<?php

declare(strict_types = 1);

// {{{ License

// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social 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.
//
// GNU social 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 GNU social.  If not, see <http://www.gnu.org/licenses/>.

// }}}

namespace Component\Search;

use App\Core\Event;
use App\Core\Form;
use function App\Core\I18n\_m;
use App\Core\Modules\Component;
use App\Entity\Actor;
use App\Util\Common;
use App\Util\Exception\RedirectException;
use App\Util\Formatting;
use Doctrine\Common\Collections\ExpressionBuilder;
use Symfony\Component\Form\Extension\Core\Type\SubmitType;
use Symfony\Component\Form\Extension\Core\Type\TextType;
use Symfony\Component\Form\FormView;
use Symfony\Component\Form\SubmitButton;
use Symfony\Component\HttpFoundation\Request;

class Search extends Component
{
    public function onAddRoute($r)
    {
        $r->connect('search', '/search', Controller\Search::class);
    }

    public static function searchForm(Request $request, ?string $query = null, bool $add_subscribe = false): FormView
    {
        $actor = Common::actor();
        if (\is_null($actor)) {
            $add_subscribe = false;
        }

        $form_definition = [
            ['search_query', TextType::class, [
                'attr' => ['placeholder' => _m('Input desired query...'), 'value' => $query],
            ]],
        ];

        if ($add_subscribe) {
            $form_definition[] = [
                'title', TextType::class, ['label' => _m('Title'), 'required' => false, 'attr' => ['title' => _m('Title for this new feed in your left panel')]],
            ];
            $form_definition[] = [
                'subscribe_to_search',
                SubmitType::class,
                [
                    'label' => _m('Subscribe to this search'),
                    'attr'  => [
                        'title' => _m('Add this search as a feed in your feeds section of the left panel'),
                    ],
                ],
            ];
        }

        $form_definition[] = [
            $form_name = 'submit_search',
            SubmitType::class,
            [
                'label' => _m('Search'),
                'attr'  => [
                    //'class' => 'button-container search-button-container',
                    'title' => _m('Query notes for specific tags.'),
                ],
            ],
        ];

        $form = Form::create($form_definition);

        if ('POST' === $request->getMethod() && $request->request->has($form_name)) {
            $form->handleRequest($request);
            if ($form->isSubmitted() && $form->isValid()) {
                $data     = $form->getData();
                $redirect = false;
                if ($add_subscribe) {
                    /** @var SubmitButton $subscribe */
                    $subscribe = $form->get('subscribe_to_search');
                    if ($subscribe->isClicked()) {
                        // TODO ensure title is set
                        Event::handle('AppendFeed', [$actor, $data['title'], 'search', ['q' => $data['search_query']]]);
                        $redirect = true;
                    }
                }
                /** @var SubmitButton $submit */
                $submit = $form->get($form_name);
                if ($submit->isClicked() || $redirect) {
                    throw new RedirectException('search', ['q' => $data['search_query']]);
                }
            }
        }
        return $form->createView();
    }

    /**
     * Add the search form to the site header
     *
     * @throws RedirectException
     */
    public function onAddExtraHeaderForms(Request $request, array &$elements)
    {
        $elements[] = self::searchForm($request);
        return Event::next;
    }

    /**
     * Output our dedicated stylesheet
     *
     * @param array $styles stylesheets path
     *
     * @return bool hook value; true means continue processing, false means stop
     */
    public function onEndShowStyles(array &$styles, string $route): bool
    {
        $styles[] = 'components/Search/assets/css/view.css';
        return Event::next;
    }

    public function onSearchCreateExpression(ExpressionBuilder $eb, string $term, ?string $language, &$note_expr, &$actor_expr): bool
    {
        $include_term = str_contains($term, ':') ? explode(':', $term)[1] : $term;
        if (Formatting::startsWith($term, ['note-types:', 'notes-incude:', 'note-filter:'])) {
            if (\is_null($note_expr)) {
                $note_expr = [];
            }
            if (array_intersect(explode(',', $include_term), ['text', 'words']) !== []) {
                $note_expr[] = $eb->neq('note.rendered', null);
            } else {
                $note_expr[] = $eb->eq('note.rendered', null);
            }
        } elseif (Formatting::startsWith($term, ['actor-types:', 'actors-incude:', 'actor-filter:'])) {
            if (\is_null($actor_expr)) {
                $actor_expr = [];
            }
            foreach ([
                Actor::PERSON => ['person', 'people'],
                Actor::GROUP => ['group', 'groups'],
                Actor::ORGANIZATION => ['org', 'orgs', 'organization', 'organizations', 'organisation', 'organisations'],
                Actor::BUSINESS => ['business', 'businesses'],
                Actor::BOT => ['bot', 'bots'],
            ] as $type => $match) {
                if (array_intersect(explode(',', $include_term), $match) !== []) {
                    $actor_expr[] = $eb->eq('actor.type', $type);
                } else {
                    $actor_expr[] = $eb->neq('actor.type', $type);
                }
            }
        } elseif (!str_contains($term, ':')) {
            $note_expr = $eb->contains('note.rendered', $term);
        }
        return Event::next;
    }
}