<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
declare(strict_types=1);

namespace Magento\RelatedProductGraphQl\Model\Resolver;

use Magento\Catalog\Model\Product\Link;
use Magento\CatalogGraphQl\Model\Resolver\Product\ProductFieldsSelector;
use Magento\Framework\Exception\LocalizedException;
use Magento\RelatedProductGraphQl\Model\DataProvider\RelatedProductDataProvider;
use Magento\Framework\GraphQl\Config\Element\Field;
use Magento\Framework\GraphQl\Query\ResolverInterface;
use Magento\Framework\GraphQl\Schema\Type\ResolveInfo;

/**
 * UpSell Products Resolver
 */
class UpSellProducts implements ResolverInterface
{
    /**
     * @var ProductFieldsSelector
     */
    private $productFieldsSelector;

    /**
     * @var RelatedProductDataProvider
     */
    private $relatedProductDataProvider;

    /**
     * @param ProductFieldsSelector $productFieldsSelector
     * @param RelatedProductDataProvider $relatedProductDataProvider
     */
    public function __construct(
        ProductFieldsSelector $productFieldsSelector,
        RelatedProductDataProvider $relatedProductDataProvider
    ) {
        $this->productFieldsSelector = $productFieldsSelector;
        $this->relatedProductDataProvider = $relatedProductDataProvider;
    }

    /**
     * @inheritdoc
     */
    public function resolve(Field $field, $context, ResolveInfo $info, ?array $value = null, ?array $args = null)
    {
        if (!isset($value['model'])) {
            throw new LocalizedException(__('"model" value should be specified'));
        }
        $product = $value['model'];
        $fields = $this->productFieldsSelector->getProductFieldsFromInfo($info, 'upsell_products');

        $data = $this->relatedProductDataProvider->getData($product, $fields, Link::LINK_TYPE_UPSELL);
        return $data;
    }
}