<?php
if (!defined('WHMCS')) {
	exit('This file cannot be accessed directly');
}

$GATEWAYMODULE['emsname'] = 'ems';
$GATEWAYMODULE['emsvisiblename'] = 'EMS';
$GATEWAYMODULE['emspaytype'] = 'Invoices';

function ems_config() {
    $configarray = array(
    	'FriendlyName' => array(
        	'Type'		=>	'System',
            'Value'		=>	'EMS'
		),
		'shopid' => array(
			'FriendlyName'	=>	'Shop ID',
			'Type'			=>	'text',
			'Size'			=>	'20',
            'Default'		=> 	'Shop ID'
        ),
		'secretkey' => array(
			'FriendlyName'	=>	'Secret key',
			'Type'			=>	'text',
			'Size'			=>	'20',
            'Default'		=> 	'Secret key'
        ),
		'username' => array(
			'FriendlyName'	=>	'Username',
			'Type'			=>	'text',
			'Size'			=>	'20',
            'Default'		=> 	'Username'
        ),
		'password' => array(
			'FriendlyName'	=>	'Password',
			'Type'			=>	'text',
			'Size'			=>	'20',
            'Default'		=> 	'Password'
        ),
		'testmode' => array(
			'FriendlyName'	=>	'Test mode',
			'Type'			=>	'yesno',
			'Description'	=>	'use test mode'
        )
    );
    return $configarray;
}

function ems_link($params) {
	$hash = hash('SHA512', $params['shopid'].';'.$params['secretkey'].';'.$params['invoiceid'].';'.$params['amount'].';'.$params['currency']);
	$ch = curl_init();

	if ($params['testmode']) {
		$url = 'https://test-ms.epayments.com';
	} else {
		$url = 'https://ms.epayments.com';
	}

	curl_setopt($ch, CURLOPT_URL, $url.'/api/v1/public/paymentpage?ShopId='.$params['shopid'].'&OrderName=EMSPayment&OrderNumber='.$params['invoiceid'].'&OrderSumAmount='.$params['amount'].'&OrderSumCurrency='.$params['currency'].'&Sha512='.$hash.'&GatewayId=1');
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
	curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
	curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
	curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
	curl_setopt($ch, CURLOPT_HEADER, false);
	curl_setopt($ch, CURLOPT_NOBODY, false);

	if ($params['testmode']) {
		curl_setopt($ch, CURLOPT_VERBOSE, true);

		$verbose = fopen(dirname(__FILE__).'/ems_init_log_'.time().'.txt', 'w+');
		curl_setopt($ch, CURLOPT_STDERR, $verbose);
	}

	$res = curl_exec($ch);
	curl_close($ch);

	$json = json_decode($res, true);

	if (empty($json['result']['urlToRedirect'])) {
    	var_dump($res);
    	exit;
    }

	$url = parse_url($json['result']['urlToRedirect']);

	$form = '<form action="'.$url['scheme'].'://'.$url['host'].$url['path'].'" method="GET">';
	$params = explode('&', $url['query']);

	foreach($params as $param) {
		list($key, $val) = explode('=', $param);
		$form .= '<input name="'.$key.'" type="hidden" value="'.$val.'">';
	}

	$form .= '<input type="submit" value="GO" />';
	$form .= '</form>';

	return $form;
}
?>