<?php
use Proxim\Application;
use Proxim\Configuration;
use Proxim\Module\Module;
use Proxim\Module\PaymentModule;
use Proxim\Site\Site;
use Proxim\Util\ArrayUtils;
use Proxim\Validate;

define('CURRENT_PESAPAL_MODULE_DIR', realpath(dirname(__FILE__)));

require_once(CURRENT_PESAPAL_MODULE_DIR . '/classes/PesaPal.php');

class Pesapal extends PaymentModule
{
    /**
    * Pesapal configuration
    */
    const PESAPAL_ENABLED = 'PESAPAL_ENABLED';
    const PESAPAL_MODE = 'PESAPAL_MODE';
    const PESAPAL_CONSUMER_KEY = 'PESAPAL_CONSUMER_KEY';
    const PESAPAL_CONSUMER_SECRET = 'PESAPAL_CONSUMER_SECRET';

    public function __construct()
    {
        $this->name = 'pesapal';
        $this->icon = 'fa fa-credit-card';
        $this->version = '1.0.0';
        $this->prox_versions_compliancy = array('min' => '1.0.0', 'max' => Application::VERSION);
        $this->author = 'Davison Pro';
        $this->displayName = 'Pesapal';
        $this->description = 'Set up Pesapal as a payment method on your website';

        $this->bootstrap = true;
        parent::__construct();
    }

    public function isActive() {
        return Configuration::get(self::PESAPAL_ENABLED);
    }

    /**
     * Echoes a template.
     *
     * @param string $templateName Template name
     */
    public function showTemplate($templateName)
    {
        echo $this->getTemplateContent($templateName);
    }

    /**
     * Return a template.
     *
     * @param string $templateName          Template name
     * @param array  $additionnalParameters Additionnal parameters to inject on the Twig template
     *
     * @return string Parsed template
     */
    private function getTemplateContent($templateName, $additionnalParameters = array())
    {
        $this->smarty->assign($additionnalParameters);
        return $this->fetch(__DIR__ . '/views/' . $templateName.'.tpl');
    }

    public function processOrderCheckout($order, $currency) {
        $app = $this->application;
        $smarty = $this->smarty;
        $user = $app->container->user;

        $token = $params = NULL;
        $api_url = Configuration::get(self::PESAPAL_MODE) == "live" ? "https://www.pesapal.com/api" : "https://demo.pesapal.com/api";
        $post_url = $api_url . '/PostPesapalDirectOrderV4';
        $status_request = $api_url . '/querypaymentstatus';

        $consumer_key = Configuration::get( self::PESAPAL_CONSUMER_KEY );
        $consumer_secret = Configuration::get( self::PESAPAL_CONSUMER_SECRET );
        $signature_method = new OAuthSignatureMethod_HMAC_SHA1();
        
        $type = 'MERCHANT';
        $payment_method = '';
        $email = $user->email;
        $username = $user->name ? $user->name : $user->email;

        $currency = $order->currency;

        $options['currency'] = array(
            'symbol' => $currency->symbol,
            'rate' => $currency->conversion_rate
        );

        $desc = "Payment of " . formatPrice($order->total, $options) . " to " . Configuration::get('SITE_NAME');
        $code = "";
        $amount = (float) $order->total*$currency->conversion_rate;
        $currency_code = $currency->iso_code;

        $callback_url = $app->base_uri . '/payment/'.$this->name.'/callback?handle=order';

        $reference = $order->id;
        $post_xml = "<?xml version=\"1.0\" encoding=\"utf-8\"?><PesapalDirectOrderInfo xmlns:xsi=\"http://www.w3.org/2001/XMLSchemainstance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" Amount=\"" . $amount . "\" Description=\"" . $desc . "\" Code=\"" . $code . "\" Currency=\"" . $currency_code . "\" Type=\"" . $type . "\" PaymentMethod=\"" . $payment_method . "\" Reference=\"" . $reference . "\" Email=\"" . $email . "\" UserName=\"" . $username . "\" xmlns=\"http://www.pesapal.com\" />";
        $post_xml = htmlentities($post_xml);

        $consumer = new OAuthConsumer($consumer_key, $consumer_secret);

        //post transaction to pesapal
        $iframe_src = OAuthRequest::from_consumer_and_token($consumer, $token, "GET", $post_url, $params);
        $iframe_src->set_parameter("oauth_callback", $callback_url);
        $iframe_src->set_parameter("pesapal_request_data", $post_xml);
        $iframe_src->sign_request($signature_method, $consumer, $token);

        $smarty->assign([
            'iframe_src' => $iframe_src,
            'payee_email' => $user->email
        ]);
        
        return $this->getTemplateContent('pesapal.order');
    }

    public function processPaperCheckout($paper, $currency) {
        $app = $this->application;
        $smarty = $this->smarty;
        $user = $app->container->user;

        $token = $params = NULL;
        $api_url = Configuration::get(self::PESAPAL_MODE) == "live" ? "https://www.pesapal.com/api" : "https://demo.pesapal.com/api";
        $post_url = $api_url . '/PostPesapalDirectOrderV4';
        $status_request = $api_url . '/querypaymentstatus';

        $consumer_key = Configuration::get( self::PESAPAL_CONSUMER_KEY );
        $consumer_secret = Configuration::get( self::PESAPAL_CONSUMER_SECRET );
        $signature_method = new OAuthSignatureMethod_HMAC_SHA1();
        
        $type = 'MERCHANT';
        $payment_method = '';
        $email = $user->email;
        $username = $user->name ? $user->name : $user->email;

        $desc = "Payment of " . formatPrice($paper->price) . " to " . Configuration::get('SITE_NAME');
        $code = "";

        $callback_url = $app->base_uri . '/payment/' . $this->name.'/callback?handle=paper';

        $reference = $paper->id;
        $post_xml = "<?xml version=\"1.0\" encoding=\"utf-8\"?><PesapalDirectOrderInfo xmlns:xsi=\"http://www.w3.org/2001/XMLSchemainstance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" Amount=\"" . $paper->price . "\" Description=\"" . $desc . "\" Code=\"" . $code . "\" Currency=\"" . $currency->iso_code . "\" Type=\"" . $type . "\" PaymentMethod=\"" . $payment_method . "\" Reference=\"" . $reference . "\" Email=\"" . $email . "\" UserName=\"" . $username . "\" xmlns=\"http://www.pesapal.com\" />";
        $post_xml = htmlentities($post_xml);

        $consumer = new OAuthConsumer($consumer_key, $consumer_secret);

        //post transaction to pesapal
        $iframe_src = OAuthRequest::from_consumer_and_token($consumer, $token, "GET", $post_url, $params);
        $iframe_src->set_parameter("oauth_callback", $callback_url);
        $iframe_src->set_parameter("pesapal_request_data", $post_xml);
        $iframe_src->sign_request($signature_method, $consumer, $token);

        $smarty->assign([
            'iframe_src' => $iframe_src,
            'payee_email' => $user->email
        ]);
        
        return $this->getTemplateContent('pesapal.paper');
    }

    public function processAddPaymentCheckout($addPayment, $currency) {
        $app = $this->application;
        $smarty = $this->smarty;
        $user = $app->container->user;

        $token = $params = NULL;
        $api_url = Configuration::get(self::PESAPAL_MODE) == "live" ? "https://www.pesapal.com/api" : "https://demo.pesapal.com/api";
        $post_url = $api_url . '/PostPesapalDirectOrderV4';
        $status_request = $api_url . '/querypaymentstatus';

        $consumer_key = Configuration::get( self::PESAPAL_CONSUMER_KEY );
        $consumer_secret = Configuration::get( self::PESAPAL_CONSUMER_SECRET );
        $signature_method = new OAuthSignatureMethod_HMAC_SHA1();
        
        $type = 'MERCHANT'; 
        $payment_method = '';
        $email = $user->email;
        $username = $user->name ? $user->name : $user->email;

        $options['currency'] = array(
            'symbol' => $currency->symbol,
            'rate' => $currency->conversion_rate
        );

        $desc = "Payment of " . formatPrice($addPayment->total, $options) . " to " . Configuration::get('SITE_NAME');
        $code = "";
        $amount = (float) $addPayment->total*$currency->conversion_rate;
        $currency_code = $currency->iso_code;

        $callback_url = $app->base_uri . '/payment/'.$this->name.'/callback?handle=add-payment';

        $reference = $addPayment->id;
        $post_xml = "<?xml version=\"1.0\" encoding=\"utf-8\"?><PesapalDirectOrderInfo xmlns:xsi=\"http://www.w3.org/2001/XMLSchemainstance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" Amount=\"" . $amount . "\" Description=\"" . $desc . "\" Code=\"" . $code . "\" Currency=\"" . $currency_code . "\" Type=\"" . $type . "\" PaymentMethod=\"" . $payment_method . "\" Reference=\"" . $reference . "\" Email=\"" . $email . "\" UserName=\"" . $username . "\" xmlns=\"http://www.pesapal.com\" />";
        $post_xml = htmlentities($post_xml);

        $consumer = new OAuthConsumer($consumer_key, $consumer_secret);

        //post transaction to pesapal
        $iframe_src = OAuthRequest::from_consumer_and_token($consumer, $token, "GET", $post_url, $params);
        $iframe_src->set_parameter("oauth_callback", $callback_url);
        $iframe_src->set_parameter("pesapal_request_data", $post_xml);
        $iframe_src->sign_request($signature_method, $consumer, $token);

        $smarty->assign([
            'iframe_src' => $iframe_src,
            'payee_email' => $user->email
        ]);
        
        return $this->getTemplateContent('pesapal.add-payment');
    }

    public function processWalletCheckout($user_id, $amount, $currency) {
        $app = $this->application;
        $smarty = $this->smarty;
        $user = $app->container->user;

        $token = $params = NULL;
        $api_url = Configuration::get(self::PESAPAL_MODE) == "live" ? "https://www.pesapal.com/api" : "https://demo.pesapal.com/api";
        $post_url = $api_url . '/PostPesapalDirectOrderV4';
        $status_request = $api_url . '/querypaymentstatus';

        $consumer_key = Configuration::get( self::PESAPAL_CONSUMER_KEY );
        $consumer_secret = Configuration::get( self::PESAPAL_CONSUMER_SECRET );
        $signature_method = new OAuthSignatureMethod_HMAC_SHA1();
        
        $type = 'MERCHANT';
        $payment_method = '';
        $email = $user->email;
        $username = $user->name ? $user->name : $user->email;

        $options['currency'] = array(
            'symbol' => $currency->symbol,
            'rate' => $currency->conversion_rate
        );

        $desc = "Payment of " . formatPrice($amount, $options) . " to " . Configuration::get('SITE_NAME');
        $code = "";
        $amount = (float) $amount*$currency->conversion_rate;
        $currency_code = $currency->iso_code;

        $callback_url = $app->base_uri . '/payment/'.$this->name.'/callback?handle=wallet&amount=' . $amount;

        $reference = $user_id;
        $post_xml = "<?xml version=\"1.0\" encoding=\"utf-8\"?><PesapalDirectOrderInfo xmlns:xsi=\"http://www.w3.org/2001/XMLSchemainstance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" Amount=\"" . $amount . "\" Description=\"" . $desc . "\" Code=\"" . $code . "\" Currency=\"" . $currency_code . "\" Type=\"" . $type . "\" PaymentMethod=\"" . $payment_method . "\" Reference=\"" . $reference . "\" Email=\"" . $email . "\" UserName=\"" . $username . "\" xmlns=\"http://www.pesapal.com\" />";
        $post_xml = htmlentities($post_xml);

        $consumer = new OAuthConsumer($consumer_key, $consumer_secret);

        //post transaction to pesapal
        $iframe_src = OAuthRequest::from_consumer_and_token($consumer, $token, "GET", $post_url, $params);
        $iframe_src->set_parameter("oauth_callback", $callback_url);
        $iframe_src->set_parameter("pesapal_request_data", $post_xml);
        $iframe_src->sign_request($signature_method, $consumer, $token);

        $smarty->assign([
            'iframe_src' => $iframe_src,
            'payee_email' => $user->email
        ]);
        
        return $this->getTemplateContent('pesapal.wallet');
    }

    public function processTipCheckout($order_id, $amount, $currency) {
        $app = $this->application;
        $smarty = $this->smarty;
        $user = $app->container->user;

        $token = $params = NULL;
        $api_url = Configuration::get(self::PESAPAL_MODE) == "live" ? "https://www.pesapal.com/api" : "https://demo.pesapal.com/api";
        $post_url = $api_url . '/PostPesapalDirectOrderV4';
        $status_request = $api_url . '/querypaymentstatus';

        $consumer_key = Configuration::get( self::PESAPAL_CONSUMER_KEY );
        $consumer_secret = Configuration::get( self::PESAPAL_CONSUMER_SECRET );
        $signature_method = new OAuthSignatureMethod_HMAC_SHA1();
        
        $type = 'MERCHANT';
        $payment_method = '';
        $email = $user->email;
        $username = $user->name ? $user->name : $user->email;

        $options['currency'] = array(
            'symbol' => $currency->symbol,
            'rate' => $currency->conversion_rate
        );

        $desc = "Payment of " . formatPrice($amount, $options) . " to " . Configuration::get('SITE_NAME');
        $code = "";
        $amount = (float) $amount*$currency->conversion_rate;
        $currency_code = $currency->iso_code;

        $callback_url = $app->base_uri . '/payment/'.$this->name.'/callback?handle=tip&amount=' . $amount;

        $reference = $order_id;
        $post_xml = "<?xml version=\"1.0\" encoding=\"utf-8\"?><PesapalDirectOrderInfo xmlns:xsi=\"http://www.w3.org/2001/XMLSchemainstance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" Amount=\"" . $amount . "\" Description=\"" . $desc . "\" Code=\"" . $code . "\" Currency=\"" . $currency_code . "\" Type=\"" . $type . "\" PaymentMethod=\"" . $payment_method . "\" Reference=\"" . $reference . "\" Email=\"" . $email . "\" UserName=\"" . $username . "\" xmlns=\"http://www.pesapal.com\" />";
        $post_xml = htmlentities($post_xml);

        $consumer = new OAuthConsumer($consumer_key, $consumer_secret);

        //post transaction to pesapal
        $iframe_src = OAuthRequest::from_consumer_and_token($consumer, $token, "GET", $post_url, $params);
        $iframe_src->set_parameter("oauth_callback", $callback_url);
        $iframe_src->set_parameter("pesapal_request_data", $post_xml);
        $iframe_src->sign_request($signature_method, $consumer, $token);

        $smarty->assign([
            'iframe_src' => $iframe_src,
            'payee_email' => $user->email
        ]);
        
        return $this->getTemplateContent('pesapal.tip');
    }

    /**
    * Hook action verify payment
    * @param $params array
    * @return void
    */
    public function verifyPaymentAfter($params) 
    { 
        $app = $this->application;
        $user = $app->container->user;

        $consumer_key = Configuration::get( self::PESAPAL_CONSUMER_KEY );
        $consumer_secret = Configuration::get( self::PESAPAL_CONSUMER_SECRET );
        $api_url = Configuration::get( self::PESAPAL_MODE ) == "live" ? "https://www.pesapal.com/api" : "https://demo.pesapal.com/api";
        $post_url = $api_url . '/PostPesapalDirectOrderV4';
        $statusrequestAPI = $api_url . '/querypaymentstatus';

        $handle = ArrayUtils::get($params, 'handle');
        $amount = ArrayUtils::get($params, 'amount');
        $orderreference = ArrayUtils::get($params, 'pesapal_merchant_reference');
        $transaction_tracking_id = ArrayUtils::get($params, 'pesapal_transaction_tracking_id');
        $pesapal_merchant_reference = ArrayUtils::get($params, 'pesapal_merchant_reference');

        if($transaction_tracking_id) {
            $token = $params = NULL;
            $consumer = new \OAuthConsumer($consumer_key, $consumer_secret);
            $signature_method = new \OAuthSignatureMethod_HMAC_SHA1();

            //get transaction status
            $request_status = \OAuthRequest::from_consumer_and_token($consumer, $token, "GET", $statusrequestAPI, $params);
            $request_status->set_parameter("pesapal_merchant_reference", $pesapal_merchant_reference);
            $request_status->set_parameter("pesapal_transaction_tracking_id",$transaction_tracking_id);
            $request_status->sign_request($signature_method, $consumer, $token);

            $ch = curl_init();
            curl_setopt($ch, CURLOPT_URL, $request_status);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
            curl_setopt($ch, CURLOPT_HEADER, 1);
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
            if(defined('CURL_PROXY_REQUIRED')) if (\CURL_PROXY_REQUIRED == 'True')
            {
                $proxy_tunnel_flag = (defined('CURL_PROXY_TUNNEL_FLAG') && strtoupper(\CURL_PROXY_TUNNEL_FLAG) == 'FALSE') ? false : true;
                curl_setopt ($ch, CURLOPT_HTTPPROXYTUNNEL, $proxy_tunnel_flag);
                curl_setopt ($ch, CURLOPT_PROXYTYPE, CURLPROXY_HTTP);
                curl_setopt ($ch, CURLOPT_PROXY, \CURL_PROXY_SERVER_DETAILS);
            }

            $response = curl_exec($ch);
            $header_size = curl_getinfo($ch, \CURLINFO_HEADER_SIZE);
            $raw_header  = substr($response, 0, $header_size - 4);
            $headerArray = explode("\r\n\r\n", $raw_header);
            $header      = $headerArray[count($headerArray) - 1];

            //transaction status
            $elements = preg_split("/=/",substr($response, $header_size));
            $status = $elements[1];

            $params['payment_method'] = 'pesapal';
            $params['paymentId'] = $transaction_tracking_id;
            $params['amount'] = $amount;
            $params['customer_id'] = $user->id;

            if( $status == 'COMPLETED' ) {
                PaymentModule::processPayment( $orderreference, $handle, $params);
            }
        }

    }

}