<?php

/*
 * Chill is a software for social workers
 *
 * Copyright (C) 2014-2021, 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\PersonBundle\Controller;

use Chill\PersonBundle\Privacy\PrivacyEvent;
use Doctrine\DBAL\Exception;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Chill\PersonBundle\Entity\Person;
use Chill\PersonBundle\Form\AccompanyingPeriodType;
use Chill\PersonBundle\Entity\AccompanyingPeriod;
use Doctrine\Common\Collections\Criteria;
use Chill\PersonBundle\Security\Authorization\PersonVoter;
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;

/**
 * Class AccompanyingPeriodController
 *
 * @package Chill\PersonBundle\Controller
 */
class AccompanyingPeriodController extends AbstractController
{
    /**
     * @var EventDispatcherInterface
     */
    protected $eventDispatcher;
    
    /**
     * @var ValidatorInterface
     */
    protected $validator;
    
    /**
     * AccompanyingPeriodController constructor.
     *
     * @param EventDispatcherInterface $eventDispatcher
     * @param ValidatorInterface $validator
     */
    public function __construct(EventDispatcherInterface $eventDispatcher, ValidatorInterface $validator)
    {
        $this->eventDispatcher = $eventDispatcher;
        $this->validator = $validator;
    }
    
    public function listAction(int $person_id): Response
    {
        $person = $this->_getPerson($person_id);
    
        $event = new PrivacyEvent($person, [
            'element_class' => AccompanyingPeriod::class,
            'action' => 'list'
        ]);
        $this->eventDispatcher->dispatch(PrivacyEvent::PERSON_PRIVACY_EVENT, $event);

        return $this->render('ChillPersonBundle:AccompanyingPeriod:list.html.twig', [
            'accompanying_periods' => $person->getAccompanyingPeriodsOrdered(),
            'person' => $person
        ]);
    }
    
    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()
                    ]));
                
            } else {
                $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
        ]);
    }
    
    /**
     * @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 ($accompanyingPeriod === null) {
            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()
                ]));
                
            } else {
                
                $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 \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()
                        ])
                    );
                    
                } else {
                    $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
        ]);
    }
    
    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;
    }
    
    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()
                        ]));

                } else {
                    $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);

        $criteria = Criteria::create();
        $criteria->where($criteria->expr()->eq('id', $period_id));

        /* @var $period AccompanyingPeriod */
        $period = $person->getAccompanyingPeriods()
                ->matching($criteria)
                ->first();

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

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

        if ($confirm === true && $period->canBeReOpened($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()
            ]);
            
        } elseif ($confirm === false && $period->canBeReOpened($person)) {
            return $this->render('ChillPersonBundle:AccompanyingPeriod:re_open.html.twig', [
                'period' => $period,
                'person' => $person
            ]);
            
        } else {
            return (new Response())
                ->setStatusCode(Response::HTTP_BAD_REQUEST)
                ->setContent("You cannot re-open this period");
        }
    }

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

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

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

        return $person;
    }
}