<?php
/**
 * TNT OFFICIAL MODULE FOR PRESTASHOP.
 *
 * @author    GFI Informatique <www.gfi.fr>
 * @copyright 2016-2017 GFI Informatique, 2016-2017 TNT
 * @license   https://opensource.org/licenses/MIT MIT License
 */

require_once _PS_MODULE_DIR_.'tntofficiel/libraries/TNTOfficiel_Debug.php';
require_once _PS_MODULE_DIR_.'tntofficiel/libraries/TNTOfficiel_Logger.php';
require_once _PS_MODULE_DIR_.'tntofficiel/libraries/TNTOfficiel_JsonRPCClient.php';
require_once _PS_MODULE_DIR_.'tntofficiel/libraries/TNTOfficiel_ServiceCache.php';
require_once _PS_MODULE_DIR_.'tntofficiel/libraries/TNTOfficiel_PasswordManager.php';

final class TNTOfficiel_RelayPointsHelper
{
    /** @var Singleton */
    private static $_instance = null;

    /** @var TNTOfficiel_Logger */
    private $objLogger;

    /**
     * Constructor.
     */
    public function __construct()
    {
        TNTOfficiel_Debug::log(array('msg' => '>>', 'file' => __FILE__, 'line' => __LINE__));

        $this->objLogger = new TNTOfficiel_Logger();
    }

    /**
     * Creates a singleton.
     *
     * @param void
     *
     * @return Singleton
     */
    public static function getInstance()
    {
        TNTOfficiel_Debug::log(array('msg' => '>>', 'file' => __FILE__, 'line' => __LINE__));

        if (is_null(TNTOfficiel_RelayPointsHelper::$_instance)) {
            TNTOfficiel_RelayPointsHelper::$_instance = new TNTOfficiel_RelayPointsHelper();
        }

        return TNTOfficiel_RelayPointsHelper::$_instance;
    }

    /**
     * Get the relay points for the given postcode/city from the middleware or from the cache.
     *
     * @param $postcode
     * @param $city
     * @param $idShop
     *
     * @return array
     */
    public function getRelayPoints($postcode, $city, $idShop)
    {
        TNTOfficiel_Debug::log(array('msg' => '>>', 'file' => __FILE__, 'line' => __LINE__));

        $objCache = Cache::getInstance();

        // Get params without timestamp
        $arrRequestData = $this->_getParams($postcode, $idShop, $city);
        $strCacheKey = 'middleware::getRelayPoints_'.md5(serialize($arrRequestData));

        // Retrieve from cache if exist.
        if ($objCache->exists($strCacheKey)) {
            return Tools::jsonDecode($objCache->get($strCacheKey), true);
        }

        // JSON RPC Request to Middleware.
        $client = new TNTOfficiel_JsonRPCClient(Configuration::get('TNT_CARRIER_MIDDLEWARE_URL'));
        try {
            $arrResponse = $client->execute('getRelayPoints', $arrRequestData);
            $this->objLogger->logMessageTnt('getRelayPoints', null, 'JSON', true, 'SUCCESS');
        } catch (Exception $objException) {
            $strStatus = ($objException->getCode() == 500) ? 'FATAL' : 'ERROR';
            $strMsg = $objException->getMessage();
            $this->objLogger->logMessageTnt('getRelayPoints', $strMsg, 'JSON', false, $strStatus);

            return array();
        }

        // If no RelayPoints
        if ($arrResponse['relay_points'] === false) {
            $arrResponse['relay_points'] = array();
        }

        // Store in cache until midnight.
        $objCache->set($strCacheKey, Tools::jsonEncode($arrResponse['relay_points']), TNTOfficiel_ServiceCache::getSecondsUntilMidnight());


        return $arrResponse['relay_points'];
    }

    /**
     * Get the repositories for the given postcode from the middleware or from the cache.
     *
     * @param $postcode
     * @param $idShop
     *
     * @return array
     */
    public function getRepositories($postcode, $idShop)
    {
        TNTOfficiel_Debug::log(array('msg' => '>>', 'file' => __FILE__, 'line' => __LINE__));

        $objCache = Cache::getInstance();

        // Get params without timestamp
        $arrRequestData = $this->_getParams($postcode, $idShop);
        $strCacheKey = 'middleware::getRepositories_'.md5(serialize($arrRequestData));

        // Retrieve from cache if exist.
        if ($objCache->exists($strCacheKey)) {
            return Tools::jsonDecode($objCache->get($strCacheKey), true);
        }

        // JSON RPC Request to Middleware.
        $client = new TNTOfficiel_JsonRPCClient(Configuration::get('TNT_CARRIER_MIDDLEWARE_URL'));
        try {
            $arrResponse = $client->execute('getRepositories', $arrRequestData);
            $this->objLogger->logMessageTnt('getRepositories', null, 'JSON', true, 'SUCCESS');
        } catch (Exception $objException) {
            $strStatus = ($objException->getCode() == 500) ? 'FATAL' : 'ERROR';
            $strMsg = $objException->getMessage();
            $this->objLogger->logMessageTnt('getRepository', $strMsg, 'JSON', false, $strStatus);

            return array();
        }

        // If no Repositories.
        if ($arrResponse['repositories'] === false) {
            $arrResponse['repositories'] = array();
        }

        // Store in cache until midnight.
        $objCache->set($strCacheKey, Tools::jsonEncode($arrResponse['repositories']), TNTOfficiel_ServiceCache::getSecondsUntilMidnight());

        return $arrResponse['repositories'];
    }

    /**
     * Get the params needed by the middleware.
     *
     * @param $postcode
     * @param $idShop
     * @param null $city
     *
     * @return array
     */
    private function _getParams($postcode, $idShop, $city = null)
    {
        TNTOfficiel_Debug::log(array('msg' => '>>', 'file' => __FILE__, 'line' => __LINE__));

        $arrData = array(
            'store'    => $idShop,
            'merchant' => array(
                'identity'        => Configuration::get('TNT_CARRIER_USERNAME'),
                'password'        => TNTOfficiel_PasswordManager::getHash(),
                'merchant_number' => Configuration::get('TNT_CARRIER_ACCOUNT'),
            ),
            'postcode' => $postcode,
            'city'     => $city,
        );
        //add the city if not null
        if ($city != null) {
            $arrData['city'] = $city;
        }

        return $arrData;
    }
}