<?php

namespace App\Jobs\StatusPipeline;

use App\AccountInterstitial;
use App\Bookmark;
use App\CollectionItem;
use App\DirectMessage;
use App\Jobs\MediaPipeline\MediaDeletePipeline;
use App\Like;
use App\Media;
use App\MediaTag;
use App\Mention;
use App\Notification;
use App\Report;
use App\Services\CollectionService;
use App\Services\NotificationService;
use App\Services\StatusService;
use App\Status;
use App\StatusArchived;
use App\StatusHashtag;
use App\StatusView;
use App\Transformer\ActivityPub\Verb\DeleteNote;
use App\Util\ActivityPub\HttpSignature;
use Cache;
use GuzzleHttp\Client;
use GuzzleHttp\Pool;
use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Bus\Dispatchable;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Queue\SerializesModels;
use Illuminate\Support\Facades\Log;
use League\Fractal;
use League\Fractal\Serializer\ArraySerializer;

class StatusDelete implements ShouldQueue
{
    use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;

    protected $status;

    /**
     * Delete the job if its models no longer exist.
     *
     * @var bool
     */
    public $deleteWhenMissingModels = true;

    public $timeout = 900;

    public $tries = 2;

    /**
     * Create a new job instance.
     *
     * @return void
     */
    public function __construct(Status $status)
    {
        $this->status = $status;
    }

    /**
     * Execute the job.
     *
     * @return void
     */
    public function handle()
    {
        $status = $this->status;

        // Verify status exists
        if (! $status) {
            Log::info('StatusDelete: Status no longer exists, skipping job');

            return;
        }

        $profile = $status->profile()->withTrashed()->first();

        // Verify profile exists
        if (! $profile) {
            Log::info("StatusDelete: Profile no longer exists for status {$status->id}, skipping job");

            return;
        }

        StatusService::del($status->id, true);
        if ($profile) {
            if (in_array($status->type, ['photo', 'photo:album', 'video', 'video:album', 'photo:video:album'])) {
                $profile->status_count = $profile->status_count - 1;
                $profile->save();
            }
        }

        Cache::forget('pf:atom:user-feed:by-id:'.$status->profile_id);

        if ((bool) config_cache('federation.activitypub.enabled') == true) {
            return $this->fanoutDelete($status);
        } else {
            return $this->unlinkRemoveMedia($status);
        }
    }

    public function unlinkRemoveMedia($status)
    {
        Media::whereStatusId($status->id)
            ->get()
            ->each(function ($media) {
                MediaDeletePipeline::dispatch($media);
            });

        if ($status->in_reply_to_id) {
            $parent = Status::findOrFail($status->in_reply_to_id);
            $parent->reply_count--;
            $parent->save();
            StatusService::del($parent->id);
        }

        Bookmark::whereStatusId($status->id)->delete();

        CollectionItem::whereObjectType('App\Status')
            ->whereObjectId($status->id)
            ->get()
            ->each(function ($col) {
                CollectionService::removeItem($col->collection_id, $col->object_id);
                $col->delete();
            });

        $dms = DirectMessage::whereStatusId($status->id)->get();
        foreach ($dms as $dm) {
            $not = Notification::whereItemType('App\DirectMessage')
                ->whereItemId($dm->id)
                ->first();
            if ($not) {
                NotificationService::del($not->profile_id, $not->id);
                $not->forceDeleteQuietly();
            }
            $dm->delete();
        }
        Like::whereStatusId($status->id)->delete();

        $mediaTags = MediaTag::where('status_id', $status->id)->get();
        foreach ($mediaTags as $mtag) {
            $not = Notification::whereItemType('App\MediaTag')
                ->whereItemId($mtag->id)
                ->first();
            if ($not) {
                NotificationService::del($not->profile_id, $not->id);
                $not->forceDeleteQuietly();
            }
            $mtag->delete();
        }
        Mention::whereStatusId($status->id)->forceDelete();

        Notification::whereItemType('App\Status')
            ->whereItemId($status->id)
            ->forceDelete();

        Report::whereObjectType('App\Status')
            ->whereObjectId($status->id)
            ->delete();

        StatusArchived::whereStatusId($status->id)->delete();
        StatusHashtag::whereStatusId($status->id)->delete();
        StatusView::whereStatusId($status->id)->delete();
        Status::whereInReplyToId($status->id)->update(['in_reply_to_id' => null]);

        AccountInterstitial::where('item_type', 'App\Status')
            ->where('item_id', $status->id)
            ->delete();

        $status->delete();

        return 1;
    }

    public function fanoutDelete($status)
    {
        $profile = $status->profile()->withTrashed()->first();

        if (! $profile) {
            return;
        }

        $audience = $status->profile->getAudienceInbox();

        $fractal = new Fractal\Manager;
        $fractal->setSerializer(new ArraySerializer);
        $resource = new Fractal\Resource\Item($status, new DeleteNote);
        $activity = $fractal->createData($resource)->toArray();

        $this->unlinkRemoveMedia($status);

        $payload = json_encode($activity);

        $client = new Client([
            'timeout' => config('federation.activitypub.delivery.timeout'),
        ]);

        $version = config('pixelfed.version');
        $appUrl = config('app.url');
        $userAgent = "(Pixelfed/{$version}; +{$appUrl})";

        $requests = function ($audience) use ($client, $activity, $profile, $payload, $userAgent) {
            foreach ($audience as $url) {
                $headers = HttpSignature::sign($profile, $url, $activity, [
                    'Content-Type' => 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"',
                    'User-Agent' => $userAgent,
                ]);
                yield function () use ($client, $url, $headers, $payload) {
                    return $client->postAsync($url, [
                        'curl' => [
                            CURLOPT_HTTPHEADER => $headers,
                            CURLOPT_POSTFIELDS => $payload,
                            CURLOPT_HEADER => true,
                        ],
                    ]);
                };
            }
        };

        $pool = new Pool($client, $requests($audience), [
            'concurrency' => config('federation.activitypub.delivery.concurrency'),
            'fulfilled' => function ($response, $index) {},
            'rejected' => function ($reason, $index) {},
        ]);

        $promise = $pool->promise();

        $promise->wait();

        return 1;
    }
}
