<?php
abstract class App_Service_Payment_Abstract
{
    const VERIFY_IPN_TYPE = 'VERIFY_IPN';

    protected $_options = array();
    protected $_forbiddenFields = array();
    protected $_logFileName = 'all';
    protected $_paymentConfig;
    protected $_paymentConfigAlias;
    protected $_itemList;
    protected $_paymentType;

    function __construct($options = array())
    {
        if (isset($options['data']['itemList']) && is_array($options['data']['itemList'])) {
            $this->_setItemList($options['data']['itemList']);
            unset($options['data']['itemList']);
        }
        $this->setOptions($options);
        if (isset($options['type'])) {
            $this->_setPaymentType($options['type']);
        }
        return $this;
    }

    public function setOptions($options)
    {
        $options = Qs_Options::setOptions($this, $options);
        $this->_options = array_merge($this->_options, $options);
        return $this;
    }

    public function getOptions()
    {
        return $this->_options;
    }

    public function getOption($option)
    {
        if (array_key_exists($option, $this->_options)) {
            return $this->_options[$option];
        }
        return false;
    }

    protected function _writeLog($data)
    {
        foreach ($this->_forbiddenFields as $field) {
            if (isset($data[$field])) {
                unset($data[$field]);
            }
        }
        $logsPath = BASE_PATH . '/tmp/payment-logs';
        if (!$this->_createLogDir($logsPath)) {
            return false;
        }
        $logsPath .= '/' . date('Y-m-d');
        if (!$this->_createLogDir($logsPath)) {
            return false;
        }
        $logsPath .= '/' . $this->_logFileName . '.log';
        $writer = new Zend_Log_Writer_Stream($logsPath);
        $logger = new Zend_Log($writer);
        $logger->log(json_encode($data), Zend_Log::INFO);
        return $this;
    }

    protected function _createLogDir($logsPath)
    {
        if (!is_dir($logsPath)) {
            $umask = umask(0);
            if (false === mkdir($logsPath, 0777)) {
                umask($umask);
                return false;
            }
            umask($umask);
        }
        return true;
    }

    protected function _postPayment($data)
    {
        $orderConfig = $this->_getPaymentConfig('order');
        if ($orderConfig['enable']) {
            $orderClass = new $orderConfig['class']();
            $orderClass->{$orderConfig['updateMethod']}($data, true);
        }
        return $this;
    }

    protected function _getPaymentConfig($field = null)
    {
        if (!$this->_paymentConfig) {
            $this->_paymentConfig = Qs_Config::get($this->_paymentConfigAlias, Qs_Config::APP_TYPE)->toArray();
        }
        return $field ? $this->_paymentConfig[$field] : $this->_paymentConfig;
    }

    protected function _setItemList($itemList)
    {
        $this->_itemList = $itemList;
        return $this;
    }

    protected  function _getItemList()
    {
        return $this->_itemList;
    }

    protected function _setPaymentType($paymentType)
    {
        $this->_paymentType = $paymentType;
        return $this;
    }

    public function getPaymentType()
    {
        return $this->_paymentType;
    }

    /**
     * @return App_Service_Payment_ResponseAbstract
     * @throws Qs_Exception
     */
    public function getResponse()
    {
        throw new Qs_Exception('Method ' . __METHOD__ . ' is not implemented');
    }

    /**
     * PayPal IPN processing
     *
     * @return App_Service_Payment_Abstract
     */
    protected function _verifyIpn()
    {
        $postParams = Qs_Request::getPost();
        $this->_writeLog($postParams);
        $postParams['cmd'] = '_notify-validate';
        $query = http_build_query($postParams);

        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $this->_getPaymentConfig('actionUrl'));
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $query);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
        curl_setopt($ch, CURLOPT_HTTPHEADER, array('Host: ' . $this->_getPaymentConfig('host')));
        $response = curl_exec($ch);
        curl_close($ch);

        if (strcmp($response, "VERIFIED") == 0) {
            $receiverEmail = $this->_getPaymentConfig('receiverEmail');
            if ($postParams['payment_status'] == 'Completed' && $postParams['receiver_email'] == $receiverEmail) {
                $orderConfig = $this->_getPaymentConfig('order');
                if ($orderConfig['enable']) {
                    $orderClass = new $orderConfig['class']();
                    $total = Zend_Locale_Math::round($postParams['mc_gross'], 2);
                    $verifyMethod = $orderConfig['verifyMethod'];
                    $options = $postParams + array('transactionId' => $postParams['custom'], 'total' => $total);
                    if ($orderClass->{$verifyMethod}($options)) {
                        $this->_postPayment($options);
                    } else {
                        $response = 'INVALID';
                    }
                }
            } else {
                $response = 'INVALID';
            }
        }

        $this->_writeLog(array('response' => $response) + $postParams);

        return $this;
    }
}