package token

import (
	"crypto/rand"
	"crypto/sha256"
	"encoding/base64"
	"encoding/hex"
	"fmt"
)

func GenerateURLSafe(size int) (string, error) {
	if size <= 0 {
		return "", fmt.Errorf("token size must be positive")
	}
	raw := make([]byte, size)
	if _, err := rand.Read(raw); err != nil {
		return "", fmt.Errorf("generate secure token: %w", err)
	}
	return base64.RawURLEncoding.EncodeToString(raw), nil
}

func HashSHA256(value string) string {
	sum := sha256.Sum256([]byte(value))
	return hex.EncodeToString(sum[:])
}