<?php

/*
 * Chill is a software for social workers
 *
 * Copyright (C) 2014-2015, Champs Libres Cooperative SCRLFS,
 * <http://www.champs-libres.coop>, <info@champs-libres.coop>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

namespace Chill\ActivityBundle\Controller;

use Chill\MainBundle\Security\Authorization\AuthorizationHelper;
use Chill\PersonBundle\Entity\AccompanyingPeriod;
use Chill\PersonBundle\Entity\Person;
use Chill\PersonBundle\Privacy\PrivacyEvent;
use Psr\Log\LoggerInterface;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
use Symfony\Component\Form\Form;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\Form\Extension\Core\Type\SubmitType;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Security\Core\Role\Role;
use Chill\ActivityBundle\Entity\Activity;
use Chill\ActivityBundle\Form\ActivityType;
use Symfony\Component\Serializer\SerializerInterface;

/**
 * Class ActivityController
 *
 * @package Chill\ActivityBundle\Controller
 */
class ActivityController extends AbstractController
{
    protected EventDispatcherInterface $eventDispatcher;

    protected AuthorizationHelper $authorizationHelper;

    protected LoggerInterface $logger;
    
    protected SerializerInterface $serializer;

    public function __construct(
        EventDispatcherInterface $eventDispatcher,
        AuthorizationHelper $authorizationHelper,
        LoggerInterface $logger,
        SerializerInterface $serializer
    ) {
        $this->eventDispatcher = $eventDispatcher;
        $this->authorizationHelper = $authorizationHelper;
        $this->logger = $logger;
        $this->serializer = $serializer;
    }

    /**
     * Lists all Activity entities.
     */
    public function listAction(Request $request): Response
    {
        $em = $this->getDoctrine()->getManager();
        $view = null;

        [$person, $accompanyingPeriod] = $this->getEntity($request);

        if ($person instanceof Person) {
            $reachableScopes = $this->authorizationHelper
                ->getReachableCircles($this->getUser(), new Role('CHILL_ACTIVITY_SEE'),
                    $person->getCenter());

            $activities = $em->getRepository('ChillActivityBundle:Activity')->findBy(
                ['person' => $person, 'scope' => $reachableScopes],
                ['date' => 'DESC'],
            );

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

            $view = 'ChillActivityBundle:Activity:listPerson.html.twig';
        } elseif ($accompanyingPeriod instanceof AccompanyingPeriod) {
            $activities = $em->getRepository('ChillActivityBundle:Activity')->findBy(
                ['accompanyingPeriod' => $accompanyingPeriod],
                ['date' => 'DESC'],
            );

            $view = 'ChillActivityBundle:Activity:listAccompanyingCourse.html.twig';
        }

        return $this->render($view, array(
            'activities' => $activities,
            'person'   => $person,
            'accompanyingCourse' => $accompanyingPeriod,
        ));
    }

    public function selectTypeAction(Request $request): Response
    {
        $em = $this->getDoctrine()->getManager();
        $view = null;

        [$person, $accompanyingPeriod] = $this->getEntity($request);

        if ($accompanyingPeriod instanceof AccompanyingPeriod) {
            $view = 'ChillActivityBundle:Activity:selectTypeAccompanyingCourse.html.twig';
        } elseif ($person instanceof Person) {
            $view = 'ChillActivityBundle:Activity:selectTypePerson.html.twig';
        }

        $data = [];

        $activityTypeCategories = $em->getRepository(\Chill\ActivityBundle\Entity\ActivityTypeCategory::class)
            ->findBy(['active' => true], ['ordering' => 'ASC']);

        foreach ($activityTypeCategories as $activityTypeCategory) {
            $activityTypes = $em->getRepository(\Chill\ActivityBundle\Entity\ActivityType::class)
                ->findBy(['active' => true, 'category' => $activityTypeCategory], ['ordering' => 'ASC']);

            $data[] = [
                'activityTypeCategory' => $activityTypeCategory,
                'activityTypes' => $activityTypes,
            ];
        }

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

        return $this->render($view, [
            'person' => $person,
            'accompanyingCourse' => $accompanyingPeriod,
            'data' => $data,
        ]);
    }

    public function newAction(Request $request): Response
    {
        $em = $this->getDoctrine()->getManager();

        [$person, $accompanyingPeriod] = $this->getEntity($request);

        if ($accompanyingPeriod instanceof AccompanyingPeriod) {
            $view = 'ChillActivityBundle:Activity:newAccompanyingCourse.html.twig';
        } elseif ($person instanceof Person) {
            $view = 'ChillActivityBundle:Activity:newPerson.html.twig';
        }

        $activityType_id = $request->get('activityType_id', 0);
        $activityType = $em->getRepository(\Chill\ActivityBundle\Entity\ActivityType::class)
            ->find($activityType_id);

        if (!$activityType instanceof \Chill\ActivityBundle\Entity\ActivityType ||
            !$activityType->isActive()) {

            $params = $this->buildParamsToUrl($person, $accompanyingPeriod);
            return $this->redirectToRoute('chill_activity_activity_select_type', $params);
        }

        $entity = new Activity();
        $entity->setUser($this->getUser());

        if ($person instanceof Person) {
            $entity->setPerson($person);
        }

        if ($accompanyingPeriod instanceof AccompanyingPeriod) {
            $entity->setAccompanyingPeriod($accompanyingPeriod);
        }

        $entity->setType($activityType);
        $entity->setDate(new \DateTime('now'));

        // TODO revoir le Voter de Activity pour tenir compte qu'une activité peut appartenir a une période
        // $this->denyAccessUnlessGranted('CHILL_ACTIVITY_CREATE', $entity);

        $form = $this->createForm(ActivityType::class, $entity, [
            'center' => $entity->getCenter(),
            'role'   => new Role('CHILL_ACTIVITY_CREATE'),
            'activityType' => $entity->getType(),
        ])->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) {
            $em->persist($entity);
            $em->flush();

            $this->addFlash('success', $this->get('translator')->trans('Success : activity created!'));

            $params = $this->buildParamsToUrl($person, $accompanyingPeriod);
            $params['id'] = $entity->getId();

            return $this->redirectToRoute('chill_activity_activity_show', $params);
        }

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

        $activity_array = $this->serializer->normalize($entity, 'json', ['groups' => 'read']);
        
        return $this->render($view, [
            'person'   => $person,
            'accompanyingCourse' => $accompanyingPeriod,
            'entity' => $entity,
            'form' => $form->createView(),
            'activity_json' => $activity_array
        ]);
    }

    public function showAction(Request $request, $id): Response
    {
        $em = $this->getDoctrine()->getManager();

        [$person, $accompanyingPeriod] = $this->getEntity($request);

        if ($accompanyingPeriod instanceof AccompanyingPeriod) {
            $view = 'ChillActivityBundle:Activity:showAccompanyingCourse.html.twig';
        } elseif ($person instanceof Person) {
            $view = 'ChillActivityBundle:Activity:showPerson.html.twig';
        }

        $entity = $em->getRepository('ChillActivityBundle:Activity')->find($id);

        if (!$entity) {
            throw $this->createNotFoundException('Unable to find Activity entity.');
        }
        
        if (null !== $accompanyingPeriod) {
           $entity->personsAssociated = $entity->getPersonsAssociated();
           $entity->personsNotAssociated = $entity->getPersonsNotAssociated();
        }

        // TODO revoir le Voter de Activity pour tenir compte qu'une activité peut appartenir a une période
        // $this->denyAccessUnlessGranted('CHILL_ACTIVITY_SEE', $entity);

        $deleteForm = $this->createDeleteForm($id, $person, $accompanyingPeriod);

        // TODO
        /*
        $event = new PrivacyEvent($person, array(
            'element_class' => Activity::class,
            'element_id' => $entity->getId(),
            'action' => 'show'
        ));
        $this->eventDispatcher->dispatch(PrivacyEvent::PERSON_PRIVACY_EVENT, $event);
        */

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

        return $this->render($view, array(
            'person'      => $person,
            'accompanyingCourse' => $accompanyingPeriod,
            'entity'      => $entity,
            'delete_form' => $deleteForm->createView(),
        ));
    }

    /**
     * Displays a form to edit an existing Activity entity.
     *
     */
    public function editAction($id, Request $request): Response
    {
        $em = $this->getDoctrine()->getManager();

        [$person, $accompanyingPeriod] = $this->getEntity($request);

        if ($accompanyingPeriod instanceof AccompanyingPeriod) {
            $view = 'ChillActivityBundle:Activity:editAccompanyingCourse.html.twig';
        } elseif ($person instanceof Person) {
            $view = 'ChillActivityBundle:Activity:editPerson.html.twig';
        }

        $entity = $em->getRepository('ChillActivityBundle:Activity')->find($id);

        if (!$entity) {
            throw $this->createNotFoundException('Unable to find Activity entity.');
        }

        // TODO
        // $this->denyAccessUnlessGranted('CHILL_ACTIVITY_UPDATE', $entity);

        $form = $this->createForm(ActivityType::class, $entity, [
            'center' => $entity->getCenter(),
            'role'   => new Role('CHILL_ACTIVITY_UPDATE'),
            'activityType' => $entity->getType(),
        ])->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) {
            $em->persist($entity);
            $em->flush();

            $this->addFlash('success', $this->get('translator')->trans('Success : activity updated!'));

            $params = $this->buildParamsToUrl($person, $accompanyingPeriod);
            $params['id'] = $id;
            return $this->redirectToRoute('chill_activity_activity_show', $params);
        }

        $deleteForm = $this->createDeleteForm($id, $person, $accompanyingPeriod);

        /*
         * TODO
        $event = new PrivacyEvent($person, array(
            'element_class' => Activity::class,
            'element_id' => $entity->getId(),
            'action' => 'edit'
        ));
        $this->eventDispatcher->dispatch(PrivacyEvent::PERSON_PRIVACY_EVENT, $event);
        */

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

        $activity_array = $this->serializer->normalize($entity, 'json', ['groups' => 'read']);
         
        return $this->render($view, array(
            'entity'      => $entity,
            'edit_form'   => $form->createView(),
            'delete_form' => $deleteForm->createView(),
            'person' => $person,
            'accompanyingCourse' => $accompanyingPeriod,
            'activity_json' => $activity_array
        ));
    }

    /**
     * Deletes a Activity entity.
     *
     */
    public function deleteAction(Request $request, $id)
    {
        $em = $this->getDoctrine()->getManager();

        [$person, $accompanyingPeriod] = $this->getEntity($request);

        if ($accompanyingPeriod instanceof AccompanyingPeriod) {
            $view = 'ChillActivityBundle:Activity:confirm_deleteAccompanyingCourse.html.twig';
        } elseif ($person instanceof Person) {
            $view = 'ChillActivityBundle:Activity:confirm_deletePerson.html.twig';
        }

        /* @var $activity Activity */
        $activity = $em->getRepository('ChillActivityBundle:Activity')->find($id);

        if (!$activity) {
            throw $this->createNotFoundException('Unable to find Activity entity.');
        }

        // TODO
        // $this->denyAccessUnlessGranted('CHILL_ACTIVITY_DELETE', $activity);

        $form = $this->createDeleteForm($id, $person, $accompanyingPeriod);

        if ($request->getMethod() === Request::METHOD_DELETE) {
            $form->handleRequest($request);

            if ($form->isValid()) {

                $this->logger->notice("An activity has been removed", array(
                   'by_user' => $this->getUser()->getUsername(),
                   'activity_id' => $activity->getId(),
                   'person_id' => $activity->getPerson() ? $activity->getPerson()->getId() : null,
                   'comment' => $activity->getComment()->getComment(),
                   'scope_id' => $activity->getScope() ? $activity->getScope()->getId() : null,
                   'reasons_ids' => $activity->getReasons()
                      ->map(function ($ar) { return $ar->getId(); })
                      ->toArray(),
                   'type_id' => $activity->getType()->getId(),
                   'duration' => $activity->getDurationTime() ? $activity->getDurationTime()->format('U') : null,
                   'date' => $activity->getDate()->format('Y-m-d'),
                   'attendee' => $activity->getAttendee()
                ));

                $em->remove($activity);
                $em->flush();

                $this->addFlash('success', $this->get('translator')
                      ->trans("The activity has been successfully removed."));

                $params = $this->buildParamsToUrl($person, $accompanyingPeriod);
                return $this->redirectToRoute('chill_activity_activity_list', $params);
            }
        }

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

        return $this->render($view, array(
           'activity' => $activity,
           'delete_form' => $form->createView(),
           'person' => $person,
           'accompanyingCourse' => $accompanyingPeriod,
        ));
    }

    /**
     * Creates a form to delete a Activity entity by id.
     */
    private function createDeleteForm(int $id, ?Person $person, ?AccompanyingPeriod $accompanyingPeriod): Form
    {
        $params = $this->buildParamsToUrl($person, $accompanyingPeriod);
        $params['id'] = $id;

        return $this->createFormBuilder()
            ->setAction($this->generateUrl('chill_activity_activity_delete', $params))
            ->setMethod('DELETE')
            ->add('submit', SubmitType::class, array('label' => 'Delete'))
            ->getForm()
        ;
    }

    private function getEntity(Request $request): array
    {
        $em = $this->getDoctrine()->getManager();
        $person = $accompanyingPeriod  = null;

        if ($request->query->has('person_id')) {
            $person_id = $request->get('person_id');
            $person = $em->getRepository(Person::class)->find($person_id);

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

            $this->denyAccessUnlessGranted('CHILL_PERSON_SEE', $person);
        } elseif ($request->query->has('accompanying_period_id')) {
            $accompanying_period_id = $request->get('accompanying_period_id');
            $accompanyingPeriod = $em->getRepository(AccompanyingPeriod::class)->find($accompanying_period_id);

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

            // TODO Add permission
            // $this->denyAccessUnlessGranted('CHILL_PERSON_SEE', $person);
        } else {
            throw $this->createNotFoundException("Person or Accompanying Period not found");
        }

        return [
            $person, $accompanyingPeriod
        ];
    }

    private function buildParamsToUrl(
        ?Person $person,
        ?AccompanyingPeriod $accompanyingPeriod
    ): array {
        $params = [];

        if ($person) {
            $params['person_id'] = $person->getId();
        }

        if ($accompanyingPeriod) {
            $params['accompanying_period_id'] = $accompanyingPeriod->getId();
        }

        return $params;
    }
}