<?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\PersonBundle\Controller;

use Chill\PersonBundle\Privacy\PrivacyEvent;
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;

/**
 * Class AccompanyingPeriodController
 *
 * @package Chill\PersonBundle\Controller
 */
class AccompanyingPeriodController extends AbstractController
{
    /**
     * @var EventDispatcherInterface
     */
    protected $eventDispatcher;
    
    /**
     * ReportController constructor.
     *
     * @param EventDispatcherInterface $eventDispatcher
     */
    public function __construct(EventDispatcherInterface $eventDispatcher)
    {
        $this->eventDispatcher = $eventDispatcher;
    }
    
    /**
     * @param $person_id
     * @return Response
     */
    public function listAction($person_id){

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

        return $this->render('ChillPersonBundle:AccompanyingPeriod:list.html.twig',
                array('accompanying_periods' => $person->getAccompanyingPeriodsOrdered(),
                    'person' => $person));
    }
    
    /**
     * @param $person_id
     * @param Request $request
     * @return \Symfony\Component\HttpFoundation\RedirectResponse|Response
     */
    public function createAction($person_id, Request $request)
    {
        
        $person = $this->_getPerson($person_id);

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

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

        $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 ($form->isValid(array('Default', 'closed'))
                && count($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',
                        array('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',
                array(
                   'form' => $form->createView(),
                   'person' => $person,
                   'accompanying_period' => $accompanyingPeriod
                   )
              );
    }
    
    /**
     * @param $person_id
     * @param $period_id
     * @param Request $request
     * @return \Symfony\Component\HttpFoundation\RedirectResponse|Response|\Symfony\Component\HttpKernel\Exception\NotFoundHttpException
     */
    public function updateAction($person_id, $period_id, Request $request){
        $em = $this->getDoctrine()->getManager();

        $accompanyingPeriod = $em->getRepository('ChillPersonBundle:AccompanyingPeriod')
                ->find($period_id);

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

        $person = $accompanyingPeriod->getPerson();

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

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

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

            if ($form->isValid(array('Default', 'closed'))
                    && count($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',
                        array('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',
                array(
                   'form' => $form->createView(),
                   'person' => $person,
                   'accompanying_period' => $accompanyingPeriod
              ) );
    }
    
    /**
     * @param $person_id
     * @param Request $request
     * @return \Symfony\Component\HttpFoundation\RedirectResponse|Response
     * @throws \Exception
     */
    public function closeAction($person_id, Request $request)
    {
        
        $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',
                        array('%name%' => $person->__toString())));

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

        $current = $person->getCurrentAccompanyingPeriod();
        
        $form = $this->createForm(AccompanyingPeriodType::class, $current, array(
            '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.',
                                array('%name%' => $person->__toString())));

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

                    return $this->redirect(
                            $this->generateUrl('chill_person_accompanying_period_list', array(
                                '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',
                array(
                    'form' => $form->createView(),
                    'person' => $person,
                    'accompanying_period' => $current
                ));
    }
    
    /**
     * @param Person $person
     * @return \Symfony\Component\Validator\ConstraintViolationListInterface
     */
    private function _validatePerson(Person $person) {
        $errors = $this->get('validator')->validate($person, null,
            array('Default'));
        $errors_accompanying_period = $this->get('validator')->validate($person, null,
            array('accompanying_period_consistent'));

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

        return $errors;
    }
    
    /**
     * @param $person_id
     * @param Request $request
     * @return \Symfony\Component\HttpFoundation\RedirectResponse|Response
     */
    public function openAction($person_id, Request $request) {
        $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',
                        array('%name%' => $person->__toString())));

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

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

        $form = $this->createForm(AccompanyingPeriodType::class,
            $accompanyingPeriod, array('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.',
                                            array('%name%' => $person->__toString())));

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

                    return $this->redirect(
                        $this->generateUrl('chill_person_accompanying_period_list', array(
                            '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',
            array('form' => $form->createView(),
                'person' => $person,
                'accompanying_period' => $accompanyingPeriod));
    }
    
    /**
     * @param $person_id
     * @param $period_id
     * @param Request $request
     * @return object|\Symfony\Component\HttpFoundation\RedirectResponse|Response
     */
    public function reOpenAction($person_id, $period_id, Request $request)
    {
        $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()) {
            $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',
                    array('person_id' => $person->getId()));
        } elseif ($confirm === false && $period->canBeReOpened()) {
            return $this->render('ChillPersonBundle:AccompanyingPeriod:re_open.html.twig', array(
                'period' => $period,
                'person' => $person
            ));
        } else {
            return (new Response())
                ->setStatusCode(Response::HTTP_BAD_REQUEST)
                ->setContent("You cannot re-open this period");
        }
    }

    /**
     *
     * @param int $id
     * @return Person
     * @throws \Symfony\Component\HttpKernel\Exception\NotFoundHttpException if the person is not found
     */
    private function _getPerson($id) {
        $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;
    }
}