package com.boying.controller.car;

import org.eclipse.paho.client.mqttv3.*;
import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;

/**
 * @author kdq
 * @version 1.0.0
 * @ClassName ServerMQTT.java
 * @Description TODO
 * @createTime 2024年03月20日 15:43:00
 */
public class ServerMQTT {

    public static void main(String[] args) throws MqttException {
        ServerMQTT server = new ServerMQTT();

        server.message = new MqttMessage();
        server.message.setQos(2);
        server.message.setRetained(true);
        server.message.setPayload("ServerMQTT".getBytes());
        server.publish(server.topic , server.message);
        System.out.println(server.message.isRetained() + "------ratained状态");
    }

    //MQTT安装的服务器地址和端口号
    public static final String HOST = "tcp://39.96.92.240:9092";
    //定义一个主题
    public static final String TOPIC = "/device/message/up/ivs_result";
    //定义MQTT的ID，可以在MQTT服务配置中指定
    private static final String clientid = "client-1";

    private MqttClient client;
    private MqttTopic topic;
    private String userName = "mqtt";
    private String passWord = "mqtt";
    private MqttMessage message;

    /**
     * g构造函数
     */
    public ServerMQTT() throws MqttException {
        // MemoryPersistence设置clientid的保存形式，默认为以内存保存
        client = new MqttClient(HOST, clientid, new MemoryPersistence());
        connect();
    }

    /**
     * l连接服务器
     */
    private void connect() {
        MqttConnectOptions options = new MqttConnectOptions();
        options.setCleanSession(false);
        options.setUserName(userName);
        options.setPassword(passWord.toCharArray());
        // 设置超时时间
        options.setConnectionTimeout(10);
        // 设置会话心跳时间
        options.setKeepAliveInterval(20);
        try {
            client.setCallback(new MqttCallback() {
                @Override
                public void connectionLost(Throwable cause) {
                    // 连接丢失后，一般在这里面进行重连
                    System.out.println("连接断开……（可以做重连）");
                }
                @Override
                public void deliveryComplete(IMqttDeliveryToken token) {
                    System.out.println("deliveryComplete---------" + token.isComplete());
                }
                @Override
                public void messageArrived(String topic, MqttMessage message) throws Exception {
                    // subscribe后得到的消息会执行到这里面
                    System.out.println("接收消息主题:" + topic + "  接收消息Qos:" + message.getQos() + "接收消息内容:" + new String(message.getPayload()));
                }
            });
            client.connect(options);

            topic = client.getTopic(TOPIC);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * t推送消息
     */
    public void publish(MqttTopic topic , MqttMessage message) throws MqttPersistenceException, MqttException {
        MqttDeliveryToken token = topic.publish(message);
        token.waitForCompletion();
        System.out.println("message is published completely! " + token.isComplete());
    }
}