//Constructor for creating a endpoint object with video xapi.
const util = require('util');
const EventEmitter = require('events').EventEmitter;
const jsxapi = require('jsxapi');

//pass in object
function TPXapi(endpoint){
    this.endpoint = endpoint;
    this.xapi;
    this.connectedStatus = 'false';
    this.domain = '.webex.com';
    this.mysite = 'mysite';
    this.init();
}
util.inherits(TPXapi,EventEmitter);
TPXapi.prototype.init = function(){
    const self = this;
    return self.connect()
        .then((status) =>{
            console.log(status);
            self.onReady();
            return;
        })
        .catch((err) => {
            console.error(err);
        })
}
//connect to ssh service on endpoints
TPXapi.prototype.connect = function() {
    var self = this;
    return new Promise((resolve, reject) => {
        self.xapi = jsxapi.connect('ssh://' + self.endpoint.ipAddress, {
            username: self.endpoint.username,
            password: self.endpoint.password,
            keepaliveInterval: 4000
        });
        self.onError();
        resolve ("Connection opening..........")
            .catch ((err) => {
                reject (console.error(err));
            });
    });
}
//Load event monitoring after connecting via ssh to endpoint
TPXapi.prototype.onReady =  function(){
    const self = this;
    self.xapi.on('ready', () => {
        console.log("connexion successful!");
        self.connectedStatus = "true";
        self.webexMeeting();
        return self;
    })
};
//event monitors for webex meetings
TPXapi.prototype.webexMeeting = function(){
    const self =this;
    self.xapi.event.on('UserInterface Extensions Event PageOpened', (event) => {
        console.log('event', event.PageId);
        if (event.PageId == 'webex_dial') {
            //Intial press of webex button
            self.xapi.command('UserInterface Message TextInput Display', {
                FeedbackId: 'MeetingID_webex',
                InputType: 'Numeric',
                KeyboardState: 'Open',
                Title: 'Join a Webex Meeting',
                Text: 'Enter the Meeting ID',
                Placeholder: 'Meeting ID',
                SubmitText: 'Join'
            });
        }
    });
    //Making calling to webex meeeting once ID is entered.
    self.xapi.event.on('UserInterface Message TextInput Response', (event) => {
        if (event.FeedbackId === 'MeetingID_webex') {
            var ID = event.Text;
            var URI = ID + '@' +self.mysite+ self.domain;
            self.xapi.command('Dial', { Number: URI });
        }
    });
};
//track ssh error events and reconnect
TPXapi.prototype.onError =  function(){
    const self = this;
    self.xapi.on('error', (err) => {
        console.error(`connexion failed: ${err}, exiting`);
        setTimeout(function(){
            self.init();
        }, 4000)
    });

};
module.exports = TPXapi;