package fms

import (
	"context"
	"encoding/json"
	"fmt"
	jsoniter "github.com/json-iterator/go"
	"hongze/fms_api/global"
	"hongze/fms_api/models/fms"
	"hongze/fms_api/services/alarm_msg"
	"hongze/fms_api/utils"
	"strconv"
	"time"
)

const (
	CurrencyRateApiHost        = "https://jisuhuilv.market.alicloudapi.com"
	CurrencyRateExchangeSingle = "/exchange/single"
	CurrencyRateApiAppCode     = "22553c4ba74545568aba70ac6cfd441d"
	CurrencyRateApiAppKey      = "203889624"
	CurrencyRateApiAppSecret   = "voampGGl0yGNx5xA1sZdmZlV2EiBct2P"
)

type CurrencyRateApiResp struct {
	Status int    `json:"status"`
	Msg    string `json:"msg"`
	Result struct {
		Currency string `json:"currency"`
		Name     string `json:"name"`
		List     map[string]struct {
			Name       string `json:"name"`
			Rate       string `json:"rate"`
			UpdateTime string `json:"updatetime"`
		} `json:"list"`
	} `json:"result"`
}

type CurrencyRateItem struct {
	Name       string    `json:"name"`
	Code       string    `json:"code"`
	Rate       float64   `json:"rate"`
	UpdateTime time.Time `json:"update_time"`
}

// CurlCurrencyRateApi 请求货币汇率接口
func CurlCurrencyRateApi() (resList []*CurrencyRateItem, err error) {
	defer func() {
		if err != nil {
			go alarm_msg.SendAlarmMsg("请求汇率接口失败, Err: "+err.Error(), 3)
		}
	}()

	// 请求汇率接口
	query := "?currency=CNY"
	reqUrl := fmt.Sprint(CurrencyRateApiHost, CurrencyRateExchangeSingle, query)
	auth := fmt.Sprintf("APPCODE %s", CurrencyRateApiAppCode)
	resultByte, e := utils.PublicGetRequest(reqUrl, auth)
	if e != nil {
		err = fmt.Errorf("HttpCurrencyRateApi errMsg: %s", e.Error())
		return
	}
	if len(resultByte) == 0 {
		err = fmt.Errorf("HttpCurrencyRateApi empty data")
		return
	}

	// 汇率结果
	results := new(CurrencyRateApiResp)
	if e := json.Unmarshal(resultByte, &results); e != nil {
		err = fmt.Errorf("rate api result unmarshal err: %s", e.Error())
		return
	}
	if results.Status != 0 {
		err = fmt.Errorf("curl rate api errMsg: %s", results.Msg)
		return
	}
	list := results.Result.List
	if list == nil {
		err = fmt.Errorf("rate api list is empty")
		return
	}
	resList = make([]*CurrencyRateItem, 0)
	for k, v := range list {
		item := new(CurrencyRateItem)
		item.Code = k
		item.Name = v.Name
		f, e := strconv.ParseFloat(v.Rate, 64)
		if e != nil {
			err = fmt.Errorf("rate api rate parse err: %v", e)
			return
		}
		item.Rate = f
		t, e := time.ParseInLocation(utils.FormatDateTime, v.UpdateTime, time.Local)
		if e != nil {
			global.LOG.Errorf("rate api time parse err:", e)
			continue
		}
		item.UpdateTime = t
		resList = append(resList, item)
	}
	return
}

// GetTodayCurrencyRateList 获取今日货币及汇率列表
func GetTodayCurrencyRateList() (list []*fms.CurrencyUnitItem, err error) {
	list = make([]*fms.CurrencyUnitItem, 0)
	// 货币列表
	ob := new(fms.CurrencyUnit)
	cond := `enable = 1`
	pars := make([]interface{}, 0)
	currencyList, e := ob.List(cond, pars)
	if e != nil {
		err = fmt.Errorf("获取货币列表失败, Err: %s", e.Error())
		return
	}

	rateMap := make(map[string]float64)
	rateList := make([]*CurrencyRateItem, 0)

	// 读取缓存
	cacheJson, _ := global.Redis.Get(context.TODO(), utils.CACHE_KEY_CURRENCY_RMB_RATE).Result()
	if cacheJson != "" {
		if e = jsoniter.UnmarshalFromString(cacheJson, &rateList); e != nil {
			err = fmt.Errorf("解析汇率缓存数据失败, Err: %s", e.Error())
			return
		}
	}

	// 请求汇率接口
	if cacheJson == "" {
		rateList, e = CurlCurrencyRateApi()
		if e != nil {
			err = fmt.Errorf("请求汇率接口失败, Err: %s", e.Error())
			return
		}
		if len(rateList) == 0 {
			err = fmt.Errorf("汇率接口返回数据为空")
			return
		}
		newCache, e := jsoniter.MarshalToString(rateList)
		if e != nil {
			err = fmt.Errorf("写入汇率缓存失败, Err: %s", e.Error())
			return
		}
		now := time.Now()
		todayLast := time.Date(now.Year(), now.Month(), now.Day(), 23, 59, 59, 0, time.Local)
		sub := todayLast.Sub(now)
		_ = global.Redis.SetEX(context.TODO(), utils.CACHE_KEY_CURRENCY_RMB_RATE, newCache, sub)
	}

	for i := range rateList {
		rateMap[rateList[i].Code] = rateList[i].Rate
	}
	for i := range currencyList {
		r := rateMap[currencyList[i].Code]
		if currencyList[i].Code == fms.BaseCurrencyCode {
			r = 1
		}
		list = append(list, &fms.CurrencyUnitItem{
			Name:     currencyList[i].Name,
			UnitName: currencyList[i].UnitName,
			Code:     currencyList[i].Code,
			Enable:   currencyList[i].Enable,
			RMBRate:  r,
			FlagImg:  currencyList[i].FlagImg,
		})
	}
	return
}