<?php

namespace App\Models;

use app\common\model\Storage;
use RuLong\Order\Contracts\Orderable;

class GoodsParams extends Model implements Orderable
{
    public static function boot()
    {
        parent::boot();

        self::created(function ($model) {
            $model->paramStocks()->create(
                [
                    'amount'    => $model->stock,
                    'goods_id'  => $model->goods_id ?? 0,
                    'rule_sign' => 'SHELVE_MANAGER',
                ]
            );
        });

        self::updated(function ($model) {
            $before_stock = $model->getOriginal('stock');
            $after_stock  = $model->stock;
            $change_stock = $after_stock - $before_stock;
            if ($change_stock != 0) {
                $rule = $change_stock > 0 ? 'PLUS_MANAGER' : 'MINUS_MANAGER';
                $model->paramStocks()->create(
                    [
                        'amount'    => $change_stock,
                        'goods_id'  => $model->goods_id ?? 0,
                        'rule_sign' => $rule,
                    ]
                );
            }
        });
    }

    public function goods()
    {
        return $this->belongsTo(Goods::class, 'goods_id', 'id');
    }

    public function getTitle()
    {
        return $this->goods->title . '-' . $this->value;
    }

    public function getPrice()
    {
        return $this->price;
    }

    public function getScore()
    {
        return $this->score;
    }

    public function getStock()
    {
        return $this->stock;
    }

    public function getSellerPrice()
    {
        return $this->cost;
    }

    public function deductStock($stock)
    {
        $this->decrement('stock', $stock);
    }

    public function addStock($stock)
    {
        $this->increment('stock', $stock);
    }

    protected function getStorageAttribute()
    {
        return $this->goods->storage;
    }

    public function paramStocks()
    {
        return $this->hasMany(GoodsParamStock::class, 'goods_param_id', 'id');
    }

    public function getStorage()
    {
        return $this->goods->storage;
    }

}