package com.nuvole.util;

import cn.hutool.core.convert.Convert;
import cn.hutool.core.util.NumberUtil;
import org.apache.commons.lang.StringUtils;

import java.util.HashMap;
import java.util.Map;

/**
 * @ClassName DiscountUtil
 * @Author cy
 * @Date 2023/5/25
 * @Description
 * @Version 1.0
 **/
public class DiscountUtil {
    /**
     * @param totalMoney 总金额
     * @param discount   折扣
     * @return
     */
    public static Map<String, Long> getDiscount(long totalMoney, String discount) {
        if (StringUtils.isBlank(discount)) {
            return null;
        }
        HashMap<String, Long> map = new HashMap<>();
        if ("10".equals(discount)) {
            map.put("disCountMoney", 0l);
            map.put("payMoney", totalMoney);
            return map;
        }
        Double disc = NumberUtil.div(Convert.toDouble(discount), Convert.toDouble(10));   //折扣
        //折扣优惠后应付金额
        Long payMoney = Convert.toLong(Math.ceil(NumberUtil.mul(Convert.toDouble(totalMoney), disc)));  // 打折后金额（向上取整）

        // 优惠金额
        Long disCountMoney = 0l;
        if (Convert.toDouble(totalMoney) >= payMoney) {
            disCountMoney = totalMoney - payMoney;
        } else {
            disCountMoney = totalMoney;
            payMoney = 0L;
        }
//        map.put("totalMoney", totalMoney);
        map.put("disCountMoney", disCountMoney);
        map.put("payMoney", payMoney);
        return map;
    }

}