<?php

namespace KupShop\FeedGeneratorBundle\Configuration;

use Symfony\Component\Serializer\Exception\BadMethodCallException;
use Symfony\Component\Serializer\Exception\InvalidArgumentException;
use Symfony\Component\Serializer\Exception\NotNormalizableValueException;
use Symfony\Component\Serializer\Normalizer\DenormalizerInterface;
use Symfony\Component\Serializer\SerializerAwareInterface;
use Symfony\Component\Serializer\SerializerInterface;

/**
 * This is just slightly modified Symfony\Component\Serializer\Normalizer\ArrayDenormalizer.
 */
class NodesDenormalizer implements DenormalizerInterface, SerializerAwareInterface
{
    /**
     * @var SerializerInterface|DenormalizerInterface
     */
    private $serializer;

    /**
     * @throws NotNormalizableValueException
     */
    public function denormalize($data, $class, $format = null, array $context = [])
    {
        if (null === $this->serializer) {
            throw new BadMethodCallException('Please set a serializer before calling denormalize()!');
        }
        if (!is_array($data)) {
            throw new InvalidArgumentException('Data expected to be an array, '.gettype($data).' given.');
        }
        if ('[]' !== substr($class, -2)) {
            throw new InvalidArgumentException('Unsupported class: '.$class);
        }

        $serializer = $this->serializer;

        $builtinType = isset($context['key_type']) ? $context['key_type']->getBuiltinType() : null;
        foreach ($data as $key => $value) {
            if (null !== $builtinType && !call_user_func('is_'.$builtinType, $key)) {
                throw new NotNormalizableValueException(sprintf('The type of the key "%s" must be "%s" ("%s" given).', $key, $builtinType, gettype($key)));
            }

            // setup $class according to property "type"
            $class = '\\'.__NAMESPACE__.'\\Nodes\\'.ucfirst($value['type']).'Node';

            $data[$key] = $serializer->denormalize($value, $class, $format, $context);
        }

        return $data;
    }

    public function supportsDenormalization($data, $type, $format = null/* , array $context = array() */)
    {
        // when $type ends with INode[] its our case, so return true
        return 'INode[]' === substr($type, -7);
    }

    public function setSerializer(SerializerInterface $serializer)
    {
        if (!$serializer instanceof DenormalizerInterface) {
            throw new InvalidArgumentException('Expected a serializer that also implements DenormalizerInterface.');
        }

        $this->serializer = $serializer;
    }
}