import { getToken } from '@/utils/auth';
import { checkLoginLine } from '@/api/login';
import { getBaseUrl } from '@/utils/baseUrl';
import { MessageBox } from 'element-ui';
import store from '@/store/index';
import Stomp from 'stompjs';

const isDev = process.env.NODE_ENV === 'development';
const isTest = process.env.NODE_ENV === 'test';
const websocketUrl = `${getBaseUrl()}/joylink-websocket?token=`;
const reconnectInterval = [1000, 3000, 5000, 10000, 30000, 60000];

var StompClient = function (headers) {
    this.url = websocketUrl + getToken();
    this.headers = headers || {};
    this.subscribeMap = new Map(); // 已订阅，对象{dest:'', handler:function, sub: Object}
    this.connect();
};

StompClient.prototype = {
    websocket: null,
    clientIns: null,
    url: '',
    status: false,
    sockStatus: 0,
    headers: {
        // 'X-Token': getToken()
    },
    isPassived:true, // 是否被动断线重连
    count: 0,
    topic: '',
    onmessage: null,

    // 连接服务端
    connect() {
        // 向服务器发起websocket连接并发送CONNECT帧
        this.websocket = new WebSocket(this.url.replace(/https/, 'wss').replace(/http/, 'ws'));
        // 获取 STOMP 子协议的客户端对象
        this.clientIns = Stomp.over(this.websocket);
        this.closeStompDebug();
        const that = this;
        this.clientIns.connect({ 'X-Token': getToken() }, () => {
            console.info('连接成功.');
            that.count = 0;
            that.status = true;
            // 恢复订阅
            that.subscribeMap.forEach((subscribe) => {
                that.subscribe(subscribe.dest, subscribe.handler);
            });
        }, (e)=> {
            console.log('socket连接错误:' + e);
            this.status = false;
        });
        // sock断开回调
        that.clientIns.ws.onclose = () => {
            that.status = false;
            console.info(`通信连接已断开！`);
            checkLoginLine().then((resp) => {
                if (resp.code == 200) {
                    that.count++;
                    that.reconnect(that.count);
                }
            }).catch((err) => {
                that.logOut(err);
            });
        };
    },
    logOut(err) {
        console.info(err);
        // 退出登陆前断开连接
        store.dispatch('disconnect').then(()=>{
            MessageBox.confirm('你已被登出，请重新登录', '确定登出', {
                confirmButtonText: '重新登录',
                showCancelButton: false,
                type: 'warning'
            }).then(() => {
                store.dispatch('FedLogOut').then(() => {
                    location.reload();// 为了重新实例化vue-router对象 避免bug
                });
            });
        });
    },
    // 恢复链接
    reconnect(count) {
        console.info(`尝试第${count || 1}次连接.`);
        // Message.warning(`正在尝试第${count || 1}次通讯连接。`);
        const that = this;
        if (this.clientIns) { // 初始化stomp和websocket
            if (this.clientIns.connected) {
                this.clientIns.disconnect();
            }
            this.websocket.close();
            this.websocket = null;
            this.clientIns = null;
        }
        setTimeout(() => {
            that.connect();
        }, reconnectInterval[that.count] || reconnectInterval[reconnectInterval.length - 1] );
    },

    closeStompDebug() {
        if (this.clientIns) {
            if (isDev || isTest) {
                this.clientIns.debug = function (message) {
                    console.debug(message);
                };
            }
        }
    },

    // 订阅指定的topic
    subscribe(topic, onmessage, headers) {
        this.topic = topic;
        this.onmessage = onmessage;
        this.headers = headers;
        if (!this.status) {
            this.subscribeMap.set(topic, {dest: topic, handler: onmessage, sub: null});
        } else {
            const sub = this.clientIns.subscribe(topic, onmessage);
            this.subscribeMap.set(topic, {dest: topic, handler: onmessage, sub: sub});
        }
    },

    unsubscribe(topic) {
        const subscription = this.subscribeMap.get(topic);
        if (subscription && subscription.sub) {
            subscription.sub.unsubscribe();
            this.subscribeMap.delete(topic);
            console.log('取消订阅:' + topic);
        } else if (subscription) {
            this.subscribeMap.delete(topic);
        }
    },

    // 发送消息
    send(url, msg) {
        if (this.status) {
            if (msg) {
                msg = JSON.stringify(msg);
                this.clientIns.send(url, {}, msg);
            } else {
                console.error('发送消息为空');
            }
        } else {
            setTimeout(() => {
                this.send(url, msg);
            }, 300);
        }
    },

    disconnect() {
        if (this.clientIns) {
            if (this.clientIns.connected) {
                this.clientIns.disconnect();
            }
            this.isPassived = false;
            this.websocket.close();
            this.websocket = null;
            this.clientIns = null;
        }
        this.status = false;
        console.info('断开连接');
    }

};

export default StompClient;