package auth
import (
	"errors"
	"time"
	"github.com/golang-jwt/jwt/v5"
	"golang.org/x/crypto/bcrypt"
)
var SecretKey = []byte("super-secret-key-change-me")
type Claims struct {
	UserID string `json:"user_id"`
	Email  string `json:"email"`
	jwt.RegisteredClaims
}
func HashPassword(password string) (string, error) {
	bytes, err := bcrypt.GenerateFromPassword([]byte(password), 14)
	return string(bytes), err
}
func CheckPassword(password, hash string) bool {
	err := bcrypt.CompareHashAndPassword([]byte(hash), []byte(password))
	return err == nil
}
func GenerateToken(userID string, email string) (string, error) {
	expirationTime := time.Now().Add(24 * time.Hour)
	claims := &Claims{
		UserID: userID,
		Email:  email,
		RegisteredClaims: jwt.RegisteredClaims{
			ExpiresAt: jwt.NewNumericDate(expirationTime),
		},
	}
	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
	return token.SignedString(SecretKey)
}
func ValidateToken(tokenString string) (*Claims, error) {
	claims := &Claims{}
	token, err := jwt.ParseWithClaims(tokenString, claims, func(token *jwt.Token) (interface{}, error) {
		return SecretKey, nil
	})
	if err != nil {
		return nil, err
	}
	if !token.Valid {
		return nil, errors.New("invalid token")
	}
	return claims, nil
}