<?php

namespace Chill\TaskBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Chill\TaskBundle\Repository\SingleTaskRepository;
use Chill\TaskBundle\Security\Authorization\TaskVoter;
use Symfony\Component\Workflow\Registry;
use Symfony\Component\HttpFoundation\Response;
use Doctrine\ORM\EntityManagerInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Routing\Annotation\Route;


class TaskController extends Controller
{
    /**
     * Apply a transition to a task
     *
     * @Route(
     *  "/{_locale}/task/transition/{kind}/{taskId}/{transition}",
     *  name="chill_task_task_transition"
     * )
     *
     * @param string $kind
     * @param int $taskId
     * @param string $transition
     * @param SingleTaskRepository $singleTaskRepository
     * @param Registry $registry
     * @param EntityManagerInterface $em
     * @param Request $request
     * @return Response
     */
    public function applyTransitionAction(
        $kind,
        $taskId,
        $transition,
        SingleTaskRepository $singleTaskRepository,
        Registry $registry,
        EntityManagerInterface $em,
        Request $request
    ) {
        switch ($kind) {
            case 'single-task':
                $task = $singleTaskRepository
                    ->find($taskId)
                    ;
                $defaultReturnPath = $this->generateUrl(
                    'chill_task_singletask_list',
                    [ 'person_id' => $task->getPerson() ]
                    );
                break;
            default:
                return new Response("The type '$kind' is not implemented",
                    Response::HTTP_BAD_REQUEST);
        }

        if (NULL === $task) {
            $this->createNotFoundException("task with id '$taskId' and type "
                . "'$type' does not exists");
        }

        // we simply check that the user can see the task. Other ACL checks
        // should be performed using `guard` events.
        $this->denyAccessUnlessGranted(TaskVoter::SHOW, $task);

        $workflow = $registry->get($task);

        if ($workflow->can($task, $transition)) {
            $workflow->apply($task, $transition);

            $em->flush();

            $this->addFlash('success', 'The transition is sucessfully appliyed');

        } else {
            $this->addFlash('error', 'The transition could not be appliyed');
        }

        return $this->redirect($request->query->get('return_path', $defaultReturnPath));
    }
}