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

import { notFound } from "../../../errors"
import { batchRequest } from "../../../graphql/batchRequest"
import {
  GetContentPageBlocksRefs,
  GetContentPageRefs,
} from "../../../graphql/Query/ContentPage/ContentPage.graphql"
import { ContentPageEnum } from "../../../types/contentPage"
import {
  generateRefsResponseTag,
  generateTag,
  generateTagsFromSystem,
} from "../../../utils/generateTag"
import { contentPageRefsSchema } from "./output"

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

import type {
  ContentPageRefs,
  GetContentPageRefsSchema,
} from "../../../types/contentPage"
import type { System } from "../schemas/system"

export async function fetchContentPageRefs(lang: Lang, uid: string) {
  const getContentPageRefsCounter = createCounter(
    "trpc.contentstack",
    "contentPage.get.refs"
  )
  const metricsGetContentPageRefs = getContentPageRefsCounter.init({
    lang,
    uid,
  })

  metricsGetContentPageRefs.start()

  const res = await batchRequest<GetContentPageRefsSchema>([
    {
      document: GetContentPageRefs,
      variables: { locale: lang, uid },
      cacheOptions: {
        key: generateRefsResponseTag(lang, uid),
        ttl: "max",
      },
    },
    {
      document: GetContentPageBlocksRefs,
      variables: { locale: lang, uid },
      cacheOptions: {
        key: generateTag(lang, uid + 1),
        ttl: "max",
      },
    },
  ])
  if (!res.data) {
    const notFoundError = notFound(res)
    metricsGetContentPageRefs.noDataError()
    throw notFoundError
  }

  const validatedData = contentPageRefsSchema.safeParse(res.data)
  if (!validatedData.success) {
    metricsGetContentPageRefs.validationError(validatedData.error)
    return null
  }

  metricsGetContentPageRefs.success()

  return validatedData.data
}

export function generatePageTags(
  validatedData: ContentPageRefs,
  lang: Lang
): string[] {
  const connections = getConnections(validatedData)
  return [
    generateTagsFromSystem(lang, connections),
    generateTag(lang, validatedData.content_page.system.uid),
  ].flat()
}

export function getConnections({ content_page }: ContentPageRefs) {
  const connections: System["system"][] = [content_page.system]
  if (content_page.blocks) {
    content_page.blocks.forEach((block) => {
      switch (block.__typename) {
        case ContentPageEnum.ContentStack.blocks.Accordion: {
          if (block.accordion.length) {
            connections.push(...block.accordion)
          }
          break
        }
        case ContentPageEnum.ContentStack.blocks.Content:
          {
            if (block.content.length) {
              connections.push(...block.content)
            }
          }
          break
        case ContentPageEnum.ContentStack.blocks.CardsGrid: {
          if (block.cards_grid.length) {
            connections.push(...block.cards_grid)
          }
          break
        }
        case ContentPageEnum.ContentStack.blocks.DynamicContent: {
          if (block.dynamic_content.link) {
            connections.push(block.dynamic_content.link)
          }
          break
        }
        case ContentPageEnum.ContentStack.blocks.Shortcuts: {
          if (block.shortcuts.shortcuts.length) {
            connections.push(...block.shortcuts.shortcuts)
          }
          break
        }
        case ContentPageEnum.ContentStack.blocks.TextCols: {
          if (block.text_cols.length) {
            connections.push(...block.text_cols)
          }
          break
        }
        case ContentPageEnum.ContentStack.blocks.UspGrid: {
          if (block.usp_grid.length) {
            connections.push(...block.usp_grid)
          }
          break
        }
        case ContentPageEnum.ContentStack.blocks.CardsGrid: {
          if (block.cards_grid.length) {
            block.cards_grid.forEach((card) => {
              connections.push(card)
            })
          }
          break
        }
      }
    })
  }

  if (content_page.sidebar) {
    content_page.sidebar.forEach((block) => {
      switch (block.__typename) {
        case ContentPageEnum.ContentStack.sidebar.Content:
          if (block.content.length) {
            connections.push(...block.content)
          }
          break
        case ContentPageEnum.ContentStack.sidebar.JoinLoyaltyContact:
          if (block.join_loyalty_contact?.button) {
            connections.push(block.join_loyalty_contact.button)
          }
          break
        case ContentPageEnum.ContentStack.sidebar.ScriptedCard:
          if (block.scripted_card?.length) {
            connections.push(...block.scripted_card)
          }
          break
        case ContentPageEnum.ContentStack.sidebar.TeaserCard:
          if (block.teaser_card?.length) {
            connections.push(...block.teaser_card)
          }
          break
        case ContentPageEnum.ContentStack.sidebar.QuickLinks:
          if (block.shortcuts.shortcuts.length) {
            connections.push(...block.shortcuts.shortcuts)
          }
          break
        default:
          break
      }
    })
  }
  return connections
}