<?php
/************************************************************************
 * This file is part of EspoCRM.
 *
 * EspoCRM – Open Source CRM application.
 * Copyright (C) 2014-2026 EspoCRM, Inc.
 * Website: https://www.espocrm.com
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <https://www.gnu.org/licenses/>.
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License version 3.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
 * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
 ************************************************************************/

namespace Espo\ORM\Value;

use Espo\ORM\Entity;
use Espo\ORM\EventDispatcher;

class ValueAccessorFactory
{
    private ?GeneralValueFactory $generalValueFactory = null;
    private ?GeneralAttributeExtractor $generalAttributeExtractor = null;

    /**
     * @param AttributeExtractorFactory<object> $attributeExtractorFactory
     */
    public function __construct(
        private ValueFactoryFactory $valueFactoryFactory,
        private AttributeExtractorFactory $attributeExtractorFactory,
        private EventDispatcher $eventDispatcher
    ) {

        $this->subscribeToMetadataUpdate();
    }

    public function create(Entity $entity): ValueAccessor
    {
        return new ValueAccessor(
            $entity,
            $this->getGeneralValueFactory(),
            $this->getGeneralAttributeExtractor()
        );
    }

    private function getGeneralValueFactory(): GeneralValueFactory
    {
        if (!$this->generalValueFactory) {
            $this->generalValueFactory = new GeneralValueFactory($this->valueFactoryFactory);
        }

        return $this->generalValueFactory;
    }

    private function getGeneralAttributeExtractor(): GeneralAttributeExtractor
    {
        if (!$this->generalAttributeExtractor) {
            $this->generalAttributeExtractor = new GeneralAttributeExtractor($this->attributeExtractorFactory);
        }

        return $this->generalAttributeExtractor;
    }

    private function subscribeToMetadataUpdate(): void
    {
        $this->eventDispatcher->subscribeToMetadataUpdate(
            function () {
                $this->generalValueFactory = null;
                $this->generalAttributeExtractor = null;
            }
        );
    }
}
