<?php

/* Main Gateway of Monero using a daemon online */

class Monero_Gateway extends WC_Payment_Gateway
{
    private $reloadTime = 30000;
    private $discount;
    private $confirmed = false;
    private $monero_daemon;

    function __construct()
    {
        $this->id = "monero_gateway";
        $this->method_title = __("Monero GateWay", 'monero_gateway');
        $this->method_description = __("Monero Payment Gateway Plug-in for WooCommerce. You can find more information about this payment gateway on our website. You'll need a daemon online for your address.", 'monero_gateway');
        $this->title = __("Monero Gateway", 'monero_gateway');
        $this->version = "0.21";
        //
        $this->icon = apply_filters('woocommerce_offline_icon', '');
        $this->has_fields = false;

        $this->log = new WC_Logger();

        $this->init_form_fields();
        $this->host = $this->get_option('daemon_host');
        $this->port = $this->get_option('daemon_port');
        $this->address = $this->get_option('monero_address');
        $this->username = $this->get_option('username');
        $this->password = $this->get_option('password');
        $this->discount = $this->get_option('discount');

        // After init_settings() is called, you can get the settings and load them into variables, e.g:
        // $this->title = $this->get_option('title' );
        $this->init_settings();

        // Turn these settings into variables we can use
        foreach ($this->settings as $setting_key => $value) {
            $this->$setting_key = $value;
        }

        add_action('admin_notices', array($this, 'do_ssl_check'));
        add_action('admin_notices', array($this, 'validate_fields'));
        add_action('woocommerce_thankyou_' . $this->id, array($this, 'instruction'));
        if (is_admin()) {
            /* Save Settings */
            add_action('woocommerce_update_options_payment_gateways_' . $this->id, array($this, 'process_admin_options'));
            add_filter('woocommerce_currencies', 'add_my_currency');
            add_filter('woocommerce_currency_symbol', 'add_my_currency_symbol', 10, 2);
            add_action('woocommerce_email_before_order_table', array($this, 'email_instructions'), 10, 2);
        }
        $this->monero_daemon = new Monero_Library($this->host . ':' . $this->port . '/json_rpc', $this->username, $this->password);
    }

    public function init_form_fields()
    {
        $this->form_fields = array(
            'enabled' => array(
                'title' => __('Enable / Disable', 'monero_gateway'),
                'label' => __('Enable this payment gateway', 'monero_gateway'),
                'type' => 'checkbox',
                'default' => 'no'
            ),

            'title' => array(
                'title' => __('Title', 'monero_gateway'),
                'type' => 'text',
                'desc_tip' => __('Payment title the customer will see during the checkout process.', 'monero_gateway'),
                'default' => __('Monero XMR Payment', 'monero_gateway')
            ),
            'description' => array(
                'title' => __('Description', 'monero_gateway'),
                'type' => 'textarea',
                'desc_tip' => __('Payment description the customer will see during the checkout process.', 'monero_gateway'),
                'default' => __('Pay securely using XMR.', 'monero_gateway')

            ),
            'monero_address' => array(
                'title' => __('Monero Address', 'monero_gateway'),
                'label' => __('Useful for people that have not a daemon online'),
                'type' => 'text',
                'desc_tip' => __('Monero Wallet Address', 'monero_gateway')
            ),
            'daemon_host' => array(
                'title' => __('Daemon Host/ IP', 'monero_gateway'),
                'type' => 'text',
                'desc_tip' => __('This is the Daemon Host/IP to authorize the payment with port', 'monero_gateway'),
                'default' => 'localhost',
            ),
            'daemon_port' => array(
                'title' => __('Daemon PORT', 'monero_gateway'),
                'type' => 'text',
                'desc_tip' => __('This is the Daemon Host/IP to authorize the payment with port', 'monero_gateway'),
                'default' => '18080',
            ),
            'username' => array(
                'title' => __('Daemon username', 'monero_gateway'),
                'desc_tip' => __('This is the username that you used with your monero wallet-rpc', 'monero_gateway'),
                'type' => __('text'),
                'default' => __('username', 'monero_gateway'),

            ),
            'password' => array(
                'title' => __('Daemon password', 'monero_gateway'),
                'desc_tip' => __('This is the password that you used with your monero wallet-rpc', 'monero_gateway'),
                'description' => __('you can leave these fields empty if you did not set', 'monero_gateway'),
                'type' => __('text'),
                'default' => ''

            ),
            'discount' => array(
                'title' => __('% discount for using XMR', 'monero_gateway'),

                'desc_tip' => __('Provide a discount to your customers for making a private payment with XMR!', 'monero_gateway'),
                'description' => __('Do you want to spread the word about Monero? Offer a small discount! Leave this empty if you do not wish to provide a discount', 'monero_gateway'),
                'type' => __('text'),
                'default' => '5%'

            ),
            'environment' => array(
                'title' => __(' Test Mode', 'monero_gateway'),
                'label' => __('Enable Test Mode', 'monero_gateway'),
                'type' => 'checkbox',
                'description' => __('Check this box if you are using testnet', 'monero_gateway'),
                'default' => 'no'
            ),
            'onion_service' => array(
                'title' => __(' Onion Service', 'monero_gateway'),
                'label' => __('Enable Onion Service', 'monero_gateway'),
                'type' => 'checkbox',
                'description' => __('Check this box if you are running on an Onion Service (Suppress SSL errors)', 'monero_gateway'),
                'default' => 'no'
            ),
        );
    }

    public function add_my_currency($currencies)
    {
        $currencies['XMR'] = __('Monero', 'woocommerce');
        return $currencies;
    }

    function add_my_currency_symbol($currency_symbol, $currency)
    {
        switch ($currency) {
            case 'XMR':
                $currency_symbol = 'XMR';
                break;
        }
        return $currency_symbol;
    }

    public function admin_options()
    {
        $this->log->add('Monero_gateway', '[SUCCESS] Monero Settings OK');

        echo "<h1>Monero Payment Gateway</h1>";

        echo "<p>Welcome to Monero Extension for WooCommerce. Getting started: Make a connection with daemon <a href='https://reddit.com/u/serhack'>Contact Me</a>";
        echo "<div style='border:1px solid #DDD;padding:5px 10px;font-weight:bold;color:#223079;background-color:#9ddff3;'>";
        $this->getamountinfo();
        echo "</div>";
        echo "<table class='form-table'>";
        $this->generate_settings_html();
        echo "</table>";
        echo "<h4>Learn more about using a password with the monero wallet-rpc <a href=\"https://github.com/cryptochangements34/monerowp/blob/master/README.md\">here</a></h4>";
    }

    public function getamountinfo()
    {
        $wallet_amount = $this->monero_daemon->getbalance();
        if (!isset($wallet_amount)) {
            $this->log->add('Monero_gateway', '[ERROR] No connection with daemon');
            $wallet_amount['balance'] = "0";
            $wallet_amount['unlocked_balance'] = "0";
        }
        $real_wallet_amount = $wallet_amount['balance'] / 1000000000000;
        $real_amount_rounded = round($real_wallet_amount, 6);

        $unlocked_wallet_amount = $wallet_amount['unlocked_balance'] / 1000000000000;
        $unlocked_amount_rounded = round($unlocked_wallet_amount, 6);

        echo "Your balance is: " . $real_amount_rounded . " XMR </br>";
        echo "Unlocked balance: " . $unlocked_amount_rounded . " XMR </br>";
    }

    public function process_payment($order_id)
    {
        $order = wc_get_order($order_id);
        $order->update_status('on-hold', __('Awaiting offline payment', 'monero_gateway'));
        // Reduce stock levels
        $order->reduce_order_stock();

        // Remove cart
        WC()->cart->empty_cart();

        // Return thank you redirect
        return array(
            'result' => 'success',
            'redirect' => $this->get_return_url($order)
        );

    }

    // Submit payment and handle response

    public function validate_fields()
    {
        if ($this->check_monero() != TRUE) {
            echo "<div class=\"error\"><p>Your Monero Address doesn't seem valid. Have you checked it?</p></div>";
        }

    }


    // Validate fields

    public function check_monero()
    {
        $monero_address = $this->settings['monero_address'];
        if (strlen($monero_address) == 95 && substr($monero_address, 1)) {
            return true;
        }
        return false;
    }

    public function instruction($order_id)
    {
        $order = wc_get_order($order_id);
        $amount = floatval(preg_replace('#[^\d.]#', '', $order->get_total()));
        $payment_id = $this->set_paymentid_cookie();
        $currency = $order->get_currency();
        $amount_xmr2 = $this->changeto($amount, $currency, $payment_id);
        $address = $this->address;
        if (!isset($address)) {
            // If there isn't address (merchant missed that field!), $address will be the Monero address for donating :)
            $address = "44AFFq5kSiGBoZ4NMDwYtN18obc8AemS33DBLWs3H7otXft3XjrpDtQGv7SqSsaBYBb98uNbr2VBBEt7f2wfn3RVGQBEP3A";
        }
        $uri = "monero:$address?amount=$amount?payment_id=$payment_id";
        $array_integrated_address = $this->monero_daemon->make_integrated_address($payment_id);
        if (!isset($array_integrated_address)) {
            $this->log->add('Monero_Gateway', '[ERROR] Unable to getting integrated address');
            // Seems that we can't connect with daemon, then set array_integrated_address, little hack
            $array_integrated_address["integrated_address"] = $address;
        }
        $message = $this->verify_payment($payment_id, $amount_xmr2, $order);
        if ($this->confirmed) {
            $color = "006400";
        } else {
            $color = "DC143C";
        }
        echo "<h4><font color=$color>" . $message . "</font></h4>";
        echo "<link rel='stylesheet' href='https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css'>";

        echo "<div class='row'>
				<div class='col-sm-12 col-md-12 col-lg-12'>
			        <div class='panel panel-default' id='PaymentBox_de3a227fb470475'>
        	            <div class='panel-body'>
                            <div class='row'>
                                <div class='col-sm-12 col-md-12 col-lg-12'>
						            <h3> Monero Payment Box</h3>
                                </div>
					            <div class='col-sm-3 col-md-3 col-lg-3'>
						            <img src='https://chart.googleapis.com/chart?cht=qr&chs=250x250&chl=" . $uri . "' class='img-responsive'>
					            </div>
					            <div class='col-sm-9 col-md-9 col-lg-9' style='padding:10px;'>
						            Send <b>" . $amount_xmr2 . " XMR</b> to<br/><input type='text'  class='form-control' value='" . $array_integrated_address["integrated_address"] . "'>
                                    or scan QR Code with your mobile device<br/><br/>
                                    <small>If you need help with how to pay with Monero or want to learn more about it, please go to the Monero<a href='#'>site</a>. </small>
					            </div>
					            <div class='col-sm-12 col-md-12 col-lg-12'> 
					            </div>
				            </div>
			            </div>               
		            </div>
                </div>
             </div>
      <script type='text/javascript'>setTimeout(function () { location.reload(true); }, $this->reloadTime);</script>";
    }

    private function set_paymentid_cookie()
    {
        if (!isset($_COOKIE['payment_id'])) {
            $payment_id = bin2hex(openssl_random_pseudo_bytes(8));
            setcookie('payment_id', $payment_id, time() + 2700);
        } else
            $payment_id = $_COOKIE['payment_id'];
        return $payment_id;
    }

    public function changeto($amount, $currency, $payment_id)
    {
        global $wpdb;
        // This will create a table named whatever the payment id is inside the database "WordPress"
        $create_table = "CREATE TABLE IF NOT EXISTS $payment_id (
									rate INT
									)";
        $wpdb->query($create_table);
        $rows_num = $wpdb->get_results("SELECT count(*) as count FROM $payment_id");
        if ($rows_num[0]->count > 0) // Checks if the row has already been created or not
        {
            $stored_rate = $wpdb->get_results("SELECT rate FROM $payment_id");

            $stored_rate_transformed = $stored_rate[0]->rate / 100; //this will turn the stored rate back into a decimaled number

            if (isset($this->discount)) {
                $discount_decimal = $this->discount / 100;
                $new_amount = $amount / $stored_rate_transformed;
                $discount = $new_amount * $discount_decimal;
                $final_amount = $new_amount - $discount;
                $rounded_amount = round($final_amount, 12);
            } else {
                $new_amount = $amount / $stored_rate_transformed;
                $rounded_amount = round($new_amount, 12); //the moneo wallet can't handle decimals smaller than 0.000000000001
            }
        } else // If the row has not been created then the live exchange rate will be grabbed and stored
        {
            $xmr_live_price = $this->retriveprice($currency);
            $live_for_storing = $xmr_live_price * 100; //This will remove the decimal so that it can easily be stored as an integer
            $new_amount = $amount / $xmr_live_price;
            $rounded_amount = round($new_amount, 12);

            $wpdb->query("INSERT INTO $payment_id (rate)
										 VALUES ($live_for_storing)");
        }

        return $rounded_amount;
    }


    // Check if we are forcing SSL on checkout pages
    // Custom function not required by the Gateway

    public function retriveprice($currency)
    {
        $xmr_price = file_get_contents('https://min-api.cryptocompare.com/data/price?fsym=XMR&tsyms=BTC,USD,EUR,CAD,INR,GBP&extraParams=monero_woocommerce');
        $price = json_decode($xmr_price, TRUE);
        if (!isset($price)) {
            $this->log->add('Monero_Gateway', '[ERROR] Unable to get the price of Monero');
        }
        switch ($currency) {
            case 'USD':
                return $price['USD'];
            case 'EUR':
                return $price['EUR'];
            case 'CAD':
                return $price['CAD'];
            case 'GBP':
                return $price['GBP'];
            case 'INR':
                return $price['INR'];
            case 'XMR':
                $price = '1';
                return $price;
        }
    }

    public function verify_payment($payment_id, $amount, $order_id)
    {
        /*
         * function for verifying payments
         * Check if a payment has been made with this payment id then notify the merchant
         */
        $message = "We are waiting for your payment to be confirmed";
        $amount_atomic_units = $amount * 1000000000000;
        $get_payments_method = $this->monero_daemon->get_payments($payment_id);
        if (isset($get_payments_method["payments"][0]["amount"])) {
            if ($get_payments_method["payments"][0]["amount"] >= $amount_atomic_units) {
                $message = "Payment has been received and confirmed. Thanks!";
                $this->log->add('Monero_gateway', '[SUCCESS] Payment has been recorded. Congratulations!');
                $this->confirmed = true;
                $order = wc_get_order($order_id);
                $order->update_status('completed', __('Payment has been received', 'monero_gateway'));
                global $wpdb;
                $wpdb->query("DROP TABLE $payment_id"); // Drop the table from database after payment has been confirmed as it is no longer needed

                $this->reloadTime = 3000000000000; // Greatly increase the reload time as it is no longer needed
            }
        }
        return $message;
    }

    public function do_ssl_check()
    {
        if ($this->enabled == "yes" && !$this->settings['onion_service']) {
            if (get_option('woocommerce_force_ssl_checkout') == "no") {
                echo "<div class=\"error\"><p>" . sprintf(__("<strong>%s</strong> is enabled and WooCommerce is not forcing the SSL certificate on your checkout page. Please ensure that you have a valid SSL certificate and that you are <a href=\"%s\">forcing the checkout pages to be secured.</a>"), $this->method_title, admin_url('admin.php?page=wc-settings&tab=checkout')) . "</p></div>";
            }
        }
    }

    public function connect_daemon()
    {
        $host = $this->settings['daemon_host'];
        $port = $this->settings['daemon_port'];
        $monero_library = new Monero($host, $port);
        if ($monero_library->works() == true) {
            echo "<div class=\"notice notice-success is-dismissible\"><p>Everything works! Congratulations and welcome to Monero. <button type=\"button\" class=\"notice-dismiss\">
						<span class=\"screen-reader-text\">Dismiss this notice.</span>
						</button></p></div>";

        } else {
            $this->log->add('Monero_gateway', '[ERROR] Plugin can not reach wallet rpc.');
            echo "<div class=\" notice notice-error\"><p>Error with connection of daemon, see documentation!</p></div>";
        }
    }
}