<?php

use Symfony\Component\Routing\Matcher\UrlMatcher;
use Symfony\Component\Routing\RequestContext;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpKernel\HttpKernel;
use Symfony\Component\HttpKernel\Kernel;
use Symfony\Component\EventDispatcher\EventDispatcher;
use Symfony\Component\HttpKernel\Controller\ControllerResolver;
use Symfony\Component\HttpKernel\EventListener\RouterListener;
use Symfony\Component\Config\FileLocator;
use Symfony\Component\Routing\Loader\YamlFileLoader;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\EventDispatcher\ContainerAwareEventDispatcher;


class CKRouter {
    function __construct() {
        #FIXME clean the routing path. Ugly.
        $yml = new YamlFileLoader(new FileLocator($currentPath = __DIR__ . '/../../../'));

        #importing routing from yml file. Symfony syntax.
        $this->routes = $yml->load('routing.yml');

        $this->matcher = new UrlMatcher($this->routes, new RequestContext());

        #dispatcher for the route resolution
        $container = new ContainerBuilder();
        $this->dispatcher = new ContainerAwareEventDispatcher($container);

        $this->dispatcher->addSubscriber(new RouterListener($this->matcher));

        #default Controller resolver.
        $this->resolver = new ControllerResolver();

        $this->kernel = new HttpKernel($this->dispatcher, $this->resolver);
    }

    function run() {
        $request = Request::createFromGlobals();

        #separate those for unit testing purposes.
        $response = $this->_run($request);
        $this->_output($response);

        $kernel->terminate($request, $response);
    }

    function _run($request) {
        $response = $this->kernel->handle($request);
        return $response;
    }

    function _output($response) {
        $response->send();
    }

}