbyHotelsCounter = createCounter(
            "trpc.hotel",
            "nearbyHotelIds"
          )
          const metricsNearbyHotels = nearbyHotelsCounter.init({
            params,
            hotelId,
          })

          metricsNearbyHotels.start()

          const apiResponse = await api.get(
            api.endpoints.v1.Hotel.Hotels.nearbyHotels(hotelId),
            {
              headers: {
                Authorization: `Bearer ${ctx.serviceToken}`,
              },
            },
            params
          )
          if (!apiResponse.ok) {
            await metricsNearbyHotels.httpError(apiResponse)
            return null
          }

          const apiJson = await apiResponse.json()
          const validateHotelData = getNearbyHotelIdsSchema.safeParse(apiJson)
          if (!validateHotelData.success) {
            metricsNearbyHotels.validationError(validateHotelData.error)
            throw badRequestError()
          }

          metricsNearbyHotels.success()

          return validateHotelData.data.map((id: string) => parseInt(id, 10))
        },
        env.CACHE_TIME_HOTELS
      )
    }),
  locations: locationsRouter,
  map: router({
    city: serviceProcedure
      .input(cityCoordinatesInputSchema)
      .query(async function ({ input }) {
        const apiKey = process.env.GOOGLE_STATIC_MAP_KEY
        const { city, hotel } = input

        async function fetchCoordinates(address: string) {
          const cacheClient = await getCacheClient()
          return await cacheClient.cacheOrGet(
            `coordinates:${address}`,
            async function () {
              const url = `https://maps.googleapis.com/maps/api/geocode/json?address=${encodeURIComponent(address)}&key=${apiKey}`
              const response = await fetch(url, {
                signal: AbortSignal.timeout(15_000),
              })
              const data = await response.json()

              if (data.status !== "OK") {
                hotelQueryLogger.error(`Geocode error: ${data.status}`)
                return null
              }

              const location = data.results[0]?.geometry?.location
              if (!location) {
                hotelQueryLogger.error("No location found in geocode response")
                return null
              }

              return location
            },
            "1d"
          )
        }

        let location = await fetchCoordinates(city)
        if (!location) {
          location = await fetchCoordinates(`${city}, ${hotel.address}`)
        }

        if (!location) {
          throw new Error("Unable to fetch coordinates")
        }

        return location
      }),
  }),
  meetingRooms: safeProtectedServiceProcedure
    .input(getMeetingRoomsInputSchema)
    .query(async function ({ ctx, input }) {
      const { hotelId, language } = input

      const params: Record<string, string | string[]> = {
        hotelId,
        language,
      }
      const meetingRoomsCounter = createCounter("trpc.hotel", "meetingRooms")
      const metricsMeetingRooms = meetingRoomsCounter.init({
        params,
      })

      metricsMeetingRooms.start()

      const cacheClient = await getCacheClient()
      return cacheClient.cacheOrGet(
        `${language}:hotels:meetingRooms:${hotelId}`,
        async () => {
          const apiResponse = await api.get(
            api.endpoints.v1.Hotel.Hotels.meetingRooms(input.hotelId),
            {
              headers: {
                Authorization: `Bearer ${ctx.serviceToken}`,
              },
            },
            params
          )

          if (!apiResponse.ok) {
            if (apiResponse.status === 404) {
              // This is expected when the hotel does not have meeting rooms
              metricsMeetingRooms.success()
              return []
            }

            await metricsMeetingRooms.httpError(apiResponse)
            throw new Error("Failed to fetch meeting rooms", {
              cause: apiResponse,
            })
          }

          const apiJson = await apiResponse.json()
          const validatedMeetingRooms = meetingRoomsSchema.safeParse(apiJson)

          if (!validatedMeetingRooms.success) {
            metricsMeetingRooms.validationError(validatedMeetingRooms.error)
            throw badRequestError()
          }

          metricsMeetingRooms.success()

          return validatedMeetingRooms.data.data.sort(
            (a, b) => a.attributes.sortOrder - b.attributes.sortOrder
          )
        },
        env.CACHE_TIME_HOTELS
      )
    }),
  additionalData: safeProtectedServiceProcedure
    .input(getAdditionalDataInputSchema)
    .query(async function ({ ctx, input }) {
      const { hotelId, language } = input

      const params: Record<string, string | string[]> = {
        hotelId,
        language,
      }

      const additionalDataCounter = createCounter(
        "trpc.hotel",
        "additionalData"
      )
      const metricsAdditionalData = additionalDataCounter.init({
        params,
      })

      metricsAdditionalData.start()

      const cacheClient = await getCacheClient()
      return cacheClient.cacheOrGet(
        `${language}:hotels:additionalData:${hotelId}`,
        async () => {
          const apiResponse = await api.get(
            api.endpoints.v1.Hotel.Hotels.additionalData(input.hotelId),
            {
              headers: {
                Authorization: `Bearer ${ctx.serviceToken}`,
              },
            },
            params
          )

          if (!apiResponse.ok) {
            await metricsAdditionalData.httpError(apiResponse)
            throw new Error("Unable to fetch additional data for hotel")
          }

          const apiJson = await apiResponse.json()
          const validatedAdditionalData =
            additionalDataSchema.safeParse(apiJson)

          if (!validatedAdditionalData.success) {
            metricsAdditionalData.validationError(validatedAdditionalData.error)
            throw badRequestError()
          }

          metricsAdditionalData.success()

          return validatedAdditionalData.data
        },
        env.CACHE_TIME_HOTELS
      )
    }),
  packages: router({
    get: serviceProcedure
      .input(roomPackagesInputSchema)
      .query(async ({ ctx, input }) => {
        return getPackages(input, ctx.serviceToken)
      }),
    breakfast: safeProtectedServiceProcedure
      .input(breakfastPackageInputSchema)
      .query(async function ({ ctx, input }) {
        const { lang } = ctx

        const apiLang = toApiLang(lang)
        const params = {
          Adults: input.adults,
          EndDate: dt(input.toDate).format("YYYY-MM-DD"),
          StartDate: dt(input.fromDate).format("YYYY-MM-DD"),
          language: apiLang,
        }

        const breakfastCounter = createCounter(
          "trpc.hotel.packages",
          "breakfast"
        )
        const metricsBreakfast = breakfastCounter.init({
          params,
          hotelId: input.hotelId,
        })

        metricsBreakfast.start()

        const cacheClient = await getCacheClient()
        const breakfastPackages = await cacheClient.cacheOrGet(
          `${apiLang}:adults${input.adults}:startDate:${params.StartDate}:endDate:${params.EndDate}:hotel:${input.hotelId}`,
          async () => {
            const apiResponse = await api.get(
              api.endpoints.v1.Package.Breakfast.hotel(input.hotelId),
              {
                headers: {
                  Authorization: `Bearer ${ctx.serviceToken}`,
                },
              },
              params
            )

            if (!apiResponse.ok) {
              await metricsBreakfast.httpError(apiResponse)
              throw new Error("Unable to fetch breakfast packages")
            }

            const apiJson = await apiResponse.json()
            const breakfastPackages = breakfastPackagesSchema.safeParse(apiJson)
            if (!breakfastPackages.success) {
              metricsBreakfast.validationError(breakfastPackages.error)
              throw new Error("Unable to parse breakfast packages")
            }

            return breakfastPackages.data
          },
          "1h"
        )
        // Since the BRF0 package is out of scope for release we'll disable this handling
        // of membership levels for now, to be reanabled once needed

        // if (ctx.session?.token) {
        //   const apiUser = await getVerifiedUser({ session: ctx.session })
        //   if (apiUser && !("error" in apiUser)) {
        //     const user = parsedUser(apiUser.data, false)
        //     if (
        //       user.membership &&
        //       ["L6", "L7"].includes(user.membership.membershipLevel)
        //     ) {
        //       const freeBreakfastPackage = breakfastPackages.find(
        //         (pkg) => pkg.code === BreakfastPackageEnum.FREE_MEMBER_BREAKFAST
        //       )
        //       if (freeBreakfastPackage?.localPrice) {
        //         return [freeBreakfastPackage]
        //       }
        //     }
        //   }
        // }

        metricsBreakfast.success()

        return breakfastPackages.filter(
          (pkg) => pkg.code !== BreakfastPackageEnum.FREE_MEMBER_BREAKFAST
        )
      }),
    ancillary: safeProtectedServiceProcedure
      .input(ancillaryPackageInputSchema)
      .query(async function ({ ctx, input }) {
        const { lang } = ctx

        const apiLang = toApiLang(lang)
        const params = {
          EndDate: dt(input.toDate).format("YYYY-MM-DD"),
          StartDate: dt(input.fromDate).format("YYYY-MM-DD"),
          language: apiLang,
        }

        const ancillaryCounter = createCounter(
          "trpc.hotel.packages",
          "ancillary"
        )
        const metricsAncillary = ancillaryCounter.init({
          params,
          hotelId: input.hotelId,
        })

        metricsAncillary.start()

        const cacheClient = await getCacheClient()
        const result = await cacheClient.cacheOrGet(
          `${apiLang}:hotel:${input.hotelId}:ancillaries:startDate:${params.StartDate}:endDate:${params.EndDate}`,
          async () => {
            const apiResponse = await api.get(
              api.endpoints.v1.Package.Ancillary.hotel(input.hotelId),
              {
                headers: {
                  Authorization: `Bearer ${ctx.serviceToken}`,
                },
              },
              params
            )

            if (!apiResponse.ok) {
              await metricsAncillary.httpError(apiResponse)
              return null
            }

            const apiJson = await apiResponse.json()
            const ancillaryPackages = ancillaryPackagesSchema.safeParse(apiJson)
            if (!ancillaryPackages.success) {
              metricsAncillary.validationError(ancillaryPackages.error)
              return null
            }

            return ancillaryPackages.data
          },
          "1h"
        )

        metricsAncillary.success()

        return result
      }),
  }),
})