<?php

namespace addons\Mch\common\models;

use yii\redis\Connection;

class MchCart extends \common\models\base\BaseActiveRecord
{
    public static $expire_time = 7 * 24 * 3600;//购物车内商品的有效期
    public static $key = 'mch_cart:';//购物车hash key
    public static $mall_key = 'mall_cart_set:';//商城购车user_id计数键值
    public static $pre = 'user_id_';
//    public static $field = 'attr_id_';//字段
    public static $field = '';//字段
    public static $redis_index = 4;


    /**
     * 获取购物车列表数据
     * @param $user_id
     * @return mixed
     */
    public static function getCartList($user_id)
    {
        $key = self::$key . $user_id;
        return \Yii::$app->redis->hgetall($key);
    }

    /**
     * 添加购物车
     * @param $params
     */
    public static function addCart($params)
    {
        $key = self::$key . $params['user_id'];
        $field = self::$field . $params['attr_id'];
        $data = \Yii::$app->redis->hget($key,$field);
        if(!empty($data)){
            $data = json_decode($data,true);
            $data['num'] += $params['num'];
            if(!empty($params['buy_limit_nums'])&&$data['num']<$params['buy_limit_nums']) throw new \Exception('最低起购数量是'.$params['buy_limit_nums']);
            if(!empty($params['buy_limit_total_num'])&&$data['num']>$params['buy_limit_total_num']) throw new \Exception('商品限购总数'.$params['buy_limit_total_num']);
            \Yii::$app->redis->hset($key, $field, json_encode($data));
        }else{
            if(!empty($params['buy_limit_total_num'])&&$params['num']>$params['buy_limit_total_num']) throw new \Exception('商品限购总数'.$params['buy_limit_total_num']);
            \Yii::$app->redis->hset($key, $field, json_encode($params));
        }
        \Yii::$app->redis->expire($key, self::$expire_time);
    }

    /**
     * 删除购物车
     * @param $params
     */
    public static function delCart($params)
    {
        $key = self::$key . $params['user_id'];
        foreach ($params['list'] as $v) {
            $field = self::$field . $v['attr_id'];
            \Yii::$app->redis->hdel($key, $field);
        }
        $cart_list = self::getCartList($params['user_id']);
        if(empty($cart_list)) self::delMallCart($params['mall_id'],$params['user_id']);
    }
    //清除购物车
    public static function clearCart($params)
    {
        $key = self::$key . $params['user_id'];
        \Yii::$app->redis->del($key);
        $cart_list = self::getCartList($params['user_id']);
        if(empty($cart_list)) self::delMallCart($params['mall_id'],$params['user_id']);
    }

    /**
     * @desc:用户购物车为空，把商城购车计数清除
     * @Author: hua
     * @Date: 2021/11/16
     * @Time: 12:02
     * @Copyright: copyright (c) 2021 广东七件事集团
     * @param $mall_id
     * @param $user_id
     */
    public static function delMallCart($mall_id,$user_id){
        \Yii::$app->redis->srem(self::$mall_key.$mall_id, self::$pre.$user_id);
    }

    /**
     * @desc:遍历商城购车计数集合数
     * @Author: hua
     * @Date: 2021/11/16
     * @Time: 14:33
     * @Copyright: copyright (c) 2021 广东七件事集团
     * @param $mall_id
     * @param $offset
     * @param $pattern
     * @param int $limit
     * @return mixed
     */
    public static function getMallCartList($mall_id,$offset,$pattern,$limit=10){
        $key = self::$mall_key . $mall_id;
        return \Yii::$app->redis->sscan($key,$offset,'MATCH',$pattern,'COUNT',$limit);
    }

    /**
     * 减少购物车商品数量
     * 
     * @param array $params[user_id=>user_id,list=>[attr_id=>num]]
     * 
     */
    public static function decreaseNumb($params) {
        $key = self::$key . $params['user_id'];
        $config = \Yii::$app->getComponents()['redis'];
        unset($config['class']);
        $redis = new Connection($config);
        foreach ($params['list'] as $attr_id => $num) {
            $cart_info = $redis->hget($key, self::$field . $attr_id);
            if ($cart_info) {
                $cart_info = json_decode($cart_info, true);
                $cart_num = $cart_info['num'] - $num;
                if ($cart_num <= 0) {
                    $redis->hdel($key, $attr_id);
                } else {
                    $cart_info['num'] = $cart_num;
                    $redis->hset($key, $attr_id, json_encode($cart_info));
                }
            }
        }
        $redis->close();
    }
}