<?php

/**
 * @author Any
 * @description KISS
 * @date 2021年6月15日
 * @version 1.0.0
 * 
 * _____LOG_____
 * 
 */
namespace app\models\common;


use app\models\Cart;
use app\models\Goods;
use app\models\GoodsAttr;
use app\models\Model;
use yii\helpers\ArrayHelper;
use app\components\Serializer;

class CommonCartAddForm extends Model 
{
    public $goods_id;
    public $attr;
    public $num;
    
    public $plugin_sign;
    public $cx_mch_id;
    public $user_id;
    
    public function rules()
    {
        return [
            [['goods_id', 'num', 'attr', 'cx_mch_id', 'user_id'], 'integer'],
            [['cx_mch_id', 'user_id', 'goods_id', 'attr', 'num', 'plugin_sign'], 'required']            
        ];
    }
    
    public function save()
    {
        
        if (!$this->validate()) {
            return $this->getModelError();
        }

        try {
            Cart::cacheStatusSet(true);
            $goods = Goods::findOne(['id' => $this->goods_id]);
            if (!$goods) {
                throw new \Exception('商品不存在');
            }
            if ($goods->goodsHub->type == 1) {
                throw new \Exception('虚拟商品不允许加入购物车');
            }

            $attr = GoodsAttr::find()->alias('g')->where([
                'g.id' => $this->attr,
                'g.goods_id' => $this->goods_id,
                'g.is_delete' => 0,
            ])->innerJoinwith(['goods o' => function ($query) {
                $query->where([
                    'o.id' => $this->goods_id,
                    'o.cx_mch_id' => $this->cx_mch_id,
                    'o.is_delete' => 0,
                    'o.status' => 1,
                ]);
            }])->one();

            if (!$attr) {
                throw new \Exception('商品异常');
            }

            $this->num = $this->num > $attr->stock ? $attr->stock : $this->num;
            if ($this->num <= 0) {
                throw new \Exception('数量为空或库存为空');
            }

            $cart = Cart::findOne([
                'user_id' => $this->user_id,
                'goods_id' => $this->goods_id,
                'attr_id' => $this->attr,
                'cx_mch_id' => $this->cx_mch_id,
                'plugin_sign' => $this->plugin_sign,
                'is_delete' => 0,
            ]);

            if (!$cart) {
                $cart = new Cart();
                $cart->user_id = $this->user_id;
                $cart->goods_id = $this->goods_id;
                $cart->attr_id = $this->attr;
                $cart->num = 0;
                $cart->cx_mch_id = $this->cx_mch_id;
                $cart->plugin_sign = $this->plugin_sign;
                $cart->attr_info = (new Serializer())->encode(ArrayHelper::toArray($attr));
            };
            $cart->num += $this->num;
            if ($cart->num > $attr->stock) {
                return $this->apiReturnError('商品加购件数超过库存');
            }

            if ($cart->save()) {
                return $this->apiReturnSuccess('添加购物车成功');
            } else {
                throw new \Exception($this->getModelError($cart));
            }
        } catch (\Exception $e) {
            return $this->apiReturnError($e->getMessage());
        }        
    }
    

    public function __destruct()
    {
        Cart::cacheStatusSet(false);
    }    
}