<?php

namespace Chill\MainBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Form\Extension\Core\Type\SubmitType;
use Chill\MainBundle\Form\UserPasswordType;
use Chill\MainBundle\Entity\User;
use Symfony\Component\Security\Core\Encoder\UserPasswordEncoderInterface;
use Symfony\Component\Translation\TranslatorInterface;
use Psr\Log\LoggerInterface;
use Symfony\Component\Form\Extension\Core\Type\TextType;
use Symfony\Component\Validator\Constraints\Callback;
use Symfony\Component\Validator\Context\ExecutionContextInterface;
use Chill\MainBundle\Security\PasswordRecover\RecoverPasswordHelper;
use Symfony\Component\HttpFoundation\Response;
use Chill\MainBundle\Security\PasswordRecover\TokenManager;

class PasswordController extends Controller
{
    /**
     *
     * @var UserPasswordEncoderInterface
     */
    protected $passwordEncoder;
    
    /**
     *
     * @var TranslatorInterface
     */
    protected $translator;
    
    /**
     *
     * @var LoggerInterface
     */
    protected $chillLogger;
    
    /**
     *
     * @var RecoverPasswordHelper
     */
    protected $recoverPasswordHelper;
    
    /**
     *
     * @var TokenManager
     */
    protected $tokenManager;
    
    public function __construct(
        LoggerInterface $chillLogger,
        UserPasswordEncoderInterface $passwordEncoder,
        RecoverPasswordHelper $recoverPasswordHelper,
        TokenManager $tokenManager,
        TranslatorInterface $translator
    ) {
        $this->chillLogger = $chillLogger;
        $this->passwordEncoder = $passwordEncoder;
        $this->translator = $translator;
        $this->tokenManager = $tokenManager;
        $this->recoverPasswordHelper = $recoverPasswordHelper;
    }
    
    /**
     *
     * @param Request $request
     * @return Response
     */
    public function UserPasswordAction(Request $request)
    {
        // get authentified user
        $user = $this->getUser();

        // create a form for password_encoder
        $form = $this->passwordForm($user);

        // process the form
        $form->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) {
            $password = $form->get('new_password')->getData();

            // logging for prod
            $this
                ->chillLogger
                ->notice(
                    'update password for an user',
                    array(
                        'method' => $request->getMethod(), 
                        'user' => $user->getUsername()
                )
            );

            $user->setPassword($this->passwordEncoder->encodePassword($user, $password));

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

            $this->addFlash('success', $this->translator->trans('Password successfully updated!'));
            
            return $this->redirectToRoute('change_my_password');

        }

        // render into a template
        return $this->render('ChillMainBundle:Password:password.html.twig', array(
            'form' => $form->createView()
        ));

    }

    /**
     *
     *
     * @param User $user
     * @return \Symfony\Component\Form\Form
     */
    private function passwordForm(User $user)
    {
        return $this
            ->createForm(
                UserPasswordType::class,
                [],
                [ 'user' => $user ]
            )
            ->add('submit', SubmitType::class, array('label' => 'Change password'))
                ;
    }


    public function recoverAction(Request $request)
    {
        $query = $request->query;
        $username = $query->get(TokenManager::USERNAME_CANONICAL);
        $hash = $query->getAlnum(TokenManager::HASH);
        $token = $query->getAlnum(TokenManager::TOKEN);
        $timestamp = $query->getInt(TokenManager::TIMESTAMP);
        $user = $this->getDoctrine()->getRepository(User::class)
            ->findOneByUsernameCanonical($username);
        
        if (NULL === $user) {
            throw $this->createNotFoundException(sprintf('User %s not found', $username));
        }
        
        if (TRUE !== $this->tokenManager->verify($hash, $token, $user, $timestamp)) {
            return new Response("Invalid token", Response::HTTP_FORBIDDEN);
        }
        
        $form = $this->passwordForm($user);
        $form->remove('actual_password');
        
        $form->handleRequest($request);
        
        if ($form->isSubmitted() && $form->isValid()) {
            $password = $form->get('new_password')->getData();
            $user->setPassword($this->passwordEncoder->encodePassword($user, $password));
            // logging for prod
            $this
                ->chillLogger
                ->notice(
                    'setting new password for user',
                    array(
                        'user' => $user->getUsername()
                    )
                );
            
            $this->getDoctrine()->getManager()->flush();
            
            return $this->redirectToRoute('password_request_recover_changed');
        }
        
        return $this->render('@ChillMain/Password/recover_password_form.html.twig', [
            'form' => $form->createView()
        ]);
        
    }
    
    public function changeConfirmedAction()
    {
        return $this->render('@ChillMain/Password/recover_password_changed.html.twig');
    }
    
    public function requestRecoverAction(Request $request)
    {
        $form = $this->requestRecoverForm();
        
        $form->handleRequest($request);
        
        if ($form->isSubmitted() && $form->isValid()) {
            /* @var $qb \Doctrine\ORM\QueryBuilder */
            $qb = $this->getDoctrine()->getManager()
                ->createQueryBuilder();
            $qb->select('u')
                ->from(User::class, 'u')
                ->where($qb->expr()->eq('u.usernameCanonical', 'UNACCENT(LOWER(:pattern))'))
                ->orWhere($qb->expr()->eq('u.emailCanonical', 'UNACCENT(LOWER(:pattern))' ))
                ->setParameter('pattern', $form->get('username_or_email')->getData())
                ;
            
            $user = $qb->getQuery()->getSingleResult();
            
            if (empty($user->getEmail())) {
                $this->addFlash('error', $this->translator->trans('This account does not have an email address. '
                    . 'Please ask your administrator to renew your password.'));
            } else {
                $this->recoverPasswordHelper->sendRecoverEmail($user, 
                    (new \DateTimeImmutable('now'))->add(new \DateInterval('PT30M')));
                
                // logging for prod
                $this
                    ->chillLogger
                    ->notice(
                        'Sending an email for password recovering',
                        array(
                            'user' => $user->getUsername()
                    )
                );
                
                return $this->redirectToRoute('password_request_recover_confirm');
            }
        }
        
        return $this->render('@ChillMain/Password/request_recover_password.html.twig', [
            'form' => $form->createView()
        ]);
    }
    
    public function requestRecoverConfirmAction()
    {
        return $this->render('@ChillMain/Password/request_recover_password_confirm.html.twig');
    }
    
    protected function requestRecoverForm()
    {
        $builder = $this->createFormBuilder();
        $builder
            ->add('username_or_email', TextType::class, [
                'label' => 'Username or email',
                'constraints' => [
                    new Callback([
                        'callback' => function($pattern, ExecutionContextInterface $context, $payload) {
                            $qb = $this->getDoctrine()->getManager()
                            ->createQueryBuilder();
                            $qb->select('COUNT(u)')
                                ->from(User::class, 'u')
                                ->where($qb->expr()->eq('u.usernameCanonical', 'UNACCENT(LOWER(:pattern))'))
                                ->orWhere($qb->expr()->eq('u.emailCanonical', 'UNACCENT(LOWER(:pattern))' ))
                                ->setParameter('pattern', $pattern)
                            ;

                            if ((int) $qb->getQuery()->getSingleScalarResult() !== 1) {
                                $context->addViolation('This username or email does not exists');
                            }
                        }
                    ])
                ]
            ])
            ->add('submit', SubmitType::class, [
                'label' => 'Request recover'
            ]);
        
        return $builder->getForm();
    }
}