import {
  getUnixTime,
  startOfDay,
  endOfDay,
  differenceInMonths,
} from '@seed-next/date'

import type {
  ReqCouponUseParams,
  ReqCouponUse,
  ResCouponUse,
  ResCouponList,
  ResCouponListItem,
  ReqCouponList,
  ReqCouponListParams,
} from '#layers/types/api/couponData'

/**
 * 쿠폰 관련 Composable 함수입니다.
 * @returns
 */
export const useCoupon = () => {
  // Refs
  const couponList = ref<Array<ResCouponListItem> | null>([])
  const totalCount = ref<number>(0)
  const hasNoCouponList = ref<boolean>(true)

  /**
   * 쿠폰 등록 내역 데이터를 세팅합니다.
   * @param {ResCouponList} newValue - 쿠폰 등록 내역 데이터
   * @returns
   */
  const setCouponList = (newValue: ResCouponList) => {
    if (newValue.value.total_count === 0) {
      hasNoCouponList.value = true
      couponList.value = null
      totalCount.value = 0
      return
    } else {
      hasNoCouponList.value = false
      couponList.value = newValue.value.list
      totalCount.value = newValue.value.total_count
    }
  }

  /**
   * 쿠폰 등록 API 호출 함수입니다.
   * @param {ReqCouponUse} req - 쿠폰 등록 API 요청 데이터
   * @returns {ResCouponUse} res - 쿠폰 등록 API 응답 데이터
   */
  const postCouponUse = async (req: ReqCouponUse) => {
    let res: ResCouponUse = {} as ResCouponUse
    try {
      const runtimeConfig = useRuntimeConfig()
      const stoveApiUrl = runtimeConfig.public.stoveApiUrl
      const userTokenType = req.user_token_type || 'web'

      const headers = {
        Authorization: `Bearer ${req.accessToken}`,
      }
      const query: ReqCouponUseParams = {
        game_code: req.game_code || '',
        coupon_no: req.coupon_no || '',
        client_ipaddr: req.client_ipaddr || '',
        world_no: req.world_no || '',
        character_no: req.character_no || '',
      }

      const apiUrl = `${stoveApiUrl}/coupon/v3.0/${userTokenType}/coupon/use`

      res = (await commonFetch('POST', apiUrl, {
        headers,
        query,
      })) as ResCouponUse

      return res
    } catch (error) {
      console.error('[Exception] useCoupon.postCouponUse:', error)
    }
  }

  /**
   * 쿠폰 등록 내역 API 호출 함수입니다.
   * @param {ReqCouponList} req - 쿠폰 등록 내역 API 요청 데이터
   * @returns {ResCouponList} res - 쿠폰 등록 내역 API 응답 데이터
   */
  const getCouponList = async (req: ReqCouponList) => {
    let res: ResCouponList = {} as ResCouponList
    try {
      const runtimeConfig = useRuntimeConfig()
      const stoveApiUrl = runtimeConfig.public.stoveApiUrl
      const userTokenType = req.user_token_type || 'web'

      const headers = {
        Authorization: `Bearer ${req.accessToken}`,
      }
      const query: ReqCouponListParams = {
        game_code: req.game_code,
        start_date: req.start_date,
        end_date: req.end_date,
        use_state_code: req.use_state_code,
        page_size: req.page_size,
        page_no: req.page_no,
        lang_code: req.lang_code,
      }

      const apiUrl = `${stoveApiUrl}/coupon/v3.0/${userTokenType}/couponbox/list`

      res = (await commonFetch('GET', apiUrl, {
        headers,
        query,
      })) as ResCouponList

      if (res.result === '000') {
        setCouponList(res)
      } else {
        console.error('[Exception] useCoupon.getCouponList:', res.message)
      }
    } catch (error) {
      console.error('[Exception] useCoupon.getCouponList:', error)
    }

    return res
  }

  return {
    couponList,
    totalCount,
    hasNoCouponList,

    postCouponUse,
    getCouponList,
  }
}

/**
 * 쿠폰 조회 관련 Composable 함수입니다.
 * @returns
 */
export const useCouponDate = () => {
  // Refs
  const startDate = ref<Date | null>(null)
  const endDate = ref<Date | null>(null)
  const searchStatus = ref<number>(0) // 0: 전체, 1: 사용전, 2: 사용완료/기간만료/사용마감

  // Computed
  const currentSearchPeriod = computed(() => {
    if (!startDate.value || !endDate.value) {
      return 0
    }

    return differenceInMonths(endDate.value, startDate.value)
  })

  // Setting Functions
  const setCouponDate = (newDate: Date, type: 'start' | 'end') => {
    if (newDate === null) {
      return
    }

    if (type === 'start') {
      startDate.value = newDate
    } else {
      endDate.value = newDate
    }
  }

  const setSearchStatus = (newStatus: number) => {
    searchStatus.value = newStatus
  }

  // Unix(초) 단위 타임스탬프 변환 (해당 날짜의 시작/종료 시간)
  const toUnixTimestamp = (date: Date, type: 'start' | 'end') => {
    if (date === null) {
      return
    }

    if (type === 'start') {
      return getUnixTime(startOfDay(date))
    } else {
      return getUnixTime(endOfDay(date))
    }
  }

  return {
    startDate,
    endDate,
    currentSearchPeriod,
    searchStatus,

    toUnixTimestamp,
    setCouponDate,
    setSearchStatus,
  }
}

/**
 * 쿠폰 페이징 관련 Composable 함수입니다.
 * @returns
 */
export const useCouponPaging = () => {
  const pageNo = ref(1) // 현재 페이지 번호
  const pageSize = ref(20) // 페이지 사이즈
  const pageBlock = ref(10) // 페이지 블록 사이즈

  const updatePagination = (no: number) => {
    pageNo.value = no
  }

  const getPageBlock = (deviceMode: string) => {
    return deviceMode === 'desktop' ? pageBlock.value : 5
  }

  return {
    pageNo,
    pageSize,
    pageBlock,

    updatePagination,
    getPageBlock,
  }
}