package com.iplatform.tcp.lb;

import com.iplatform.base.Constants;
import com.iplatform.tcp.util.ws.LoginResponse;
import com.iplatform.tcp.util.ws.WebDataResponse;
import com.walker.infrastructure.utils.JsonUtils;
import com.walker.push.rocketmq.EnhanceMessageHandler;
import com.walker.push.rocketmq.tcp.MqResponse;
import com.walker.tcp.Connection;
import com.walker.tcp.ConnectionManager;
import com.walker.tcp.Response;
import com.walker.tcp.lb.LongConnectionMeta;
import org.apache.rocketmq.spring.core.RocketMQListener;

import java.util.Map;

/**
 * 平台默认的MQ队列监听器，业务需要根据情况继承该对象，实现自己的业务。
 * <p>需要重写方法：{@linkplain DefaultMqListener#handleMessage(MqResponse)}</p>
 * @author 时克英
 * @date 2023-09-26
 * @date 2024-01-23 无需使用集群模式，单机即可，MQ不用开启监听。
 */
//@RocketMQMessageListener(topic = "${iplatform.tcp.connection-host}", consumerGroup = "consumer-group")
//public class DefaultMqListener extends EnhanceMessageHandler<MqResponse> implements RocketMQListener<MqResponse> {
public class DefaultMqListener extends EnhanceMessageHandler<MqResponse> implements RocketMQListener<MqResponse> {

//    protected final transient Logger logger = LoggerFactory.getLogger(this.getClass());

    @Override
    public void onMessage(MqResponse mqResponse) {
        this.dispatchMessage(mqResponse);
    }

    @Override
    protected void handleMessage(MqResponse message) throws Exception {
        // 具体执行业务消息方法。
        // 这里聊天业务中，需要推送到本机连接的客户端（或浏览器）
//        Response<?> response = message.getResponse();
        Response<?> response = this.translateResponse(message.getResponse());
        Connection conn = connectionManager.getConnectionByName(response.getName());
        if(conn == null || !conn.isConnected()){
            logger.debug("mq消息已接收，但长连接不存在无法推送，response = {}", response);
            return;
        }

        if(conn instanceof LongConnectionMeta){
            throw new IllegalStateException("这个应该是本地物理连接，但找到的是：LongConnectionMeta，name=" + response.getName());
        }
        conn.write(response);
    }

    /**
     * 转换成实际发送的业务数据，业务可以继承该类，并重写方法。
     * @param json
     * @return
     * @throws Exception
     */
    protected Response<?> translateResponse(String json) throws Exception{
        Map<String, Object> responseMap = JsonUtils.jsonStringToObject(json, Map.class);
        if(!responseMap.containsKey(KEY_PROTOCOL_NUM)){
            throw new IllegalArgumentException("responseMap中必须包含协议号字段:" + KEY_PROTOCOL_NUM);
        }
        String protocolNum = responseMap.get(KEY_PROTOCOL_NUM).toString();
        if(protocolNum.equals("login")){
            return JsonUtils.jsonStringToObject(json, LoginResponse.class);
        } else if(protocolNum.equals(Constants.PUSH_SCOPE_DATA)){
            return JsonUtils.jsonStringToObject(json, WebDataResponse.class);
        } else {
            throw new UnsupportedOperationException("未实现的 websocket.response对象转换：" + json);
        }
    }

    private final String KEY_PROTOCOL_NUM = "protocolNum";

    @Override
    protected void handleMaxRetriesExceeded(MqResponse message) {

    }

    @Override
    protected boolean isRetry() {
        return false;
    }

    @Override
    protected boolean throwException() {
        return true;
    }

    public void setConnectionManager(ConnectionManager connectionManager) {
        this.connectionManager = connectionManager;
    }

    private ConnectionManager connectionManager;
}