package middleware

import (
	"fmt"
	"sfbase/global"
	"sfbase/redis"
	sutils "sfbase/utils"
	"sfis/db"
	"sfis/model"
	"sfis/model/response"
	"sfis/utils"
	"strconv"
	"strings"
	"time"

	"github.com/gin-gonic/gin"
	"go.uber.org/zap"
)

const TimestampExpireTime = 600 //单位秒,header里的时间戳超时时间 10分钟

func TokenAuth() gin.HandlerFunc {
	return func(context *gin.Context) {
		var (
			requestUrl string
			token      string
			timestamp  string
			appID      string
			productID  int
			requestIP  string
		)
		requestUrl = context.Request.URL.String()
		global.Logger.Info(requestUrl)
		requestUrl = strings.Split(requestUrl, "v1")[1]
		global.Logger.Info(requestUrl)
		// a := strings.Split(requestUrl, "/")
		// requestUrl = a[4]
		if p, ok := utils.ApiUrlCache.Load(requestUrl); ok {
			productID = p.(int)
		} else {
			response.FailWithDetailed(response.ParamError, nil, "url错误", context)
			context.Abort()
			return
		}
		// productID = 1000
		token = context.Request.Header.Get("token")
		timestamp = context.Request.Header.Get("timestamp")
		appID = context.PostForm("app_id")

		if appID == "" || token == "" || timestamp == "" {
			response.FailWithDetailed(response.ParamEmpty, nil, "参数缺失或为空", context)
			context.Abort()
			return
		}
		_timestamp, err := strconv.ParseInt(timestamp, 10, 64)
		if err != nil {
			response.FailWithDetailed(response.ParamError, nil, "参数异常", context)
			context.Abort()
			return
		}
		now := time.Now().Unix()
		TimestampExpire := now - _timestamp
		if TimestampExpire < 0 {
			TimestampExpire = -TimestampExpire
		}
		if TimestampExpire > TimestampExpireTime {
			//token时间验证 十分钟
			response.FailWithDetailed(response.TokenExpired, nil, "签名过期", context)
			context.Abort()
			return
		}

		user := utils.GetUserByAppID(appID)
		secretKey := user.SecretKey
		ipWhiteList := user.IpWhiteList
		userName := user.Name
		global.Logger.Info("用户:", zap.Any("userName:", userName), zap.Any("appID:", appID), zap.Any("secretKey:", secretKey), zap.Any("ipWhiteList:", ipWhiteList))
		/**
		第一步:ip白名单校验
		*/
		requestIP = utils.GetIp(context.Request)
		if ipWhiteList != "*" {
			if strings.Index(ipWhiteList, requestIP) < 0 {
				response.FailWithDetailed(response.IpInvalid, nil, "ip不在白名单", context)
				context.Abort()
				return
			}
		}
		/**
		第二步:MD5签名校验
		*/
		signToken := sutils.MD5(fmt.Sprintf("%s%s%s", appID, timestamp, user.SecretKey))
		if token != signToken {
			response.FailWithDetailed(response.TokenInvalid, nil, "身份验证失败", context)
			context.Abort()
			return
		}

		userProduct := &model.UserProduct{}
		db.GetSFISDB().First(userProduct, &model.UserProduct{AppID: appID, ProductID: productID})
		//校验是否过期
		end := userProduct.EndAt
		if now > end.Unix() {
			response.FailWithDetailed(response.InterfaceExpired, nil, "剩余量已过期", context)
			context.Abort()
			return
		}
		//校验每日调用上限
		limittodaykey := fmt.Sprintf("limittoday_%d_%d_%s", time.Now().Day(), productID, appID)
		limittoday := redis.GetInt("limit", limittodaykey)
		if limittoday >= userProduct.CallTimesLimitDay { //当天调用超过次数
			response.FailWithDetailed(response.MoreThanEveryDayDataNumberLimit, nil, "请求超过每日调用总量限制", context)
			context.Abort()
			return
		} else {
			if limittoday == 0 {
				_, max := sutils.GetDayMinMax(time.Now())
				redis.Put("limit", limittodaykey, 0, int(max-now))
			}
		}
		context.Set("appID", appID)
		context.Set("productID", productID)
		context.Set("requestIP", requestIP)
	}
}