<?php

/**
 * Plugin Name: Монета | PayAnyWay
 * Description: PayAnyWay - Приём платежей для бизнеса на сайтах, в соцсетях и приложениях
 * Version: 1.5.2
 * Author: PayAnyWay
 * Author URI: https://payanyway.ru
 * Requires Plugins: woocommerce
 */

use Automattic\WooCommerce\Blocks\Payments\PaymentMethodRegistry;
use Automattic\WooCommerce\Blocks\Package;
use Automattic\WooCommerce\Enums\OrderStatus;
use Automattic\WooCommerce\Enums\ProductTaxStatus;
use Automattic\Jetpack\Constants;

add_action('plugins_loaded', 'woocommerce_payanyway', 0);
add_action('plugins_loaded', 'start_session', 1);

function woocommerce_payanyway() {
    if (!class_exists('WC_Payment_Gateway'))
        return; // if the WC payment gateway class is not available, do nothing
    if (class_exists('WC_Payanyway'))
        return;

    class WC_Payanyway extends WC_Payment_Gateway {
        const MODULE_VERSION = '1.5.2';
        const MODULE_NAME = 'payanyway';

        const PROD_ENDPOINT = 'https://www.payanyway.ru/assistant.htm';
        const DEMO_ENDPOINT = 'https://demo.moneta.ru/assistant.htm';

        const PROD_IFRAME_ENDPOINT = 'https://www.payanyway.ru/assistant.widget';
        const DEMO_IFRAME_ENDPOINT = 'https://demo.moneta.ru/assistant.widget';

        const FAIL_RESPONSE = 'FAIL';
        const XML_CONTENT_TYPE = 'application/xml';
        const JSON_CONTENT_TYPE = 'application/json';
        const TEXT_CONTENT_TYPE = 'text/plain; charset=UTF-8';
        const TRANSACTION_ID_STRING_DELIMITER = '_';
        const DESCRIPTION_MAX_LENGTH = 500;

        const CLIENT_NAME_MAX_LENGTH = 256;
        const ITEM_NAME_MAX_LENGTH = 128;
        const SHIPPING_PAYMENT_OBJECT = 'service';
        const DEFAULT_SHIPPING_NAME = 'Доставка';
        const DEFAULT_MEASURE = 'unit';

        public $id;
        public $has_fields;
        public $MNT_ID;
        public $MNT_DATAINTEGRITY_CODE;
        public $MNT_TEST_MODE;
        public $title;
        public $iniframe;
        public $debug;
        public $description;
        public $instructions;
        public $demo_mode;

        private $logger = null;

        public function __construct() {
            $this->id = 'payanyway';
            $this->method_title = 'Монета | PayAnyWay';
            $this->method_description = 'PayAnyWay - универсальный платежный агрегатор для интернет-магазинов и сервисов';
            $this->icon = plugin_dir_url(dirname(__FILE__)) . 'payanyway/assets/images/payanyway.png';
            $this->has_fields = false;

            // Load the settings
            $this->init_form_fields();
            $this->init_settings();

            // Define user set variables
            $this->MNT_ID = (int)$this->get_option('MNT_ID');
            $this->MNT_DATAINTEGRITY_CODE = $this->get_option('MNT_DATAINTEGRITY_CODE');
            $this->MNT_TEST_MODE = 0;
            $this->demo_mode = $this->get_option('demo_mode');
            $this->title = $this->get_option('title');
            $this->iniframe = $this->get_option('iniframe');
            $this->debug = $this->get_option('debug');
            $this->description = $this->get_option('description');
            $this->instructions = $this->get_option('instructions');

            // Logs
            if ($this->debug === 'yes') {
                $this->logger = wc_get_logger();
            }

            // Actions
            add_action('woocommerce_receipt_payanyway', array($this, 'receipt_page'));

            // Save options
            add_action('woocommerce_update_options_payment_gateways_payanyway', array($this, 'process_admin_options'));

            // Payment listener/API hook
            add_action('woocommerce_api_wc_payanyway', array($this, 'check_assistant_response'));

            if (!$this->is_valid_for_use()) {
                $this->enabled = false;
            }
        }

        /**
         * Check if this gateway is enabled and available in the user's country
         */
        function is_valid_for_use() {
            if (!in_array(get_option('woocommerce_currency'), array('RUB'))) {
                return false;
            }

            return true;
        }

        /**
         * Admin Panel Options
         * - Options for bits like 'title' and availability on a country-by-country basis
         *
         * @since 0.1
         **/
        public function admin_options() {
            if ($this->is_valid_for_use()) {
                $this->generate_settings_html();
            } else {
?>
                <div class="inline error">
                    <p>
                        <strong>
                            <?php _e('Шлюз отключен', 'woocommerce_gateway_payanyway'); ?>
                        </strong>:
                        <?php _e('PayAnyWay не поддерживает валюты вашего магазина.', 'woocommerce_gateway_payanyway'); ?>
                    </p>
                </div>
<?php
            }
        } // End admin_options()

        /**
         * Initialise Gateway Settings Form Fields
         *
         * @access public
         * @return void
         */
        function init_form_fields() {
            $this->form_fields = include 'includes/settings/settings-paw.php';
        }

        /**
         * Дополнительная информация в форме выбора способа оплаты
         **/
        function payment_fields() {
            echo $this->get_description();
            if (isset($_GET['pay_for_order']) && !empty($_GET['key'])) {
                $order = wc_get_order(wc_get_order_id_by_order_key(wc_clean($_GET['key'])));
                $this->receipt_page($order->get_id());
            }
        }

        /**
         * Process the payment and return the result
         **/
        function process_payment($order_id) {
            /** @var WC_Order $order */
            $order = new WC_Order($order_id);
            return array(
                'result' => 'success',
                'redirect' => add_query_arg(
                    'order-pay',
                    $order->get_id(),
                    add_query_arg(
                        'key',
                        $order->get_order_key(),
                        $order->get_checkout_payment_url()
                    )
                ),
            );
        }

        private function getPaymentObject($productName) {
            if (false !== mb_stripos($productName, 'акциз')) {
                $itemPaymentObject = 'excise';
            } elseif (false !== mb_stripos($productName, 'работ')) {
                $itemPaymentObject = 'job';
            } elseif (false !== mb_stripos($productName, 'услуг')) {
                $itemPaymentObject = 'service';
            } elseif (false !== mb_stripos($productName, 'ставк')) {
                $itemPaymentObject = 'gambling_bet';
            } elseif (false !== mb_stripos($productName, 'выигрыш')) {
                $itemPaymentObject = 'gambling_prize';
            } elseif (false !== mb_stripos($productName, 'лотере')) {
                $itemPaymentObject = 'lottery';
            } elseif (false !== mb_stripos($productName, 'приз')) {
                $itemPaymentObject = 'lottery_prize';
            } elseif (false !== mb_stripos($productName, 'интеллект')) {
                $itemPaymentObject = 'intellectual_activity';
            } elseif (false !== mb_stripos($productName, 'взнос')) {
                $itemPaymentObject = 'payment';
            } elseif (false !== mb_stripos($productName, 'агент')) {
                $itemPaymentObject = 'agent_commission';
            } else {
                $itemPaymentObject = 'commodity';
            }

            return $itemPaymentObject;
        }

        /**
         * @param string $data
         * @return string
         */
        private function getVatTag($data)
        {
            $vatList = array(
                'none' => '1105',
                'vat0' => '1104',
                'vat5' => '1108',
                'vat105' => '1110',
                'vat7' => '1109',
                'vat107' => '1111',
                'vat10' => '1103',
                'vat110' => '1107',
                'vat20' => '1102',
                'vat120' => '1106',
                'vat22' => '1113',
                'vat122' => '1114',
            );

            return isset($vatList[$data]) ? $vatList[$data] : '1105';
        }

        /**
         * @param int|null $rate
         * @return string
         */
        private function convertVatIdByRate($rate)
        {
            if ($rate === null) {
                return 'none';
            }

            $vatMap = array(
                0 => 'vat0',
                5 => 'vat5',
                7 => 'vat7',
                10 => 'vat10',
                20 => 'vat20',
                22 => 'vat22',
            );

            return isset($vatMap[$rate]) ? $vatMap[$rate] : 'vat' . $rate;
        }

        private function getPaymentMethod($productName) {
            if (false !== mb_stripos($productName, 'аванс')) {
                $itemPaymentMethod = 'advance';
            } elseif (false !== mb_stripos($productName, 'кредит')) {
                $itemPaymentMethod = 'credit';
            } else {
                $itemPaymentMethod = 'full_prepayment';
            }

            return $itemPaymentMethod;
        }

        /**
         * Форма оплаты
         **/
        function receipt_page($order_id) {
            $order = new WC_Order($order_id);

            $amount = $this->formatPrice($order->get_total());
            $test_mode = $this->MNT_TEST_MODE;
            $in_iframe = ($this->iniframe === 'yes') ? 1 : 0;
            $currency = get_woocommerce_currency();
            if ($currency === 'RUR') $currency = 'RUB';

            $transactionId = $this->createTransactionId($order_id);
            $subscriberId = $this->getSubscriberId($order);

            $signature = md5(
                $this->MNT_ID .
                $transactionId .
                $amount .
                $currency .
                $subscriberId .
                $test_mode .
                $this->MNT_DATAINTEGRITY_CODE
            );

            $wcKey = (isset($_GET['key'])) ? $_GET['key'] : '';

            $args = array(
                'MNT_ID' => $this->MNT_ID,
                'MNT_TRANSACTION_ID' => $transactionId,
                'MNT_AMOUNT' => $amount,
                'MNT_CURRENCY_CODE' => $currency,
                'MNT_TEST_MODE' => $test_mode,
                'MNT_DESCRIPTION' => $this->getDescription($order),
                'MNT_SUBSCRIBER_ID' => $subscriberId,
                'MNT_SIGNATURE' => $signature,
                'MNT_SUCCESS_URL' => get_site_url() . "/?wc-api=wc_payanyway&payanyway=success&key={$wcKey}&order_id={$order_id}",
                'MNT_FAIL_URL' => get_site_url() . "/?wc-api=wc_payanyway&payanyway=fail",
                'MNT_RETURN_URL' => get_site_url() . '/checkout/',
                'MNT_CMS' => $this->getCmsModuleVersion(),
            );

            $form_fields = array();
            foreach ($args as $key => $value) {
                $form_fields[] = '<input type="hidden" name="' . esc_attr($key) . '" value="' . esc_attr($value) . '" />';
            }

            wp_enqueue_style('paw_css_main', plugin_dir_url(__FILE__) . 'assets/css/paw-main.css', '', '');

            $demoMode = ($this->demo_mode === 'yes') ? 1 : 0;

            $this->logger && $this->logger->info('Create payment processed', array(
                'source' => self::MODULE_NAME,
                'form_data' => $args,
            ));

            if ($in_iframe) {
                $assistantEndpoint = $demoMode ? self::DEMO_IFRAME_ENDPOINT : self::PROD_IFRAME_ENDPOINT;
                $form_html  = '<br><iframe src="' . $assistantEndpoint . '?' . http_build_query($args, '', '&amp;') . '" id="pawrepliframe" frameborder="0" style="margin-top: 15px; background-color: #f7f8f9; border-radius: 10px; width: 100%; min-width: 320px; height: available; min-height: 550px;></iframe>';
                echo $form_html;
            } else {
                $assistantEndpoint = $demoMode ? self::DEMO_ENDPOINT : self::PROD_ENDPOINT;
                $paymentUrl = $assistantEndpoint . '?' . http_build_query($args);

                header('Location: ' . $paymentUrl);
            }
        }

        /**
         * Check Response
         **/
        function check_assistant_response() {
            $_REQUEST = stripslashes_deep($_REQUEST);
            $orderId = $this->getOrderIdFromTransactionId($_REQUEST['MNT_TRANSACTION_ID']);
            $order = new WC_Order($orderId);

            $payanyway = isset($_REQUEST['payanyway']) ? $_REQUEST['payanyway'] : null;
            switch ($payanyway) {
                case 'callback':
                    @ob_clean();

                    try {
                        $callback = $this->getCallbackData($_REQUEST);
                    } catch (\Exception $e) {
                        $this->logger && $this->logger->error('Exception', array(
                            'source' => self::MODULE_NAME,
                            'exception_message' => $e,
                        ));

                        $this->sendResponse(self::FAIL_RESPONSE);
                    }

                    $this->validateCallback($callback);
                    (isset($callback['MNT_COMMAND'])) && ('CHECK' === $callback['MNT_COMMAND'])
                        ? $this->handleCheckCallback($order, $callback)
                        : $this->handlePayCallback($order, $callback);
                    break;
                case 'success':
                    echo'nen';
                    $this->handleSuccess($order);
                    break;
                case 'fail':
                    $this->handleFail($order);
                    break;
                default:
                    $this->sendResponse(self::FAIL_RESPONSE);
            }
        }

        /**
         * @param WC_Order             $order
         * @param array<string, mixed> $callback
         * @return void
         * @throws \Exception
         */
        private function handleCheckCallback($order, array $callback)
        {
            if (!$this->checkSignature($callback, $callback['MNT_SIGNATURE'])) {
                $this->logger && $this->logger->info('Check callback error', array(
                    'source' => self::MODULE_NAME,
                    'error_message' => 'Неверная подпись',
                ));

                $this->sendResponse(self::FAIL_RESPONSE);
            }

            list($resultCode, $description) = $this->determineCheckResult($order, $callback);
            $responseData = $this->buildBaseResponseData($order, $callback, $resultCode, $description);

            $itemsInfo = $this->getItemsInfo($order);

            $responseData['client'] = $this->getClientInfo($order);
            $responseData['items'] = $this->getCheckItems($itemsInfo);

            $jsonResponse = $this->buildJsonResponse($responseData);

            $this->logger && $this->logger->info('Check callback processed', array(
                'source' => self::MODULE_NAME,
                'result' => json_decode($jsonResponse['data'], false),
            ));

            $this->sendResponse($jsonResponse);
        }

        /**
         * @param WC_Order             $order
         * @param array<string, mixed> $callback
         * @return void
         * @throws \Exception
         */
        private function handlePayCallback($order, array $callback)
        {
            $orderTotal = $order->get_total();
            $currencyCode = $order->get_currency();
            if ($currencyCode === 'RUR') {
                $currencyCode = 'RUB';
            }

            $shopData = array(
                'MNT_ID' => $this->MNT_ID,
                'MNT_TRANSACTION_ID' => $callback['MNT_TRANSACTION_ID'],
                'MNT_OPERATION_ID' => $callback['MNT_OPERATION_ID'],
                'MNT_AMOUNT' => $this->formatPrice($orderTotal),
                'MNT_CURRENCY_CODE' => $currencyCode,
                'MNT_SUBSCRIBER_ID' => $callback['MNT_SUBSCRIBER_ID'],
                'MNT_TEST_MODE' => $callback['MNT_TEST_MODE'],
            );

            if (!$this->checkSignature($shopData, $callback['MNT_SIGNATURE'])) {
                $this->logger && $this->logger->info('Pay callback error', array(
                    'source' => self::MODULE_NAME,
                    'error_message' => 'Неверная подпись',
                ));

                $this->sendResponse(self::FAIL_RESPONSE);
            }

            $description = $this->isPayedOrder($order) ? 'Order already paid' : 'Order success paid';
            if (!$this->isPayedOrder($order)) {
                $order->add_order_note(__('Платеж успешно завершен', 'woocommerce_gateway_payanyway'));
                $order->update_status(OrderStatus::PROCESSING, __('Платеж успешно оплачен', 'woocommerce_gateway_payanyway'));
                $order->payment_complete();
            }

            $resultCode = 200;
            $responseData = $this->buildBaseResponseData($order, $callback, $resultCode, $description);

            $itemsInfo = $this->getItemsInfo($order);

            $payInventoryJson = $this->getPayInventoryJson($itemsInfo);
            $responseData['inventory'] = $payInventoryJson ?: null;
            $clientInfo = $this->getClientInfo($order);
            $responseData['client'] = $clientInfo
                ? json_encode([$clientInfo], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES)
                : null;

            $this->logger && $this->logger->info('Pay callback processed', array(
                'source' => self::MODULE_NAME,
                'result' => $responseData,
            ));

            $this->sendResponse($this->buildXmlResponse($responseData));
        }

        /**
         * @param WC_Order $order
         * @return void
         */
        private function handleSuccess($order)
        {
            global $woocommerce;

            if (!$this->isPayedOrder($order)) {
                $order->update_status(OrderStatus::PROCESSING, __('Обработка платежа', 'woocommerce_gateway_payanyway'));
            }

            $woocommerce->cart->empty_cart();
            wp_redirect($this->get_return_url($order));
        }

        /**
         * @param WC_Order $order
         * @return void
         */
        private function handleFail($order)
        {
            if (!$this->isPayedOrder($order)) {
                $order->update_status(OrderStatus::FAILED, __('Платеж не оплачен', 'woocommerce_gateway_payanyway'));
                wp_redirect($order->get_cancel_order_url());
            }
        }

        /**
         * @param WC_Order $order
         * @return bool
         */
        private function isPayedOrder($order)
        {
            return ($order->get_status() === OrderStatus::COMPLETED);
        }

        /**
         * @param array<string, mixed> $data
         * @param string               $callbackSignature
         * @return bool
         */
        private function checkSignature(array $data, $callbackSignature)
        {
            $baseFields = array(
                'MNT_ID',
                'MNT_TRANSACTION_ID',
                'MNT_OPERATION_ID',
                'MNT_AMOUNT',
                'MNT_CURRENCY_CODE',
                'MNT_SUBSCRIBER_ID',
                'MNT_TEST_MODE',
            );

            $fields = isset($data['MNT_COMMAND']) && ('CHECK' === $data['MNT_COMMAND'])
                ? array_merge(['MNT_COMMAND'], $baseFields)
                : $baseFields;

            $signatureString = array_reduce($fields, function ($carry, $field) use ($data) {
                  return $carry . $data[$field];
                }, '') . $this->MNT_DATAINTEGRITY_CODE;

            return hash_equals(md5($signatureString), $callbackSignature);
        }

        /**
         * @param WC_Order             $order
         * @param array<string, mixed> $callback
         * @return array<int|string>
         * @throws \Exception
         */
        private function determineCheckResult($order, array $callback)
        {
            $orderStatus = $order->get_status();
            if (empty($callback['MNT_AMOUNT'])) {
                return array(100, "Order status is {$orderStatus}");
            }

            if ($orderStatus === OrderStatus::COMPLETED) {
                return array(200, 'Order Paid');
            }

            if (in_array($orderStatus, array(OrderStatus::CANCELLED, OrderStatus::FAILED, OrderStatus::REFUNDED), true)) {
                return array(500, "Order status is {$orderStatus}");
            }

            return array(402, 'Order created, but not paid');
        }

        /**
         * @param WC_Order $order
         * @param array    $callbackData
         * @param int      $resultCode
         * @param string   $description
         * @return array<string, mixed>
         * @throws \Exception
         */
        private function buildBaseResponseData($order, array $callbackData, $resultCode, $description)
        {
            $orderTotal = $order->get_total();

            $data = array(
                'MNT_ID' => $this->MNT_ID,
                'MNT_TRANSACTION_ID' => $callbackData['MNT_TRANSACTION_ID'],
                'MNT_RESULT_CODE' => $resultCode,
                'MNT_DESCRIPTION' => $this->validateString($description, self::DESCRIPTION_MAX_LENGTH),
                'MNT_AMOUNT' => $this->formatPrice($orderTotal),
                'MNT_CURRENCY_CODE' => $callbackData['MNT_CURRENCY_CODE'],
            );

            $signatureSource = $resultCode . $this->MNT_ID . $callbackData['MNT_TRANSACTION_ID'] . $this->MNT_DATAINTEGRITY_CODE;
            $data['MNT_SIGNATURE'] = md5($signatureSource);
            $data['MNT_CMS'] = $this->getCmsModuleVersion();

            return $data;
        }

        /**
         * @param WC_Order $order
         * @return array|null
         */
        private function getItemsInfo($order)
        {
            $items = $order->get_items();
            if (empty($items)) {
                return null;
            }

            $itemsInfo = array();
            foreach ($items as $item) {
                /** @var WC_Product $product */
                $product = $item->get_product();

                $name = (isset($item['name'])) ? $item['name'] : $item->get_name();
                $price = wc_get_price_including_tax($product);
                if (0.0 === $price) {
                    continue;
                }
                $quantity = (isset($item['item_meta']['_qty'][0])) ? $item['item_meta']['_qty'][0] : $item->get_quantity();
                $rate = $product->is_taxable() ? $this->getItemTaxRate($item) : null;

                $itemsInfo[] = array(
                    'name' => $name,
                    'price' => $price,
                    'quantity' => $quantity,
                    'rate' => $rate,
                );
            }

            $deliveryInfo = $this->getDeliveryInfo($order);
            if (null !== $deliveryInfo) {
                $itemsInfo[] = $deliveryInfo;
            }

            return $itemsInfo;
        }

        /**
         * @param WC_Order_Item $item
         * @return int|null
         */
        public function getItemTaxRate($item)
        {
            $taxClass = $item->get_product()->get_tax_class();
            if (empty($taxClass)) {
                $taxClass = '';
            }

            $taxRates = WC_Tax::get_rates($taxClass);
            if (empty($taxRates)) {
                return null;
            }

            $firstRate = reset($taxRates);

            return (int)$firstRate['rate'];
        }

        /**
         * @param WC_Order $order
         * @return array|null
         */
        private function getDeliveryInfo($order)
        {
            $shipping = $order->get_items('shipping');
            if (empty($shipping)) {
                return null;
            }

            $shippingMethod = method_exists($order, 'get_shipping_method') ? $order->get_shipping_method() : self::DEFAULT_SHIPPING_NAME;

            $shippingTotal = (float)$order->get_shipping_total();
            $shippingTax = (float)$order->get_shipping_tax();
            $shippingPrice = $shippingTotal + $shippingTax;
            if (0.0 === $shippingPrice) {
                return null;
            }

            $shippingRate = (0.0 !== $shippingTotal) ? ($shippingTax / $shippingTotal) * 100 : null;

            return array(
                'name' => $shippingMethod,
                'price' => $shippingPrice,
                'quantity' => 1,
                'rate' => $shippingRate,
                'isShipping' => true,
            );
        }

        /**
         * @param WC_Order $order
         * @return array
         */
        private function getClientInfo($order)
        {
            $clientInfo = array();
            $name = $this->getClientName($order);
            if (null !== $name) {
                $clientInfo['name'] = $name;
            }
            $email = $this->getClientEmail($order);
            if (null !== $email) {
                $clientInfo['email'] = $email;
            }
            $phoneNumber = $this->getClientPhone($order);
            if (null !== $phoneNumber) {
                $clientInfo['phone'] = $phoneNumber;
            }

            return $clientInfo;
        }

        /**
         * @param array|null $itemsInfo
         * @return non-empty-array
         */
        private function getCheckItems($itemsInfo)
        {
            $checkItems = array();
            foreach ($itemsInfo as $itemInfo) {
                $data = $this->extractItemData($itemInfo);

                $checkItems[] = array(
                    'name' => $data['name'],
                    'price' => $this->formatPrice($data['price']),
                    'quantity' => $data['quantity'],
                    'vat' => $data['rate'] ? $this->convertVatIdByRate($data['rate']) : 'none',
                    'measure' => self::DEFAULT_MEASURE,
                    'paymentMethod' => $this->getPaymentMethod($data['name']),
                    'paymentObject' => $data['isShipping'] ? self::SHIPPING_PAYMENT_OBJECT : $this->getPaymentObject($data['name']),
                );
            }

            return $checkItems;
        }

        /**
         * @param array<string, mixed>|null $itemsInfo
         * @return false|string
         */
        private function getPayInventoryJson($itemsInfo) {
            if (empty($itemsInfo)) {
                return false;
            }

            $inventory = array();
            foreach ($itemsInfo as $itemInfo) {
                $data = $this->extractItemData($itemInfo);
                $vat = $this->convertVatIdByRate($data['rate']);

                $inventory[] = array(
                    'name' => $data['name'],
                    'price' => $this->formatPrice($data['price']),
                    'quantity' => $this->formatQuantity($data['quantity']),
                    'vatTag' => $this->getVatTag($vat),
                    'pm' => $this->getPaymentMethod($data['name']),
                    'po' => $data['isShipping'] ? self::SHIPPING_PAYMENT_OBJECT : $this->getPaymentObject($data['name']),
                    'measure' => self::DEFAULT_MEASURE,
                );
            }

            return json_encode($inventory, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
        }

        /**
         * @param array<string, mixed> $itemInfo
         * @return array{
         *     name: string,
         *     price: float|string,
         *     quantity: float,
         *     rate: int|null,
         *     taxIncluded: bool,
         *     isShipping: bool
         * }
         */
        private function extractItemData(array $itemInfo)
        {
            return array(
                'name' => isset($itemInfo['name'])
                    ? $this->validateString($itemInfo['name'], self::ITEM_NAME_MAX_LENGTH)
                    : '',
                'price' => isset($itemInfo['price']) ? (float)$itemInfo['price'] : 0,
                'quantity' => isset($itemInfo['quantity']) ? (float)$itemInfo['quantity'] : 0,
                'rate' => isset($itemInfo['rate']) ? (int)$itemInfo['rate'] : null,
                'isShipping' => isset($itemInfo['isShipping']) && (bool)$itemInfo['isShipping'],
            );
        }

        /**
         * @param array<non-empty-string, mixed> $data
         * @return array
         * @throws \JsonException
         */
        public function buildJsonResponse(array $data)
        {
            $jsonData = array(
                'id' => $data['MNT_ID'],
                'transactionId' => $data['MNT_TRANSACTION_ID'],
                'amount' => $data['MNT_AMOUNT'],
                'signature' => $data['MNT_SIGNATURE'],
                'resultCode' => $data['MNT_RESULT_CODE'],
                'timestamp' => (new DateTime('now', new DateTimeZone('Europe/Moscow')))->format('c'),
                'description' => $data['MNT_DESCRIPTION'],
                'externalId' => $data['MNT_TRANSACTION_ID'],
                'cms' => $data['MNT_CMS'],
                'receipt' => array(
                    'client' => $data['client'],
                    'items' => $data['items'],
                ),
            );

            $json = json_encode($jsonData, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);

            return array(
                'data' => $json ?: '',
                'contentType' => self::JSON_CONTENT_TYPE,
            );
        }

        /**
         * @param array<string, mixed> $data
         * @return array
         * @throws \Exception
         */
        private function buildXmlResponse(array $data)
        {
            $dom = new \DOMDocument('1.0', 'UTF-8');
            $dom->formatOutput = false;

            $root = $dom->createElement('MNT_RESPONSE');
            $dom->appendChild($root);

            $requiredFields = array(
                'MNT_ID',
                'MNT_TRANSACTION_ID',
                'MNT_RESULT_CODE',
                'MNT_DESCRIPTION',
                'MNT_AMOUNT',
                'MNT_CURRENCY_CODE',
                'MNT_SIGNATURE',
                'MNT_CMS',
            );

            foreach ($requiredFields as $field) {
                if (isset($data[$field]) && ($data[$field] !== '')) {
                    $root->appendChild($dom->createElement($field, (string)$data[$field]));
                }
            }

            $attributes = $dom->createElement('MNT_ATTRIBUTES');
            $root->appendChild($attributes);

            $attributeMap = array(
                'INVENTORY' => isset($data['inventory']) ? $data['inventory'] : null,
                'CLIENT' => isset($data['client']) ? $data['client'] : null,
                'SNO' => isset($data['sno']) ? $data['sno'] : null,
                'DELIVERY' => isset($data['delivery']) ? $data['delivery'] : null,
            );

            foreach ($attributeMap as $key => $value) {
                if (!empty($value)) {
                    $attrElement = $dom->createElement('ATTRIBUTE');
                    $attrElement->appendChild($dom->createElement('KEY', $key));
                    $attrElement->appendChild($dom->createElement('VALUE', (string)$value));
                    $attributes->appendChild($attrElement);
                }
            }

            $xml = $dom->saveXML();

            return array(
                'data' => (false !== $xml) ? $xml : self::FAIL_RESPONSE,
                'contentType' => (false !== $xml) ? self::XML_CONTENT_TYPE : self::TEXT_CONTENT_TYPE,
            );
        }

        /**
         * @param float $price
         * @return string
         */
        private function formatPrice($price)
        {
            return number_format($price, 2, '.', '');
        }

        /**
         * @param float $quantity
         * @return string
         */
        private function formatQuantity($quantity)
        {
            $quantityString = number_format($quantity, 3, '.', '');
            return rtrim(rtrim($quantityString, '0'), '.');
        }

        /**
         * @param string $value
         * @param int    $maxLength
         * @return string
         */
        private function validateString($value, $maxLength)
        {
            $maxLength = max(0, $maxLength);
            $value = $this->sanitizeString($value);

            if (mb_strlen($value, 'UTF-8') <= $maxLength) {
                return $value;
            }

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

        /**
         * @param string $value
         * @return string
         */
        private function sanitizeString($value)
        {
            $decoded = html_entity_decode($value, ENT_QUOTES | ENT_HTML5, 'UTF-8');
            $cleaned = preg_replace('/[^\p{L}\p{N}\s:.,()_№+-]/u', '', $decoded);
            $cleaned = str_replace(['&', '/', '\\', ';', '%', '#', '"', "'"], '', $cleaned);

            return trim(preg_replace('/\s+/', ' ', $cleaned));
        }

        /**
         * @param int $orderId
         * @return string
         */
        private function createTransactionId($orderId)
        {
            $date = date('YmdHis');
            return $orderId . self::TRANSACTION_ID_STRING_DELIMITER . $date;
        }

        /**
         * @param string $transactionId
         * @return int|null
         */
        private function getOrderIdFromTransactionId($transactionId)
        {
            $transactionIdData = explode(self::TRANSACTION_ID_STRING_DELIMITER, $transactionId, 2);

            return isset($transactionIdData[0]) ? (int)$transactionIdData[0] : null;
        }

        /**
         * @param WC_Order $order
         * @return string
         */
        private function getDescription($order)
        {
            $description = "Оплата заказа №{$order->get_id()}";

            $clientName = $this->getClientName($order);
            if (null !== $clientName) {
              $description .= " от {$clientName}";
            }

            $comment = $order->get_customer_note();
            if ('' !== $comment) {
                $description .= '. Примечание к заказу: ' . htmlspecialchars($comment, ENT_QUOTES, 'UTF-8');
            }

            return $this->validateString($description, self::DESCRIPTION_MAX_LENGTH);
        }

        /**
         * @param WC_Order $order
         * @return string
         */
        private function getSubscriberId($order) {
            $email = $this->getClientEmail($order);
            if (null !== $email) {
                return $email;
            }

            $phone = $this->getClientPhone($order);

            return (null !== $phone) ? $phone : '';
        }

        /**
         * @param WC_Order $order
         * @return non-empty-string|null
         */
        private function getClientName($order)
        {
            $firstname = $order->get_billing_first_name();
            $lastname = $order->get_billing_last_name();

            $name = trim($firstname . ' ' . $lastname);

            return ('' !== $name) ? $this->validateString($name, self::CLIENT_NAME_MAX_LENGTH) : null;
        }

        /**
         * @param WC_Order $order
         * @return non-empty-string|null
         */
        private function getClientEmail($order)
        {
            $email = method_exists($order, 'get_billing_email') ? $order->get_billing_email() : $order->billing_email;
            $email = trim((string)$email);

            return ('' !== $email) ? filter_var($email, FILTER_SANITIZE_EMAIL) : null;
        }

        /**
         * @param WC_Order $order
         * @return non-empty-string|null
         */
        private function getClientPhone($order)
        {
            $phone = method_exists($order, 'get_billing_phone') ? $order->get_billing_phone() : $order->billing_phone;
            $digits = preg_replace('/\D/', '', trim((string)$phone));

            return ('' !== $digits) ? '+' . $digits : null;
        }

        /** @return string */
        private function getCmsModuleVersion()
        {
            return sprintf(
                'WooCommerce v%s (WordPress v%s)|PHP %s|%s v%s',
                $this->getWooCommerceVersion(),
                $this->getWordPressVersion(),
                PHP_VERSION,
                self::MODULE_NAME,
                self::MODULE_VERSION
            );
        }

        /** @return string */
        private function getWooCommerceVersion()
        {
            $version = '?';
            if (defined('WC_VERSION')) {
                $version = Constants::get_constant('WC_VERSION');
            } elseif (defined('WOOCOMMERCE_VERSION')) {
                $version = Constants::get_constant('WOOCOMMERCE_VERSION');
            }

            return $version;
        }

        /** @return string */
        private function getWordPressVersion()
        {
            global $wp_version;

            $version = isset($wp_version) ? $wp_version : null;
            if (null !== $version) {
                return $version;
            }

            return isset($GLOBALS['wp_version']) ? $GLOBALS['wp_version'] : '?';
        }

        /**
         * @param array<string, mixed> $requestData
         * @return array<string, mixed>
         */
        private function getCallbackData(array $requestData) {
            return array(
                'MNT_COMMAND' => $this->getOptionalStringWithDefault($requestData, 'MNT_COMMAND'),
                'MNT_ID' => $this->getRequiredString($requestData, 'MNT_ID'),
                'MNT_TRANSACTION_ID' => $this->getRequiredString($requestData, 'MNT_TRANSACTION_ID'),
                'MNT_OPERATION_ID' => $this->getOptionalStringWithDefault($requestData, 'MNT_OPERATION_ID'),
                'MNT_AMOUNT' => $this->getOptionalStringWithDefault($requestData, 'MNT_AMOUNT'),
                'MNT_CURRENCY_CODE' => $this->getRequiredString($requestData, 'MNT_CURRENCY_CODE'),
                'MNT_SUBSCRIBER_ID' => $this->getOptionalStringWithDefault($requestData, 'MNT_SUBSCRIBER_ID'),
                'MNT_TEST_MODE' => $this->getRequiredString($requestData, 'MNT_TEST_MODE'),
                'MNT_SIGNATURE' => $this->getRequiredString($requestData, 'MNT_SIGNATURE'),
            );
        }

        /**
         * @param array $callback
         * @return void
         */
        private function validateCallback(array $callback)
        {
            if (null === $this->getOrderIdFromTransactionId($callback['MNT_TRANSACTION_ID'])) {
                $this->logger && $this->logger->info('Error', array(
                    'source' => self::MODULE_NAME,
                    'error_message' => 'callback: Не удалось получить номер заказа из transactionId',
                ));

                $this->sendResponse(self::FAIL_RESPONSE);
            }

            if (empty($this->MNT_ID) || empty($this->MNT_DATAINTEGRITY_CODE)) {
                $this->logger && $this->logger->info('Error', array(
                    'source' => self::MODULE_NAME,
                    'error_message' => "callback: Не настроен платежный модуль ('Номер расширенного счёта' или 'Код проверки целостности данных', указанные в настройках расширенного счёта в системе MONETA.RU)",
                ));

                $this->sendResponse(self::FAIL_RESPONSE);
            }

            if ($this->MNT_ID !== (int)$callback['MNT_ID']) {
                $this->logger && $this->logger->info('Error', array(
                    'source' => self::MODULE_NAME,
                    'error_message' => "callback: Неверный 'Номер расширенного счёта' в callback",
                ));

                $this->sendResponse(self::FAIL_RESPONSE);
            }
        }

        /**
         * @param array<string, mixed> $params
         * @param string               $key
         * @param string               $default
         * @return string
         */
        private function getOptionalStringWithDefault(array $params, $key, $default = '')
        {
            $optionalString = $this->getOptionalString($params, $key);
            if (null !== $optionalString) {
                return $optionalString;
            }

            return $default;
        }

        /**
         * @param array<string, mixed> $params
         * @param string               $key
         * @return string|null
         */
        private function getOptionalString(array $params, $key)
        {
            $value = isset($params[$key]) ? $params[$key] : null;
            if (!is_string($value) || trim($value) === '') {
                return null;
            }

            return $value;
        }

        /**
         * @param array<string, mixed> $params
         * @param string               $key
         * @return string
         * @throws \InvalidArgumentException
         */
        private function getRequiredString(array $params, $key)
        {
            if (!isset($params[$key])) {
                throw new \InvalidArgumentException('Missing required field: ' . $key);
            }

            $value = $params[$key];
            if (!is_string($value)) {
                throw new \InvalidArgumentException(
                    sprintf('Field "%s" must be a string, %s given', $key, gettype($value))
                );
            }

            if ('' === $value) {
                throw new \InvalidArgumentException(sprintf('Field "%s" must be a non-empty string', $key));
            }

            return $value;
        }

        /**
         * @param array|string $response
         * @param int          $statusCode
         * @return void
         */
        private function sendResponse($response, $statusCode = 200)
        {
            http_response_code($statusCode);
            if (is_string($response)) {
                header('Content-Type: ' . self::TEXT_CONTENT_TYPE);
                echo $response;
            } else {
                header('Content-Type: ' . $response['contentType']);
                echo $response['data'];
            }

            exit();
        }
    }

    /**
     * Add the gateway to WooCommerce
     **/
    function add_payanyway_gateway($methods) {
        $methods[] = 'WC_Payanyway';

        return $methods;
    }

    function start_session() {
        if (!session_id()) session_start();
    }

    function end_session() {
        session_destroy();
    }

    add_action('wp_logout', 'end_session');
    add_action('wp_login', 'end_session');
    add_action('end_session_action', 'end_session');

    add_filter('woocommerce_payment_gateways', 'add_payanyway_gateway');

    add_filter('plugin_action_links', function ($links, $file) {

        if ($file != plugin_basename(__FILE__)) {
            return $links;
        }

        $settings_link = sprintf('<a href="%s">%s</a>', admin_url('admin.php?page=wc-settings&tab=checkout&section=payanyway'), 'Настройки');

        array_unshift($links, $settings_link);
        return $links;
    }, 10, 2);

    /**
     * Woocommerce blocks support
     */
    add_action('before_woocommerce_init', 'payanyway_declare_cart_checkout_blocks_compatibility');
    add_action('woocommerce_blocks_loaded', 'payanyway_woocommerce_block_support');

    function payanyway_declare_cart_checkout_blocks_compatibility() {
        if (class_exists('\Automattic\WooCommerce\Utilities\FeaturesUtil')) {
            \Automattic\WooCommerce\Utilities\FeaturesUtil::declare_compatibility('cart_checkout_blocks', __FILE__, true);
        }
    }

    function payanyway_woocommerce_block_support() {
        if (
            class_exists('Automattic\WooCommerce\Blocks\Payments\Integrations\AbstractPaymentMethodType') &&
            class_exists(PaymentMethodRegistry::class) &&
            class_exists(Package::class)
        ) {
            require_once dirname(__FILE__) . '/block-support.php';

            add_action(
                'woocommerce_blocks_payment_method_type_registration',
                function (PaymentMethodRegistry $payment_method_registry) {
                    $container = Automattic\WooCommerce\Blocks\Package::container();
                    $container->register(
                        WC_Payanyway_Blocks::class,
                        function () {
                            return new WC_Payanyway_Blocks();
                        }
                    );
                    $payment_method_registry->register($container->get(WC_Payanyway_Blocks::class));
                },
                5
            );
        }
    }
}

?>