<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class ShoppingCartItem extends Model
{
    /**
     * @var array
     */
    protected $casts = [
        'quantity' => 'int',
        'specs' => 'json',
    ];

    /**
     * @var array
     */
    protected $fillable = [
        'user_id',
        'sku_id',
        'name',
        'cover',
        'sell_price',
        'vip_price',
        'specs',
        'quantity',
    ];

    /**
     * 此购物车物品所属的商品
     */
    public function sku()
    {
        return $this->belongsTo(ProductSku::class)->withDefault(function ($sku, $item) {
            $sku->id = $item->sku_id;
            $sku->name = $item->name;
            $sku->cover = $item->cover;
            $sku->sell_price = $item->sell_price;
            $sku->vip_price = $item->vip_price;
            $sku->specs = $item->specs;
            $sku->stock = 0;
            $sku->release_at = null;
        });
    }
}