<?php

/**
 * webtrees: online genealogy
 * Copyright (C) 2026 webtrees development team
 * This program 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.
 * 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 General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <https://www.gnu.org/licenses/>.
 */

declare(strict_types=1);

namespace Fisharebest\Webtrees\Http\RequestHandlers;

use Fisharebest\Webtrees\Http\ViewResponseTrait;
use Fisharebest\Webtrees\I18N;
use Fisharebest\Webtrees\Services\PendingChangesService;
use Fisharebest\Webtrees\Validator;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Server\RequestHandlerInterface;

use function route;

final class PendingChanges implements RequestHandlerInterface
{
    use ViewResponseTrait;

    // Some servers may not have enough resources to show all the changes.
    private const int MAX_CHANGES = 1000;

    public function __construct(
        private readonly PendingChangesService $pending_changes_service,
    ) {
    }

    public function handle(ServerRequestInterface $request): ResponseInterface
    {
        $tree        = Validator::attributes($request)->tree();
        $n           = Validator::queryParams($request)->integer('n', self::MAX_CHANGES);
        $default_url = route(TreePage::class, ['tree' => $tree->name()]);
        $url         = Validator::queryParams($request)->isLocalUrl()->string('url', $default_url);
        $xrefs       = $this->pending_changes_service->pendingXrefs($tree);
        $changes     = $this->pending_changes_service->pendingChanges($tree, $n);
        $title       = I18N::translate('Pending changes');

        return $this->viewResponse('pending-changes-page', [
            'changes' => $changes,
            'count'   => $xrefs->count(),
            'title'   => $title,
            'tree'    => $tree,
            'url'     => $url,
        ]);
    }
}
