package com.dy.rtuMw.server.mqtt;

import com.dy.common.mw.channel.mqtt.MqttClientPool;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.eclipse.paho.client.mqttv3.MqttClient;

/**
 * @Author: liurunyu
 * @Date: 2025/6/4 14:54
 * @Description
 */
public class MqttManager {

    private static final Logger log = LogManager.getLogger(MqttManager.class.getName());

    private static final MqttManager INSTANCE = new MqttManager();

    private MqttUnitConfigVo configVo ;

    private MqttClientPool pool;

    private MqttManager(){
    }

    public static MqttManager getInstance() {
        return MqttManager.INSTANCE;
    }
    /**
     *  初始化配置信息
     */
    public void initOption(MqttUnitConfigVo configVo) {
        this.configVo = configVo;
    }

    public void start()throws Exception{
        String URL = "tcp://" + this.configVo.svIp + ":" + this.configVo.svPort;
        this.pool = new MqttClientPool(URL, this.configVo.svUserName, this.configVo.svUserPassword, this.configVo.poolMaxSize);
        if(this.pool.isClose()){
            throw new Exception("Mqtt连接池初始化失败");
        }
        MqttClient clientSub = null ;
        try {
            clientSub = pool.popClient();//新创建一个Client时，此Client实际去连接MQTT服务器，如果连接不上，就会抛出异常
        }catch (Exception e){
            throw new Exception("Mqtt连接池获得连接异常", e);
        }
        if(clientSub == null || !clientSub.isConnected()){
            throw new Exception("Mqtt连接池获得订阅连接不可用");
        }
        for(int i = 0; i < this.configVo.subTopics.length; i++){
            clientSub.subscribe(this.configVo.subTopics[i], this.configVo.topicsQos[i], new MqttMessageListener());
        }
    }

    public void stop()throws Exception{
        if(this.pool != null){
            // 关闭连接池
            this.pool.close();
        }
    }

    public MqttClient popMqttClient() throws Exception{
        return this.pool.popClient();
    }

    public void pushMqttClient(MqttClient client) {
        this.pool.pushClient(client);
    }

    public void publishMsg(MqttClient client, String topic, byte[] msg) throws Exception{
        client.publish(topic, msg, this.configVo.publishQos, false);
    }

    public void publishMsg(MqttClient client, String topic, String msg) throws Exception{
        byte[] bs = msg.getBytes("UTF-8") ;
        client.publish(topic, bs, this.configVo.publishQos, false);
    }

    public boolean poolIsClose(){
        if(this.pool == null){
            return true;
        }
        return this.pool.isClose();
    }
}