/*
 * Copyright [2020-2030] [https://www.stylefeng.cn]
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Guns采用APACHE LICENSE 2.0开源协议，您在使用过程中，需要注意以下几点：
 *
 * 1.请不要删除和修改根目录下的LICENSE文件。
 * 2.请不要删除和修改Guns源码头部的版权声明。
 * 3.请保留源码和相关描述文件的项目出处，作者声明等。
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 * 5.在修改包名，模块名称，项目代码等时，请注明软件出处 https://gitee.com/stylefeng/guns
 * 6.若您的项目无法满足以上几点，可申请商业授权
 */
package cn.stylefeng.roses.kernel.monitor.api.pojo;

import cn.hutool.core.date.DateUnit;
import cn.hutool.core.date.DateUtil;
import cn.hutool.core.util.NumberUtil;
import lombok.Setter;

import java.lang.management.ManagementFactory;
import java.util.Date;

/**
 * JVM相关信息
 *
 * @author fengshuonan
 * @since 2019-07-13 13:42
 */
@Setter
public class JvmInfo {

    /**
     * 当前JVM占用的内存总数(M)
     */
    private double total;

    /**
     * JVM最大可用内存总数(M)
     */
    private double max;

    /**
     * JVM空闲内存(M)
     */
    private double free;

    /**
     * JDK版本
     */
    private String version;

    /**
     * JDK路径
     */
    private String home;

    public double getTotal() {
        return NumberUtil.div(total, (1024 * 1024), 2);
    }

    public double getMax() {
        return NumberUtil.div(max, (1024 * 1024), 2);
    }

    public double getFree() {
        return NumberUtil.div(free, (1024 * 1024), 2);
    }

    public double getUsed() {
        return NumberUtil.div(total - free, (1024 * 1024), 2);
    }

    public String getVersion() {
        return version;
    }

    public String getHome() {
        return home;
    }

    public double getUsage() {
        return NumberUtil.mul(NumberUtil.div(total - free, total, 4), 100);
    }

    /**
     * 获取JDK名称
     */
    public String getName() {
        return ManagementFactory.getRuntimeMXBean().getVmName();
    }

    /**
     * JDK启动时间
     */
    public String getStartTime() {
        long time = ManagementFactory.getRuntimeMXBean().getStartTime();
        Date date = new Date(time);
        return DateUtil.formatDateTime(date);
    }

    /**
     * JDK运行时间
     */
    public String getRunTime() {

        long time = ManagementFactory.getRuntimeMXBean().getStartTime();
        Date date = new Date(time);

        //运行多少分钟
        long runMS = DateUtil.between(date, new Date(), DateUnit.MS);

        long nd = 1000 * 24 * 60 * 60;
        long nh = 1000 * 60 * 60;
        long nm = 1000 * 60;

        long day = runMS / nd;
        long hour = runMS % nd / nh;
        long min = runMS % nd % nh / nm;

        return day + "天" + hour + "小时" + min + "分钟";
    }
}
