<?php

declare(strict_types=1);

namespace paygw_moneta\local\receipt;

/**
 * Текстовые поля чека: «значения не должны содержать кавычек, знаков &, $, #,
 * обратных и прямых слэшей» (`cmsspecification.pdf`).
 *
 * @package paygw_moneta
 * @copyright 2026 Moneta Labs {@link https://moneta.ru/}
 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
final class ReceiptText
{
    private function __construct() {}

    public static function validate(string $value, int $maxLength): string
    {
        $maxLength = max(0, $maxLength);
        $value = self::sanitize($value);
        if (mb_strlen($value, 'UTF-8') <= $maxLength) {
            return $value;
        }

        return mb_substr($value, 0, max(0, $maxLength - 3), 'UTF-8') . ($maxLength > 3 ? '...' : '');
    }

    public static function sanitize(string $value): string
    {
        $decoded = html_entity_decode(strip_tags($value), ENT_QUOTES | ENT_HTML5, 'UTF-8');
        $whitelisted = preg_replace('/[^\p{L}\p{N}\s.,()_№+-]/u', '', $decoded) ?? '';
        $collapsed = preg_replace('/\s+/u', ' ', $whitelisted) ?? $whitelisted;

        return trim($collapsed);
    }
}