<?php

declare(strict_types=1);

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Support\Str;

class ClientCategory extends Model
{
    protected $fillable = [
        'name', 'slug', 'parent_id', 'icon', 'color',
        'description', 'is_system', 'sort_order',
    ];

    protected $casts = [
        'is_system'  => 'boolean',
        'sort_order' => 'integer',
    ];

    // ── Relationships ────────────────────────────────────────────

    public function parent(): BelongsTo
    {
        return $this->belongsTo(ClientCategory::class, 'parent_id');
    }

    public function children(): HasMany
    {
        return $this->hasMany(ClientCategory::class, 'parent_id')->orderBy('sort_order');
    }

    public function clients(): HasMany
    {
        return $this->hasMany(Client::class, 'category_id');
    }

    // ── Scopes ───────────────────────────────────────────────────

    public function scopeRoots($query)
    {
        return $query->whereNull('parent_id')->orderBy('sort_order');
    }

    public function scopeTopLevel($query)
    {
        return $query->whereNull('parent_id');
    }

    // ── Accessors ────────────────────────────────────────────────

    public function getFullNameAttribute(): string
    {
        return $this->parent
            ? $this->parent->name . ' › ' . $this->name
            : $this->name;
    }

    // ── Events ───────────────────────────────────────────────────

    protected static function boot(): void
    {
        parent::boot();

        static::creating(function (ClientCategory $cat): void {
            if (empty($cat->slug)) {
                $cat->slug = Str::slug($cat->name);
            }
        });
    }
}