<?php

declare(strict_types=1);

namespace Chill\PersonBundle\Serializer\Normalizer;

use Chill\PersonBundle\Entity\Household\Position;
use Chill\PersonBundle\Entity\Household\Household;
use Chill\PersonBundle\Entity\Person;
use Symfony\Component\Serializer\Normalizer\DenormalizerAwareInterface;
use Symfony\Component\Serializer\Normalizer\DenormalizerAwareTrait;
use Symfony\Component\Serializer\Normalizer\DenormalizerInterface;
use Symfony\Component\Serializer\Exception;
use Chill\PersonBundle\Household\MembersEditorFactory;
use Chill\PersonBundle\Household\MembersEditor;

class MembersEditorNormalizer implements DenormalizerInterface, DenormalizerAwareInterface
{
    private MembersEditorFactory $factory;

    use DenormalizerAwareTrait;

    public function __construct(MembersEditorFactory $factory)
    {
        $this->factory = $factory;
    }

    public function denormalize($data, string $type, string $format = null, array $context = [])
    {
        // some test about schema first...
        $this->performChecks($data);

        // route to "leave movement" (all concerned leave household)
        // or "move to another household" (all concerned go to another
        // household)
        if (NULL === $data['destination']) {
            return $this->denormalizeLeave($data, $type, $format, $context);
        }

        return $this->denormalizeMove($data, $type, $format, $context);
    }

    private  function performChecks($data): void
    {
        if (NULL == $data['concerned'] ?? NULL
            && FALSE === ·\is_array('concerned')) {
            throw new Exception\UnexpectedValueException("The schema does not have any key 'concerned'");
        }

        if (FALSE === \array_key_exists('destination', $data)) {
            throw new Exception\UnexpectedValueException("The schema does not have any key 'destination'");
        }
    }

    protected function denormalizeLeave($data, string $type, string $format, array $context = [])
    {
        $editor = $this->factory->createEditor(null);

        foreach ($data['concerned'] as $key => $concerned) {
            $person = $this->denormalizer->denormalize($concerned['person'] ?? null, Person::class,
                $format, $context);
            $startDate = $this->denormalizer->denormalize($concerned['start_date'] ?? null, \DateTimeImmutable::class,
                $format, $context);

            if (
                NULL === $person
                && NULL === $startDate
            ) {
                throw new Exception\InvalidArgumentException("position with ".
                    "key $key could not be denormalized: missing ".
                    "person or start_date.");
            }

            $editor->leaveMovement($startDate, $person);
        }

        return $editor;
    }

    protected function denormalizeMove($data, string $type, string $format, array $context = [])
    {
        $householdContext = $context;
        $householdContext['groups'][] = 'create';

        $household = $this->denormalizer->denormalize($data['destination'], Household::class,
            $format, $householdContext);

        if (NULL === $household) {
           throw new Exception\InvalidArgumentException("household could not be denormalized. Impossible to process");
        }

        $editor = $this->factory->createEditor($household);

        foreach ($data['concerned'] as $key => $concerned) {
            $person = $this->denormalizer->denormalize($concerned['person'] ?? null, Person::class,
                $format, $context);
            $position = $this->denormalizer->denormalize($concerned['position'] ?? null, Position::class,
                $format, $context);
            $startDate = $this->denormalizer->denormalize($concerned['start_date'] ?? null, \DateTimeImmutable::class,
                $format, $context);

            $holder = (bool) $concerned['holder'] ?? false;
            $comment = (string) $concerned['comment'] ?? false;

            if (
                NULL === $person
                && NULL === $position
                && NULL === $startDate
            ) {
                throw new Exception\InvalidArgumentException("position with ".
                    "key $key could not be denormalized: missing ".
                    "person, position or start_date.");
            }

            $editor->addMovement($startDate, $person, $position, $holder,
                $comment);
        }

        return $editor;
    }

    public function supportsDenormalization($data, string $type, string $format = null)
    {
        return $type === MembersEditor::class;
    }

}