<?php
/**
 * Shopware 5
 * Copyright (c) shopware AG
 *
 * According to our dual licensing model, this program can be used either
 * under the terms of the GNU Affero General Public License, version 3,
 * or under a proprietary license.
 *
 * The texts of the GNU Affero General Public License with an additional
 * permission and of our proprietary license can be found at and
 * in the LICENSE file you have received along with this program.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * "Shopware" is a registered trademark of shopware AG.
 * The licensing of the program under the AGPLv3 does not imply a
 * trademark license. Therefore any rights, title and interest in
 * our trademarks remain entirely with us.
 */

namespace Shopware\Bundle\SearchBundleDBAL\ConditionHandler;

use Shopware\Bundle\SearchBundle\Condition\SearchTermCondition;
use Shopware\Bundle\SearchBundle\ConditionInterface;
use Shopware\Bundle\SearchBundleDBAL\ConditionHandlerInterface;
use Shopware\Bundle\SearchBundleDBAL\SearchTermQueryBuilderInterface;
use Shopware\Bundle\SearchBundleDBAL\QueryBuilder;
use Shopware\Bundle\StoreFrontBundle\Struct\ShopContextInterface;

/**
 * @category  Shopware
 * @package   Shopware\Bundle\SearchBundleDBAL\ConditionHandler
 * @copyright Copyright (c) shopware AG (http://www.shopware.de)
 */
class SearchTermConditionHandler implements ConditionHandlerInterface
{
    const STATE_INCLUDES_RANKING = 'ranking';

    /**
     * @var SearchTermQueryBuilderInterface
     */
    private $searchTermQueryBuilder;

    /**
     * @param SearchTermQueryBuilderInterface $searchTermQueryBuilder
     */
    public function __construct(SearchTermQueryBuilderInterface $searchTermQueryBuilder)
    {
        $this->searchTermQueryBuilder = $searchTermQueryBuilder;
    }

    /**
     * {@inheritdoc}
     */
    public function supportsCondition(ConditionInterface $condition)
    {
        return ($condition instanceof SearchTermCondition);
    }

    /**
     * {@inheritdoc}
     */
    public function generateCondition(
        ConditionInterface $condition,
        QueryBuilder $query,
        ShopContextInterface $context
    ) {
        /** @var SearchTermCondition $condition */
        $searchQuery = $this->searchTermQueryBuilder->buildQuery(
            $condition->getTerm()
        );

        //no matching products found by the search query builder.
        //add condition that the result contains no product.
        if ($searchQuery == null) {
            $query->andWhere('0 = 1');
            return;
        }

        $queryString = $searchQuery->getSQL();

        $query->addSelect('searchTable.*');
        $query->addState(self::STATE_INCLUDES_RANKING);

        $query->innerJoin(
            'product',
            '(' . $queryString . ')',
            'searchTable',
            'searchTable.product_id = product.id'
        );
    }
}
