package jwt

import (
	"time"

	"cloudnest/internal/pkg/errors"
	"github.com/golang-jwt/jwt/v5"
)

type Claims struct {
	UserID   uint   `json:"user_id"`
	Username string `json:"username"`
	UserCode string `json:"user_code"`
	jwt.RegisteredClaims
}

func GenerateToken(userID uint, username, userCode string, secret string, expiresIn time.Duration) (string, error) {
	claims := Claims{
		UserID:   userID,
		Username: username,
		UserCode: userCode,
		RegisteredClaims: jwt.RegisteredClaims{
			ExpiresAt: jwt.NewNumericDate(time.Now().Add(expiresIn)),
		},
	}
	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
	return token.SignedString([]byte(secret))
}

func ParseToken(tokenString, secret string) (*Claims, error) {
	token, err := jwt.ParseWithClaims(tokenString, &Claims{}, func(token *jwt.Token) (interface{}, error) {
		return []byte(secret), nil
	})
	if err != nil {
		return nil, errors.Unauthorized("invalid token")
	}
	if claims, ok := token.Claims.(*Claims); ok && token.Valid {
		return claims, nil
	}
	return nil, errors.Unauthorized("invalid token")
}