<?php

declare(strict_types=1);

/*
 * Chill is a software for social workers
 *
 * For the full copyright and license information, please view
 * the LICENSE file that was distributed with this source code.
 */

namespace Chill\PersonBundle\Controller;

use Chill\PersonBundle\Entity\AccompanyingPeriod;
use Chill\PersonBundle\Entity\Person;
use Chill\PersonBundle\Form\AccompanyingPeriodType;
use Chill\PersonBundle\Privacy\PrivacyEvent;
use Chill\PersonBundle\Repository\AccompanyingPeriodACLAwareRepositoryInterface;
use Chill\PersonBundle\Security\Authorization\AccompanyingPeriodVoter;
use Chill\PersonBundle\Security\Authorization\PersonVoter;
use DateTime;
use Doctrine\DBAL\Exception;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\ParamConverter;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Validator\ConstraintViolationListInterface;
use Symfony\Component\Validator\Validator\ValidatorInterface;

use function array_filter;
use function count;

/**
 * Class AccompanyingPeriodController.
 */
class AccompanyingPeriodController extends AbstractController
{
    protected AccompanyingPeriodACLAwareRepositoryInterface $accompanyingPeriodACLAwareRepository;

    /**
     * @var EventDispatcherInterface
     */
    protected $eventDispatcher;

    /**
     * @var ValidatorInterface
     */
    protected $validator;

    public function __construct(
        AccompanyingPeriodACLAwareRepositoryInterface $accompanyingPeriodACLAwareRepository,
        EventDispatcherInterface $eventDispatcher,
        ValidatorInterface $validator
    ) {
        $this->accompanyingPeriodACLAwareRepository = $accompanyingPeriodACLAwareRepository;
        $this->eventDispatcher = $eventDispatcher;
        $this->validator = $validator;
    }

    /**
     * @throws \Exception
     */
    public function closeAction(int $person_id, Request $request): Response
    {
        $person = $this->_getPerson($person_id);

        $this->denyAccessUnlessGranted(PersonVoter::UPDATE, $person, 'You are not allowed to update this person');

        if ($person->isOpen() === false) {
            $this->get('session')->getFlashBag()
                ->add('error', $this->get('translator')
                    ->trans(
                        'Beware period is closed',
                        ['%name%' => $person->__toString()]
                    ));

            return $this->redirect(
                $this->generateUrl('chill_person_accompanying_period_list', [
                    'person_id' => $person->getId(),
                ])
            );
        }

        $current = $person->getCurrentAccompanyingPeriod();

        $form = $this->createForm(AccompanyingPeriodType::class, $current, [
            'period_action' => 'close',
            'center' => $person->getCenter(),
        ]);

        if ($request->getMethod() === 'POST') {
            $form->handleRequest($request);

            if ($form->isValid()) {
                $person->close($current);
                $errors = $this->_validatePerson($person);

                if (count($errors) === 0) {
                    $this->get('session')->getFlashBag()
                        ->add('success', $this->get('translator')
                            ->trans('An accompanying period has been closed.', [
                                '%name%' => $person->__toString(),
                            ]));

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

                    return $this->redirect(
                        $this->generateUrl('chill_person_accompanying_period_list', [
                            'person_id' => $person->getId(),
                        ])
                    );
                }
                $this->get('session')->getFlashBag()
                    ->add('error', $this->get('translator')
                        ->trans('Error! Period not closed!'));

                foreach ($errors as $error) {
                    $this->get('session')->getFlashBag()
                        ->add('info', $error->getMessage());
                }
            } else { //if form is not valid
                $this->get('session')->getFlashBag()
                    ->add(
                        'error',
                        $this->get('translator')
                            ->trans('Pediod closing form is not valid')
                    );

                foreach ($form->getErrors() as $error) {
                    $this->get('session')->getFlashBag()
                        ->add('info', $error->getMessage());
                }
            }
        }

        return $this->render('ChillPersonBundle:AccompanyingPeriod:form.html.twig', [
            'form' => $form->createView(),
            'person' => $person,
            'accompanying_period' => $current,
        ]);
    }

    public function createAction(int $person_id, Request $request): Response
    {
        $person = $this->_getPerson($person_id);

        $this->denyAccessUnlessGranted(
            PersonVoter::UPDATE,
            $person,
            'You are not allowed to update this person'
        );

        $accompanyingPeriod = new AccompanyingPeriod(new DateTime('now'));
        $accompanyingPeriod->setClosingDate(new DateTime('now'));

        $accompanyingPeriod->addPerson($person);
        //or $person->addAccompanyingPeriod($accompanyingPeriod);

        $form = $this->createForm(
            AccompanyingPeriodType::class,
            $accompanyingPeriod,
            [
                'period_action' => 'create',
                'center' => $person->getCenter(),
            ]
        );

        if ($request->getMethod() === 'POST') {
            $form->handleRequest($request);
            $errors = $this->_validatePerson($person);
            $flashBag = $this->get('session')->getFlashBag();

            if (
                $form->isValid(['Default', 'closed'])
                && count($errors) === 0
            ) {
                $em = $this->getDoctrine()->getManager();
                $em->persist($accompanyingPeriod);
                $em->flush();
                $flashBag->add(
                    'success',
                    $this->get('translator')->trans(
                        'A period has been created.'
                    )
                );

                return $this->redirect(
                    $this->generateUrl('chill_person_accompanying_period_list', [
                        'person_id' => $person->getId(),
                    ])
                );
            }
            $flashBag->add('error', $this->get('translator')
                ->trans('Error! Period not created!'));

            foreach ($errors as $error) {
                $flashBag->add('info', $error->getMessage());
            }
        }

        return $this->render('ChillPersonBundle:AccompanyingPeriod:form.html.twig', [
            'form' => $form->createView(),
            'person' => $person,
            'accompanying_period' => $accompanyingPeriod,
        ]);
    }

    /**
     * @ParamConverter("person", options={"id": "person_id"})
     */
    public function listAction(Person $person): Response
    {
        $this->denyAccessUnlessGranted(AccompanyingPeriodVoter::SEE, $person);

        $event = new PrivacyEvent($person, [
            'element_class' => AccompanyingPeriod::class,
            'action' => 'list',
        ]);
        $this->eventDispatcher->dispatch(PrivacyEvent::PERSON_PRIVACY_EVENT, $event);

        $accompanyingPeriodsRaw = $this->accompanyingPeriodACLAwareRepository
            ->findByPerson($person, AccompanyingPeriodVoter::SEE);

        usort($accompanyingPeriodsRaw, static function ($a, $b) {
            return $b->getOpeningDate() > $a->getOpeningDate();
        });

        // filter visible or not visible
        $accompanyingPeriods = array_filter($accompanyingPeriodsRaw, function (AccompanyingPeriod $ap) {
            return $this->isGranted(AccompanyingPeriodVoter::SEE, $ap);
        });

        return $this->render('@ChillPerson/AccompanyingPeriod/list.html.twig', [
            'accompanying_periods' => $accompanyingPeriods,
            'person' => $person,
        ]);
    }

    public function openAction(int $person_id, Request $request): Response
    {
        $person = $this->_getPerson($person_id);

        $this->denyAccessUnlessGranted(
            PersonVoter::UPDATE,
            $person,
            'You are not allowed to update this person'
        );

        //in case the person is already open
        if ($person->isOpen()) {
            $this->get('session')->getFlashBag()
                ->add('error', $this->get('translator')
                    ->trans(
                        'Error! Period %name% is not closed ; it can be open',
                        ['%name%' => $person->__toString()]
                    ));

            return $this->redirect(
                $this->generateUrl('chill_person_accompanying_period_list', [
                    'person_id' => $person->getId(),
                ])
            );
        }

        $accompanyingPeriod = new AccompanyingPeriod(new DateTime());

        $form = $this->createForm(
            AccompanyingPeriodType::class,
            $accompanyingPeriod,
            [
                'period_action' => 'open',
                'center' => $person->getCenter(),
            ]
        );

        if ($request->getMethod() === 'POST') {
            $form->handleRequest($request);

            if ($form->isValid()) {
                $person->open($accompanyingPeriod);

                $errors = $this->_validatePerson($person);

                if (count($errors) <= 0) {
                    $this->get('session')->getFlashBag()
                        ->add('success', $this->get('translator')
                            ->trans(
                                'An accompanying period has been opened.',
                                ['%name%' => $person->__toString()]
                            ));

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

                    return $this->redirect(
                        $this->generateUrl('chill_person_accompanying_period_list', [
                            'person_id' => $person->getId(),
                        ])
                    );
                }
                $this->get('session')->getFlashBag()
                    ->add('error', $this->get('translator')
                        ->trans('Period not opened'));

                foreach ($errors as $error) {
                    $this->get('session')->getFlashBag()
                        ->add('info', $error->getMessage());
                }
            } else { // if errors in forms
                $this->get('session')->getFlashBag()
                    ->add(
                        'error',
                        $this->get('translator')
                            ->trans('Period not opened : form is invalid')
                    );
            }
        }

        return $this->render('ChillPersonBundle:AccompanyingPeriod:form.html.twig', [
            'form' => $form->createView(),
            'person' => $person,
            'accompanying_period' => $accompanyingPeriod,
        ]);
    }

    public function reOpenAction(int $person_id, int $period_id, Request $request): Response
    {
        /** @var Person $person */
        $person = $this->_getPerson($person_id);

        /** @var AccompanyingPeriod $period */
        $period = array_filter(
            $person->getAccompanyingPeriods(),
            static function (AccompanyingPeriod $p) use ($period_id) {
                return $p->getId() === ($period_id);
            }
        )[0] ?? null;

        if (null === $period) {
            throw $this->createNotFoundException('period not found');
        }

        $confirm = $request->query->getBoolean('confirm', false);

        if (true === $confirm && $period->canBeReOpened($person)) {
            $period->reOpen();

            $this->_validatePerson($person);

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

            $this->addFlash('success', $this->get('translator')->trans(
                'The period has been re-opened'
            ));

            return $this->redirectToRoute('chill_person_accompanying_period_list', [
                'person_id' => $person->getId(),
            ]);
        }

        if (false === $confirm && $period->canBeReOpened($person)) {
            return $this->render('ChillPersonBundle:AccompanyingPeriod:re_open.html.twig', [
                'period' => $period,
                'person' => $person,
            ]);
        }

        return (new Response())
            ->setStatusCode(Response::HTTP_BAD_REQUEST)
            ->setContent('You cannot re-open this period');
    }

    /**
     * @throws Exception
     */
    public function updateAction(int $person_id, int $period_id, Request $request): Response
    {
        $em = $this->getDoctrine()->getManager();

        /** @var AccompanyingPeriod $accompanyingPeriod */
        $accompanyingPeriod = $em->getRepository(AccompanyingPeriod::class)->find($period_id);

        if (null === $accompanyingPeriod) {
            throw $this->createNotFoundException('Period with id ' . $period_id . ' is not found');
        }

        /** @var Person $person */
        $person = $this->_getPerson($person_id);

        // CHECK
        if (!$accompanyingPeriod->containsPerson($person)) {
            throw new Exception('Accompanying period ' . $period_id . ' does not contain person ' . $person_id);
        }

        $this->denyAccessUnlessGranted(
            PersonVoter::UPDATE,
            $person,
            'You are not allowed to update this person'
        );

        $form = $this->createForm(
            AccompanyingPeriodType::class,
            $accompanyingPeriod,
            [
                'period_action' => 'update',
                'center' => $person->getCenter(),
            ]
        );

        if ($request->getMethod() === 'POST') {
            $form->handleRequest($request);
            $errors = $this->_validatePerson($person);
            $flashBag = $this->get('session')->getFlashBag();

            if (
                $form->isValid(['Default', 'closed'])
                    && count($errors) === 0
            ) {
                $em->flush();

                $flashBag->add(
                    'success',
                    $this->get('translator')->trans('An accompanying period has been updated.')
                );

                return $this->redirect(
                    $this->generateUrl('chill_person_accompanying_period_list', [
                        'person_id' => $person->getId(),
                    ])
                );
            }

            $flashBag->add('error', $this->get('translator')
                ->trans('Error when updating the period'));

            foreach ($errors as $error) {
                $flashBag->add('info', $error->getMessage());
            }
        }

        return $this->render('ChillPersonBundle:AccompanyingPeriod:form.html.twig', [
            'form' => $form->createView(),
            'person' => $person,
            'accompanying_period' => $accompanyingPeriod,
        ]);
    }

    /**
     * @throws \Symfony\Component\HttpKernel\Exception\NotFoundHttpException
     */
    private function _getPerson(int $id): Person
    {
        $person = $this->getDoctrine()->getManager()
            ->getRepository(\Chill\PersonBundle\Entity\Person::class)->find($id);

        if (null === $person) {
            throw $this->createNotFoundException('Person not found');
        }

        $this->denyAccessUnlessGranted(
            PersonVoter::SEE,
            $person,
            'You are not allowed to see this person'
        );

        return $person;
    }

    private function _validatePerson(Person $person): ConstraintViolationListInterface
    {
        $errors = $this->validator->validate(
            $person,
            null,
            ['Default']
        );

        // Can be disabled with config
        if (false === $this->container->getParameter('chill_person.allow_multiple_simultaneous_accompanying_periods')) {
            $errors_accompanying_period = $this->validator->validate(
                $person,
                null,
                ['accompanying_period_consistent']
            );

            foreach ($errors_accompanying_period as $error) {
                $errors->add($error);
            }
        }

        return $errors;
    }
}