const JitsiConference = require('./JitsiConference');
import * as JitsiConnectionEvents from './JitsiConnectionEvents';
import XMPP from './modules/xmpp/xmpp';
const Statistics = require('./modules/statistics/statistics');

/**
 * Creates new connection object for the Jitsi Meet server side video conferencing service. Provides access to the
 * JitsiConference interface.
 * @param appID identification for the provider of Jitsi Meet video conferencing services.
 * @param token the JWT token used to authenticate with the server(optional)
 * @param options Object with properties / settings related to connection with the server.
 * @constructor
 */
function JitsiConnection(appID, token, options) {
    this.appID = appID;
    this.token = token;
    this.options = options;
    this.xmpp = new XMPP(options, token);

    this.addEventListener(JitsiConnectionEvents.CONNECTION_FAILED,
        (errType, msg) => {
            // sends analytics and callstats event
            Statistics.sendEventToAll(`connection.failed.${errType}`,
                {label: msg});
        });

    this.addEventListener(JitsiConnectionEvents.CONNECTION_DISCONNECTED,
        msg => {
            // we can see disconnects from normal tab closing of the browser
            // and then there are no msgs, but we want to log only disconnects
            // when there is real error
            if(msg) {
                Statistics.analytics.sendEvent(
                    `connection.disconnected.${msg}`);
            }
            Statistics.sendLog(
                JSON.stringify({id: 'connection.disconnected', msg}));
        });
}

/**
 * Connect the client with the server.
 * @param options {object} connecting options
 * (for example authentications parameters).
 */
JitsiConnection.prototype.connect = function(options) {
    if(!options) {
        options = {};
    }

    this.xmpp.connect(options.id, options.password);
};

/**
 * Attach to existing connection. Can be used for optimizations. For example:
 * if the connection is created on the server we can attach to it and start
 * using it.
 *
 * @param options {object} connecting options - rid, sid and jid.
 */
JitsiConnection.prototype.attach = function(options) {
    this.xmpp.attach(options);
};

/**
 * Disconnect the client from the server.
 */
JitsiConnection.prototype.disconnect = function(...args) {
    // XXX Forward any arguments passed to JitsiConnection.disconnect to
    // XMPP.disconnect. For example, the caller of JitsiConnection.disconnect
    // may optionally pass the event which triggered the disconnect in order to
    // provide the implementation with finer-grained context.
    this.xmpp.disconnect(...args);
};

/**
 * This method allows renewal of the tokens if they are expiring.
 * @param token the new token.
 */
JitsiConnection.prototype.setToken = function(token) {
    this.token = token;
};

/**
 * Creates and joins new conference.
 * @param name the name of the conference; if null - a generated name will be
 * provided from the api
 * @param options Object with properties / settings related to the conference
 * that will be created.
 * @returns {JitsiConference} returns the new conference object.
 */
JitsiConnection.prototype.initJitsiConference = function(name, options) {
    return new JitsiConference({name, config: options, connection: this});
};

/**
 * Subscribes the passed listener to the event.
 * @param event {JitsiConnectionEvents} the connection event.
 * @param listener {Function} the function that will receive the event
 */
JitsiConnection.prototype.addEventListener = function(event, listener) {
    this.xmpp.addListener(event, listener);
};

/**
 * Unsubscribes the passed handler.
 * @param event {JitsiConnectionEvents} the connection event.
 * @param listener {Function} the function that will receive the event
 */
JitsiConnection.prototype.removeEventListener = function(event, listener) {
    this.xmpp.removeListener(event, listener);
};

/**
 * Returns measured connectionTimes.
 */
JitsiConnection.prototype.getConnectionTimes = function() {
    return this.xmpp.connectionTimes;
};

/**
 * Adds new feature to the list of supported features for the local
 * participant.
 * @param {String} feature the name of the feature.
 * @param {boolean} submit if true - the new list of features will be
 * immediately submitted to the others.
 */
JitsiConnection.prototype.addFeature = function(feature, submit = false) {
    return this.xmpp.caps.addFeature(feature, submit);
};

/**
 * Removes a feature from the list of supported features for the local
 * participant
 * @param {String} feature the name of the feature.
 * @param {boolean} submit if true - the new list of features will be
 * immediately submitted to the others.
 */
JitsiConnection.prototype.removeFeature = function(feature, submit = false) {
    return this.xmpp.caps.removeFeature(feature, submit);
};

module.exports = JitsiConnection;