package com.ruoyi.framework.websocket;

import com.alibaba.fastjson2.JSON;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

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

import static jdk.nashorn.internal.runtime.regexp.joni.Config.log;

/**
 * websocket 消息处理
 *
 * @author ruoyi
 */

@Component
@ServerEndpoint("/websocket/message")
public class WebSocketServer
{
    /**
     * WebSocketServer 日志控制器
     */
    private static final Logger LOGGER = LoggerFactory.getLogger(WebSocketServer.class);

    /**
     * 默认最多允许同时在线人数100
     */
    public static int socketMaxOnlineCount = 100;

    private static Semaphore socketSemaphore = new Semaphore(socketMaxOnlineCount);

    /**
     * 连接建立成功调用的方法
     */
    @OnOpen
    public void onOpen(Session session) throws Exception
    {
        boolean semaphoreFlag = false;
        // 尝试获取信号量
        semaphoreFlag = SemaphoreUtils.tryAcquire(socketSemaphore);
        if (!semaphoreFlag)
        {
            // 未获取到信号量
            LOGGER.error("\n 当前在线人数超过限制数- {}", socketMaxOnlineCount);
            WebSocketUsers.sendMessageToUserByText(session, "当前在线人数超过限制数：" + socketMaxOnlineCount);
            session.close();
        }
        else
        {
            // 添加用户
            WebSocketUsers.put(session.getId(), session);
            LOGGER.info("\n 建立连接 - {}", session);
            LOGGER.info("\n 当前人数 - {}", WebSocketUsers.getUsers().size());
            WebSocketUsers.sendMessageToUserByText(session, "连接成功");
        }
    }

    /**
     * 连接关闭时处理
     */
    @OnClose
    public void onClose(Session session)
    {
        LOGGER.info("\n 关闭连接 - {}", session);
        Set<String> strings = configPageSession.keySet();
        if(strings.size()>0){
            for (String string : strings) {
                List<Session> sessions = configPageSession.get(string);
                Iterator<Session> iterator = sessions.iterator();
                while (iterator.hasNext()){
                    Session next = iterator.next();
                    if(next.equals(session)){
                        iterator.remove();
                    }
                }
            }
        }
        // 移除用户
        WebSocketUsers.remove(session.getId());
        // 获取到信号量则需释放
        SemaphoreUtils.release(socketSemaphore);
    }

    /**
     * 抛出异常时处理
     */
    @OnError
    public void onError(Session session, Throwable exception) throws Exception
    {
        if (session.isOpen())
        {
            // 关闭连接
            session.close();
        }
        String sessionId = session.getId();
        LOGGER.info("\n 连接异常 - {}", sessionId);
        LOGGER.info("\n 异常信息 - {}", exception);
        // 移出用户
        WebSocketUsers.remove(sessionId);
        // 获取到信号量则需释放
        SemaphoreUtils.release(socketSemaphore);
    }

    private static List<Session> mainPageSession = new ArrayList<>();
    private static Map<String,List<Session>> configPageSession = new HashMap<>();//key: 摄像头id，value:session
    /**
     * 服务器接收到客户端消息时调用的方法
     */
    @OnMessage
    public void onMessage(String message, Session session)
    {
        if (message.startsWith("main")) {

                mainPageSession.add(session);

        }

        if (message.startsWith("config")) {
            String[] configs = message.split(":");
            if (configs.length == 2) {
                List<Session> sessions = configPageSession.get(configs[1]);
                if (sessions == null) {
                    sessions = new ArrayList<>();
                }
                sessions.add(session);
                configPageSession.put(configs[1], sessions);
            }
        }
        String msg = message.replace("你", "我").replace("吗", "");
        WebSocketUsers.sendMessageToUserByText(session, msg);
    }



    public static synchronized void sendPicMessage(String message, String topicId) throws EncodeException, IOException {
//        LOGGER.info("main方法启动参数topicId{}",topicId);
        if(mainPageSession.size()>0){
            Iterator<Session> mainIterator = mainPageSession.iterator();
            while(mainIterator.hasNext()){
                Session session = mainIterator.next();
                if (session != null && session.isOpen()) {
                   /* WebsocketObiect websocketObiect=new WebsocketObiect();
                    websocketObiect.setMessage(message);
                    websocketObiect.setTopicId(topicId);
                    session.getBasicRemote().sendText(JSON.toJSONString(websocketObiect));*/
//                    System.out.println("websocketmain成功发送");
                } else {
                    mainIterator.remove();
                }
            }
        }

//        LOGGER.info("config方法启动参数topicId{}",topicId);
        if (topicId != null) {
            List<Session> sessions = configPageSession.get(topicId);
            if(sessions!=null&&sessions.size()>0){
                Iterator<Session> iterator = sessions.iterator();
                while(iterator.hasNext()){
                    Session session = iterator.next();
                    if (session != null && session.isOpen()) {
                        session.getBasicRemote().sendText(message);
//                    System.out.println("websocketconfig成功发送");
                    } else {
                        iterator.remove();
                    }
                }
            }


        }
    }
}