<?php
class ModelExtensionPaymentPPExpress extends Model {

    public function install() {
        $this->db->query("
			CREATE TABLE IF NOT EXISTS `" . DB_PREFIX . "paypal_order` (
			  `paypal_order_id` int(11) NOT NULL AUTO_INCREMENT,
			  `order_id` int(11) NOT NULL,
			  `date_added` DATETIME NOT NULL,
			  `date_modified` DATETIME NOT NULL,
			  `capture_status` ENUM('Complete','NotComplete') DEFAULT NULL,
			  `currency_code` CHAR(3) NOT NULL,
			  `authorization_id` VARCHAR(30) NOT NULL,
			  `total` DECIMAL( 10, 2 ) NOT NULL,
			  PRIMARY KEY (`paypal_order_id`)
			) ENGINE=MyISAM DEFAULT COLLATE=utf8_general_ci
		");

        $this->db->query("
			CREATE TABLE IF NOT EXISTS `" . DB_PREFIX . "paypal_order_transaction` (
			  `paypal_order_transaction_id` int(11) NOT NULL AUTO_INCREMENT,
			  `paypal_order_id` int(11) NOT NULL,
			  `transaction_id` CHAR(20) NOT NULL,
			  `parent_id` CHAR(20) NOT NULL,
			  `date_added` DATETIME NOT NULL,
			  `note` VARCHAR(255) NOT NULL,
			  `msgsubid` CHAR(38) NOT NULL,
			  `receipt_id` CHAR(20) NOT NULL,
			  `payment_type` ENUM('none','echeck','instant', 'refund', 'void') DEFAULT NULL,
			  `payment_status` CHAR(20) NOT NULL,
			  `pending_reason` CHAR(50) NOT NULL,
			  `transaction_entity` CHAR(50) NOT NULL,
			  `amount` DECIMAL( 10, 2 ) NOT NULL,
			  `debug_data` TEXT NOT NULL,
			  `call_data` TEXT NOT NULL,
			  PRIMARY KEY (`paypal_order_transaction_id`)
			) ENGINE=MyISAM DEFAULT COLLATE=utf8_general_ci
		");
    }

    public function uninstall() {
        $this->db->query("DROP TABLE IF EXISTS `" . DB_PREFIX . "paypal_order_transaction`");
        $this->db->query("DROP TABLE IF EXISTS `" . DB_PREFIX . "paypal_order`");
    }

    public function getPayPalOrder($order_id) {
        $query = $this->db->query("SELECT * FROM `" . DB_PREFIX . "paypal_order` WHERE `order_id` = '" . (int)$order_id . "'");

        return $query->row;
    }

    public function editPayPalOrderStatus($order_id, $capture_status) {
        $this->db->query("UPDATE `" . DB_PREFIX . "paypal_order` SET `capture_status` = '" . $this->db->escape($capture_status) . "', `date_modified` = NOW() WHERE `order_id` = '" . (int)$order_id . "'");
    }

    public function addTransaction($transaction_data, $request_data = array()) {
        if ($request_data) {
            $serialized_data = json_encode($request_data);

            $this->db->query("UPDATE " . DB_PREFIX . "paypal_order_transaction SET call_data = '" . $this->db->escape($serialized_data) . "' WHERE paypal_order_transaction_id = " . (int)$paypal_order_transaction_id . " LIMIT 1");
        }



        $this->db->query("INSERT INTO `" . DB_PREFIX . "paypal_order_transaction` SET `paypal_order_id` = '" . (int)$transaction_data['paypal_order_id'] . "', `transaction_id` = '" . $this->db->escape($transaction_data['transaction_id']) . "', `parent_id` = '" . $this->db->escape($transaction_data['parent_id']) . "', `date_added` = NOW(), `note` = '" . $this->db->escape($transaction_data['note']) . "', `msgsubid` = '" . $this->db->escape($transaction_data['msgsubid']) . "', `receipt_id` = '" . $this->db->escape($transaction_data['receipt_id']) . "', `payment_type` = '" . $this->db->escape($transaction_data['payment_type']) . "', `payment_status` = '" . $this->db->escape($transaction_data['payment_status']) . "', `pending_reason` = '" . $this->db->escape($transaction_data['pending_reason']) . "', `transaction_entity` = '" . $this->db->escape($transaction_data['transaction_entity']) . "', `amount` = '" . (float)$transaction_data['amount'] . "', `debug_data` = '" . $this->db->escape($transaction_data['debug_data']) . "'");

        return $this->db->getLastId();
    }

    public function updateTransaction($transaction) {
        $this->db->query("UPDATE " . DB_PREFIX . "paypal_order_transaction SET paypal_order_id = " . (int)$transaction['paypal_order_id'] . ", transaction_id = '" . $this->db->escape($transaction['transaction_id']) . "', parent_id = '" . $this->db->escape($transaction['parent_id']) . "', date_added = '" . $this->db->escape($transaction['date_added']) . "', note = '" . $this->db->escape($transaction['note']) . "', msgsubid = '" . $this->db->escape($transaction['msgsubid']) . "', receipt_id = '" . $this->db->escape($transaction['receipt_id']) . "', payment_type = '" . $this->db->escape($transaction['payment_type']) . "', payment_status = '" . $this->db->escape($transaction['payment_status']) . "', pending_reason = '" . $this->db->escape($transaction['pending_reason']) . "', transaction_entity = '" . $this->db->escape($transaction['transaction_entity']) . "', amount = '" . $this->db->escape($transaction['amount']) . "', debug_data = '" . $this->db->escape($transaction['debug_data']) . "', call_data = '" . $this->db->escape($transaction['call_data']) . "' WHERE paypal_order_transaction_id = '" . (int)$transaction['paypal_order_transaction_id'] . "'");
    }

    public function getPaypalOrderByTransactionId($transaction_id) {
        $query = $this->db->query("SELECT * FROM " . DB_PREFIX . "paypal_order_transaction WHERE transaction_id = '" . $this->db->escape($transaction_id) . "'");

        return $query->rows;
    }

    public function getFailedTransaction($paypal_order_transaction_id) {
        $query = $this->db->query("SELECT * FROM " . DB_PREFIX . "paypal_order_transaction WHERE paypal_order_transaction_id = '" . (int)$paypal_order_transaction_id . "'");

        return $query->row;
    }

    public function getLocalTransaction($transaction_id) {
        $result = $this->db->query("SELECT * FROM " . DB_PREFIX . "paypal_order_transaction WHERE transaction_id = '" . $this->db->escape($transaction_id) . "'")->row;

        if ($result) {
            return $result;
        } else {
            return false;
        }
    }

    public function getTransaction($transaction_id) {
        $call_data = array(
            'METHOD'        => 'GetTransactionDetails',
            'TRANSACTIONID' => $transaction_id,
        );

        return $this->call($call_data);
    }

    public function getCurrencies() {
        return array(
            'AUD',
            'BRL',
            'CAD',
            'CZK',
            'DKK',
            'EUR',
            'HKD',
            'HUF',
            'ILS',
            'JPY',
            'MYR',
            'MXN',
            'NOK',
            'NZD',
            'PHP',
            'PLN',
            'GBP',
            'SGD',
            'SEK',
            'CHF',
            'TWD',
            'THB',
            'TRY',
            'USD',
        );
    }

    public function getOrderId($transaction_id) {
        $query = $this->db->query("SELECT `o`.`order_id` FROM `" . DB_PREFIX . "paypal_order_transaction` `ot` LEFT JOIN `" . DB_PREFIX . "paypal_order` `o`  ON `o`.`paypal_order_id` = `ot`.`paypal_order_id`  WHERE `ot`.`transaction_id` = '" . $this->db->escape($transaction_id) . "' LIMIT 1");

        return $query->row['order_id'];
    }

    public function getCapturedTotal($paypal_order_id) {
        $query = $this->db->query("SELECT SUM(`amount`) AS `amount` FROM `" . DB_PREFIX . "paypal_order_transaction` WHERE `paypal_order_id` = '" . (int)$paypal_order_id . "' AND `pending_reason` != 'authorization' AND (`payment_status` = 'Partially-Refunded' OR `payment_status` = 'Completed' OR `payment_status` = 'Pending') AND `transaction_entity` = 'payment'");

        return $query->row['amount'];
    }

    public function getRefundedTotal($paypal_order_id) {
        $query = $this->db->query("SELECT SUM(`amount`) AS `amount` FROM `" . DB_PREFIX . "paypal_order_transaction` WHERE `paypal_order_id` = '" . (int)$paypal_order_id . "' AND `payment_status` = 'Refunded' AND `parent_id` != ''");

        return $query->row['amount'];
    }

    public function getRefundedTotalByParentId($transaction_id) {
        $query = $this->db->query("SELECT SUM(`amount`) AS `amount` FROM `" . DB_PREFIX . "paypal_order_transaction` WHERE `parent_id` = '" . $this->db->escape($transaction_id) . "' AND `payment_type` = 'refund'");

        return $query->row['amount'];
    }

    public function cleanReturn($data) {
        $data = explode('&', $data);

        $arr = array();

        foreach ($data as $k => $v) {
            $tmp = explode('=', $v);
            $arr[$tmp[0]] = urldecode($tmp[1]);
        }

        return $arr;
    }

    public function log($data, $title = null) {
        if ($this->config->get('pp_express_debug')) {
            $this->log->write('PayPal Express debug (' . $title . '): ' . json_encode($data));
        }
    }

    public function getOrder($order_id) {
        $qry = $this->db->query("SELECT * FROM `" . DB_PREFIX . "paypal_order` WHERE `order_id` = '" . (int)$order_id . "' LIMIT 1");

        if ($qry->num_rows) {
            $order = $qry->row;
            $order['transactions'] = $this->getTransactions($order['paypal_order_id']);
            $order['captured'] = $this->totalCaptured($order['paypal_order_id']);
            return $order;
        } else {
            return false;
        }
    }

    public function totalCaptured($paypal_order_id) {
        $qry = $this->db->query("SELECT SUM(`amount`) AS `amount` FROM `" . DB_PREFIX . "paypal_order_transaction` WHERE `paypal_order_id` = '" . (int)$paypal_order_id . "' AND `pending_reason` != 'authorization' AND (`payment_status` = 'Partially-Refunded' OR `payment_status` = 'Completed' OR `payment_status` = 'Pending') AND `transaction_entity` = 'payment'");

        return $qry->row['amount'];
    }

    public function getTransactions($paypal_order_id) {
        $query = $this->db->query("SELECT `ot`.*, (SELECT COUNT(`ot2`.`paypal_order_id`) FROM `" . DB_PREFIX . "paypal_order_transaction` `ot2` WHERE `ot2`.`parent_id` = `ot`.`transaction_id`) AS `children` FROM `" . DB_PREFIX . "paypal_order_transaction` `ot` WHERE `paypal_order_id` = '" . (int)$paypal_order_id . "' ORDER BY `date_added` ASC");

        return $query->rows;
    }

    public function getTokens($test) {
        if ($test == 'sandbox') {
            $endpoint = 'https://api.sandbox.paypal.com/v1/oauth2/token';
            $client_id = 'Ad3QTBAHwhuNI_blejO4_RqvES74yWRUC61c5QVNDbxkq9csbLpDZogWp_0n';
            $client_secret = 'EGqgGxCqjs1GIa5l1Ex_Flq0Mb2oMT3rJu2kwz6FuF9QKyxCg6qNqyddxCCW';
        } else {
            $endpoint = 'https://api.paypal.com/v1/oauth2/token';
            $client_id = 'AWyAiBCUYsE156N8YpiiISQpSpep2HPoXXPrf33VBeYleE0SQJg40pgEqZvq';
            $client_secret = 'EEkc6xB30fDkgUO_YldWWHxKDquY7LBRId6FJ-parAR1CsVpK35zB6U0SIh4';
        }

        $request = '';
        $request .= 'client_id=' . $client_id;
        $request .= '&client_secret=' . $client_secret;
        $request .= '&grant_type=client_credentials';

        $additional_opts = array(
            CURLOPT_USERPWD    => $client_id . ':' . $client_secret,
            CURLOPT_POST       => true,
            CURLOPT_POSTFIELDS => $request
        );

        $curl = $this->curl($endpoint, $additional_opts);

        $this->log('cURL Response 1: ' . print_r($curl, 1));

        return $curl;
    }

    public function getUserInfo($merchant_id, $test, $access_token) {
        if ($test == 'sandbox') {
            $endpoint = 'https://api.sandbox.paypal.com/v1/customer/partners/T4E8WSXT43QPJ/merchant-integrations';
        } else {
            $endpoint = 'https://api.paypal.com/v1/customer/partners/9PDNYE4RZBVFJ/merchant-integrations';
        }

        $endpoint1 = $endpoint . '?tracking_id=' . $merchant_id;

        $header = array();
        $header[] = 'Content-Type: application/json';
        $header[] = 'Authorization: Bearer ' . $access_token;
        $header[] = 'PAYPAL_SERVICE_VERSION:1.2.0';

        $additional_opts = array(
            CURLOPT_HTTPHEADER => $header,
        );

        $curl = $this->curl($endpoint1, $additional_opts);

        $this->log('cURL Response 2: ' . print_r($curl, 1));

        if (isset($curl->merchant_id)) {
            $endpoint2 = $endpoint . '/' . $curl->merchant_id;
            $curl2 = $this->curl($endpoint2, $additional_opts);

            $this->log('cURL Response 3: ' . print_r($curl2, 1));

            if (isset($curl2->api_credentials->signature)) {
                return $curl2->api_credentials->signature;
            } else {
                return;
            }
        } else {
            return;
        }
    }

    public function call($data) {
        if ($this->config->get('pp_express_test') == 1) {
            $api_endpoint = 'https://api-3t.sandbox.paypal.com/nvp';
            $user = $this->config->get('pp_express_sandbox_username');
            $password = $this->config->get('pp_express_sandbox_password');
            $signature = $this->config->get('pp_express_sandbox_signature');
        } else {
            $api_endpoint = 'https://api-3t.paypal.com/nvp';
            $user = $this->config->get('pp_express_username');
            $password = $this->config->get('pp_express_password');
            $signature = $this->config->get('pp_express_signature');
        }

        $settings = array(
            'USER'         => $user,
            'PWD'          => $password,
            'SIGNATURE'    => $signature,
            'VERSION'      => '84',
            'BUTTONSOURCE' => 'OpenCart_Cart_EC',
        );

        $this->log($data, 'Call data');

        $defaults = array(
            CURLOPT_POST           => 1,
            CURLOPT_HEADER         => 0,
            CURLOPT_URL            => $api_endpoint,
            CURLOPT_USERAGENT      => "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.1) Gecko/20061204 Firefox/2.0.0.1",
            CURLOPT_FRESH_CONNECT  => 1,
            CURLOPT_RETURNTRANSFER => 1,
            CURLOPT_FORBID_REUSE   => 1,
            CURLOPT_TIMEOUT        => 0,
            CURLOPT_SSL_VERIFYPEER => 0,
            CURLOPT_SSL_VERIFYHOST => 0,
            CURLOPT_POSTFIELDS     => http_build_query(array_merge($data, $settings), '', "&")
        );

        $ch = curl_init();

        curl_setopt_array($ch, $defaults);

        if (!$result = curl_exec($ch)) {
            $log_data = array(
                'curl_error' => curl_error($ch),
                'curl_errno' => curl_errno($ch)
            );

            $this->log($log_data, 'CURL failed');
            return false;
        }

        $this->log($result, 'Result');

        curl_close($ch);

        return $this->cleanReturn($result);
    }

    private function curl($endpoint, $additional_opts = array()) {
        $default_opts = array(
            CURLOPT_PORT           => 443,
            CURLOPT_HEADER         => 0,
            CURLOPT_SSL_VERIFYPEER => 0,
            CURLOPT_RETURNTRANSFER => 1,
            CURLOPT_FORBID_REUSE   => 1,
            CURLOPT_FRESH_CONNECT  => 1,
            CURLOPT_URL            => $endpoint,
        );

        $ch = curl_init($endpoint);

        $opts = $default_opts + $additional_opts;

        curl_setopt_array($ch, $opts);

        $response = json_decode(curl_exec($ch));

        curl_close($ch);

        return $response;
    }

}