package com.dy.rtuMw.server.mqtt;

import com.dy.common.mw.channel.mqtt.MqttClientPool;
import com.dy.common.mw.protocol4Mqtt.MqttNotify;
import com.dy.common.mw.protocol4Mqtt.MqttNotifyInfo;
import com.dy.common.mw.protocol4Mqtt.status.DevOnLineInfo;
import com.dy.common.mw.protocol4Mqtt.status.DevRunInfo;
import com.dy.rtuMw.server.ServerProperties;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.eclipse.paho.client.mqttv3.MqttClient;

import java.util.ArrayList;
import java.util.List;

/**
 * @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 List<MqttClient> subClients ;

    private MqttManager(){
    }

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

    /**
     * 创建连接池 + 订阅主题
     * @throws Exception
     */
    public void start()throws Exception{
        subClients = new ArrayList<>();
        String URL = "tcp://" + this.configVo.svIp + ":" + this.configVo.svPort;
        this.pool = new MqttClientPool(URL, this.configVo.svUserName, this.configVo.svUserPassword, this.configVo.poolMaxSize, this.configVo.useMemoryPersistence);
        if(this.pool.isClose()){
            throw new Exception("Mqtt连接池初始化失败");
        }
        MqttClient clientSub ;
        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");
        }
        subClients.add(clientSub) ;
        // 订阅主题
        for(int i = 0; i < this.configVo.subTopics.length; i++){
            for(int j = 0 ; j < this.configVo.protocolAndDeviceIds.length; j++){
                clientSub.subscribe(ServerProperties.orgTag + "/"
                        + this.configVo.protocolAndDeviceIds[j] + "/"
                        + this.configVo.subTopics[i],
                        this.configVo.subTopicsQos[i],
                        //每一个订阅主题都有一个MqttMessageListener实例
                        new MqttMessageListener(new MqttNotify(){
                            @Override
                            public void notify(String devId, MqttNotifyInfo... infos) {
                                if(devId != null && infos != null && infos.length > 0){
                                    for(MqttNotifyInfo info : infos){
                                        if(info instanceof DevOnLineInfo){
                                            DevOnLineInfo onLineSt = (DevOnLineInfo)info;
                                            if(onLineSt.onLine != null && onLineSt.onLine.booleanValue()){
                                                DevStatusDealer.onLine(devId, ((DevOnLineInfo)info).protocol);
                                            }else{
                                                DevStatusDealer.offLine(devId);
                                            }
                                        } else if(info instanceof DevRunInfo){
                                            DevStatusDealer.setStatus(devId, (DevRunInfo)info);
                                        }
                                    }
                                }
                            }
                        })
                );
            }
        }
    }

    public void stop()throws Exception{
        if(subClients != null && subClients.size() > 0){
            for (MqttClient client : subClients) {
                if(client != null && client.isConnected()){
                    try{
                        client.disconnect();
                        client.close();
                    }catch (Exception e){
                        e.printStackTrace();
                    }
                }
            }
        }
        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.pubTopicQos, false);
    }

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

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