<?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 Plugin\Favourite\Controller;

use App\Core\DB;
use App\Core\Event;
use App\Core\Form;
use App\Core\Log;
use App\Core\Router;
use App\Entity\Activity;
use App\Entity\Actor;
use App\Entity\LocalUser;
use App\Entity\Note;
use App\Util\Common;
use App\Util\Exception\ClientException;
use App\Util\Exception\InvalidFormException;
use App\Util\Exception\NoLoggedInUser;
use App\Util\Exception\NoSuchNoteException;
use App\Util\Exception\RedirectException;
use App\Util\Exception\ServerException;
use Component\Collection\Util\Controller\FeedController;
use Component\Notification\Entity\Attention;
use function App\Core\I18n\_m;
use Symfony\Component\Form\Extension\Core\Type\SubmitType;
use Symfony\Component\HttpFoundation\Request;

class Favourite extends FeedController
{
    /**
     * @throws InvalidFormException
     * @throws NoLoggedInUser
     * @throws NoSuchNoteException
     * @throws RedirectException
     * @throws ServerException
     */
    public function favouriteAddNote(Request $request, int $id): bool|array
    {
        $user               = Common::ensureLoggedIn();
        $actor_id           = $user->getId();
        $opts               = ['id' => $id];
        $add_favourite_note = DB::findOneBy(Note::class, $opts);
        if (\is_null($add_favourite_note)) {
            throw new NoSuchNoteException();
        }

        $form_add_to_favourite = Form::create([
            ['add_favourite', SubmitType::class,
                [
                    'label' => _m('Favourite note!'),
                    'attr'  => [
                        'title' => _m('Favourite this note!'),
                    ],
                ],
            ],
        ]);

        $form_add_to_favourite->handleRequest($request);

        if ($form_add_to_favourite->isSubmitted()) {
            if (!\is_null($activity = \Plugin\Favourite\Favourite::favourNote(note_id: $id, actor_id: $actor_id))) {
                $actor = Actor::getById($actor_id);
                foreach ($actor->getSubscribers() as $subscriber) {
                    $target_id = $subscriber->getId();
                    DB::persist(Attention::create(['object_type' => Activity::schemaName(), 'object_id' => $activity->getId(), 'target_id' => $target_id]));
                    $effective_attentions[$target_id] = $subscriber;
                }
                DB::flush();
                Event::handle('NewNotification', [$actor, $activity, $activity->getAttentionTargets(), _m('{actor_id} favoured note {note_id}.', ['{actor_id}' => $actor->getId(), '{note_id}' => $activity->getObjectId()])]);
            } else {
                throw new ClientException(_m('Note already favoured!'));
            }

            // Redirect user to where they came from
            // Prevent open redirect
            if (!\is_null($from = $this->string('from'))) {
                if (Router::isAbsolute($from)) {
                    Log::warning("Actor {$actor_id} attempted to favourite a note and then get redirected to another host, or the URL was invalid ({$from})");
                    throw new ClientException(_m('Can not redirect to outside the website from here'), 400); // 400 Bad request (deceptive)
                } else {
                    // TODO anchor on element id
                    throw new RedirectException(url: $from);
                }
            } else {
                // If we don't have a URL to return to, go to the instance root
                throw new RedirectException('root');
            }
        }

        return [
            '_template'     => 'favourite/add_to_favourites.html.twig',
            'note'          => $add_favourite_note,
            'add_favourite' => $form_add_to_favourite->createView(),
        ];
    }

    /**
     * @throws InvalidFormException
     * @throws NoLoggedInUser
     * @throws NoSuchNoteException
     * @throws RedirectException
     * @throws ServerException
     */
    public function favouriteRemoveNote(Request $request, int $id): array
    {
        $user                  = Common::ensureLoggedIn();
        $actor_id              = $user->getId();
        $opts                  = ['id' => $id];
        $remove_favourite_note = DB::findOneBy(Note::class, $opts);
        if (\is_null($remove_favourite_note)) {
            throw new NoSuchNoteException();
        }

        $form_remove_favourite = Form::create([
            ['remove_favourite', SubmitType::class,
                [
                    'label' => _m('Remove favourite'),
                    'attr'  => [
                        'title' => _m('Remove note from favourites.'),
                    ],
                ],
            ],
        ]);

        $form_remove_favourite->handleRequest($request);
        if ($form_remove_favourite->isSubmitted()) {
            if (!\is_null($activity = \Plugin\Favourite\Favourite::unfavourNote(note_id: $id, actor_id: $actor_id))) {
                $actor = Actor::getById($actor_id);
                foreach ($actor->getSubscribers() as $subscriber) {
                    $target_id = $subscriber->getId();
                    DB::persist(Attention::create(['object_type' => Activity::schemaName(), 'object_id' => $activity->getId(), 'target_id' => $target_id]));
                    $effective_attentions[$target_id] = $subscriber;
                }
                DB::flush();
                Event::handle('NewNotification', [$actor, $activity, $activity->getAttentionTargets(), _m('{actor_id} unfavoured note {note_id}.', ['{actor_id}' => $actor->getId(), '{note_id}' => $activity->getObjectId()])]);
            } else {
                throw new ClientException(_m('Note already unfavoured!'));
            }

            // Redirect user to where they came from
            // Prevent open redirect
            if (!\is_null($from = $this->string('from'))) {
                if (Router::isAbsolute($from)) {
                    Log::warning("Actor {$actor_id} attempted to reply to a note and then get redirected to another host, or the URL was invalid ({$from})");
                    throw new ClientException(_m('Can not redirect to outside the website from here'), 400); // 400 Bad request (deceptive)
                } else {
                    // TODO anchor on element id
                    throw new RedirectException(url: $from);
                }
            } else {
                // If we don't have a URL to return to, go to the instance root
                throw new RedirectException('root');
            }
        }

        $note = DB::findOneBy(Note::class, ['id' => $id]);
        return [
            '_template'        => 'favourite/remove_from_favourites.html.twig',
            'note'             => $note,
            'remove_favourite' => $form_remove_favourite->createView(),
        ];
    }

    public function favouritesViewByActorId(Request $request, int $id)
    {
        $notes = DB::dql(
            <<< 'EOF'
                select n from note n
                join note_favourite f with n.id = f.note_id
                where f.actor_id = :id
                order by f.created DESC
                EOF,
            ['id' => $id],
        );

        return [
            '_template'  => 'collection/notes.html.twig',
            'page_title' => 'Favourites',
            'notes'      => $notes,
        ];
    }

    public function favouritesViewByActorNickname(Request $request, string $nickname)
    {
        $user = DB::findOneBy(LocalUser::class, ['nickname' => $nickname]);
        return self::favouritesViewByActorId($request, $user->getId());
    }

    /**
     *  Reverse favourites stream
     *
     * @throws NoLoggedInUser user not logged in
     *
     * @return array template
     */
    public function reverseFavouritesViewByActorId(Request $request, int $id): array
    {
        $notes = DB::dql(
            <<< 'EOF'
                select n from note n
                join note_favourite f with n.id = f.note_id
                where f.actor_id != :id
                and n.actor_id = :id
                order by f.created DESC
                EOF,
            ['id' => $id],
        );

        return [
            '_template'  => 'collection/notes.html.twig',
            'page_title' => 'Reverse favourites feed.',
            'notes'      => $notes,
        ];
    }

    public function reverseFavouritesViewByActorNickname(Request $request, string $nickname)
    {
        $user = DB::findOneBy(LocalUser::class, ['nickname' => $nickname]);
        return self::reverseFavouritesViewByActorId($request, $user->getId());
    }
}