<?php
/**
 * Magento
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/osl-3.0.php
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@magentocommerce.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade Magento to newer
 * versions in the future. If you wish to customize Magento for your
 * needs please refer to http://www.magentocommerce.com for more information.
 *
 * @category    Mage
 * @package     Mage_Dataflow
 * @copyright   Copyright (c) 2010 Magento Inc. (http://www.magentocommerce.com)
 * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */


/**
 * Convert action abstract
 *
 * Instances of this class are used as actions in profile
 *
 * @category   Mage
 * @package    Mage_Dataflow
 * @author      Magento Core Team <core@magentocommerce.com>
 */
abstract class Mage_Dataflow_Model_Convert_Action_Abstract
    implements Mage_Dataflow_Model_Convert_Action_Interface
{

    /**
     * Action parameters
     *
     * Hold information about action container
     *
     * @var array
     */
    protected $_params;

    /**
     * Reference to profile this action belongs to
     *
     * @var Mage_Dataflow_Model_Convert_Profile_Abstract
     */
    protected $_profile;

    protected $_actions = array();

    /**
     * Action's container
     *
     * @var Mage_Dataflow_Model_Convert_Container_Abstract
     */
    protected $_container;

    protected $_actionDefaultClass = 'Mage_Dataflow_Model_Convert_Action';

    /**
     * Get action parameter
     *
     * @param string $key
     * @param mixed $default
     * @return mixed
     */
    public function getParam($key, $default=null)
    {
        if (!isset($this->_params[$key])) {
            return $default;
        }
        return $this->_params[$key];
    }

    /**
     * Set action parameter
     *
     * @param string $key
     * @param mixed $value
     * @return Mage_Dataflow_Model_Convert_Action_Abstract
     */
    public function setParam($key, $value=null)
    {
        if (is_array($key) && is_null($value)) {
            $this->_params = $key;
        } else {
            $this->_params[$key] = $value;
        }
        return $this;
    }

    /**
     * Get all action parameters
     *
     * @return array
     */
    public function getParams()
    {
        return $this->_params;
    }

    /**
     * Set all action parameters
     *
     * @param array $params
     * @return Mage_Dataflow_Model_Convert_Action_Abstract
     */
    public function setParams($params)
    {
        $this->_params = $params;
        return $this;
    }

    /**
     * Get profile instance the action belongs to
     *
     * @return Mage_Dataflow_Model_Convert_Profile_Abstract
     */
    public function getProfile()
    {
        return $this->_profile;
    }

    /**
     * Set profile instance the action belongs to
     *
     * @param Mage_Dataflow_Model_Convert_Profile_Abstract $profile
     * @return Mage_Dataflow_Model_Convert_Action_Abstract
     */
    public function setProfile(Mage_Dataflow_Model_Convert_Profile_Interface $profile)
    {
        $this->_profile = $profile;
        return $this;
    }

    public function addAction(Mage_Dataflow_Model_Convert_Action_Interface $action=null)
    {
        if (is_null($action)) {
            $action = new $this->_actionDefaultClass();
        }
        $this->_actions[] = $action;
        $action->setProfile($this->getProfile());
        return $action;
    }

    /**
     * Set action's container
     *
     * @param Mage_Dataflow_Model_Convert_Container_Interface $container
     * @return Mage_Dataflow_Model_Convert_Action_Abstract
     */
    public function setContainer(Mage_Dataflow_Model_Convert_Container_Interface $container)
    {
        $this->_container = $container;
        $this->_container->setProfile($this->getProfile());
        $this->_container->setAction($this);
        return $this;
    }

    /**
     * Get action's container
     *
     * @param string $name
     * @return Mage_Dataflow_Model_Convert_Container_Abstract
     */
    public function getContainer($name=null)
    {
        if (!is_null($name)) {
            return $this->getProfile()->getContainer($name);
        }

        if (!$this->_container) {
            $class = $this->getParam('class');
            $this->setContainer(new $class());
        }
        return $this->_container;
    }

    public function importXml(Varien_Simplexml_Element $actionNode)
    {
        foreach ($actionNode->attributes() as $key=>$value) {
            $this->setParam($key, (string)$value);
        }

        if ($actionNode['use']) {
            $container = $this->getProfile()->getContainer((string)$actionNode['use']);
        } else {
            $this->setParam('class', $this->getClassNameByType((string)$actionNode['type']));
            $container = $action->getContainer();
        }
        $this->setContainer($container);
        if ($this->getParam('name')) {
            $this->getProfile()->addContainer($this->getParam('name'), $container);
        }
        foreach ($actionNode->var as $varNode) {
            $container->setVar((string)$varNode['name'], (string)$varNode);
        }
        foreach ($actionNode->action as $actionSubnode) {
            $action = $this->addAction();
            $action->importXml($actionSubnode);
        }

        return $this;
    }

    /**
     * Run current action
     *
     * @return Mage_Dataflow_Model_Convert_Action_Abstract
     */
    public function run(array $args=array())
    {
        if ($method = $this->getParam('method')) {
//            print $method;
            if (!is_callable(array($this->getContainer(), $method))) {
                $this->getContainer()->addException('Unable to run action method: '.$method, Mage_Dataflow_Model_Convert_Exception::FATAL);
            }

//            printf('<pre>call %s::%s()</pre>', __CLASS__, __FUNCTION__);
//            printf('<pre>call %s::%s()</pre>', get_class($this->getContainer()), $method);

//            print '<pre>CONTAINER = ';
//            print get_class($this->getContainer());
//            print '</pre>';

            $this->getContainer()->addException('Starting '.get_class($this->getContainer()).' :: '.$method);

            if ($this->getParam('from')) {
//                print '$this->getParam(\'from\') = ' . $this->getParam('from');
                $this->getContainer()->setData($this->getContainer($this->getParam('from'))->getData());
            }


            $this->getContainer()->$method($args);

            if ($this->getParam('to')) {
                $this->getContainer($this->getParam('to'))->setData($this->getContainer()->getData());
            }
        } else {
            $this->addException('No method specified', Mage_Dataflow_Model_Convert_Exception::FATAL);
        }
        return $this;
    }

    public function runActions(array $args=array())
    {
        if (empty($this->_actions)) {
            return $this;
        }
        foreach ($this->_actions as $action) {
            $action->run($args);
        }
        return $this;
    }
}