package com.zy.asrs.common.utils;

import com.zy.asrs.framework.common.Cools;

import java.security.SecureRandom;
import java.text.DecimalFormat;

/**
 * Created by vincent on 2020/8/27
 */
public class Utils {

    private static final DecimalFormat fmt = new DecimalFormat("##0.00");

    public static String zerofill(String msg, Integer count){
        if (msg.length() == count){
            return msg;
        } else if (msg.length() > count){
            return msg.substring(0, 16);
        } else {
            StringBuilder msgBuilder = new StringBuilder(msg);
            for (int i = 0; i<count-msg.length(); i++){
                msgBuilder.insert(0,"0");
            }
            return msgBuilder.toString();
        }
    }

    /**
     * 通过库位号获取 排
     */
    public static int getRow(String locNo) {
        if (!Cools.isEmpty(locNo)) {
            return Integer.parseInt(locNo.substring(0, 2));
        }
        throw new RuntimeException("库位解析异常");
    }

    /**
     * 通过库位号获取 列
     */
    public static int getBay(String locNo) {
        if (!Cools.isEmpty(locNo)) {
            return Integer.parseInt(locNo.substring(2, 5));
        }
        throw new RuntimeException("库位解析异常");
    }

    /**
     * 通过库位号获取 层
     */
    public static int getLev(String locNo) {
        if (!Cools.isEmpty(locNo)) {
            return Integer.parseInt(locNo.substring(5, 7));
        }
        throw new RuntimeException("库位解析异常");
    }

    /**
     * 生成随机字符串
     */
    public static String generateString(int length) {
        String characters = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; // 可选的字符集合
        SecureRandom random = new SecureRandom();
        StringBuilder sb = new StringBuilder(length);
        for (int i = 0; i < length; i++) {
            int index = random.nextInt(characters.length());
            char randomChar = characters.charAt(index);
            sb.append(randomChar);
        }
        return sb.toString();
    }

}