<?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\DB;
use Fisharebest\Webtrees\Elements\UnknownElement;
use Fisharebest\Webtrees\Family;
use Fisharebest\Webtrees\GedcomRecord;
use Fisharebest\Webtrees\Http\ViewResponseTrait;
use Fisharebest\Webtrees\I18N;
use Fisharebest\Webtrees\Individual;
use Fisharebest\Webtrees\Registry;
use Fisharebest\Webtrees\Services\TreeService;
use Fisharebest\Webtrees\Tree;
use Fisharebest\Webtrees\Validator;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Server\RequestHandlerInterface;

use function array_merge;
use function e;
use function in_array;
use function uasort;

final class TreePrivacyPage implements RequestHandlerInterface
{
    use ViewResponseTrait;

    public function __construct(
        private readonly TreeService $tree_service,
    ) {
    }

    public function handle(ServerRequestInterface $request): ResponseInterface
    {
        $this->layout = 'layouts/administration';

        $tree  = Validator::attributes($request)->tree();
        $title = e($tree->name()) . ' — ' . I18N::translate('Privacy');

        return $this->viewResponse('admin/trees-privacy', [
            'all_tags'             => $this->tagsForPrivacy(),
            'count_trees'          => $this->tree_service->all()->count(),
            'privacy_constants'    => $this->privacyConstants(),
            'privacy_restrictions' => $this->privacyRestrictions(tree: $tree),
            'title'                => $title,
            'tree'                 => $tree,
        ]);
    }

    /**
     * Names of our privacy levels
     *
     * @return array<string,string>
     */
    private function privacyConstants(): array
    {
        return [
            'none'         => I18N::translate('Show to visitors'),
            'privacy'      => I18N::translate('Show to members'),
            'confidential' => I18N::translate('Show to managers'),
            'hidden'       => I18N::translate('Hide from everyone'),
        ];
    }

    /**
     * The current privacy restrictions for a tree.
     *
     * @return list<object{default_resn_id:int,resn:string,xref:string,record:GedcomRecord|null,label:string}>
     */
    private function privacyRestrictions(Tree $tree): array
    {
        return DB::table('default_resn')
            ->where('gedcom_id', '=', $tree->id())
            ->get()
            ->map(static function (object $row) use ($tree): object {
                $record = null;

                if ($row->xref !== null) {
                    $record = Registry::gedcomRecordFactory()->make($row->xref, $tree);
                }

                $label = '';

                if ($row->tag_type) {
                    $label = $row->tag_type;

                    foreach (['', Family::RECORD_TYPE . ':', Individual::RECORD_TYPE . ':'] as $prefix) {
                        $element = Registry::elementFactory()->make($prefix . $row->tag_type);

                        if (!$element instanceof UnknownElement) {
                            $label = $element->label();
                            break;
                        }
                    }
                }

                return (object) [
                    'default_resn_id' => (int) $row->default_resn_id,
                    'resn'            => $row->resn,
                    'record'          => $record,
                    'xref'            => $row->xref,
                    'label'           => $label,
                ];
            })
            ->sort(static fn (object $x, object $y): int => I18N::comparator()($x->label, $y->label))
            ->all();
    }

    /**
     * Generate a list of tags that can be used in privacy settings.
     *
     * @return array<string>
     */
    private function tagsForPrivacy(): array
    {
        $tags = [];

        $exclude = ['SEX'];

        foreach ([Family::RECORD_TYPE, Individual::RECORD_TYPE] as $record_type) {
            foreach (Registry::elementFactory()->make($record_type)->subtags() as $subtag => $occurrence) {
                if (!in_array($subtag, $exclude, true)) {
                    $tags[$subtag] = Registry::elementFactory()->make($record_type . ':' . $subtag)->label();
                }
            }
        }

        // SOUR overwrites INDI:SOUR
        $include = ['REPO', 'SOUR', 'SUBN'];

        foreach ($include as $tag) {
            $tags[$tag] = Registry::elementFactory()->make($tag) -> label();
        }

        uasort($tags, I18N::comparator());

        return array_merge(
            ['' => I18N::translate('All facts and events')],
            $tags
        );
    }
}
