<?php

namespace app\integral\service;

use app\integral\model\IntegralProduct;

class Product extends Base
{
    /**
     * 判断库存是否充足
     * @param int $product_id 产品ID
     * @param int $product_sku 产品SKU
     * @param int $number 数量
     * @date 2022-11-15
     */
    public function isStockEnough($product_id, $sku = '', $number = 1)
    {
        $product_model = new IntegralProduct();

        // 获取商品详情
        $product = $product_model->getProduct([
            ['id', '=', $product_id]
        ],'id,stock,is_publish,is_spec_open');

        if (empty($product)) {
            return sendErrorArray(2001, '商品不存在');
        }

        if ($product['is_publish'] == 0) {
            return sendErrorArray(2002, '商品已下架');
        }

        // 开启规格时，没有SKU抛出异常
        if ($product['is_spec_open'] == 1) {
            if (empty($sku)) {
                return sendErrorArray(2003, 'sku参数错误');
            }
        }

        // 没有规格时，购买件数超过总库存
        if ($product['is_spec_open'] == 0) {
            if ($number > $product['stock']) {
                return sendErrorArray(2004, '商品加购件数(含已加购件数)超过库存');
            }
        } else {
            foreach ($product['integralProductSku'] as $k => $v) {
                if ($v['sku'] == $sku) {
                    if ($number > $v['stock']) {
                        return sendErrorArray(2005, '商品加购件数(含已加购件数)超过库存');
                    }
                }
            }
        }

        return sendSuccessArray();
    }

}