<?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\CalendarBundle\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\CalendarBundle\Entity\Calendar;
use Chill\CalendarBundle\Form\CalendarType;
use Chill\MainBundle\Entity\User;
use Symfony\Component\Serializer\SerializerInterface;
use Symfony\Component\Routing\Annotation\Route;

/**
 * Class CalendarController
 *
 * @package Chill\CalendarBundle\Controller
 */
class CalendarController 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 Calendar entities.
     * @Route("/{_locale}/calendar/", name="chill_calendar_calendar")
     */
    public function listAction(Request $request): Response
    {
        $em = $this->getDoctrine()->getManager();
        $view = null;

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

        if ($user instanceof User) {

            // $calendar = $em->getRepository(Calendar::class)
            //     ->findByUser($user)
            //     ;

            // $view = 'ChillCalendarBundle:Calendar:listByUser.html.twig';
        } elseif ($accompanyingPeriod instanceof AccompanyingPeriod) {
            $calendarItems = $em->getRepository(Calendar::class)->findBy(
                ['accompanyingPeriod' => $accompanyingPeriod]
            );

            $view = 'ChillCalendarBundle:Calendar:listByAccompanyingCourse.html.twig';
        }

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

    /**
     * Create a new calendar item
     * @Route("/{_locale}/calendar/new", name="chill_calendar_calendar_new")
     */
    public function newAction(Request $request): Response
    {
        $em = $this->getDoctrine()->getManager();

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

        if ($accompanyingPeriod instanceof AccompanyingPeriod) {
            $view = 'ChillCalendarBundle:Calendar:newAccompanyingCourse.html.twig';
        } 
        // elseif ($user instanceof User) {
        //     $view = 'ChillCalendarBundle:Calendar:newUser.html.twig';
        // }

        $entity = new Calendar();
        $entity->setUser($this->getUser());
        $entity->setStatus($entity::STATUS_VALID);

        // if ($user instanceof User) {
        //     $entity->setPerson($user);
        // }

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

        $form = $this->createForm(CalendarType::class, $entity, [
            'accompanyingPeriod' => $accompanyingPeriod,
        ])->handleRequest($request);

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

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

            $params = $this->buildParamsToUrl($user, $accompanyingPeriod); //TODO useful?
            $params['id'] = $entity->getId();

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

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

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

    /**
     * Show a calendar item
     * @Route("/{_locale}/calendar/{id}/show", name="chill_calendar_calendar_show")
     */
    public function showAction(Request $request, $id): Response
    {
        $em = $this->getDoctrine()->getManager();

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

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

        $entity = $em->getRepository('ChillCalendarBundle:Calendar')->find($id);

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

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

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

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


     /**
     * Edit a calendar item
     * @Route("/{_locale}/calendar/{id}/edit", name="chill_calendar_calendar_edit")
     */
    public function editAction($id, Request $request): Response
    {
        $em = $this->getDoctrine()->getManager();

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

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

        $entity = $em->getRepository('ChillCalendarBundle:Calendar')->find($id);

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

        $form = $this->createForm(CalendarType::class, $entity, [
            'accompanyingPeriod' => $accompanyingPeriod,
        ])->handleRequest($request);

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

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

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

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

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

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

     /**
     * Delete a calendar item
     * @Route("/{_locale}/calendar/{id}/delete", name="chill_calendar_calendar_delete")
     */
    public function deleteAction(Request $request, $id)
    {
        $em = $this->getDoctrine()->getManager();

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

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

        /* @var $entity Calendar */
        $entity = $em->getRepository('ChillCalendarBundle:Calendar')->find($id);

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

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

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

            if ($form->isValid()) {

                $this->logger->notice("A calendar event has been removed", array(
                   'by_user' => $this->getUser()->getUsername(),
                   'calendar_id' => $entity->getId()
                ));

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

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

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

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

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

    /**
     * Creates a form to delete a Calendar 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_calendar_calendar_delete', $params))
            ->setMethod('DELETE')
            ->add('submit', SubmitType::class, array('label' => 'Delete'))
            ->getForm()
        ;
    }

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

        if ($request->query->has('user_id')) {
            $user_id = $request->get('user_id');
            $user = $em->getRepository(User::class)->find($user_id);

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

            $this->denyAccessUnlessGranted('CHILL_PERSON_SEE', $user);
        } elseif ($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 [
            $user, $accompanyingPeriod
        ];
    }

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

        if ($user) {
            $params['user_id'] = $user->getId();
        }

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

        return $params;
    }
}