<?php

declare(strict_types = 1);

namespace Plugin\ActivityPub\Util\Model\AS2ToEntity;

use App\Core\DB\DB;
use App\Core\Event;
use App\Entity\Actor;
use App\Entity\Note;
use App\Util\Exception\ClientException;
use App\Util\Formatting;
use DateTime;
use Plugin\ActivityPub\ActivityPub;
use Plugin\ActivityPub\Entity\ActivitypubActivity;

abstract class AS2ToEntity
{
    public static function activity_stream_two_verb_to_gs_verb($verb)
    {
        return match ($verb) {
            'Create' => 'create',
            default  => throw new ClientException('Invalid verb'),
        };
    }

    public static function activity_stream_two_object_type_to_gs_table($verb)
    {
        return match ($verb) {
            'Note'  => 'note',
            default => throw new ClientException('Invalid verb'),
        };
    }

    /**
     * @throws ClientException
     */
    public static function store(array $activity, ?string $source = null): array
    {
        $act = ActivitypubActivity::getWithPK(['activity_uri' => $activity['id']]);
        if (\is_null($act)) {
            $actor = ActivityPub::getActorByUri($activity['actor']);
            $map   = [
                'activity_uri' => $activity['id'],
                'actor_id'     => $actor->getId(),
                'verb'         => self::activity_stream_two_verb_to_gs_verb($activity['type']),
                'object_type'  => self::activity_stream_two_object_type_to_gs_table($activity['object']['type']),
                'object_uri'   => $activity['object']['id'],
                'is_local'     => false,
                'created'      => new DateTime($activity['published'] ?? 'now'),
                'modified'     => new DateTime(),
                'source'       => $source,
            ];

            $act = new ActivitypubActivity();
            foreach ($map as $prop => $val) {
                $set = Formatting::snakeCaseToCamelCase("set_{$prop}");
                $act->{$set}($val);
            }

            $obj = null;
            switch ($activity['object']['type']) {
                case 'Note':
                    $obj = AS2ToNote::translate($activity['object'], $source, $activity['actor'], $act);
                    break;
                default:
                    if (!Event::handle('ActivityPubObject', [$activity['object']['type'], $activity['object'], &$obj])) {
                        throw new ClientException('Unsupported Object type.');
                    }
                    break;
            }

            DB::persist($obj);
            $act->setObjectId($obj->getId());
            DB::persist($act);
        } else {
            $actor = Actor::getById($act->getActorId());
            switch ($activity['object']['type']) {
                case 'Note':
                    $obj = Note::getWithPK(['id' => $act->getObjectId()]);
                    break;
                default:
                    if (!Event::handle('ActivityPubObject', [$activity['object']['type'], $activity['object'], &$obj])) {
                        throw new ClientException('Unsupported Object type.');
                    }
                    break;
            }
        }

        return [$actor, $act, $obj];
    }
}