<?php

/**
 * This class is a wrapper to be able to send arrays of Payone request
 * to the Payone platform.
 *
 * Payone Connector is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Payone Connector is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Payone Connector. If not, see <http://www.gnu.org/licenses/>.
 *
 * @link https://www.bspayone.com/
 *
 * @copyright (C) BS PAYONE GmbH 2016, 2018
 * @author Florian Bender <florian.bender@bspayone.com>
 * @author Timo Kuchel <timo.kuchel@bspayone.com>
 * @author Hannes Reinberger <hannes.reinberger@bspayone.com>
 */

namespace App\Services;

// require 'vendor/autoload.php';
use Exception;
use GuzzleHttp\Client;
use GuzzleHttp\Exception\BadResponseException;
use GuzzleHttp\Exception\ConnectException;
use GuzzleHttp\Exception\RequestException;
use Psr\Http\Message\ResponseInterface;

/**
 * Class Payone
 */
class Payone
{
    /**
     * The URL of the Payone API
     */
    const PAYONE_SERVER_API_URL = 'https://api.pay1.de/post-gateway/';

    const PAYONE_CLIENT_API_URL = 'https://secure.pay1.de/client-api/';

    /**
     * performing the HTTP POST request to the PAYONE platform
     *
     * @param  array  $request
     * @param  string  $responsetype
     * @param  Client|null  $client  Optional Guzzle client (e.g. mocked in tests).
     * @return array|\Psr\Http\Message\StreamInterface Returns an array of response
     *                                                 parameters in "classic" mode, a Stream for any other mode.
     *
     * @throws Exception
     */
    public static function sendRequest($request, $responsetype = '', ?Client $client = null)
    {
        if ($client === null) {
            if ($responsetype === 'json') {
                // appends the accept: application/json header to the request
                // This is used to retrieve structured JSON in the response
                // $client = new Client(['headers' => ['accept' => 'application/json', 'content-type' => 'text/plain;charset=UTF-8']]);
                $client = new Client(['headers' => ['accept' => 'application/json']]);
            } else {
                // if $responsetype is set to anything else than "json", use the standard request
                // $client = new Client(['headers' => ['content-type' => 'text/plain;charset=UTF-8']]);
                $client = new Client;
            }
        }

        //        echo "Requesting...";
        $begin = microtime(true);
        $userMessage = 'Der Zahlungsanbieter ist nicht erreichbar, die Zahlung konnte nicht durchgeführt werden. Bitte versuchen Sie es später erneut.  Fehlercode: 1002';

        try {
            $response = $client->request('POST', self::PAYONE_SERVER_API_URL, ['form_params' => $request]);
        } catch (BadResponseException $e) {
            $error = $e->getResponse();
            $responseBodyAsString = $error->getBody()->getContents();
            MyLog::writeLog(
                'payone',
                'error',
                'Error:1002 Der Zahlungsanbieter ist nicht erreichbar, die Zahlung konnte nicht durchgeführt werden. App\Services\Payone::sendRequest HTTP-Fehlerantwort (4xx/5xx).',
                ['error' => $error, 'responseBodyAsString' => $responseBodyAsString, 'request' => $request]
            );
            abort(403, $userMessage);
        } catch (ConnectException $e) {
            MyLog::writeLog(
                'payone',
                'error',
                'Error:1002 Der Zahlungsanbieter ist nicht erreichbar, die Zahlung konnte nicht durchgeführt werden. App\Services\Payone::sendRequest Netzwerk-/Transportfehler (keine HTTP-Antwort).',
                [
                    'exception' => $e->getMessage(),
                    'request' => $request,
                ]
            );
            abort(403, $userMessage);
        } catch (RequestException $e) {
            if ($e->hasResponse()) {
                $error = $e->getResponse();
                $responseBodyAsString = $error !== null ? $error->getBody()->getContents() : '';
                MyLog::writeLog(
                    'payone',
                    'error',
                    'Error:1002 Der Zahlungsanbieter ist nicht erreichbar, die Zahlung konnte nicht durchgeführt werden. App\Services\Payone::sendRequest HTTP-Fehlerantwort.',
                    ['error' => $error, 'responseBodyAsString' => $responseBodyAsString, 'request' => $request]
                );
            } else {
                MyLog::writeLog(
                    'payone',
                    'error',
                    'Error:1002 Der Zahlungsanbieter ist nicht erreichbar, die Zahlung konnte nicht durchgeführt werden. App\Services\Payone::sendRequest Transportfehler (RequestException ohne Antwort).',
                    [
                        'exception' => $e->getMessage(),
                        'request' => $request,
                    ]
                );
            }

            abort(403, $userMessage);
        }
        if (isset($response)) {
            if (implode($response->getHeader('Content-Type')) == 'text/plain;charset=UTF-8') {
                // if the content type is text/plain, parse response into array
                $return = self::parseResponse($response);
                // \Log::channel('payone')->error('App\Services\Payone::sendRequest content type is text/plain: '.$response);

            } else {
                // if the content type is anything else, just return the response body
                $return = json_decode($response->getBody(), true);
                MyLog::writeLog(
                    'payone',
                    'error',
                    'Error: App\Services\Payone::sendRequest content type is anything else',
                    ['error' => $return, 'response' => $response, 'request' => $request]
                );
            }
        } else {
            MyLog::writeLog(
                'payone',
                'error',
                'Error: App\Services\Payone::sendRequest Something went wrong during the HTTP request',
                ['request' => $request]
            );
            throw new Exception('Something went wrong during the HTTP request.');
        }

        $end = microtime(true);
        $duration = $end - $begin;
        if (! is_array($return)) {
            MyLog::writeLog(
                'payone',
                'error',
                'Error: 1003 App\Http\Controllers\Pay\PayoneController::ResponseData response is non array: return:',
                ['return' => $return,  'response' => $response, 'request' => $request]
            );
            abort(403, 'Der Zahlungsanbieter ist nicht erreichbar, die Zahlung konnte nicht durchgeführt werden. Bitte versuchen Sie es später erneut.  Fehlercode: 1003');
        }

        if (! isset($return['status'])) {
            MyLog::writeLog(
                'payone',
                'error',
                'Error: 1004 App\Http\Controllers\Pay\PayoneController::ResponseData response has non status',
                ['return' => $return,  'response' => $response, 'request' => $request]
            );
            abort(403, 'Der Zahlungsanbieter ist nicht erreichbar, die Zahlung konnte nicht durchgeführt werden. Bitte versuchen Sie es später erneut. Fehlercode: 1004');
        }

        /*  echo "done.\n";
            echo "Request took " . $duration . " seconds.\n";
            echo "<br>";
        */
        return $return;
    }

    /**
     * gets response string an puts it into an array
     *
     * @return array
     *
     * @throws Exception
     */
    public static function parseResponse(ResponseInterface $response)
    {
        $responseArray = [];
        $explode = explode("\n", $response->getBody());
        foreach ($explode as $e) {
            $keyValue = explode('=', $e);
            if (trim($keyValue[0]) != '') {
                if (count($keyValue) == 2) {
                    $responseArray[$keyValue[0]] = trim($keyValue[1]);
                } else {
                    $key = $keyValue[0];
                    unset($keyValue[0]);
                    $value = implode('=', $keyValue);
                    $responseArray[$key] = $value;
                }
            }
        }

        /*if ($responseArray['status'] == "ERROR") {
             $msg = "Payone returned an error:\n" . print_r($responseArray, true);
             throw new Exception($msg);
         }*/
        return $responseArray;
    }
}