<?php

/*

 * This file is part of the Symfony framework.

 *

 * (c) Fabien Potencier <fabien@symfony.com>

 *

 * This source file is subject to the MIT license that is bundled

 * with this source code in the file LICENSE.

 */

namespace Symfony\Bundle\TwigBundle\DependencyInjection;

use Symfony\Component\Config\Definition\Builder\ArrayNodeDefinition;

use Symfony\Component\Config\Definition\Builder\TreeBuilder;

use Symfony\Component\Config\Definition\ConfigurationInterface;

/**

 * TwigExtension configuration structure.

 *

 * @author Jeremy Mikola <jmikola@gmail.com>

 */

class Configuration implements ConfigurationInterface

{

    /**

     * Generates the configuration tree builder.

     *

     * @return \Symfony\Component\Config\Definition\Builder\TreeBuilder The tree builder

     */

    public function getConfigTreeBuilder()

    {

        $treeBuilder = new TreeBuilder();

        $rootNode = $treeBuilder->root('twig');

        $rootNode

            ->children()

                ->scalarNode('exception_controller')->defaultValue('Symfony\\Bundle\\TwigBundle\\Controller\\ExceptionController::showAction')->end()

            ->end()

        ;

        $this->addFormSection($rootNode);

        $this->addGlobalsSection($rootNode);

        $this->addTwigOptions($rootNode);

        return $treeBuilder;

    }

    private function addFormSection(ArrayNodeDefinition $rootNode)

    {

        $rootNode

            ->children()

                ->arrayNode('form')

                    ->addDefaultsIfNotSet()

                    ->fixXmlConfig('resource')

                    ->children()

                        ->arrayNode('resources')

                            ->addDefaultsIfNotSet()

                            ->defaultValue(array('form_div_layout.html.twig'))

                            ->validate()

                                ->ifTrue(function($v) { return !in_array('form_div_layout.html.twig', $v); })

                                ->then(function($v){

                                    return array_merge(array('form_div_layout.html.twig'), $v);

                                })

                            ->end()

                            ->prototype('scalar')->end()

                        ->end()

                    ->end()

                ->end()

            ->end()

        ;

    }

    private function addGlobalsSection(ArrayNodeDefinition $rootNode)

    {

        $rootNode

            ->fixXmlConfig('global')

            ->children()

                ->arrayNode('globals')

                    ->useAttributeAsKey('key')

                    ->prototype('array')

                        ->beforeNormalization()

                            ->ifTrue(function($v){ return is_string($v) && '@' === substr($v, 0, 1); })

                            ->then(function($v){ return array('id' => substr($v, 1), 'type' => 'service'); })

                        ->end()

                        ->beforeNormalization()

                            ->ifTrue(function($v){

                                if (is_array($v)) {

                                    $keys = array_keys($v);

                                    sort($keys);

                                    return $keys !== array('id', 'type') && $keys !== array('value');

                                }

                                return true;

                            })

                            ->then(function($v){ return array('value' => $v); })

                        ->end()

                        ->children()

                            ->scalarNode('id')->end()

                            ->scalarNode('type')

                                ->validate()

                                    ->ifNotInArray(array('service'))

                                    ->thenInvalid('The %s type is not supported')

                                ->end()

                            ->end()

                            ->variableNode('value')->end()

                        ->end()

                    ->end()

                ->end()

            ->end()

        ;

    }

    private function addTwigOptions(ArrayNodeDefinition $rootNode)

    {

        $rootNode

            ->children()

                ->scalarNode('autoescape')->end()

                ->scalarNode('base_template_class')->end()

                ->scalarNode('cache')->defaultValue('%kernel.cache_dir%/twig')->end()

                ->scalarNode('charset')->defaultValue('%kernel.charset%')->end()

                ->scalarNode('debug')->defaultValue('%kernel.debug%')->end()

                ->scalarNode('strict_variables')->end()

                ->scalarNode('auto_reload')->end()

            ->end()

        ;

    }

}