import { metrics } from "@opentelemetry/api"

import { Lang } from "@/constants/languages"
import { baseUrls } from "@/constants/routes/baseUrls"
import { batchRequest } from "@/lib/graphql/batchRequest"
import {
  GetDaDeEnUrlsAccountPage,
  GetFiNoSvUrlsAccountPage,
} from "@/lib/graphql/Query/AccountPage/AccountPage.graphql"
import {
  GetDaDeEnUrlsCollectionPage,
  GetFiNoSvUrlsCollectionPage,
} from "@/lib/graphql/Query/CollectionPage/CollectionPage.graphql"
import {
  GetDaDeEnUrlsContentPage,
  GetFiNoSvUrlsContentPage,
} from "@/lib/graphql/Query/ContentPage/ContentPage.graphql"
import {
  GetDaDeEnUrlsCurrentBlocksPage,
  GetFiNoSvUrlsCurrentBlocksPage,
} from "@/lib/graphql/Query/Current/LanguageSwitcher.graphql"
import {
  GetDaDeEnUrlsDestinationCityPage,
  GetFiNoSvUrlsDestinationCityPage,
} from "@/lib/graphql/Query/DestinationCityPage/DestinationCityPage.graphql"
import {
  GetDaDeEnUrlsDestinationCountryPage,
  GetFiNoSvUrlsDestinationCountryPage,
} from "@/lib/graphql/Query/DestinationCountryPage/DestinationCountryPage.graphql"
import {
  GetDaDeEnUrlsDestinationOverviewPage,
  GetFiNoSvUrlsDestinationOverviewPage,
} from "@/lib/graphql/Query/DestinationOverviewPage/DestinationOverviewPage.graphql"
import {
  GetDaDeEnUrlsHotelPage,
  GetFiNoSvUrlsHotelPage,
} from "@/lib/graphql/Query/HotelPage/HotelPage.graphql"
import {
  GetDaDeEnUrlsLoyaltyPage,
  GetFiNoSvUrlsLoyaltyPage,
} from "@/lib/graphql/Query/LoyaltyPage/LoyaltyPage.graphql"
import {
  GetDaDeEnUrlsStartPage,
  GetFiNoSvUrlsStartPage,
} from "@/lib/graphql/Query/StartPage/StartPage.graphql"
import { internalServerError } from "@/server/errors/trpc"
import { publicProcedure, router } from "@/server/trpc"

import { getUidAndContentTypeByPath } from "@/services/cms/getUidAndContentTypeByPath"
import { generateTag } from "@/utils/generateTag"

import { getLanguageSwitcherInput } from "./input"
import { validateLanguageSwitcherData } from "./output"
import { languageSwitcherAffix } from "./utils"

import { PageContentTypeEnum } from "@/types/requests/contentType"
import type {
  LanguageSwitcherData,
  LanguageSwitcherQueryDataRaw,
} from "@/types/requests/languageSwitcher"

interface LanguageSwitcherVariables {
  contentType: string
  uid: string
}

const meter = metrics.getMeter("trpc.contentstack.languageSwitcher")
const getLanguageSwitcherCounter = meter.createCounter(
  "trpc.contentstack.languageSwitcher.get"
)
const getLanguageSwitcherSuccessCounter = meter.createCounter(
  "trpc.contentstack.languageSwitcher.get-success"
)
const getLanguageSwitcherFailCounter = meter.createCounter(
  "trpc.contentstack.languageSwitcher.get-fail"
)

async function getLanguageSwitcher(options: LanguageSwitcherVariables) {
  const variables = { uid: options.uid }
  const tagsDaDeEn = [
    generateTag(Lang.da, options.uid, languageSwitcherAffix),
    generateTag(Lang.de, options.uid, languageSwitcherAffix),
    generateTag(Lang.en, options.uid, languageSwitcherAffix),
  ]
  const tagsFiNoSv = [
    generateTag(Lang.fi, options.uid, languageSwitcherAffix),
    generateTag(Lang.no, options.uid, languageSwitcherAffix),
    generateTag(Lang.sv, options.uid, languageSwitcherAffix),
  ]
  let daDeEnDocument = null
  let fiNoSvDocument = null
  switch (options.contentType) {
    case PageContentTypeEnum.accountPage:
      daDeEnDocument = GetDaDeEnUrlsAccountPage
      fiNoSvDocument = GetFiNoSvUrlsAccountPage
      break
    case PageContentTypeEnum.currentBlocksPage:
      daDeEnDocument = GetDaDeEnUrlsCurrentBlocksPage
      fiNoSvDocument = GetFiNoSvUrlsCurrentBlocksPage
      break
    case PageContentTypeEnum.loyaltyPage:
      daDeEnDocument = GetDaDeEnUrlsLoyaltyPage
      fiNoSvDocument = GetFiNoSvUrlsLoyaltyPage
      break
    case PageContentTypeEnum.hotelPage:
      daDeEnDocument = GetDaDeEnUrlsHotelPage
      fiNoSvDocument = GetFiNoSvUrlsHotelPage
      break
    case PageContentTypeEnum.contentPage:
      daDeEnDocument = GetDaDeEnUrlsContentPage
      fiNoSvDocument = GetFiNoSvUrlsContentPage
      break
    case PageContentTypeEnum.collectionPage:
      daDeEnDocument = GetDaDeEnUrlsCollectionPage
      fiNoSvDocument = GetFiNoSvUrlsCollectionPage
      break
    case PageContentTypeEnum.destinationOverviewPage:
      daDeEnDocument = GetDaDeEnUrlsDestinationOverviewPage
      fiNoSvDocument = GetFiNoSvUrlsDestinationOverviewPage
      break
    case PageContentTypeEnum.destinationCountryPage:
      daDeEnDocument = GetDaDeEnUrlsDestinationCountryPage
      fiNoSvDocument = GetFiNoSvUrlsDestinationCountryPage
      break
    case PageContentTypeEnum.destinationCityPage:
      daDeEnDocument = GetDaDeEnUrlsDestinationCityPage
      fiNoSvDocument = GetFiNoSvUrlsDestinationCityPage
      break
    case PageContentTypeEnum.startPage:
      daDeEnDocument = GetDaDeEnUrlsStartPage
      fiNoSvDocument = GetFiNoSvUrlsStartPage
      break
    default:
      console.error(`type: [${options.contentType}]`)
      console.error(`Trying to get a content type that is not supported`)
      throw internalServerError()
  }

  if (daDeEnDocument && fiNoSvDocument) {
    return await batchRequest<LanguageSwitcherQueryDataRaw>([
      {
        document: daDeEnDocument,
        variables,
        options: {
          cache: "force-cache",
          next: {
            tags: tagsDaDeEn,
          },
        },
      },
      {
        document: fiNoSvDocument,
        variables,
        options: {
          cache: "force-cache",
          next: {
            tags: tagsFiNoSv,
          },
        },
      },
    ])
  }

  throw internalServerError()
}

export const languageSwitcherQueryRouter = router({
  get: publicProcedure
    .input(getLanguageSwitcherInput)
    .query(async ({ input, ctx }) => {
      let uid = ctx.uid
      let contentType = ctx.contentType
      let lang = ctx.lang ?? input?.lang

      if (input) {
        const data = await getUidAndContentTypeByPath(input.pathName)
        uid = data.uid
        contentType = data.contentType ?? ctx.contentType
      }

      if (!uid || !lang) {
        return { lang: lang, urls: baseUrls }
      }

      getLanguageSwitcherCounter.add(1, {
        uid: uid,
        lang: lang,
        contentType: contentType,
      })
      console.info(
        "contentstack.languageSwitcher start",
        JSON.stringify({
          query: {
            uid: uid,
            lang: lang,
            contentType: contentType,
          },
        })
      )
      const res = await getLanguageSwitcher({
        contentType: contentType!,
        uid: uid,
      })

      const urls = Object.keys(res.data).reduce<LanguageSwitcherData>(
        (acc, key) => {
          const item = res.data[key as Lang]

          const url = item
            ? item.web?.original_url || `/${key}${item.url}`
            : undefined

          return {
            ...acc,
            [key]: { url, isExternal: !!item?.web?.original_url },
          }
        },
        {} as LanguageSwitcherData
      )

      const validatedLanguageSwitcherData =
        validateLanguageSwitcherData.safeParse(urls)

      if (!validatedLanguageSwitcherData.success) {
        getLanguageSwitcherFailCounter.add(1, {
          uid: uid,
          lang: lang,
          contentType: contentType,
          error_type: "validation_error",
          error: JSON.stringify(validatedLanguageSwitcherData.error),
        })
        console.error(
          "contentstack.languageSwitcher validation error",
          JSON.stringify({
            query: {
              uid: uid,
              lang: lang,
              contentType: contentType,
            },
            error: validatedLanguageSwitcherData.error,
          })
        )
        return null
      }
      getLanguageSwitcherSuccessCounter.add(1, {
        uid: uid,
        lang: lang,
        contentType: contentType,
      })
      console.info(
        "contentstack.languageSwitcher success",
        JSON.stringify({
          query: {
            uid: uid,
            lang: lang,
            contentType: contentType,
          },
        })
      )
      return {
        lang: lang,
        urls,
      }
    }),
})