<?php

class PaymentParams
{
    private $order_id;
    private $merchant_id;
    private $merchant_key;
    private $request_url;
    private $success_url;
    private $fail_url;
    private $showOrderId;
    private $hold;
    private $nonce;
    private $items_receipt;
    private $send_receipt;
    private $message;
    private $messageText;
    private $params;
    private $config;

    public function __construct($config)
    {
        $this->config = $config ?? null;

        $this->order_id = $this->config['orderId'] ?? null;

        $this->merchant_id = $this->config['merchant_id'] ?? null;
        $this->merchant_key = $this->config['merchant_key'] ?? null;
        $this->request_url = $this->config['domain'] ?? null;
        $this->success_url = $this->config['success_url'] ?? null;
        $this->fail_url = $this->config['fail_url'] ?? null;
        $this->nonce = sha1(time() . "order-123");
        $this->items_receipt = [];
        $this->send_receipt = true; // Добавляем инициализацию свойства
        $this->message = '';
        $this->params = []; 

        $optionalFields = 
        [
            "showOrderId","details","paymentMethod","customerAccount","customerComment",
            "customerEmail","customerPhone","displayLanguage","recurrentable","debug",
            "fdReceipt","hold","merchantData","templates","ac","merchantData",
            "sbpSubscriptionPurpose","sbpRedirectUrl"
        ];

        foreach($optionalFields as $field) 
        {
            $this->{$field} = $this->config[$field] ?? null;
        }
    }

    public function addItemToReceipt(string $text, int $quantity, float $price, float $amount)
    {
        $this->items_receipt[] = [
            "text" => $text,
            "quantity" => $quantity,
            "price" => $price,
            "amount" => $amount,
            "tax" => "vat110",
            "type" => "full_prepayment",
            "object" => "commodity",
            "unit" => "шт."
        ];
    }

    public function generateReceipt()
    {
        $sum = 0;
        foreach ($this->items_receipt as $item)
        {
            $sum += $item['amount'] ?? null;
        }

        // Формирование чека по 54-ФЗ
        if($this->send_receipt)
        {

            $optionalFields = 
            [
                "showOrderId","details","paymentMethod","customerAccount","customerComment",
                "customerEmail","customerPhone","fail_url","success_url","displayLanguage",
                "recurrentable","debug","fdReceipt"
            ];
                
            $this->message = [
                "nonce" => $this->nonce,
                "amount" => $sum ?? null,
                "orderId" => $this->order_id ?? null,
                // "showOrderId" => $this->showOrderId,
            ];

            foreach ($optionalFields as $field) {
                if ($this->{$field} !== null) {
                    $this->message = array_merge($this->message, [$field => $this->{$field}]);
                }
            }

            $dataFields = ["debug","fdReceipt","hold","merchantData","templates","ac","merchantData","sbpSubscriptionPurpose","sbpRedirectUrl"];

            foreach ($dataFields as $field) 
            {
                if ($this->{$field} !== null) 
                {

                    $this->message = array_merge($this->message, 
                    [
                        "data" => 
                        [
                            $field => $this->{$field},
                        ]
                    ]);
                }
            }
                
            $receipt_info = [];
            $receipt_info['fdReceipt'] = ["taxSystem" => "", "items" => $this->items_receipt];
            $this->message['data'] += $receipt_info;
        }
        $this->messageText = json_encode($this->message);

        $this->params = [
            "url" => "https://" .$this->request_url. "/pay",
            "marketPlace" => $this->merchant_id,
            "message" => base64_encode($this->messageText),
            "signature" => hash('sha256', $this->messageText . $this->merchant_key)
        ];
    }

    public function renderPaymentForm(array $params): string
    {
        if (isset($params))
        {
            ?>
            <style>
            #paymentForm 
            {
                display: none; /* Скрыть форму */
            }
        </style>
        <script type="text/javascript">
            document.addEventListener("DOMContentLoaded", function() {
            document.getElementById('paymentForm').submit();
            });
        </script>
        <?php
        }

        $html = '<form id="paymentForm" method="post" action="'. $params['url'] .'">';
        $html .= '<input type="hidden"  name="marketPlace" value="'. $params['marketPlace'] .'">';
        $html .= '<input type="hidden"  name="message" value="'. $params['message'] .'">';
        $html .= '<input type="hidden"  name="signature" value="'. $params['signature'] .'">';
        $html .= '<input type="submit" value="Оплатить">';
        $html .= '</form>';

        return $html;
    }


    public function getParams(): array
    {
        return $this->params;
    }
}
?>