package utils

import (
	"gd_gateway/errors"
	"strconv"
	"time"

	"gd_gateway/common.in/config"

	"github.com/dgrijalva/jwt-go"
)

type UtimesClaims struct {
	Jti string `json:"jti"`
	jwt.StandardClaims
}

type UserClaims struct {
	Uid      int64  `json:"uid"`
	UserName string `json:"user_name"`
	//Password string `json:"password"`
	jwt.StandardClaims
}

type UtimesIssuer int

const (
	UserJWTKey = "be3bc479a23b6161c229b0a27359d869"
)

func ProductToken(uid int64, userName string) (string, error) {
	expired, _ := config.Conf.Cgi.GdGateway.TokenExpired.Int64()
	claims := UserClaims{
		uid,
		userName,
		jwt.StandardClaims{
			ExpiresAt: time.Now().Unix() + expired, //3600*2, //过期时间
			Subject:   strconv.FormatInt(uid, 10),  //uid
			IssuedAt:  time.Now().Unix(),           //生成时间
			NotBefore: time.Now().Unix(),
		},
	}

	plain := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
	return plain.SignedString([]byte(UserJWTKey))
}

func ParseToken(tokenString string) (int64, string, error) {
	token, err := jwt.ParseWithClaims(tokenString, &UserClaims{}, func(token *jwt.Token) (interface{}, error) {
		return []byte(UserJWTKey), nil
	})
	if err != nil {
		switch err.(*jwt.ValidationError).Errors {
		case jwt.ValidationErrorExpired:
			return 0, "", errors.UserTokenExpire
		default:
			return 0, "", errors.UserTokenError
		}
	}

	if clams, ok := token.Claims.(*UserClaims); ok {
		return clams.Uid, clams.UserName, nil
	} else {
		return 0, "", errors.UserTokenError
	}
}