package com.mes.tools;

import cn.hutool.json.JSONObject;
import cn.hutool.json.JSONUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.stereotype.Component;

import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

@ServerEndpoint(value = "/api/talk/{username}")
@Component("webSocketServer")
public class WebSocketServer {

    // @Autowired
    // HomeMapper homeMapper;

    public static ConfigurableApplicationContext applicationContext;

    // 解决无法注入mapper问题 //使用方法
    // homeMapper=WebSocketServer.applicationContext.getBean(HomeMapper.class);
    public static void setApplicationContext(ConfigurableApplicationContext configurableApplicationContext) {
        WebSocketServer.applicationContext = configurableApplicationContext;
    }

    private static final Logger log = LoggerFactory.getLogger(WebSocketServer.class);
    private List<String> messages;
    /**
     * 记录当前在线连接数
     */
    public static final Map<String, ArrayList<WebSocketServer>> sessionMap = new ConcurrentHashMap<>();

    String username;
    Session session;

    public WebSocketServer() {
        this.messages = new ArrayList<>();
    }

    /**
     * 连接建立成功调用的方法
     */
    @OnOpen
    public void onOpen(Session session, @PathParam("username") String username) {
        this.username = username;
        this.session = session;
        List<WebSocketServer> webSocketServers = sessionMap.get(username);
        if (webSocketServers == null) {
            ArrayList<WebSocketServer> arrayListwebserver = new ArrayList<WebSocketServer>();
            arrayListwebserver.add(this);
            sessionMap.put(username, arrayListwebserver);
        } else {
            webSocketServers.add(this);
        }

        log.info("有新用户加入，username={}, 当前在线人数为：{}", username, sessionMap.get(username).size());

        // JSONObject result = new JSONObject();
        // JSONArray array = new JSONArray();
        // result.set("users", array);
        // for (Object key : sessionMap.keySet()) {
        // JSONObject jsonObject = new JSONObject();
        // jsonObject.set("username", key);
        // array.add(jsonObject);
        // }

        // sendAllMessage(JSONUtil.toJsonStr(result)); // 后台发送消息给所有的客户端
    }

    /**
     * 连接关闭调用的方法
     */
    @OnClose
    public void onClose(Session session, @PathParam("username") String username) {
        List<WebSocketServer> webSocketServers = sessionMap.get(username);
        ArrayList<WebSocketServer> arrayListwebserver = new ArrayList<WebSocketServer>();
        if (webSocketServers.size() > 1) {
            for (WebSocketServer webSocketServer : webSocketServers) {
                if (webSocketServer != this) {
                    arrayListwebserver.add(webSocketServer);
                }
            }
            sessionMap.put(username, arrayListwebserver);
            log.info("移除username={}一名用户session, {}的当前在线人数为：{}", username, username, sessionMap.get(username).size());
        } else {
            sessionMap.remove(username);
            log.info("移除username={}一名用户session, {}连接关闭, 当前连接数为：{}", username, username, sessionMap.size());
        }

    }

    /**
     * 收到客户端消息后调用的方法
     * 后台收到客户端发送过来的消息
     * onMessage 是一个消息的中转站
     * 接受 浏览器端 socket.send 发送过来的 json数据
     *
     * @param message 客户端发送过来的消息
     */
    @OnMessage
    public void onMessage(String message, Session session, @PathParam("username") String username) {
        log.info("服务端收到用户username={}的消息:{}", username, message);
        JSONObject obj = JSONUtil.parseObj(message);
        String text = obj.getStr("data");

        JSONObject jsonObject = new JSONObject();
        jsonObject.set("message", text);
        this.messages.add(text);
        this.sendMessage(jsonObject.toString()); // JSONUtil.toJsonStr(jsonObject)

    }

    @OnError
    public void onError(Session session, Throwable error) {
        log.error("发生错误");
        error.printStackTrace();
    }

    /**
     * 服务端发送消息给客户端
     */
    public void sendMessage(String message) {
        try {
            // log.info("服务端给客户端[{}]发送消息{}", this.session.getId(), message);
            this.session.getBasicRemote().sendText(message);
        } catch (Exception e) {
            log.error("服务端发送消息给客户端失败", e);
        }
    }

    // /**
    //  * 服务端发送消息给所有客户端
    //  */
    // public void sendAllMessage(String message) {
    //     try {
    //         for (WebSocketServer webSocketServer : sessionMap.values()) {
    //             // log.info("服务端给客户端[{}]发送消息{}", this.session.getId(), message);
    //             webSocketServer.sendMessage(message);
    //         }
    //     } catch (Exception e) {
    //         log.error("服务端发送消息给客户端失败", e);
    //     }
    // }

    public List<String> getMessages() {
        return messages;

    }

    public void clearMessages() {
        messages.clear();
    }


}