<?php
/**
 * aheadWorks Co.
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the EULA
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://ecommerce.aheadworks.com/LICENSE-M1.txt
 *
 * @category   AW
 * @package    AW_All
 * @copyright  Copyright (c) 2009-2010 aheadWorks Co. (http://www.aheadworks.com)
 * @license    http://ecommerce.aheadworks.com/LICENSE-M1.txt
 */
class AW_All_Block_Jsinit extends Mage_Adminhtml_Block_Template
{


    protected $_platform = -1;
    protected $_extensions_cache = array();
    protected $_extensions;

    protected $_section = '';
    protected $_store_data = null;

    /**
     * Include JS in head if section is moneybookers
     */
    protected function _prepareLayout()
    {
        $this->_section = $this->getAction()->getRequest()->getParam('section', false);
        if ($this->_section == 'awall') {
            $this->getLayout()
                    ->getBlock('head')
                    ->addJs('aw_all/aw_all.js');
            $this->setData('extensions', $this->_initExtensions());
        } elseif ($this->_section == 'awstore') {
            // AW extensions store
            $this->getLayout()
                    ->getBlock('head')
                    ->addJs('aw_all/aw_all.js');
            $this->setData('store_data', $this->_getStoreData());
        }
        parent::_prepareLayout();
    }

    /**
     * Print init JS script into body
     * @return string
     */
    protected function _toHtml()
    {
        if ($this->_section == 'awall' || $this->_section == 'awstore') {
            return parent::_toHtml();
        } else {
            return '';
        }
    }

    protected function _initExtensions()
    {

        $extensions = array();

        $modules = array_keys((array)Mage::getConfig()->getNode('modules')->children());
        sort($modules);

        foreach ($modules as $moduleName) {
            if (strstr($moduleName, 'AW_') === false) {
                continue;
            }

            if ($moduleName == 'AW_Core' || $moduleName == 'AW_All') {
                continue;
            }
            // Detect extension platform
            try {
                if ($platform = Mage::getConfig()->getNode("modules/$moduleName/platform")) {
                    $platform = strtolower($platform);
                    $ignore_platform = false;
                } else {
                    throw new Exception();
                }
            } catch (Exception $e) {
                $platform = "ce";
                $ignore_platform = true;
            }
            $platform = AW_All_Helper_Versions::convertPlatform($platform);

            // Detect installed version
            $ver = (Mage::getConfig()->getModuleConfig($moduleName)->version);
            $isPlatformValid = $platform >= $this->getPlatform();
            $feedInfo = $this->getExtensionInfo($moduleName);

            $upgradeAvailable = ($this->_convertVersion($feedInfo->getLatestVersion()) - $this->_convertVersion($ver)) > 0;

            $extensions[] = new Varien_Object(array(
                                                   'version' => $ver,
                                                   'name' => $moduleName,
                                                   'is_platform_valid' => $isPlatformValid,
                                                   'platform' => $platform,
                                                   'feed_info' => $feedInfo,
                                                   'upgrade_available' => $upgradeAvailable
                                              ));
        }
        return $extensions;
    }

    /**
     * Convert version to comparable integer
     * @param $v
     * @return int
     */
    protected function _convertVersion($v)
    {
        $digits = @explode(".", $v);
        $version = 0;
        if (is_array($digits)) {
            foreach ($digits as $k => $v) {
                $version += ($v * pow(10, max(0, (3 - $k))));
            }
        }
        return $version;
    }


    /**
     * Get extension info from cached feed
     * @param $moduleName
     * @return bool|Varien_Object
     */
    public function getExtensionInfo($moduleName)
    {
        if (!sizeof($this->_extensions_cache)) {
            if ($displayNames = Mage::app()->loadCache('aw_all_extensions_feed')) {
                $this->_extensions_cache = @unserialize($displayNames);
            }
        }
        if (array_key_exists($moduleName, $this->_extensions_cache)) {
            $data = array(
                'url' => @$this->_extensions_cache[$moduleName]['url'],
                'display_name' => @$this->_extensions_cache[$moduleName]['display_name'],
                'latest_version' => @$this->_extensions_cache[$moduleName]['version']
            );
            return new Varien_Object($data);
        }
        return new Varien_Object();
    }

    /**
     * Return icon for installed extension
     * @param $Extension
     * @return Varien_Object
     */
    public function getIcon($Extension)
    {
        if ($Extension->getUpgradeAvailable()) {
            $icon = 'aw_all/images/update.gif';
            $title = "Update available";
        } elseif (!$Extension->getIsPlatformValid()) {
            $icon = 'aw_all/images/bad.gif';
            $title = "Wrong Extension Platform";
        } else {
            $icon = 'aw_all/images/ok.gif';
            $title = "Installed and up to date";
        }
        return new Varien_Object(array('title' => $title, 'source' => $this->getSkinUrl($icon)));
    }

    /**
     * Fetch store data and return as Varien Object
     * @return Varien_Object
     */
    protected function _getStoreData()
    {
        if (!is_null($this->_store_data))
            return $this->_store_data;
        $storeData = array();
        $connection = $this->_getStoreConnection();
        $storeResponse = $connection->read();

        if ($storeResponse !== false) {
            $storeResponse = preg_split('/^\r?$/m', $storeResponse, 2);
            $storeResponse = trim($storeResponse[1]);
            Mage::app()->saveCache($storeResponse, AW_All_Helper_Config::STORE_RESPONSE_CACHE_KEY);
        }
        else {
            $storeResponse =  Mage::app()->loadCache(AW_All_Helper_Config::STORE_RESPONSE_CACHE_KEY);
            if (!$storeResponse) {
                Mage::getSingleton('adminhtml/session')->addError($this->__('Sorry, but Extensions Store is not available now. Please try again in a few minutes.'));
            }
        }

        $connection->close();
        $this->_store_data = new Varien_Object(array('text_response' => $storeResponse));
        return $this->_store_data;
    }

    /**
     * Returns URL to store
     * @return Varien_Http_Adapter_Curl
     */
    protected function _getStoreConnection()
    {
        $params = array(

        );
        $url = array();
        foreach ($params as $k => $v) {
            $url[] = urlencode($k) . "=" . urlencode($v);
        }
        $url = rtrim(AW_All_Helper_Config::STORE_URL) . (sizeof($url) ? ("?" . implode("&", $url)) : "");

        $curl = new Varien_Http_Adapter_Curl();
        $curl->setConfig(array(
                              'timeout' => 5
                         ));
        $curl->write(Zend_Http_Client::GET, $url, '1.0');

        return $curl;
    }


}