<?php

namespace App\Form;

use App\Entity\Arrondissement;
use App\Entity\Department;
use App\Entity\Commune;
use Symfony\Bridge\Doctrine\Form\Type\EntityType;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormEvents;
use Symfony\Component\Form\FormEvent;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\Form\FormInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
use Doctrine\ORM\EntityManagerInterface;

class ArrondissementSelType extends AbstractType
{
    private $entityManager;

    public function __construct(EntityManagerInterface $entityManager)
    {
        $this->entityManager = $entityManager;
    }
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('department', EntityType::class, [
                'label' => 'basics.department',
                'class' => Department::class,
                'attr' => [
                    'onchange' => 'this.form.submit()'
                ],
                'placeholder' => 'basics.department.placeholder',
                'mapped' => false,
                'required' => false,
            ])

            ->add('commune', EntityType::class, [
                'label' => 'basics.commune',
                'class' => Commune::class,
                'placeholder' => 'Sélectionnez d\'abord un département',
                'attr' => [
                    'onchange' => 'this.form.submit()'
                ],
                'mapped' => false,
                'required' => false,
                'choices' => []
            ])

            ->add('arrondissement', EntityType::class, [
                'label' => 'basics.arrondissement',
                'class' => Arrondissement::class,
                'placeholder' => 'Sélectionnez d\'abord une commune',
                'attr' => [
                    'onchange' => 'this.form.submit()'
                ],
                'mapped' => false,
                'required' => false,
                'choices' => []
            ]);
    
            $builder->get('department')->addEventListener(FormEvents::POST_SUBMIT, function (FormEvent $event) {
                $form = $event->getForm()->getParent();
                $department = $event->getForm()->getData();
                $this->addCommuneField($form, $department);
            });
        
    }

    private function addCommuneField(FormInterface $form, ?Department $department)
    {
        if($department){
            $builder = $form->getConfig()->getFormFactory()->createNamedBuilder(
                'commune',
                EntityType::class,
                null,
                [
                    'label' => 'basics.commune',
                    'class' => Commune::class,
                    'choice_label' => 'name',
                    'placeholder' => 'basics.commune.placeholder',
                    'attr' => [
                        'onchange' => 'this.form.submit()'
                    ],
                    'mapped' => false,
                    'required' => false,
                    'auto_initialize' => false,
                    'choices' => $department ? $department->getCommunes() : []
                ]
            );

            $builder->addEventListener(
                FormEvents::POST_SUBMIT,
                function (FormEvent $event)  {
                    $form = $event->getForm();
                    $this->addArrondissementField($form->getParent(), $form->getData());
                }
            );

        }else{
            $builder = $form->getConfig()->getFormFactory()->createNamedBuilder(
                'commune',
                EntityType::class,
                null,
                [
                    'label' => 'basics.commune',
                    'class' => Commune::class,
                    'choice_label' => 'name',
                    'placeholder' => 'Sélectionnez d\'abord un département',
                    'mapped' => false,
                    'required' => false,
                    'auto_initialize' => false,
                    'choices' =>[]
                ]
            );

        }

        $form->add($builder->getForm());
        
    }

    private function addArrondissementField(FormInterface $form, ?Commune $commune)
    {
        if($commune){
            $form->add('arrondissement', EntityType::class, [
                'label' => 'basics.arrondissement',
                'class' => Arrondissement::class,
                'placeholder' => 'basics.arrondissement.placeholder',
                'attr' => [
                    'onchange' => 'this.form.submit()'
                ],
                'mapped' => false,
                'required' => false,
                'choices' => $commune ? $commune->getArrondissements() : []
            ]);
        }else{
            $form->add('arrondissement', EntityType::class, [
                'label' => 'basics.arrondissement',
                'class' => Arrondissement::class,
                'placeholder' => 'Sélectionnez d\'abord une commune',
                'attr' => [
                    'onchange' => 'this.form.submit()'
                ],
                'mapped' => false,
                'required' => false,
                'choices' => []
            ]);
        }
        
    }

    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(array(
        ));
    }
}