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

import { notFoundError } from "../../../errors"
import { GetCollectionPageRefs } from "../../../graphql/Query/CollectionPage/CollectionPage.graphql"
import { request } from "../../../graphql/request"
import {
  CollectionPageEnum,
  type CollectionPageRefs,
  type GetCollectionPageRefsSchema,
} from "../../../types/collectionPage"
import {
  generateRefsResponseTag,
  generateTag,
  generateTagsFromAssetSystem,
  generateTagsFromSystem,
} from "../../../utils/generateTag"
import { collectionPageRefsSchema } from "./output"

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

import type { AssetSystem, System } from "../schemas/system"

export async function fetchCollectionPageRefs(lang: Lang, uid: string) {
  const getCollectionPageRefsCounter = createCounter(
    "trpc.contentstack.collectionPage.get.refs"
  )
  const metricsGetCollectionPageRefs = getCollectionPageRefsCounter.init({
    lang,
    uid,
  })

  metricsGetCollectionPageRefs.start()

  const cacheKey = generateRefsResponseTag(lang, uid)
  const variables = {
    locale: lang,
    uid,
  }
  const refsResponse = await request<GetCollectionPageRefsSchema>(
    GetCollectionPageRefs,
    variables,
    {
      key: cacheKey,
      ttl: "max",
    }
  )

  if (!refsResponse.data) {
    metricsGetCollectionPageRefs.noDataError()
    throw notFoundError({
      message: "GetCollectionPageRefs returned no data",
      errorDetails: variables,
    })
  }

  return refsResponse.data
}

export function validateCollectionPageRefs(
  data: GetCollectionPageRefsSchema,
  lang: Lang,
  uid: string
) {
  const getCollectionPageRefsCounter = createCounter(
    "trpc.contentstack.collectionPage.get.refs"
  )
  const metricsGetCollectionPageRefs = getCollectionPageRefsCounter.init({
    lang,
    uid,
  })

  const validatedData = collectionPageRefsSchema.safeParse(data)
  if (!validatedData.success) {
    metricsGetCollectionPageRefs.validationError(validatedData.error)
    return null
  }

  metricsGetCollectionPageRefs.success()

  return validatedData.data
}

export function generatePageTags(
  validatedData: CollectionPageRefs,
  lang: Lang
): string[] {
  const connections = getConnections(validatedData)
  const assetConnections = getConnectionsFromAssets(validatedData)
  return [
    generateTagsFromSystem(lang, connections),
    generateTagsFromAssetSystem(assetConnections),
    generateTag(lang, validatedData.collection_page.system.uid),
  ].flat()
}

export function getConnectionsFromAssets({
  collection_page,
}: CollectionPageRefs) {
  const connections: AssetSystem["system"][] = []

  if (collection_page.hero_video?.sourceConnection.edges[0]) {
    connections.push(
      collection_page.hero_video.sourceConnection.edges[0].node.system
    )
  }

  if (collection_page.blocks) {
    collection_page.blocks.forEach((block) => {
      switch (block.__typename) {
        case CollectionPageEnum.ContentStack.blocks.VideoCard:
          if (block.video_card?.video.sourceConnection.edges[0]) {
            connections.push(
              block.video_card.video.sourceConnection.edges[0].node.system
            )
          }
          break
        case CollectionPageEnum.ContentStack.blocks.Video:
          if (block.video?.sourceConnection.edges[0]) {
            connections.push(block.video.sourceConnection.edges[0].node.system)
          }
          break
        default:
          break
      }
    })
  }

  return connections
}

export function getConnections({ collection_page }: CollectionPageRefs) {
  const connections: System["system"][] = [collection_page.system]
  if (collection_page.blocks) {
    collection_page.blocks.forEach((block) => {
      const typeName = block.__typename
      switch (typeName) {
        case CollectionPageEnum.ContentStack.blocks.Shortcuts:
          if (block.shortcuts.shortcuts.length) {
            connections.push(...block.shortcuts.shortcuts.filter((c) => !!c))
          }
          break
        case CollectionPageEnum.ContentStack.blocks.CardsGrid:
          if (block.cards_grid.length) {
            connections.push(...block.cards_grid)
          }
          break
        case CollectionPageEnum.ContentStack.blocks.UspGrid:
          if (block.usp_grid.length) {
            connections.push(...block.usp_grid.filter((c) => !!c))
          }
          break
        case CollectionPageEnum.ContentStack.blocks.VideoCard:
          if (block.video_card?.system) {
            connections.push(block.video_card.system)
          }
          break
        case CollectionPageEnum.ContentStack.blocks.DynamicContent:
        case CollectionPageEnum.ContentStack.blocks.Video:
          break
        default:
          const _exhaustiveCheck: never = typeName
          break
      }
    })
  }

  return connections
}