<?php
/**
 * 2007-2021 patworx.de
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade AmazonPay to newer
 * versions in the future. If you wish to customize PrestaShop for your
 * needs please refer to http://www.prestashop.com for more information.
 *
 *  @author    patworx multimedia GmbH <service@patworx.de>
 *  @copyright 2007-2021 patworx multimedia GmbH
 *  @license   http://opensource.org/licenses/afl-3.0.php  Academic Free License (AFL 3.0)
 */

class AmazonPayLogger
{

    /**
     * @var AmazonPayLogger
     */
    public static $instance = false;

    /**
     * @var array
     */
    private static $loglevels = [
      1 => 'ERROR',
      2 => 'INFO',
      3 => 'DEBUG'
    ];

    /**
     * loglevel = 1 ... logs only errors
     * loglevel = 2 ... logs more information
     * loglevel = 3 ... debug level, everything logged
     *
     * @var int
     */
    private $loglevel = 1;

    /**
     * AmazonPayLogger constructor.
     */
    public function __construct()
    {
        $this->loglevel = (int)Configuration::get('AMAZONPAY_LOGLEVEL');
    }

    /**
     * Add message to Logfile, if level critical also to PS-log table
     *
     * @param $message
     * @param int $loglevel
     * @param \Exception $exception|false
     * @param array $dataarray
     */
    public function addLog(
        $message,
        $loglevel = 3,
        $exception = false,
        $dataarray = []
    ) {

        if ($this->loglevel >= $loglevel) {
            $backtrace = debug_backtrace();
            $fileinfo = '';
            $callsinfo = '';
            if (!empty($backtrace[0]) && is_array($backtrace[0])) {
                $fileinfo = $backtrace[0]['file'] . ": " . $backtrace[0]['line'];
                for ($x=1; $x<5; $x++) {
                    if (!empty($backtrace[$x]) && is_array($backtrace[$x])) {
                        $callsinfo.= "\r\n" . $backtrace[$x]['file'] . ": " . $backtrace[$x]['line'];
                    }
                }
            }
            $logstr = date("Y-m-d H:i:s");
            $logstr.= ' [' . self::$loglevels[$loglevel] . '] ';
            $logstr.= $message;
            $logstr.= ' - ' . $fileinfo;
            $logstr.= "\r\n";
            if ($callsinfo != '') {
                $logstr.= 'Backtrace :';
                $logstr.= $callsinfo . "\r\n";
            }
            $this->writeToLogfile($logstr);
            if ($loglevel == 1) {
                PrestaShopLogger::addLog($message, 3, null, 'AmazonPay');
            }
            if ($exception) {
                $exceptionlog = 'Exception thrown: ';
                $exceptionlog.= $exception->getCode() . ': ' . $exception->getMessage() . ' - ';
                $exceptionlog.= $exception->getFile() . ': ' . $exception->getLine();
                $exceptionlog.= "\r\n";
                $this->writeToLogfile($exceptionlog);
            }
            if (sizeof($dataarray) > 0) {
                if (isset($dataarray['response'])) {
                    $response = json_decode($dataarray['response'], true);
                    if (is_array($response)) {
                        $dataarray['response'] = $this->cleanUp($response);
                    }
                }
                $arraylog = 'Data-Array :';
                $arraylog.= "\r\n";
                $arraylog.= print_r($dataarray, true);
                $arraylog.= "\r\n";
                $this->writeToLogfile($arraylog);
            }
        }
    }

    /**
     * Write Logfile for debugging purposes
     *
     * @param string $string
     */
    protected function writeToLogfile($string)
    {
        file_put_contents($this->getLogFileName(), $string, FILE_APPEND);
    }

    /**
     * @param array $data
     * @return array
     */
    protected function cleanUp(array $data)
    {
        foreach ($data as $d => $v) {
            if (in_array($d, ['buyer', 'billingAddress', 'shippingAddress', 'name', 'email', 'postalCode', 'countryCode', 'buyerId'])) {
                $data[$d] = '......';
            } else {
                if (is_array($v)) {
                    $data[$d] = $this->cleanUp($v);
                } else {
                    $data[$d] = $v;
                }
            }
        }
        return $data;
    }

    /**
     * @return string
     */
    protected function getLogDir()
    {
        if (is_dir(_PS_ROOT_DIR_.'/log')) {
            return _PS_ROOT_DIR_.'/log/';
        } elseif (is_dir(_PS_ROOT_DIR_ . '/app/logs')) {
            return _PS_ROOT_DIR_.'/app/logs/';
        } else {
            return _PS_ROOT_DIR_.'/var/logs/';
        }
    }

    /**
     * @return string
     */
    protected function getLogFileName()
    {
        return $this->getLogDir() . 'amazonpay.log';
    }

    /**
     * @return AmazonPayLogger
     */
    public static function getInstance()
    {
        if (!self::$instance) {
            self::$instance = new self();
        }
        return self::$instance;
    }

    /**
     * @return array
     */
    protected function getConfigFormValuesForDebug()
    {
        $vars = AmazonPayAdminConfigFormHelper::getConfigFormValues();
        return $vars;
    }

    /**
     * @return false|string
     */
    public function getLogContent()
    {
        $debuginfo = array(
            'PrestaShop Version' => _PS_VERSION_,
            'PrestaShop URL' => _PS_BASE_URL_,
            'PrestaShop URL SSL' => _PS_BASE_URL_SSL_,
            'SSL State' => Configuration::get('PS_SSL_ENABLED') ? '1' : '0',
            'Plugin Version' => Amazonpay::$plugin_version,
            'Configuration options' => $this->getConfigFormValuesForDebug(),
        );

        $debuginfo = "\r\n\r\n" . "DEBUG INFO: " . "\r\n\r\n" . print_r($debuginfo, true);

        if (file_exists($this->getLogFileName())) {
            return $debuginfo . "\r\n\r\n" . Tools::file_get_contents($this->getLogFileName());
        }
        return $debuginfo;
    }
}