<?php

declare(strict_types=1);

namespace App\Exceptions\Artist;

use App\Models\Genre;
use DomainException;

/**
 * Raised by GenreService::delete when artists still reference this genre
 * via `default_genre_id`. The frontend must offer to re-bind those
 * artists to a different genre (or null) before retrying.
 */
final class GenreInUseException extends DomainException
{
    public function __construct(
        public readonly Genre $genre,
        public readonly int $referencingArtistsCount,
    ) {
        parent::__construct(sprintf(
            'Genre "%s" cannot be deleted: %d artist(s) reference it as their default genre.',
            $genre->name,
            $referencingArtistsCount,
        ));
    }
}