<?php
declare(strict_types=1);

namespace Esun\Oceanpayment\Model\Callback;

use Magento\Framework\Exception\LocalizedException;

class Parser
{
    private const FIELDS = [
        'notice_type',
        'push_dateTime',
        'response_type',
        'account',
        'terminal',
        'signValue',
        'methods',
        'order_number',
        'card_country',
        'order_currency',
        'order_amount',
        'order_notes',
        'card_number',
        'card_type',
        'payment_country',
        'payment_id',
        'payment_status',
        'payment_authType',
        'payment_details',
        'payment_solutions',
        'payment_risk',
        'payment_amount',
        'payment_exchangeRate',
        'pay_barCode',
        'auth_reason',
        'order_operator',
        'auth_code',
    ];

    public function parse(string $body, array $parameters): array
    {
        if (strlen($body) > 1048576) {
            throw new LocalizedException(__('Oceanpayment callback body is too large.'));
        }

        $source = $parameters;
        if (str_starts_with(ltrim($body), '<')) {
            $previous = libxml_use_internal_errors(true);
            try {
                $xml = simplexml_load_string($body, \SimpleXMLElement::class, LIBXML_NONET | LIBXML_NOCDATA);
            } finally {
                libxml_clear_errors();
                libxml_use_internal_errors($previous);
            }

            if ($xml === false) {
                throw new LocalizedException(__('Oceanpayment callback XML is invalid.'));
            }
            $source = [];
            foreach (self::FIELDS as $field) {
                $source[$field] = isset($xml->{$field}) ? (string)$xml->{$field} : '';
            }
        }

        $result = [];
        foreach (self::FIELDS as $field) {
            $value = $source[$field] ?? '';
            $result[$field] = is_scalar($value) ? trim((string)$value) : '';
        }

        return $result;
    }
}