<?php

namespace App\Models;

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

class Role extends Model
{
    use HasFactory;

    protected $fillable = [
        'name',
        'slug',
        'description',
        'level',
        'guard_name',
    ];

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

    /**
     * 权限关联
     */
    public function permissions(): BelongsToMany
    {
        return $this->belongsToMany(Permission::class, 'role_permissions');
    }

    /**
     * 用户关联
     */
    public function users(): BelongsToMany
    {
        return $this->belongsToMany(User::class, 'user_roles');
    }

    /**
     * 同步权限
     */
    public function syncPermissions(array $permissionIds): void
    {
        $this->permissions()->sync($permissionIds);
    }

    /**
     * 分配权限
     */
    public function givePermissionTo(Permission $permission): void
    {
        $this->permissions()->syncWithoutDetaching([$permission->id]);
    }

    /**
     * 移除权限
     */
    public function revokePermissionTo(Permission $permission): void
    {
        $this->permissions()->detach([$permission->id]);
    }

    /**
     * 判断是否有某权限
     */
    public function hasPermission(string $slug): bool
    {
        return $this->permissions()->where('slug', $slug)->exists();
    }

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