import { type DocumentNode } from "graphql"
import { cache } from "react"

import { createCounter } from "@scandic-hotels/common/telemetry"

import { router } from "../../.."
import { PageContentTypeEnum } from "../../../enums/contentType"
import { notFoundError } from "../../../errors"
import { GetMyPagesBreadcrumbs } from "../../../graphql/Query/Breadcrumbs/AccountPage.graphql"
import { GetCampaignOverviewPageBreadcrumbs } from "../../../graphql/Query/Breadcrumbs/CampaignOverviewPage.graphql"
import { GetCampaignPageBreadcrumbs } from "../../../graphql/Query/Breadcrumbs/CampaignPage.graphql"
import { GetCollectionPageBreadcrumbs } from "../../../graphql/Query/Breadcrumbs/CollectionPage.graphql"
import { GetContentPageBreadcrumbs } from "../../../graphql/Query/Breadcrumbs/ContentPage.graphql"
import { GetDestinationCityPageBreadcrumbs } from "../../../graphql/Query/Breadcrumbs/DestinationCityPage.graphql"
import { GetDestinationCountryPageBreadcrumbs } from "../../../graphql/Query/Breadcrumbs/DestinationCountryPage.graphql"
import { GetDestinationOverviewPageBreadcrumbs } from "../../../graphql/Query/Breadcrumbs/DestinationOverviewPage.graphql"
import { GetHotelPageBreadcrumbs } from "../../../graphql/Query/Breadcrumbs/HotelPage.graphql"
import { GetLoyaltyPageBreadcrumbs } from "../../../graphql/Query/Breadcrumbs/LoyaltyPage.graphql"
import { GetPromoCampaignPageBreadcrumbs } from "../../../graphql/Query/Breadcrumbs/PromoCampaignPage.graphql"
import { request } from "../../../graphql/request"
import { contentstackExtendedProcedureUID } from "../../../procedures"
import { generateTag } from "../../../utils/generateTag"
import { breadcrumbsSchema } from "./output"

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

import type { RawBreadcrumbsSchema } from "../../../types/breadcrumbs"

interface BreadcrumbsPageData<T> {
  dataKey: keyof T
  query: string | DocumentNode
}

const getBreadcrumbs = cache(async function fetchMemoizedBreadcrumbs<T>(
  { dataKey, query }: BreadcrumbsPageData<T>,
  { uid, lang }: { uid: string; lang: Lang }
) {
  const getBreadcrumbsCounter = createCounter(
    "trpc.contentstack.breadcrumbs.get"
  )
  const metricsGetBreadcrumbs = getBreadcrumbsCounter.init({
    lang,
    uid,
  })

  metricsGetBreadcrumbs.start()

  const variables = { locale: lang, uid }
  const response = await request<T>(query, variables, {
    key: generateTag(lang, uid),
    ttl: "max",
  })

  if (!response.data) {
    metricsGetBreadcrumbs.noDataError()

    throw notFoundError({
      message: "Breadcrumbs query returned no data",
      errorDetails: variables,
    })
  }

  const validatedBreadcrumbs = breadcrumbsSchema.safeParse(
    response.data[dataKey]
  )

  if (!validatedBreadcrumbs.success) {
    metricsGetBreadcrumbs.validationError(validatedBreadcrumbs.error)
    return []
  }

  metricsGetBreadcrumbs.success()

  return validatedBreadcrumbs.data
})

export const breadcrumbsQueryRouter = router({
  get: contentstackExtendedProcedureUID.query(async ({ ctx }) => {
    const variables = {
      lang: ctx.lang,
      uid: ctx.uid,
    }

    switch (ctx.contentType) {
      case PageContentTypeEnum.accountPage:
        return await getBreadcrumbs<{
          account_page: RawBreadcrumbsSchema
        }>(
          {
            dataKey: "account_page",
            query: GetMyPagesBreadcrumbs,
          },
          variables
        )
      case PageContentTypeEnum.campaignOverviewPage:
        return await getBreadcrumbs<{
          campaign_overview_page: RawBreadcrumbsSchema
        }>(
          {
            dataKey: "campaign_overview_page",
            query: GetCampaignOverviewPageBreadcrumbs,
          },
          variables
        )
      case PageContentTypeEnum.campaignPage:
        return await getBreadcrumbs<{
          campaign_page: RawBreadcrumbsSchema
        }>(
          {
            dataKey: "campaign_page",
            query: GetCampaignPageBreadcrumbs,
          },
          variables
        )
      case PageContentTypeEnum.collectionPage:
        return await getBreadcrumbs<{
          collection_page: RawBreadcrumbsSchema
        }>(
          {
            dataKey: "collection_page",
            query: GetCollectionPageBreadcrumbs,
          },
          variables
        )
      case PageContentTypeEnum.contentPage:
        return await getBreadcrumbs<{
          content_page: RawBreadcrumbsSchema
        }>(
          {
            dataKey: "content_page",
            query: GetContentPageBreadcrumbs,
          },
          variables
        )
      case PageContentTypeEnum.destinationOverviewPage:
        return await getBreadcrumbs<{
          destination_overview_page: RawBreadcrumbsSchema
        }>(
          {
            dataKey: "destination_overview_page",
            query: GetDestinationOverviewPageBreadcrumbs,
          },
          variables
        )
      case PageContentTypeEnum.destinationCountryPage:
        return await getBreadcrumbs<{
          destination_country_page: RawBreadcrumbsSchema
        }>(
          {
            dataKey: "destination_country_page",
            query: GetDestinationCountryPageBreadcrumbs,
          },
          variables
        )
      case PageContentTypeEnum.destinationCityPage:
        return await getBreadcrumbs<{
          destination_city_page: RawBreadcrumbsSchema
        }>(
          {
            dataKey: "destination_city_page",
            query: GetDestinationCityPageBreadcrumbs,
          },
          variables
        )
      case PageContentTypeEnum.hotelPage:
        return await getBreadcrumbs<{
          hotel_page: RawBreadcrumbsSchema
        }>(
          {
            dataKey: "hotel_page",
            query: GetHotelPageBreadcrumbs,
          },
          variables
        )
      case PageContentTypeEnum.loyaltyPage:
        return await getBreadcrumbs<{
          loyalty_page: RawBreadcrumbsSchema
        }>(
          {
            dataKey: "loyalty_page",
            query: GetLoyaltyPageBreadcrumbs,
          },
          variables
        )
      case PageContentTypeEnum.promoCampaignPage:
        return await getBreadcrumbs<{
          promo_campaign_page: RawBreadcrumbsSchema
        }>(
          {
            dataKey: "promo_campaign_page",
            query: GetPromoCampaignPageBreadcrumbs,
          },
          variables
        )
      default:
        return []
    }
  }),
})