package RouterManchong

import (
	"crypto/md5"
	"encoding/hex"
	"errors"
	"fmt"
	"manchong"
	"strconv"
	"time"
)

type reqBody struct {
	CONTENT struct {
		SIGN      string `json:"SIGN"`
		TIMESTAMP string `json:"TIMESTAMP"`
	} `json:"CONTENT"`
}

func (r *reqBody) check(appid string) (string, error) {
	t, err := strconv.ParseInt(r.CONTENT.TIMESTAMP, 10, 0)
	if err != nil {
		return "11", err
	}
	now := time.Now().UnixNano() / 1e6
	if t > now+5*60*1000 || t < now-5*60*1000 {
		return "14", errors.New("MsgBody Check TIMESTAMP超过时限")
	}
	appc, ok := manchong.CFG.Users[appid]
	if !ok {
		return "09", errors.New("MsgBody Check APPID已经失效")
	}
	m5 := md5.New()
	m5.Write([]byte(fmt.Sprintf("%s%s", appc, r.CONTENT.TIMESTAMP)))
	str := hex.EncodeToString(m5.Sum(nil))
	if str != r.CONTENT.SIGN {
		return "08", errors.New("MsgBody Check 签名验证失败")
	}
	return "00", nil
}