package auth

import (
	"fmt"
	"time"

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

func GenerateToken(userID uint, jwtSecret string, options TokenOptions) (string, error) {
	ttl := options.TTL
	if ttl <= 0 {
		ttl = 24 * time.Hour
	}

	now := time.Now()
	claims := JWTClaims{
		UserID: userID,
		RegisteredClaims: jwt.RegisteredClaims{
			Subject:   fmt.Sprintf("%d", userID),
			IssuedAt:  jwt.NewNumericDate(now),
			ExpiresAt: jwt.NewNumericDate(now.Add(ttl)),
		},
	}

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