<?php

declare(strict_types=1);

namespace App\Services\Artworks;

use App\DTOs\Artworks\ArtworkDraftResult;
use App\Models\Artwork;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Str;

final class ArtworkDraftService
{
    public function createDraft(int $userId, string $title, ?string $description, ?int $categoryId = null): ArtworkDraftResult
    {
        return DB::transaction(function () use ($userId, $title, $description, $categoryId) {
            $slug = $this->uniqueSlug($title);

            $artwork = Artwork::create([
                'user_id' => $userId,
                'title' => $title,
                'slug' => $slug,
                'description' => $description,
                'file_name' => 'pending',
                'file_path' => '',
                'file_size' => 0,
                'mime_type' => 'application/octet-stream',
                'width' => 1,
                'height' => 1,
                'is_public' => false,
                'is_approved' => false,
                'published_at' => null,
            ]);

            // Attach the selected category to the artwork pivot table
            if ($categoryId !== null && \App\Models\Category::where('id', $categoryId)->exists()) {
                $artwork->categories()->sync([$categoryId]);
            }

            return new ArtworkDraftResult((int) $artwork->id, 'draft');
        });
    }

    private function uniqueSlug(string $title): string
    {
        $base = Str::slug($title);
        $base = $base !== '' ? $base : 'artwork';

        for ($i = 0; $i < 5; $i++) {
            $suffix = Str::lower(Str::random(6));
            $slug = Str::limit($base . '-' . $suffix, 160, '');

            if (! Artwork::where('slug', $slug)->exists()) {
                return $slug;
            }
        }

        return Str::limit($base . '-' . Str::uuid()->toString(), 160, '');
    }
}
