<?php
/************************************************************************
 * This file is part of EspoCRM.
 *
 * EspoCRM - Open Source CRM application.
 * Copyright (C) 2014-2023 Yurii Kuznietsov, Taras Machyshyn, Oleksii Avramenko
 * Website: https://www.espocrm.com
 *
 * EspoCRM is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * EspoCRM 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with EspoCRM. If not, see http://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 General Public License version 3.
 *
 * In accordance with Section 7(b) of the GNU General Public License version 3,
 * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
 ************************************************************************/

namespace Espo\Tools\ActionHistory;

use Espo\Core\Record\Collection as RecordCollection;
use Espo\Entities\ActionHistoryRecord;
use Espo\Core\FieldProcessing\ListLoadProcessor;
use Espo\Core\ORM\EntityManager;
use Espo\Core\Utils\Metadata;
use Espo\Core\Utils\Util;

use Espo\Entities\User;

class Service
{
    private Metadata $metadata;
    private EntityManager $entityManager;
    private User $user;
    private ListLoadProcessor $listLoadProcessor;

    public function __construct(
        Metadata $metadata,
        EntityManager $entityManager,
        User $user,
        ListLoadProcessor $listLoadProcessor
    ) {
        $this->metadata = $metadata;
        $this->entityManager = $entityManager;
        $this->user = $user;
        $this->listLoadProcessor = $listLoadProcessor;
    }

    /**
     * @return RecordCollection<ActionHistoryRecord>
     */
    public function getLastViewed(?int $maxSize, ?int $offset): RecordCollection
    {
        $scopes = $this->metadata->get('scopes');

        $targetTypeList = array_filter(
            array_keys($scopes),
            function ($item) use ($scopes) {
                return !empty($scopes[$item]['object']) || !empty($scopes[$item]['lastViewed']);
            }
        );

        $maxSize = $maxSize ?? 0;
        $offset = $offset ?? 0;

        $collection = $this->entityManager
            ->getRDBRepositoryByClass(ActionHistoryRecord::class)
            ->where([
                'userId' => $this->user->getId(),
                'action' => ActionHistoryRecord::ACTION_READ,
                'targetType' => $targetTypeList,
            ])
            ->order('MAX:createdAt', 'DESC')
            ->select([
                'targetId',
                'targetType',
                'MAX:number',
                ['MAX:createdAt', 'createdAt'],
            ])
            ->group(['targetId', 'targetType'])
            ->limit($offset, $maxSize + 1)
            ->find();

        foreach ($collection as $entity) {
            $this->listLoadProcessor->process($entity);

            $entity->set('id', Util::generateId());
        }

        return RecordCollection::createNoCount($collection,  $maxSize);
    }
}