package utils

import (
	"errors"

	"github.com/golang-jwt/jwt/v5"
)

// @secretKey: JWT 加解密密钥
// @iat: 时间戳
// @seconds: 过期时间，单位秒
// @payload: 数据载体
func GetJwtToken(secretKey string, iat, seconds int64, payload string) (string, error) {
	claims := make(jwt.MapClaims)
	claims["exp"] = iat + seconds
	claims["iat"] = iat
	claims["payload"] = payload
	token := jwt.New(jwt.SigningMethodHS256)
	token.Claims = claims
	return token.SignedString([]byte(secretKey))
}

// @secretKey: JWT 加解密密钥
// @iat: 时间戳
// @seconds: 过期时间，单位秒
// @payload: 数据载体
func GetJwtTokenFromMap(secretKey string, iat, seconds int64, payload map[string]string) (string, error) {
	claims := make(jwt.MapClaims)
	claims["exp"] = iat + seconds
	claims["iat"] = iat
	for k, v := range payload {
		claims[k] = v
	}
	token := jwt.New(jwt.SigningMethodHS256)
	token.Claims = claims
	return token.SignedString([]byte(secretKey))
}

// @secretKey: JWT 加解密密钥
// @token: JWT Token 的字符串
func ValidateJwtToken(secretKey, token string) (bool, error) {
	t, err := jwt.Parse(token, func(token *jwt.Token) (interface{}, error) {
		return []byte(secretKey), nil
	})
	if err != nil {
		return false, err
	}
	return t.Valid, nil
}

func ParseToken(secretKey, tokenStr string) (u jwt.MapClaims, err error) {
	token, err := jwt.Parse(tokenStr, func(token *jwt.Token) (interface{}, error) {
		return []byte(secretKey), nil
	})

	if err != nil {
		return nil, errors.New("couldn't handle this token")
	}

	if t, ok := token.Claims.(jwt.MapClaims); ok && token.Valid {
		return t, nil
	}

	return nil, errors.New("couldn't handle this token")
}