import { LRUCache } from 'lru-cache'
import { usePageDataStore } from '#layers/stores/usePageDataStore'
import { useLoadingStore } from '#layers/stores/useLoadingStore'
import { commonFetch } from '#layers/utils/apiUtil'
import { getGameDomain, getPathAfterLanguage } from '#layers/utils/urlUtil'
import { DEFAULT_LOCALE_CODE } from '@/i18n.config'
import type { PageDataResponse } from '#layers/types/api/pageData'

/** 페이지 데이터 API 응답 LRU */
const pageDataResponseCache = new LRUCache<string, PageDataResponse>({
  max: 100,
  ttl: 1000 * 60,
})

export default defineNuxtRouteMiddleware(async (to, _from) => {
  const runtimeConfig = useRuntimeConfig()

  // error 페이지는 실행X -----
  if (to.path.includes('/error')) {
    return abortNavigation(
      createError({
        statusCode: 404,
        statusMessage: 'error page',
      })
    )
  }

  // inspection 페이지는 실행X -----
  if (to.path.includes('/inspection')) return

  const event = useRequestEvent()
  const gameDataStore = useGameDataStore()
  const pageDataStore = usePageDataStore()
  const loadingStore = useLoadingStore()

  const { currentLangCode: currentLangCodeRef } = storeToRefs(gameDataStore)

  const currentLangCode = currentLangCodeRef.value || DEFAULT_LOCALE_CODE
  const stoveApiServerBaseUrl = runtimeConfig.public.stoveApiUrlServer
  const stoveApiBaseUrl = runtimeConfig.public.stoveApiUrl
  const stoveApiOrigin = import.meta.server
    ? stoveApiServerBaseUrl
    : stoveApiBaseUrl
  const gameDomain = getGameDomain(event ?? undefined)
  const pathWithoutLocale = getPathAfterLanguage(to.path)
  let pageDataResponse: PageDataResponse | null = null

  try {
    // 페이지 이동 시 로딩 상태 시작
    loadingStore.startFullLoading()

    let queryParams: Record<string, string>
    let apiUrl: string

    if (pathWithoutLocale === '/preview') {
      // 미리보기 쿼리스트링에서 파라미터 값 추출
      // preview?page_seq=1&page_ver=1&lang_code=ko
      const queryString = to.fullPath.includes('?')
        ? to.fullPath.split('?')[1]
        : ''
      const urlParams = new URLSearchParams(queryString)
      const pageSeq = urlParams.get('page_seq') || ''
      const pageVer = urlParams.get('page_ver') || ''
      const queryLangCode = urlParams.get('lang_code') || currentLangCode

      apiUrl = `${stoveApiOrigin}/pub-comm/v1.0/template/page/preview`
      queryParams = {
        lang_code: queryLangCode,
        page_seq: pageSeq,
        page_ver: pageVer,
      }
    } else {
      apiUrl = `${stoveApiOrigin}/pub-comm/v2.0/template/page`
      queryParams = {
        game_domain: gameDomain,
        lang_code: currentLangCode,
        page_url: pathWithoutLocale,
      }
    }

    const cacheKey = `${apiUrl}:${JSON.stringify(queryParams)}`
    const cached = pageDataResponseCache.get(cacheKey)
    if (cached) {
      pageDataResponse = cached
    } else {
      pageDataResponse = (await commonFetch('GET', apiUrl, {
        query: queryParams,
      })) as PageDataResponse | null
      if (pageDataResponse?.code === 0 && 'value' in pageDataResponse) {
        pageDataResponseCache.set(cacheKey, pageDataResponse)
      }
    }

    if (import.meta.dev) {
      console.log('🚀 ~ pageData.global response:', pageDataResponse)
    }
  } catch (error) {
    pageDataStore.clearPageData()
    console.error(error)
    return abortNavigation(
      createError({
        statusCode: error.statusCode,
        statusMessage: error.message,
        fatal: true,
        data: { reason: 'post-not-found' },
      })
    )
  }

  if (pageDataResponse?.code === 0 && 'value' in pageDataResponse) {
    pageDataStore.clearPageData()
    pageDataStore.setPageData(pageDataResponse.value)
  } else {
    pageDataStore.clearPageData()
    // 90001 (API Respond 4xx status): API 응답 4xx 에러
    // 91001 (Invalid GameCode): 게임 코드 없음
    // 91003 (Invalid PageUrl): 페이지 주소 없음
    if (
      pageDataResponse?.code === 90001 ||
      pageDataResponse?.code === 91001 ||
      pageDataResponse?.code === 91003
    ) {
      return abortNavigation(
        createError({
          statusCode: 404,
          fatal: true,
          statusMessage: pageDataResponse?.message,
          data: { reason: 'post-not-found' },
        })
      )
    }
    // 91002 (Invalid LangCode): 미지원 언어로 접근
    if (pageDataResponse?.code === 91002) {
      // 이미 /home 경로에 있으면 무한 리다이렉트 방지
      if (pathWithoutLocale === '/home') {
        return abortNavigation(
          createError({
            statusCode: 404,
            statusMessage: pageDataResponse?.message,
            fatal: true,
            data: {
              reason: 'invalid-lang-code',
            },
          })
        )
      }
      return navigateTo(`/${currentLangCode}/home`, { external: true })
    }

    // [TODO]
    // 90004 (Not found user): 사용자 없음
    // if (pageDataResponse?.code === 90043) {
    //   return navigateTo(`/${langCode}/home`)
    // }
  }
})