<?php

    /**
     * NRE
     *
     * @author      coderkun <olli@coderkun.de>
     * @copyright   2013 coderkun (http://www.coderkun.de)
     * @license     http://www.gnu.org/licenses/gpl.html
     * @link        http://www.coderkun.de/projects/nre
     */

    namespace nre\apis;


    /**
     * WebApi-implementation.
     * 
     * This class runs and renders an web-applictaion.
     * 
     * @author  coderkun <olli@coderkun.de>
     */
    class WebApi extends \nre\core\Api
    {


        /**
         * Construct a new WebApi.
         */
        public function __construct()
        {
            parent::__construct(
                new \nre\requests\WebRequest(),
                new \nre\responses\WebResponse()
            );

            // Add routes
            $this->addRoutes();

            // Disable screen logging for AJAX requests
            if($this->request->getParam(0, 'toplevel') == 'ajax') {
                $this->log->disableAutoLogToScreen();
            }
        }


        /**
         * Run application.
         * 
         * This method runs the application and handles all errors.
         */
        public function run()
        {
            try {
                $exception = parent::run();

                if(!is_null($exception)) {
                    $this->errorService($exception);
                }
            }
            catch(\nre\exceptions\ServiceUnavailableException $e) {
                $this->errorService($e);
            }
            catch(\nre\exceptions\ActionNotFoundException $e) {
                $this->error($e, \nre\core\WebUtils::HTTP_NOT_FOUND);
            }
            catch(\nre\exceptions\FatalDatamodelException $e) {
                $this->errorService($e);
            }
            catch(\nre\exceptions\DatamodelException $e) {
                $this->error($e, \nre\core\WebUtils::HTTP_SERVICE_UNAVAILABLE);
             }
            catch(\nre\exceptions\DriverNotValidException $e) {
                $this->error($e, \nre\core\WebUtils::HTTP_SERVICE_UNAVAILABLE);
             }
            catch(\nre\exceptions\DriverNotFoundException $e) {
                $this->error($e, \nre\core\WebUtils::HTTP_SERVICE_UNAVAILABLE);
             }
            catch(\nre\exceptions\ModelNotValidException $e) {
                $this->error($e, \nre\core\WebUtils::HTTP_SERVICE_UNAVAILABLE);
             }
             catch(\nre\exceptions\ModelNotFoundException $e) {
                 $this->error($e, \nre\core\WebUtils::HTTP_SERVICE_UNAVAILABLE);
             }
             catch(\nre\exceptions\ViewNotFoundException $e) {
                 $this->error($e, \nre\core\WebUtils::HTTP_NOT_FOUND);
             }
            catch(\nre\exceptions\ControllerNotValidException $e) {
                $this->error($e, \nre\core\WebUtils::HTTP_SERVICE_UNAVAILABLE);
            }
            catch(\nre\exceptions\ControllerNotFoundException $e) {
                $this->error($e, \nre\core\WebUtils::HTTP_NOT_FOUND);
            }
            catch(\nre\exceptions\AgentNoaatValidException $e) {
                $this->error($e, \nre\core\WebUtils::HTTP_SERVICE_UNAVAILABLE);
            }
            catch(\nre\exceptions\AgentNotFoundException $e) {
                $this->error($e, \nre\core\WebUtils::HTTP_NOT_FOUND);
            }
            catch(\nre\exceptions\ClassNotValidException $e) {
                $this->errorService($e);
            }
            catch(\nre\exceptions\ClassNotFoundException $e) {
                $this->errorService($e);
            }
        }


        /**
         * Render output.
         */
        public function render()
        {
            // Generate output
            parent::render();


            // Set HTTP-header
            $this->response->header();

            // Show output
            echo $this->response->getOutput();
        }


        /**
         * Add routes (normal and reverse) defined in the AppConfig.
         */
        private function addRoutes()
        {
            // Normal routes
            if(property_exists('\nre\configs\AppConfig', 'routes')) {
                foreach(\nre\configs\AppConfig::$routes as &$route) {
                    $this->request->addRoute($route[0], $route[1], $route[2]);
                }
            }

            // Reverse routes
            if(property_exists('\nre\configs\AppConfig', 'reverseRoutes')) {
                foreach(\nre\configs\AppConfig::$reverseRoutes as &$route) {
                    $this->request->addReverseRoute($route[0], $route[1], $route[2]);
                }
            }

            // Revalidate request
            $this->request->revalidate();
        }


        /**
         * Handle an error that orrcurred during the
         * loading/constructing/running of the ToplevelAgent.
         * 
         * @param   \Exception  $exception      Occurred exception
         * @param   int         $httpStatusCode HTTP-statuscode
         */
        private function error(\nre\core\Exception $exception, $httpStatusCode)
        {
            // Log error message
            $this->log($exception, \nre\core\Logger::LOGMODE_AUTO);

            try {
                // Set agent for handling errors
                $this->response->clearParams();
                $this->response->addParams(
                    \nre\configs\AppConfig::$defaults['toplevel-error'],
                    \nre\configs\AppConfig::$defaults['intermediate-error'],
                    \nre\configs\CoreConfig::$defaults['action'],
                    $httpStatusCode
                );

                // Run this agent
                parent::run();
            }
            catch(\nre\exceptions\ServiceUnavailableException $e) {
                $this->errorService($e);
            }
            catch(\nre\exceptions\ActionNotFoundException $e) {
                $this->errorService($e);
            }
            catch(\nre\exceptions\DatamodelException $e) {
                $this->errorService($e);
             }
            catch(\nre\exceptions\DriverNotValidException $e) {
                $this->errorService($e);
             }
            catch(\nre\exceptions\DriverNotFoundException $e) {
                $this->errorService($e);
             }
            catch(\nre\exceptions\ModelNotValidException $e) {
                $this->errorService($e);
             }
             catch(\nre\exceptions\ModelNotFoundException $e) {
                 $this->errorService($e);
             }
             catch(\nre\exceptions\ViewNotFoundException $e) {
                 $this->errorService($e);
             }
            catch(\nre\exceptions\ControllerNotValidException $e) {
                $this->errorService($e);
            }
            catch(\nre\exceptions\ControllerNotFoundException $e) {
                $this->errorService($e);
            }
            catch(\nre\exceptions\AgentNotValidException $e) {
                $this->errorService($e);
            }
            catch(\nre\exceptions\AgentNotFoundException $e) {
                $this->errorService($e);
            }
            catch(Exception $e) {
                $this->errorService($e);
            }
        }


        /**
         * Handle a error which cannot be handles by the system (and
         * HTTP 503).
         * 
         * @param   \Exception  $exception  Occurred exception
         */
        private function errorService($exception)
        {
            // Log error message
            $this->log($exception, \nre\core\Logger::LOGMODE_AUTO);

            // Set HTTP-rtatuscode
            $this->response->addHeader(\nre\core\WebUtils::getHttpHeader(503));


            // Read and print static error file
            $fileName = ROOT.DS.\nre\configs\CoreConfig::getClassDir('views').DS.\nre\configs\CoreConfig::$defaults['errorFile'].\nre\configs\CoreConfig::getFileExt('views');
            ob_start();
            include($fileName);
            $this->response->setOutput(ob_get_clean());


            // Prevent further execution
            $this->response->setExit();
        }

    }

?>