package jwt

import (
	"errors"
	"github.com/golang-jwt/jwt/v4"
	jwt2 "matrix-middle-service/pkg/config/jwt"
	"time"
)

var JwtConfig *jwt2.Config

// UserClaims
// @Param id body string true
// @Param account body string true
type UserClaims struct {
	Id       string `json:"id"`
	Account  string `json:"account"`
	Identify string `json:"identify"`

	jwt.RegisteredClaims `swaggerignore:"true"`
}

func GetToken(claims UserClaims) (string, error) {
	iat := time.Now().Unix()
	claims.IssuedAt = jwt.NewNumericDate(time.Unix(iat, 0))

	expire := iat + JwtConfig.Expire
	claims.ExpiresAt = jwt.NewNumericDate(time.Unix(expire, 0))

	token := jwt.New(jwt.SigningMethodHS256)

	token.Claims = claims

	return token.SignedString([]byte(JwtConfig.Secret))
}

func ParseToken(tokenStr string) (*UserClaims, error) {
	token, err := jwt.ParseWithClaims(tokenStr, &UserClaims{}, func(token *jwt.Token) (interface{}, error) {
		return []byte(JwtConfig.Secret), nil
	})

	if err != nil {
		return nil, err
	}

	if claims, ok := token.Claims.(*UserClaims); ok && token.Valid {
		return claims, nil
	}

	return nil, errors.New("无效的令牌")
}