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<?php

namespace AppBundle\Controller\Rest;

use AppBundle\Entity\Candidate;
use AppBundle\Event\CandidateApplyForJobEvent;
use AppBundle\Repository\JobRepository;
use FOS\RestBundle\Controller\Annotations\Get;
use FOS\RestBundle\Controller\Annotations\Link;
use FOS\RestBundle\Controller\Annotations\Route;
use FOS\RestBundle\Controller\FOSRestController;
use FOS\RestBundle\View\View;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
use Symfony\Component\HttpKernel\Exception\ConflictHttpException;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;

/**
 * @Route(service="app.controller.job")
 */
class JobController extends FOSRestController implements TokenAuthenticatedController
{
    private $repository;
    private $dispatcher;

    /**
     * JobController constructor.
     *
     * @param JobRepository             $repository
     * @param EventDispatcherInterface  $dispatcher
     */
    public function __construct(JobRepository $repository, EventDispatcherInterface $dispatcher) {
        $this->repository = $repository;
        $this->dispatcher = $dispatcher;
    }

    /**
     * @Get("/job/{id}", name="get_job", options={"method_prefix" = false})
     *
     * @return View
     */
    public function getAction($id)
    {
        if (null == $job = $this->repository->find($id)) {
            throw new NotFoundHttpException("No job with id=$id was found");
        }

        return $this->view($job, Response::HTTP_OK);
    }

    /**
     * @Get("/jobs/count", name="jobs_count", options={"method_prefix" = false})
     *
     * @return View
     */
    public function countAction()
    {
        $count = $this->repository->countActivated();

        return $this->view(['count' => $count], Response::HTTP_OK);
    }

    /**
     * @Link("/job/{id}/candidate", name="link_candidate_to_job", options={"method_prefix" = false})
     *
     * @return View
     *
     * @throws NotFoundHttpException
     * @throws BadRequestHttpException
     * @throws ConflictHttpException
     */
    public function linkCandidateAction($id, Request $request)
    {
        if (null == $job = $this->repository->find($id)) {
            throw new NotFoundHttpException("No job with id=$id was found");
        }

        if (!$request->headers->has('link')) {
            throw new BadRequestHttpException('Link header was not set');
        }

        foreach ($request->attributes->get('link') as $candidate) {
            if (!$candidate instanceof Candidate) {
                throw new NotFoundHttpException('Link contains invalid resource');
            }

            if ($job->hasCandidate($candidate)) {
                throw new ConflictHttpException('Candidate has already been applied for this job');
            }

            $job->addCandidate($candidate);
            $this->repository->save($job);

            $event = new CandidateApplyForJobEvent($candidate, $job);
            $event->addAttachment($candidate->getResumeFile());
            $this->dispatcher->dispatch(
                CandidateApplyForJobEvent::APP_CANDIDATE_APPLY,
                $event
            );
        }

        return $this->view(null, Response::HTTP_OK);
    }
}