<?php

namespace Chill\PersonBundle\Controller;

use Chill\MainBundle\CRUD\Controller\ApiController;
use Chill\MainBundle\Serializer\Model\Collection;
use Chill\PersonBundle\AccompanyingPeriod\Suggestion\ReferralsSuggestionInterface;
use Chill\PersonBundle\Security\Authorization\AccompanyingPeriodVoter;
use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Chill\PersonBundle\Entity\AccompanyingPeriod;
use Chill\PersonBundle\Entity\AccompanyingPeriod\AccompanyingPeriodWork;
use Symfony\Component\HttpFoundation\Exception\BadRequestException;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
use Symfony\Component\Routing\Annotation\Route;
use Symfony\Component\Serializer\Normalizer\AbstractNormalizer;
use Symfony\Component\Validator\Validator\ValidatorInterface;
use Chill\PersonBundle\Privacy\AccompanyingPeriodPrivacyEvent;
use Chill\PersonBundle\Entity\Person;
use Chill\ThirdPartyBundle\Entity\ThirdParty;
use Symfony\Component\Serializer\Exception\RuntimeException;
use Chill\PersonBundle\Entity\AccompanyingPeriod\Resource;
use Chill\PersonBundle\Entity\AccompanyingPeriod\Comment;
use Chill\PersonBundle\Entity\SocialWork\SocialIssue;
use Chill\MainBundle\Entity\Scope;
use Chill\PersonBundle\Repository\AccompanyingPeriodACLAwareRepository;
use Symfony\Component\Workflow\Registry;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\ParamConverter;

final class AccompanyingCourseApiController extends ApiController
{
    private AccompanyingPeriodACLAwareRepository $accompanyingPeriodACLAwareRepository;
    private EventDispatcherInterface $eventDispatcher;
    private ValidatorInterface $validator;
    private Registry $registry;
    private ReferralsSuggestionInterface $referralAvailable;

    public function __construct(
        EventDispatcherInterface $eventDispatcher,
        ValidatorInterface $validator,
        Registry $registry,
        AccompanyingPeriodACLAwareRepository $accompanyingPeriodACLAwareRepository,
        ReferralsSuggestionInterface $referralAvailable
    ) {
        $this->eventDispatcher = $eventDispatcher;
        $this->validator = $validator;
        $this->registry = $registry;
        $this->accompanyingPeriodACLAwareRepository = $accompanyingPeriodACLAwareRepository;
        $this->referralAvailable = $referralAvailable;
    }

    public function confirmApi($id, Request $request, $_format): Response
    {
        /** @var AccompanyingPeriod $accompanyingPeriod */
        $accompanyingPeriod = $this->getEntity('participation', $id, $request);

        $this->checkACL('confirm', $request, $_format, $accompanyingPeriod);
        $workflow = $this->registry->get($accompanyingPeriod);

        if (FALSE === $workflow->can($accompanyingPeriod, 'confirm')) {
            // throw new BadRequestException('It is not possible to confirm this period');
            $errors = $this->validator->validate($accompanyingPeriod, null, [$accompanyingPeriod::STEP_CONFIRMED]);
            if( count($errors) > 0 ){
                return $this->json($errors, 422);
            }
        }

        $workflow->apply($accompanyingPeriod, 'confirm');

        $this->getDoctrine()->getManager()->flush();

        return $this->json($accompanyingPeriod, Response::HTTP_OK, [], [
            'groups' => [ 'read' ]
        ]);
    }

    public function participationApi($id, Request $request, $_format)
    {
        /** @var AccompanyingPeriod $accompanyingPeriod */
        $accompanyingPeriod = $this->getEntity('participation', $id, $request);
        $person = $this->getSerializer()
            ->deserialize($request->getContent(), Person::class, $_format, []);

        if (NULL === $person) {
            throw new BadRequestException('person id not found');
        }

        // TODO add acl
        //
        $this->onPostCheckACL('participation', $request, $_format, $accompanyingPeriod);

        switch ($request->getMethod()) {
            case Request::METHOD_POST:
                $participation = $accompanyingPeriod->createParticipationFor($person);
                break;
            case Request::METHOD_DELETE:
                $participation = $accompanyingPeriod->closeParticipationFor($person);
                break;
            default:
                throw new BadRequestException("This method is not supported");
        }

        $errors = $this->validator->validate($accompanyingPeriod);

        if ($errors->count() > 0) {
            // only format accepted
            return $this->json($errors, 422);
        }

        $this->getDoctrine()->getManager()->flush();

        return $this->json($participation, 200, [], ['groups' => [ 'read' ]]);
    }

    public function resourceApi($id, Request $request, string $_format): Response
    {
        $accompanyingPeriod = $this->getEntity('resource', $id, $request);
        $errors = $this->validator->validate($accompanyingPeriod);

        if ($errors->count() > 0) {
            return $this->json($errors, 422);
        }

        return $this->addRemoveSomething('resource', $id, $request, $_format, 'resource', Resource::class);
    }

    public function scopeApi($id, Request $request, string $_format): Response
    {
        return $this->addRemoveSomething('scope', $id, $request, $_format, 'scope', Scope::class, [ 'groups' => [ 'read' ] ]);
    }

    public function commentApi($id, Request $request, string $_format): Response
    {
        return $this->addRemoveSomething('comment', $id, $request, $_format, 'comment', Comment::class);
    }

    public function socialIssueApi($id, Request $request, string $_format): Response
    {
        return $this->addRemoveSomething('socialissue', $id, $request, $_format, 'socialIssue', SocialIssue::class, [ 'groups' => [ 'read' ] ]);
    }

    public function workApi($id, Request $request, string $_format): Response
    {
        return $this->addRemoveSomething(
            'work',
            $id,
            $request,
            $_format,
            'work',
            AccompanyingPeriodWork::class,
            [ 'groups' => [ 'accompanying_period_work:create' ] ],
            true // force persist
        );
    }

    public function requestorApi($id, Request $request, string $_format): Response
    {
        /** @var AccompanyingPeriod $accompanyingPeriod */
        $action = 'requestor';
        $accompanyingPeriod = $this->getEntity($action, $id, $request);
        // a requestor may be a person or a thirdParty

        $this->checkACL($action, $request, $_format, $accompanyingPeriod);
        $this->onPostCheckACL($action, $request, $_format, $accompanyingPeriod);

        if (Request::METHOD_DELETE === $request->getMethod()) {
            $accompanyingPeriod->setRequestor(NULL);
        } elseif (Request::METHOD_POST === $request->getMethod()) {
            $requestor = null;
            $exceptions = [];
            foreach ([Person::class, ThirdParty::class] as $class) {
                try {
                    $requestor = $this->getSerializer()
                        ->deserialize($request->getContent(), $class, $_format, []);
                } catch (RuntimeException $e) {
                    $exceptions[] = $e;
                }
            }
            if ($requestor === null) {
                throw new BadRequestException('Could not find any person or requestor', 0, $exceptions[0]);
            }

            $accompanyingPeriod->setRequestor($requestor);
        } else {
            throw new BadRequestException('method not supported');
        }

        $errors = $this->validator->validate($accompanyingPeriod);

        if ($errors->count() > 0) {
            // only format accepted
            return $this->json($errors, 422);
        }

        $this->getDoctrine()->getManager()->flush();

        return $this->json($accompanyingPeriod->getRequestor(), 200, [], ['groups' => [ 'read']]);
    }

    protected function onPostCheckACL(string $action, Request $request, string $_format, $entity): ?Response
    {
        $this->eventDispatcher->dispatch(
            AccompanyingPeriodPrivacyEvent::ACCOMPANYING_PERIOD_PRIVACY_EVENT,
            new AccompanyingPeriodPrivacyEvent($entity, [
                'action' => $action,
                'request' => $request->getMethod()
            ])
        );

        return null;
    }

    /**
     * @ParamConverter("person", options={"id" = "person_id"})
     */
    public function getAccompanyingPeriodsByPerson(Person $person){
        $accompanyingPeriods = $person->getCurrentAccompanyingPeriods();
        $accompanyingPeriodsChecked = array_filter($accompanyingPeriods,
            function(AccompanyingPeriod $period){
                return $this->isGranted(AccompanyingPeriodVoter::SEE, $period);
            });
        return $this->json(\array_values($accompanyingPeriodsChecked), Response::HTTP_OK, [], ['groups' => [ 'read']]);
    }

    /**
     * @Route("/api/1.0/person/accompanying-course/{id}/referrers-suggested.{_format}",
     *     requirements={ "_format"="json"},
     *     name="chill_api_person_accompanying_period_referrers_suggested")
     * @param AccompanyingPeriod $period
     * @return JsonResponse
     */
    public function suggestReferrals(AccompanyingPeriod $period, string $_format = 'json'): JsonResponse
    {
        $this->denyAccessUnlessGranted(AccompanyingPeriodVoter::EDIT, $period);

        $total = $this->referralAvailable->countReferralSuggested($period);
        $paginator = $this->getPaginatorFactory()->create($total);

        if (0 < $total) {
            $users = $this->referralAvailable->findReferralSuggested($period, $paginator->getItemsPerPage(),
                $paginator->getCurrentPageFirstItemNumber());
        } else {
            $users = [];
        }

        return $this->json(new Collection($users, $paginator), Response::HTTP_OK,
            [], [ AbstractNormalizer::GROUPS => [ 'read' ]]);
    }
}