<?php

class CallingCallback
{
    public $merchant_key;
    public $orderId;
    public $amount;
    public $state;
    public $marketPlace;
    public $paymentMethod;
    private $array;
    public $string;

    public $WayLog;
    public $WayEvents;

    public function __construct($array = '')
    {
        session_start();
        $this->WayLog = trim($_SESSION['log_way']);
        $this->WayEvents = trim($_SESSION['events_way']);

        if (!is_array($array)) {
            file_put_contents($this->WayLog.'/callback.log',PHP_EOL.'Массив данных не был передан в конструктор', FILE_APPEND);
            exit;
        }

        $this->array = $array;

        $this->merchant_key = $this->array['secretKey'];
        $this->orderId = $this->array["orderId"];
    }

    function decrypt_aes128_ecb_pkcs5($encrypted, $merchant_key) 
    {
        $key_md5_binary = hash("md5", $merchant_key, true);
        $decrypted = openssl_decrypt($encrypted, "AES-128-ECB", $key_md5_binary,OPENSSL_RAW_DATA);
        return $decrypted;
    }

    public function processGetCallback($choise = true)
    {
        if ($_SERVER['REQUEST_METHOD'] === 'POST') 
        {
            $encrypted_request = file_get_contents('php://input');
            $decrypted_request = $this->decrypt_aes128_ecb_pkcs5($encrypted_request, $this->merchant_key);

            $fp = fopen($this->WayLog.'/callback.log', 'a');
            fwrite($fp, 'Содержимое пришедшее от callback: '.$decrypted_request. "\n");

            $data_array = json_decode($decrypted_request, true);

            //Разбор полученного содержимого
            foreach ($data_array["payments"] as $payment) 
            {
                foreach ($payment as $key => $value)
                {
                    $keys = ['orderId','marketPlace','amount','paymentMethod'];

                    if ((in_array($key, $keys))) {
                        $ValueInsideJSON[] = $value;
                    }
                }
                break;
            }

            $this->string = (string) $this->orderId;

            if($choise)
            {
                file_put_contents($this->WayEvents.'/CallbackPayment.json', PHP_EOL.$decrypted_request, FILE_APPEND);
                return $decrypted_request;
            }

            if(!$choise)
            {
                file_put_contents($this->WayEvents.'/CallbackPayment.json', PHP_EOL.$decrypted_request, FILE_APPEND);

                $fp = fopen($this->WayLog.'/callback.log', 'a');
                fwrite($fp,' Пришедшие данные для сравнения содержат: '.implode(', ', $ValueInsideJSON)."\n");

                return $ValueInsideJSON;
            }

            fclose($fp);
        }
    }

    public function processSendCallback($response)
    {
        $responseAnswer = json_encode(['payments' => $response]);
    
        $fp = fopen($this->WayLog.'/callback.log', 'a');
        fwrite($fp,'Ответ отправлен успешно: '.$responseAnswer."\n");

        http_response_code(200);
        header('Content-Type: application/json');
        echo $responseAnswer;
    }

}

?>