let audio = {

    audioLoop: null,

    init: function() {
        if (ua.audioInstance)
            return;
    
        ua.audioInstance = document.createElement('audio');
    },

    addTrack: function(track) {
        if (ua.audioInstance)
            this.stop();
            
        this.init();

        ua.audioInstance.src = this.getTrackPath(track);
    },

    addStream: function(stream) {
        if (ua.audioInstance)
            this.stop();

        this.init();

        ua.audioInstance.srcObject = stream;
    },

    play: function(loop = false) {
        if (!ua.audioInstance)
            return;

        ua.audioInstance.volume = Softphone.getVolume();

        ua.audioInstance.play();

        if (loop) {
            this.audioLoop = setInterval(function() {
                ua.audioInstance.play();
            }, 2000);
        }
    },

    stop: function() {
        if (!ua.audioInstance)
            return;
    
        if (this.audioLoop)
            clearInterval(this.audioLoop);

        ua.audioInstance.pause();
        ua.audioInstance = null;
    },

    isPlaying: function() {
        if (!ua.audioInstance.paused)
            return true;
    },

    getTrackPath: function(track) {
        return `/static/audio/${track}.wav`;
    }
}