package api

import (
	"cockData/server/cache"
	"cockData/server/log"
	"crypto/md5"
	"encoding/hex"
	"errors"
	"fmt"
	"github.com/gin-gonic/gin"
	"github.com/gin-gonic/gin/binding"
)

const SessionRedisKey = "cocks:sessions:%s"

type SessionCache struct {
	UserID uint
	Region string
}

func getSessionKey(session string) string {
	return fmt.Sprintf(SessionRedisKey, session)
}

type SessionParams struct {
	Session string `json:"session" binding:"required"`
}

func createSessionAndSave(userID uint, region string) (session string, err error) {
	//originStr := fmt.Sprintf("%d:%d", userID, time.Now().UnixNano())
	originStr := fmt.Sprintf("%d", userID)
	hash := md5.New()
	_, err = hash.Write([]byte(originStr))
	if err != nil {
		log.Warn("创建Session MD5失败")
		return
	}
	salt := "rd-session"
	session = hex.EncodeToString(hash.Sum([]byte(salt))) // TODO 用MD5没问题就不改
	sessionCache := SessionCache{
		UserID: userID,
		Region: region,
	}
	//ex, _ := time.ParseDuration("72h")
	err = cache.RedisSetObj(getSessionKey(session), sessionCache)
	return
}

func getSession(session string) (userID uint, err error) {
	var sessionCache SessionCache
	//ex, _ := time.ParseDuration("72h")
	err = cache.RedisGetObj(getSessionKey(session), &sessionCache)
	if err != nil {
		return
	}
	userID = sessionCache.UserID
	return
}

func CheckSession(context *gin.Context) {
	log.Warnf("访问服务端 %s", context.Request.URL)
	var params SessionParams
	err := context.ShouldBindBodyWith(&params, binding.JSON)
	if err != nil {
		log.Warnf("未携带session参数 %+v", params)
		ResponseApi(context, *CreateSessionErrorResponse())
		return
	}
	userId, err := getSession(params.Session)
	if err != nil {
		log.Warnf("session获取失败 %+v", err)
		ResponseApi(context, *CreateSessionErrorResponse())
		return
	}
	saveOpenID(context, userId)
}

const OpenIdKey = "OPEN_ID"
const OpenNameKey = "USER_NAME"
const OpenAvatarKey = "USER_AVATAR"

func saveOpenID(context *gin.Context, openID uint) {
	context.Set(OpenIdKey, openID)
}

func CheckParamsAndOpenId(context *gin.Context, obj interface{}) (uint, error) {
	err := context.ShouldBindBodyWith(&obj, binding.JSON)
	log.Infof("请求参数 %s", obj)
	if err != nil {
		ResponseApi(context, *CreateParamsErrorResponse())
		return 0, errors.New("params error")
	}
	return GetOpenId(context)
}

func GetOpenId(context *gin.Context) (uint, error) {
	openID := context.GetUint(OpenIdKey)
	if openID == 0 {
		return 0, errors.New("no open id")
	}
	return openID, nil
}