<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * 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@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Tool
 * @subpackage Framework
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id$
 */

/**
 * @see Zend_Tool_Framework_Registry_EnabledInterface
 */
require_once 'Zend/Tool/Framework/Registry/EnabledInterface.php';

/**
 * @see Zend_Tool_Framework_Registry
 */
require_once 'Zend/Tool/Framework/Registry.php';


/**
 * @category   Zend
 * @package    Zend_Tool
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
abstract class Zend_Tool_Framework_Client_Abstract implements Zend_Tool_Framework_Registry_EnabledInterface
{

    /**
     * @var Zend_Tool_Framework_Registry
     */
    protected $_registry = null;
    
    /**
     * @var callback|null
     */
    protected $_interactiveCallback = null;

    /**
     * @var bool
     */
    protected $_isInitialized = false;
    
    /**
     * @var Zend_Log
     */
    protected $_debugLogger = null;
    
    /**
     * getName() - Return the client name which can be used to 
     * query the manifest if need be.
     *
     * @return string The client name
     */
    abstract public function getName();
    
    /**
     * initialized() - This will initialize the client for use
     *
     */
    public function initialize()
    {
        // if its already initialized, no need to initialize again
        if ($this->_isInitialized) {
            return;
        }
        
        // this might look goofy, but this is setting up the 
        // registry for dependency injection into the client
        $registry = new Zend_Tool_Framework_Registry();
        $registry->setClient($this);
        
        // NOTE: at this moment, $this->_registry should contain
        // the registry object
        
        // run any preInit
        $this->_preInit();

        // setup the debug log
        if (!$this->_debugLogger instanceof Zend_Log) {
            require_once 'Zend/Log.php';
            require_once 'Zend/Log/Writer/Null.php';
            $this->_debugLogger = new Zend_Log(new Zend_Log_Writer_Null());
        }
        
        // let the loader load, then the repositories process whats been loaded
        $this->_registry->getLoader()->load();
        
        // process the action repository
        $this->_registry->getActionRepository()->process();
        
        // process the provider repository
        $this->_registry->getProviderRepository()->process();
        
        // process the manifest repository
        $this->_registry->getManifestRepository()->process();
        
        if ($this instanceof Zend_Tool_Framework_Client_Interactive_InputInterface) {
            require_once 'Zend/Tool/Framework/Client/Interactive/InputHandler.php';
        }
        
        if ($this instanceof Zend_Tool_Framework_Client_Interactive_OutputInterface) {
            $this->_registry->getResponse()->setContentCallback(array($this, 'handleInteractiveOutput'));
        }
        
    }


    /**
     * This method should be implemented by the client implementation to
     * construct and set custom inflectors, request and response objects.
     */
    protected function _preInit()
    {
    }

    /**
     * This method *must* be implemented by the client implementation to
     * parse out and setup the request objects action, provider and parameter
     * information.
     */
    abstract protected function _preDispatch();

    /**
     * This method should be implemented by the client implementation to
     * take the output of the response object and return it (in an client
     * specific way) back to the Tooling Client.
     */
    protected function _postDispatch()
    {
    }
    
    /**
     * setRegistry() - Required by the Zend_Tool_Framework_Registry_EnabledInterface
     * interface which ensures proper registry dependency resolution
     *
     * @param Zend_Tool_Framework_Registry_Interface $registry
     * @return Zend_Tool_Framework_Client_Abstract
     */
    public function setRegistry(Zend_Tool_Framework_Registry_Interface $registry)
    {
        $this->_registry = $registry;
        return $this;
    }
    
    /**
     * hasInteractiveInput() - Convienence method for determining if this
     * client can handle interactive input, and thus be able to run the 
     * promptInteractiveInput
     *
     * @return bool
     */
    public function hasInteractiveInput()
    {
        return ($this instanceof Zend_Tool_Framework_Client_Interactive_InputInterface);
    }
    
    public function promptInteractiveInput($inputRequest)
    {
        if (!$this->hasInteractiveInput()) {
            require_once 'Zend/Tool/Framework/Client/Exception.php';
            throw new Zend_Tool_Framework_Client_Exception('promptInteractive() cannot be called on a non-interactive client.');
        }
        
        $inputHandler = new Zend_Tool_Framework_Client_Interactive_InputHandler();
        $inputHandler->setClient($this);
        $inputHandler->setInputRequest($inputRequest);
        return $inputHandler->handle();

    }
    
    /**
     * This method should be called in order to "handle" a Tooling Client
     * request that has come to the client that has been implemented.
     */
    public function dispatch()
    {
        $this->initialize();
        
        try {

            $this->_preDispatch();

            if ($this->_registry->getRequest()->isDispatchable()) {

                if ($this->_registry->getRequest()->getActionName() == null) {
                    require_once 'Zend/Tool/Framework/Client/Exception.php';
                    throw new Zend_Tool_Framework_Client_Exception('Client failed to setup the action name.');
                }

                if ($this->_registry->getRequest()->getProviderName() == null) {
                    require_once 'Zend/Tool/Framework/Client/Exception.php';
                    throw new Zend_Tool_Framework_Client_Exception('Client failed to setup the provider name.');
                }

                $this->_handleDispatch();

            }

        } catch (Exception $exception) {
            $this->_registry->getResponse()->setException($exception);
        }

        $this->_postDispatch();
    }
    
    public function convertToClientNaming($string)
    {
        return $string;
    }
    
    public function convertFromClientNaming($string)
    {
        return $string;
    }
    
    protected function _handleDispatch()
    {
        // get the provider repository
        $providerRepository = $this->_registry->getProviderRepository();
        
        $request = $this->_registry->getRequest();
        
        // get the dispatchable provider signature
        $providerSignature = $providerRepository->getProviderSignature($request->getProviderName());
        
        // get the actual provider
        $provider = $providerSignature->getProvider();

        // ensure that we can pretend if this is a pretend request
        if ($request->isPretend() && (!$provider instanceof Zend_Tool_Framework_Provider_Pretendable)) {
            require_once 'Zend/Tool/Framework/Client/Exception.php';
            throw new Zend_Tool_Framework_Client_Exception('Dispatcher error - provider does not support pretend');  
        }
        
        // get the action name
        $actionName = $this->_registry->getRequest()->getActionName();

        if (!$actionableMethod = $providerSignature->getActionableMethodByActionName($actionName)) {
            require_once 'Zend/Tool/Framework/Client/Exception.php';
            throw new Zend_Tool_Framework_Client_Exception('Dispatcher error - actionable method not found');         
        }
        
        // get the actual method and param information
        $methodName       = $actionableMethod['methodName'];
        $methodParameters = $actionableMethod['parameterInfo'];

        // get the provider params
        $requestParameters = $this->_registry->getRequest()->getProviderParameters();
        
        // @todo This seems hackish, determine if there is a better way
        $callParameters = array();
        foreach ($methodParameters as $methodParameterName => $methodParameterValue) {
            if (!array_key_exists($methodParameterName, $requestParameters) && $methodParameterValue['optional'] == false) {
                if ($this instanceof Zend_Tool_Framework_Client_Interactive_InputInterface) {
                    $promptSting = $this->getMissingParameterPromptString($provider, $actionableMethod['action'], $methodParameterValue['name']);
                    $parameterPromptValue = $this->promptInteractiveInput($promptSting)->getContent();
                    if ($parameterPromptValue == null) {
                        require_once 'Zend/Tool/Framework/Client/Exception.php';
                        throw new Zend_Tool_Framework_Client_Exception('Value supplied for required parameter "' . $methodParameterValue['name'] . '" is empty');
                    }
                    $callParameters[] = $parameterPromptValue;
                } else {
                    require_once 'Zend/Tool/Framework/Client/Exception.php';
                    throw new Zend_Tool_Framework_Client_Exception('A required parameter "' . $methodParameterValue['name'] . '" was not supplied.');
                }
            } else {
                $callParameters[] = (array_key_exists($methodParameterName, $requestParameters)) ? $requestParameters[$methodParameterName] : $methodParameterValue['default'];
            }
        }
        
        if (($specialtyName = $this->_registry->getRequest()->getSpecialtyName()) != '_Global') {
            $methodName .= $specialtyName;
        }
        
        if (method_exists($provider, $methodName)) {
            call_user_func_array(array($provider, $methodName), $callParameters);
        } elseif (method_exists($provider, $methodName . 'Action')) {
            call_user_func_array(array($provider, $methodName . 'Action'), $callParameters);
        } else {
            require_once 'Zend/Tool/Framework/Client/Exception.php';
            throw new Zend_Tool_Framework_Client_Exception('Not a supported method.');
        }
    }

}