<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsToMany;

class Permission extends Model
{
    use HasFactory;

    protected $fillable = [
        'name',
        'slug',
        'group_name',
        'description',
        'sort',
    ];

    protected $casts = [
        'sort' => 'integer',
    ];

    /**
     * 角色关联
     */
    public function roles(): BelongsToMany
    {
        return $this->belongsToMany(Role::class, 'role_permissions');
    }

    /**
     * 按分组获取权限
     */
    public static function getGroupedPermissions()
    {
        return static::orderBy('group_name')
            ->orderBy('sort')
            ->get()
            ->groupBy('group_name');
    }

    /**
     * 通过slug查找
     */
    public static function findBySlug(string $slug): ?self
    {
        return static::where('slug', $slug)->first();
    }
}