<?php
/**
 * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
 *
 * Copyright (C) 2019 - 2022 Jan Böhmer (https://github.com/jbtronics)
 *
 * 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/>.
 */

namespace App\Repository;

use App\Entity\Base\AbstractPartsContainingDBElement;
use App\Entity\Base\PartsContainingRepositoryInterface;
use App\Entity\Parts\Part;
use InvalidArgumentException;

abstract class AbstractPartsContainingRepository extends StructuralDBElementRepository implements PartsContainingRepositoryInterface
{
    /**
     * Returns all parts associated with this element.
     *
     * @param  object  $element  the element for which the parts should be determined
     * @param  array  $order_by  The order of the parts. Format ['name' => 'ASC']
     *
     * @return Part[]
     */
    abstract public function getParts(object $element, array $order_by = ['name' => 'ASC']): array;

    /**
     * Gets the count of the parts associated with this element.
     *
     * @param  object  $element  the element for which the parts should be determined
     * @return int
     */
    abstract public function getPartsCount(object $element): int;

    /**
     * Returns the count of the parts associated with this element and all its children.
     * Please be aware that this function is pretty slow on large trees!
     * @param  AbstractPartsContainingDBElement  $element
     * @return int
     */
    public function getPartsCountRecursive(AbstractPartsContainingDBElement $element): int
    {
        $count = $this->getPartsCount($element);

        foreach ($element->getChildren() as $child) {
            $count += $this->getPartsCountRecursive($child);
        }

        return $count;
    }

    protected function getPartsByField(object $element, array $order_by, string $field_name): array
    {
        if (!$element instanceof AbstractPartsContainingDBElement) {
            throw new InvalidArgumentException('$element must be an instance of AbstractPartContainingDBElement!');
        }

        $repo = $this->getEntityManager()->getRepository(Part::class);

        return $repo->findBy([$field_name => $element], $order_by);
    }

    protected function getPartsCountByField(object $element, string $field_name): int
    {
        if (!$element instanceof AbstractPartsContainingDBElement) {
            throw new InvalidArgumentException('$element must be an instance of AbstractPartContainingDBElement!');
        }

        $repo = $this->getEntityManager()->getRepository(Part::class);

        return $repo->count([$field_name => $element]);
    }
}