<?php

namespace App\Service\v3\Implementations;

use App\Service\v3\Interfaces\GoodsInventoryServiceInterface;
use Hyperf\Redis\Redis;
use Hyperf\Utils\ApplicationContext;

class GoodsInventoryService implements GoodsInventoryServiceInterface
{

    /**
     * @inheritDoc
     */
    public function doSold($activityType, $goodsId, $num)
    {
        $redis = ApplicationContext::getContainer()->get(Redis::class);
        $hName = 'goods:inventory_sold_' . $activityType;
        $hKey = 'goods_id_' . $goodsId;

        $redis->hIncrBy($hName, $hKey, $num);
    }

    /**
     * @inheritDoc
     */
    public function undoSold($activityType, $goodsId, $num)
    {
        $redis = ApplicationContext::getContainer()->get(Redis::class);
        $hName = 'goods:inventory_sold_' . $activityType;
        $hKey = 'goods_id_' . $goodsId;

        $redis->hIncrBy($hName, $hKey, -1*$num);
    }

    /**
     * @inheritDoc
     */
    public function getSold($activityType, $goodsId)
    {
        $redis = ApplicationContext::getContainer()->get(Redis::class);
        $hName = 'goods:inventory_sold_' . $activityType;
        $hKey = 'goods_id_' . $goodsId;

        return $redis->hGet($hName, $hKey);
    }
}