package com.jadx.server.util;

import org.apache.commons.lang3.StringUtils;

import java.math.BigInteger;
import java.util.Random;

public final class IdWorker extends com.baomidou.mybatisplus.core.toolkit.IdWorker {

    private static final long EPOCH = 1479533469598L; //开始时间,固定一个小于当前时间的毫秒数
    private static final int max12bit = 4095;// 12位序列号,支持同一毫秒内同一个节点可以生成4096个ID
    private static final long max41bit = 1099511627775L;
    private static String machineId = "1101"; // 机器ID 二进制 1101 = 十进制 13

    /**
     * 创建ID
     */
    public static long getId() {

        long time = System.currentTimeMillis() - EPOCH + max41bit ;
        // 二进制的 毫秒级时间戳
        String base = Long.toBinaryString(time);
        // 序列数
        String randomStr = StringUtils.leftPad(Integer.toBinaryString(new Random().nextInt(max12bit)), 12, '0');
        if (StringUtils.isNotEmpty(machineId)) {
            machineId = StringUtils.leftPad(machineId, 10, '0');
        }
        //拼接
        String appendStr = base + machineId + randomStr;
        // 转化为十进制 返回
        BigInteger bi = new BigInteger(appendStr, 2);
        return Long.parseLong(bi.toString());
    }

    public static void main(String[] args) {
        for (int i = 0; i < 100; i++) {
            System.out.println(getId());
        }
    }

}