<?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;


class TaskController extends Controller
{
    public function applyTransitionAction(
        $type, 
        $taskId,
        $transition,
        SingleTaskRepository $singleTaskRepository,
        Registry $registry,
        EntityManagerInterface $em,
        Request $request
    ) {
        switch ($type) {
            case 'single-task':
                $task = $singleTaskRepository
                    ->find($taskId)
                    ;
                $defaultReturnPath = $this->generateUrl(
                    'chill_task_task_list_by_person',
                    [ 'personId' => $task->getPerson() ]
                    );
                break;
            default:
                return new Response("The type '$type' is not implemented", 
                    Response::HTTP_BAD_REQUEST);
        }
        
        if (NULL === $task) {
            $this->createHttpNotFoundException("task with id '$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.
        $this->denyAccessUnlessGranted($task, TaskVoter::SHOW);
        
        $workflow = $registry->get($task);
        
        if ($workflow->can($task, $transition)) {
            $workflow->apply($task, $transition);
            
            $em->flush();
            
            $this->addFlash('success', 'The transition is sucessfully applyed');

        } else {
            $this->addFlash('error', 'The transition could not be applyed');
        }
        
        return $this->redirect($request->query->get('return_path', $defaultReturnPath));
    }
}