import { Injectable } from '@angular/core';
import { Observable } from 'rxjs';

var INSECURE = 'ws://';
var SECURE = 'wss://';
@Injectable()

export class WebsocketService {
    public websocket: WebSocket;
    constructor() { }

    dynamicsMessage() {
        let url = ("ws://" + window.location.host + "/v2/broker/?topics=schd,msg");

        if (window.location.protocol === 'https:' && url.indexOf(INSECURE) === 0) {
            url = SECURE + url.substr(INSECURE.length);
        }

        this.websocket = new WebSocket(url);
        setInterval(() => {
            let msg = { "topic": "heart-beat", "message": "" };
            this.websocket.send(JSON.stringify(msg));
        }, 30000);
        return new Observable(ob => {
            this.websocket.onopen = () => {
                console.log('websocket was connected...')
            }
            this.websocket.onmessage = (event) => {
                ob.next(event.data)
            }
            this.websocket.onerror = () => {
                ob.error("连接失败")
            }
            this.websocket.onclose = () => {
                console.log('websocket was complete')
                ob.complete();
            }
        })
    }
}