<?php

declare(strict_types=1);

namespace App\Uploads\Jobs;

use App\Services\Uploads\UploadScanService;
use App\Uploads\Jobs\PreviewGenerationJob;
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\DB;
use Illuminate\Support\Facades\Storage;

final class VirusScanJob implements ShouldQueue
{
    use Dispatchable;
    use InteractsWithQueue;
    use Queueable;
    use SerializesModels;

    public int $tries = 3;
    public int $timeout = 30;

    public function __construct(private readonly string $uploadId)
    {
    }

    public function handle(UploadScanService $scanner): void
    {
        $upload = DB::table('uploads')->where('id', $this->uploadId)->first();
        if (! $upload || (string) $upload->status !== 'draft') {
            return;
        }

        $this->advanceProcessingState('scanning', ['pending_scan', 'scanning']);

        $files = DB::table('upload_files')
            ->where('upload_id', $this->uploadId)
            ->whereIn('type', ['main', 'screenshot'])
            ->get(['path']);

        foreach ($files as $file) {
            $path = (string) ($file->path ?? '');
            if ($path === '' || ! Storage::disk('local')->exists($path)) {
                continue;
            }

            $absolute = Storage::disk('local')->path($path);
            $result = $scanner->scan($absolute);

            if (! $result->ok) {
                DB::table('uploads')->where('id', $this->uploadId)->update([
                    'status' => 'rejected',
                    'processing_state' => 'rejected',
                    'updated_at' => now(),
                ]);

                Storage::disk('local')->deleteDirectory('tmp/drafts/' . $this->uploadId);
                return;
            }
        }

        DB::table('uploads')->where('id', $this->uploadId)->update([
            'is_scanned' => true,
            'updated_at' => now(),
        ]);

        $this->advanceProcessingState('generating_preview', ['pending_scan', 'scanning', 'generating_preview']);

        PreviewGenerationJob::dispatch($this->uploadId);
    }

    /**
     * @param array<int, string> $allowedCurrentStates
     */
    private function advanceProcessingState(string $targetState, array $allowedCurrentStates): void
    {
        DB::table('uploads')
            ->where('id', $this->uploadId)
            ->where('status', 'draft')
            ->where(function ($query) use ($allowedCurrentStates): void {
                $query->whereNull('processing_state')
                    ->orWhereIn('processing_state', $allowedCurrentStates);
            })
            ->update([
                'processing_state' => $targetState,
                'updated_at' => now(),
            ]);
    }
}