package com.zhujizheng.IHome.websocket.server;

import com.zhujizheng.IHome.websocket.Net.Base.NetProtocolBase;
import com.zhujizheng.IHome.websocket.Net.exception.NetException;
import lombok.extern.slf4j.Slf4j;
import net.sf.json.JSON;
import net.sf.json.JSONObject;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.stereotype.Component;

import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.io.IOException;
import java.util.concurrent.ConcurrentHashMap;

/**
 * Created with IntelliJ IDEA
 * <p>
 * Author: yons
 * Date: 2019/04/10
 * Time: 02:31
 * Description:
 * Copyright © 2019年 com.zhujizheng. All rights reserved.
 */

@Slf4j
@ServerEndpoint(value = "/websocket/{sid}")
@Component
public class WebSocketServer {

    /** 静态变量，用来记录当前在线连接数。应该把它设计成线程安全的。**/
    private static int onlineCount = 0;

    /** 线程安全Map，用来存放每个客户端对应的WebSocket对象。**/
    private static ConcurrentHashMap<String, WebSocketServer> webSocketMap = new ConcurrentHashMap<>();
    public static ConcurrentHashMap<String, WebSocketServer> getWebSocketMap() {
        return webSocketMap;
    }
    /** 与某个客户端的连接会话，需要通过它来给客户端发送数据 **/
    private Session session;
    public Session getSession() {
        return session;
    }
    /** 接收sid **/
    private String sid="";
    public String getSid() {
        return sid;
    }

    /**
     * 连接建立成功调用的方法*/
    @OnOpen
    public void onOpen(Session session, @PathParam("sid") String sid) {
        this.session = session;
        // 加入map中
        webSocketMap.remove(sid);
        webSocketMap.put(sid, this);
        // 在线数加1
        addOnlineCount();
        log.info("有新窗口开始监听:"+sid+",当前在线人数为" + getOnlineCount());
        this.sid = sid;
    }

    /**
     * 连接关闭调用的方法
     */
    @OnClose
    public void onClose() {
        // 从set中删除
        webSocketMap.remove(this.sid);
        // 在线数减1
        subOnlineCount();
        log.info("有一连接关闭！当前在线人数为" + getOnlineCount());
    }

    /**
     * 收到客户端消息后调用的方法
     *
     * @param message 客户端发送过来的消息*/
    @OnMessage
    public void onMessage(String message, Session session) {
        log.info("收到来自窗口" + sid + "的信息:" + message);
        String beat = "py_beat";
        if (beat.equals(message)) {
            session.getAsyncRemote().sendText(message);
            return;
        }
        NetProtocolBase.dealWithData(message, sid);
    }

    /**
     *
     * @param session
     * @param error
     */
    @OnError
    public void onError(Session session, Throwable error) {
        log.error("发生错误");
        error.printStackTrace();
    }
    /**
     * 实现服务器主动推送
     */
    public void sendString(String string) {
        System.out.println("服务器主动推送: " + string);
        try {
            this.session.getBasicRemote().sendText(string);
        } catch (IOException e) {
            e.printStackTrace();
            throw new NetException();
        }
    }

    public static Boolean sendString(String string, @PathParam("sid") String sid) {
        if (sid == null) {
            System.out.println("sid为空");
            return false;
        }
        log.info("推送消息到窗口"+sid+"，推送内容:"+string);
        WebSocketServer item = webSocketMap.get(sid);
        if (null == item) {
            return false;
        }
        item.sendString(string);
        return true;
    }

    /**
     * 群发自定义消息
     * */
    public void sendInfo(String string, @PathParam("sid") String sid) {
        log.info("推送消息到窗口"+sid+"，推送内容:"+string);
        for(String key : webSocketMap.keySet()){
            // 这里可以设定只推送给这个sid的，为null则全部推送
            if(sid == null) {
                WebSocketServer item = webSocketMap.get(key);
                item.sendString(string);
            }else if(key.equals(sid)){
                WebSocketServer item = webSocketMap.get(key);
                item.sendString(string);
            }
        }
    }

    private static synchronized int getOnlineCount() {
        return onlineCount;
    }
    private static synchronized void addOnlineCount() {
        WebSocketServer.onlineCount++;
    }
    private static synchronized void subOnlineCount() {
        WebSocketServer.onlineCount--;
    }
}