<?php

declare(strict_types=1);

namespace App\Services\Artist;

use App\Exceptions\Artist\GenreInUseException;
use App\Models\Artist;
use App\Models\Genre;
use App\Models\Organisation;
use Illuminate\Support\Facades\DB;

final class GenreService
{
    /**
     * @param  array<string, mixed>  $attributes
     */
    public function create(Organisation $organisation, array $attributes): Genre
    {
        return DB::transaction(function () use ($organisation, $attributes): Genre {
            $genre = new Genre($attributes);
            $genre->organisation_id = $organisation->id;
            $genre->is_active = $attributes['is_active'] ?? true;
            $genre->save();

            return $genre->refresh();
        });
    }

    /**
     * @param  array<string, mixed>  $attributes
     */
    public function update(Genre $genre, array $attributes): Genre
    {
        unset($attributes['organisation_id']);

        $genre->fill($attributes);
        $genre->save();

        return $genre->refresh();
    }

    /**
     * Hard delete (genres are config — no soft-delete column on the table).
     * Blocks if any artist references this genre as `default_genre_id`.
     */
    public function delete(Genre $genre): void
    {
        $referencingCount = Artist::query()
            ->where('default_genre_id', $genre->id)
            ->count();

        if ($referencingCount > 0) {
            throw new GenreInUseException($genre, $referencingCount);
        }

        $genre->delete();
    }
}