<?php

namespace KupShop\FeedGeneratorBundle\Wrapper;

use KupShop\FeedGeneratorBundle\Utils\ExternalFeedCache;
use KupShop\FeedGeneratorBundle\XSD;
use KupShop\FeedsBundle\Wrapper\BaseWrapper;

class ExternalFeedObjectWrapper extends BaseWrapper
{
    private array $feedRow;
    private XSD\Parser $parser;
    private array $serialized = [];

    public function __construct(XSD\Parser $parser)
    {
        $this->parser = $parser;
    }

    /**
     * Override without type check.
     *
     * @return ExternalFeedObjectWrapper
     */
    public function setObject($object)
    {
        $this->object = $object;

        return $this;
    }

    public function setFeedRow(array $feedRow)
    {
        $this->feedRow = $feedRow;
        $this->serialize();
    }

    private function serialize(): void
    {
        $cache = new ExternalFeedCache($this->feedRow);
        $this->parser->loadFile($cache->getDescriptionUrl());
        $this->serialized = $this->prepareForPrint(
            $this->parser->getFeedRootElement()->serialize()
        );
        $this->serialized['__search'] = '';
    }

    private function prepareForPrint(array $array): array
    {
        $flattened = [];
        foreach ($array['children'] ?? [] as $child) {
            if (!empty($child['children'])) {
                $flattened[$child['name']] = $this->prepareForPrint($child);
            } else {
                $flattened[$child['name']] = '';
            }
        }

        return $flattened;
    }

    public function offsetExists($offset): bool
    {
        return isset($this->object[$offset]);
    }

    public function offsetGet($offset): mixed
    {
        return $this->object[$offset] ?? null;
    }

    public function offsetSet($offset, $value): void
    {
        $this->object[$offset] = $value;
    }

    public function offsetUnset($offset): void
    {
        unset($this->object[$offset]);
    }

    /**
     * Loads field names into JS global context.
     */
    public function getFieldsAndMethodsNames(): array
    {
        return array_keys($this->serialized);
    }

    public function getRawFieldsAndMethods(): array
    {
        return array_map(fn ($f) => ['name' => $f, 'method' => false], $this->getFieldsAndMethodsNames());
    }

    public function getFieldsAndMethods(): array
    {
        return [];
    }
}