//初始化聊天室
this.joinRoom = function(userId,nickName, avatar, roomID) {
        //初始化当前用户
        this.currentUser = new User(userId, nickName, avatar);
        //初始化当前聊天室id
        this.currentRoomId = roomID;
        //初始化goeasy，建立长连接
        this.goeasy = new GoEasy({
            host: "hangzhou.goeasy.io",
            appkey: "您的appkey",
            userId: this.currentUser.id,
            userData: '{"nickname":"' + this.currentUser.nickname + '","avatar":"' + this.currentUser.avatar + '"}',
            onConnected: function () {
                console.log( "GoEasy connect successfully.")
            },
            onDisconnected: function () {
                console.log("GoEasy disconnected.")
            }
        });
        //查询当前在线用户列表，初始化onlineUsers对象
        this.initialOnlineUsers();
        //监听用户上下线提醒，实时更新onlineUsers对象
        this.subscriberPresence();
        //监听和接收新消息
        this.subscriberNewMessage();
};

//页面切换到聊天室界面
function showChatRoom() {
    //更新房间名
    $("#chatRoom-header").find(".current-chatRoom-name").text(loginCommand.roomName);
    //加载聊天历史
    var chatHistory = service.loadChatHistory();
    chatHistory.forEach(function (item) {
        //展示发送的消息
        var otherPerson = createCurrentChatRoomPerson(item.senderNickname + ":", item.content)
        $(".chatRoom-content-box").append($(otherPerson));
    });
    //隐藏登录界面
    $(".chat-login-box").hide();
    // //显示聊天界面
    $(".chatRoom-box").show();
    // //滑动到最后一行
    scrollBottom();
}

//监听用户上下线时间，维护onlineUsers对象
this.subscriberPresence = function() {
    var self = this;
    this.goeasy.subscribePresence({
        channel: this.currentRoomId,
        onPresence: function(presenceEvents) {
            presenceEvents.events.forEach(function(event) {
                var userId = event.userId;
                var count = presenceEvents.clientAmount;
                //更新onlineUsers在线用户数
                self.onlineUsers.count = count;
                //如果有用户进入聊天室
                if (event.action == "join" || event.action == "online") {
                    var userData = JSON.parse(event.userData);
                    var nickName = userData.nickname;
                    var avatar = userData.avatar;
                    var user = new User(userId, nickName, avatar);
                    //将新用户加入onlineUsers列表
                    self.onlineUsers.users.push(user);
                    //触发界面的更新
                    self.onJoinRoom(user.nickname, user.avatar);
                } else {
                    for (var i = 0; i < self.onlineUsers.users.length; i++) {
                        var leavingUser = self.onlineUsers.users[i];
                        if (leavingUser.id == userId) {
                            var nickName = leavingUser.nickname;
                            var avatar = leavingUser.avatar;
                            //将离开的用户从onlineUsers中删掉
                            self.onlineUsers.users.splice(i, 1);
                            //触发界面的更新
                            self.onLeaveRoom(nickName, avatar);
                        }
                    }
                }
            });
        },
        onSuccess : function () {
            console.log("监听成功")
        },
        onFailed : function () {
            console.log("监听失败")
        }
    });
};

this.sendMessage = function(content) {
    var message = new ChatMessage(this.currentUser.id,this.currentUser.nickname, MessageType.CHAT, content);
    var self = this;
    this.goeasy.publish({
        channel: self.currentRoomId,
        message: JSON.stringify(message),
        onSuccess: function() {
            console.log("消息发布成功。");
        },
        onFailed: function(error) {
            console.log("消息发送失败，错误编码：" + error.code + " 错误信息：" + error.content);
        }
    });
};

//监听消息或道具
this.subscriberNewMessage = function() {
    var self = this;
    this.goeasy.subscribe({
        channel: this.currentRoomId, //替换为您自己的channel
        onMessage: function(message) {
            var chatMessage = JSON.parse(message.content);
            //todo:事实上不推荐在前端收到时保存, 一个用户开多个窗口，会导致重复保存, 建议所有消息都是都在发送时在服务器端保存，这里只是为了演示
            self.restapi.saveChatMessage(self.currentRoomId, chatMessage);
            //如果收到的是一个消息，就显示为消息
            if (chatMessage.type == MessageType.CHAT) {
                var selfSent = chatMessage.senderUserId == self.currentUser.id;
                var content = JSON.parse(message.content);
                self.onNewMessage(chatMessage.senderNickname, content, selfSent);
            }
            //如果收到的是一个道具，就播放道具动画
            if (chatMessage.type == MessageType.PROP) {
                if (chatMessage.content == Prop.ROCKET) {
                    self.onNewRocket(chatMessage.senderNickname);
                }
                if (chatMessage.content == Prop.HEART) {
                    self.onNewHeart(chatMessage.senderNickname);
                }
            }
        }
    });
};

this.sendProp = function(prop) {
    var self = this;
    var message = new ChatMessage(this.currentUser.id,this.currentUser.nickname, MessageType.PROP, prop);
    this.goeasy.publish({
        channel: self.currentRoomId,
        message: JSON.stringify(message),
        onSuccess: function() {
            console.log("道具发布成功。");
        },
        onFailed: function(error) {
            console.log("道具发送失败，错误编码：" + error.code + " 错误信息：" + error.content);
        }
    });
};