<?php

/**
 * 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.
 *
 * @see https://www.champs-libres.coop/
 */

declare(strict_types=1);

namespace Chill\PersonBundle\Controller;

use Chill\PersonBundle\Config\ConfigPersonAltNamesHelper;
use Chill\PersonBundle\Entity\Person;
use Chill\PersonBundle\Form\CreationPersonType;
use Chill\PersonBundle\Form\PersonType;
use Chill\PersonBundle\Privacy\PrivacyEvent;
use Chill\PersonBundle\Repository\PersonRepository;
use Chill\PersonBundle\Search\SimilarPersonMatcher;
use DateTime;
use Psr\Log\LoggerInterface;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Translation\TranslatorInterface;
use Symfony\Component\Validator\Validator\ValidatorInterface;

use function count;

class PersonController extends AbstractController
{
    /**
     * @var ConfigPersonAltNamesHelper
     */
    protected $configPersonAltNameHelper;

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

    /**
     * @var PersonRepository;
     */
    protected $personRepository;

    /**
     * @var SimilarPersonMatcher
     */
    protected $similarPersonMatcher;

    /**
     * @var TranslatorInterface
     */
    protected $translator;

    /**
     * @var \Psr\Log\LoggerInterface
     */
    private $logger;

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

    public function __construct(
        SimilarPersonMatcher $similarPersonMatcher,
        TranslatorInterface $translator,
        EventDispatcherInterface $eventDispatcher,
        PersonRepository $personRepository,
        ConfigPersonAltNamesHelper $configPersonAltNameHelper,
        LoggerInterface $logger,
        ValidatorInterface $validator
    ) {
        $this->similarPersonMatcher = $similarPersonMatcher;
        $this->translator = $translator;
        $this->eventDispatcher = $eventDispatcher;
        $this->configPersonAltNameHelper = $configPersonAltNameHelper;
        $this->personRepository = $personRepository;
        $this->logger = $logger;
        $this->validator = $validator;
    }

    public function createAction(Request $request)
    {
        if ($request->getMethod() !== 'POST') {
            $r = new Response('You must send something to create a person !');
            $r->setStatusCode(400);

            return $r;
        }

        $form = $this->createForm(CreationPersonType::class, null, [
            'form_status' => CreationPersonType::FORM_REVIEWED,
        ]);

        $form->handleRequest($request);

        $person = $this->_bindCreationForm($form);

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

        $this->denyAccessUnlessGranted(
            'CHILL_PERSON_CREATE',
            $person,
            'You are not allowed to create this person'
        );

        if ($errors->count() === 0) {
            $em = $this->getDoctrine()->getManager();

            $em->persist($person);

            $em->flush();

            return $this->redirect($this->generateUrl(
                'chill_person_general_edit',
                ['person_id' => $person->getId()]
            ));
        }
        $text = "this should not happen if you reviewed your submission\n";

        foreach ($errors as $error) {
            $text .= $error->getMessage() . "\n";
        }
        $r = new Response($text);
        $r->setStatusCode(400);

        return $r;
    }

    public function editAction($person_id)
    {
        $person = $this->_getPerson($person_id);

        if (null === $person) {
            return $this->createNotFoundException();
        }

        $this->denyAccessUnlessGranted(
            'CHILL_PERSON_UPDATE',
            $person,
            'You are not allowed to edit this person'
        );

        $form = $this->createForm(
            PersonType::class,
            $person,
            [
                'action' => $this->generateUrl(
                    'chill_person_general_update',
                    ['person_id' => $person_id]
                ),
                'cFGroup' => $this->getCFGroup(),
            ]
        );

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

    public function getCFGroup()
    {
        $cFGroup = null;

        $em = $this->getDoctrine()->getManager();
        $cFDefaultGroup = $em->getRepository('ChillCustomFieldsBundle:CustomFieldsDefaultGroup')
            ->findOneByEntity('Chill\\PersonBundle\\Entity\\Person');

        if ($cFDefaultGroup) {
            $cFGroup = $cFDefaultGroup->getCustomFieldsGroup();
        }

        return $cFGroup;
    }

    public function newAction()
    {
        // this is a dummy default center.
        $defaultCenter = $this->get('security.token_storage')
            ->getToken()
            ->getUser()
            ->getGroupCenters()[0]
            ->getCenter();

        $person = (new Person(new DateTime('now')))
            ->setCenter($defaultCenter);

        $form = $this->createForm(
            CreationPersonType::class,
            $person,
            [
                'action' => $this->generateUrl('chill_person_review'),
                'form_status' => CreationPersonType::FORM_NOT_REVIEWED,
            ]
        );

        return $this->_renderNewForm($form);
    }

    public function reviewAction(Request $request)
    {
        if ($request->getMethod() !== 'POST') {
            $r = new Response('You must send something to review the creation of a new Person');
            $r->setStatusCode(400);

            return $r;
        }

        $form = $this->createForm(
                //CreationPersonType::NAME,
            CreationPersonType::class,
            new Person(),
            [
                'action' => $this->generateUrl('chill_person_create'),
                'form_status' => CreationPersonType::FORM_BEING_REVIEWED,
            ]
        );

        $form->handleRequest($request);

        $person = $this->_bindCreationForm($form);

        $errors = $this->_validatePersonAndAccompanyingPeriod($person);
        $this->logger->info(sprintf('Person created with %d errors ', count($errors)));

        if ($errors->count() > 0) {
            $this->logger->info('The created person has errors');
            $flashBag = $this->get('session')->getFlashBag();
            $translator = $this->get('translator');

            $flashBag->add('error', $translator->trans('The person data are not valid'));

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

            $form = $this->createForm(
                CreationPersonType::NAME,
                $person,
                [
                    'action' => $this->generateUrl('chill_person_review'),
                    'form_status' => CreationPersonType::FORM_NOT_REVIEWED,
                ]
            );

            $form->handleRequest($request);

            return $this->_renderNewForm($form);
        }
        $this->logger->info('Person created without errors');

        $alternatePersons = $this->similarPersonMatcher
            ->matchPerson($person);

        if (count($alternatePersons) === 0) {
            return $this->forward('ChillPersonBundle:Person:create');
        }

        $this->get('session')->getFlashBag()->add(
            'info',
            $this->get('translator')->trans(
                '%nb% person with similar name. Please verify that this is a new person',
                ['%nb%' => count($alternatePersons)]
            )
        );

        return $this->render(
            'ChillPersonBundle:Person:create_review.html.twig',
            [
                'person' => $person,
                'alternatePersons' => $alternatePersons,
                'firstName' => $form['firstName']->getData(),
                'lastName' => $form['lastName']->getData(),
                'birthdate' => $form['birthdate']->getData(),
                'gender' => $form['gender']->getData(),
                'creation_date' => $form['creation_date']->getData(),
                'form' => $form->createView(), ]
        );
    }

    public function updateAction($person_id, Request $request)
    {
        $person = $this->_getPerson($person_id);

        if (null === $person) {
            return $this->createNotFoundException();
        }

        $this->denyAccessUnlessGranted(
            'CHILL_PERSON_UPDATE',
            $person,
            'You are not allowed to edit this person'
        );

        $form = $this->createForm(
            PersonType::class,
            $person,
            ['cFGroup' => $this->getCFGroup()]
        );

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

            if (!$form->isValid()) {
                $this->get('session')
                    ->getFlashBag()->add('error', $this->translator
                    ->trans('This form contains errors'));

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

            $this->get('session')->getFlashBag()
                ->add(
                    'success',
                    $this->get('translator')
                        ->trans('The person data has been updated')
                );

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

            $url = $this->generateUrl('chill_person_view', [
                'person_id' => $person->getId(),
            ]);

            return $this->redirect($url);
        }
    }

    public function viewAction($person_id)
    {
        $person = $this->_getPerson($person_id);

        if (null === $person) {
            throw $this->createNotFoundException("Person with id {$person_id} not"
                    . ' found on this server');
        }

        $this->denyAccessUnlessGranted(
            'CHILL_PERSON_SEE',
            $person,
            'You are not allowed to see this person.'
        );

        $event = new PrivacyEvent($person);
        $this->eventDispatcher->dispatch(PrivacyEvent::PERSON_PRIVACY_EVENT, $event);

        return $this->render(
            'ChillPersonBundle:Person:view.html.twig',
            [
                'person' => $person,
                'cFGroup' => $this->getCFGroup(),
                'alt_names' => $this->configPersonAltNameHelper->getChoices(),
            ]
        );
    }

    /**
     * @param type $form
     *
     * @return \Chill\PersonBundle\Entity\Person
     */
    private function _bindCreationForm($form)
    {
        /**
         * @var Person
         */
        $person = $form->getData();

        $periods = $person->getAccompanyingPeriodsOrdered();
        $period = $periods[0];
        $period->setOpeningDate($form['creation_date']->getData());
//        $person = new Person($form['creation_date']->getData());
//
//        $person->setFirstName($form['firstName']->getData())
//                ->setLastName($form['lastName']->getData())
//                ->setGender($form['gender']->getData())
//                ->setBirthdate($form['birthdate']->getData())
//                ->setCenter($form['center']->getData())
//                ;

        return $person;
    }

    /**
     * easy getting a person by his id.
     *
     * @param mixed $id
     *
     * @return \Chill\PersonBundle\Entity\Person
     */
    private function _getPerson($id)
    {
        return $this->personRepository->find($id);
    }

    private function _renderNewForm($form)
    {
        return $this->render(
            'ChillPersonBundle:Person:create.html.twig',
            [
                'form' => $form->createView(),
            ]
        );
    }

    /**
     * @return \Symfony\Component\Validator\ConstraintViolationListInterface
     */
    private function _validatePersonAndAccompanyingPeriod(Person $person)
    {
        $errors = $this->validator
            ->validate($person, null, ['creation']);

        //validate accompanying periods
        $periods = $person->getAccompanyingPeriods();

        foreach ($periods as $period) {
            $period_errors = $this->validator
                ->validate($period);

            //group errors :
            foreach ($period_errors as $error) {
                $errors->add($error);
            }
        }

        return $errors;
    }
}