package com.supervision.controller;

import com.supervision.constant.UserTokenConstant;
import com.supervision.websocket.UserResourceCheck;
import com.supervision.websocket.WebSocketSessionPool;
import com.supervision.websocket.dto.WebSocketLoginDTO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;

import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;

@Component
@Slf4j
@ServerEndpoint("/webSocket/{uuid}/{userId}")
public class WebSocketServer {

    private static RedisTemplate<String, String> redisTemplate;

    private static UserResourceCheck userResourceCheck;

    // 因为是ServerEndpoint是多例,所以需要这样注入
    @Autowired
    public void setUserResourceCheck(UserResourceCheck userResourceCheck) {
        WebSocketServer.userResourceCheck = userResourceCheck;
    }

    // 因为是ServerEndpoint是多例,所以需要这样注入
    @Autowired
    public void setRedisTemplate(RedisTemplate<String, String> redisTemplate) {
        WebSocketServer.redisTemplate = redisTemplate;
    }

    /**
     * 有客户端连接成功
     */
    @OnOpen
    public void onOpen(Session session, @PathParam(value = "uuid") String uuid, @PathParam(value = "userId") String userId) {
        // 校验资源数量,并保存
        userResourceCheck.achieveDiagnoseResourceAndOpenConnection(uuid, userId, session);
        WebSocketSessionPool.SESSION_POOL.put(uuid, session);
        log.info("用户:{},UUID:{}登录成功", userId, uuid);
    }

    /**
     * 连接关闭调用的方法
     */
    @OnClose
    public void onClose(Session session, @PathParam(value = "uuid") String uuid, @PathParam(value = "userId") String userId) {
        redisTemplate.opsForHash().delete(UserTokenConstant.USER_WEBSOCKET_CACHE, uuid);
        WebSocketSessionPool.SESSION_POOL.remove(uuid);
        log.info("用户:{},uuid:{}关闭，从Redis中移除,当前连接数为：{}", userId, uuid, redisTemplate.opsForHash().size(UserTokenConstant.USER_WEBSOCKET_CACHE));
    }

    /**
     * 发生错误
     */
    @OnError
    public void onError(Session session, @PathParam(value = "uuid") String uuid, @PathParam(value = "userId") String userId, Throwable throwable) {
        redisTemplate.opsForHash().delete(UserTokenConstant.USER_WEBSOCKET_CACHE, uuid);
        WebSocketSessionPool.SESSION_POOL.remove(uuid);
        log.error("用户:{},uuid:{}发生错误，从Redis中移除,当前连接数为：{}", userId, uuid, redisTemplate.opsForHash().size(UserTokenConstant.USER_WEBSOCKET_CACHE), throwable);
    }


}