Animatroller.Framework.Controller.CueList.NextCue C# (CSharp) Method

        private void NextCue()
        {
            Cue cue;

            if (this.requestedCueId.HasValue)
            {
                cue = this.cues[this.requestedCueId.Value];
                this.requestedCueId = null;

                RunCue(this.requestedCueId.Value, cue, true, false);

                return;
            }

            if (this.cues.Count <= 0)
                // Nothing to do
                return;

            if (this.iterationsLeft.HasValue && this.iterationsLeft.Value == 0)
                // Done
                return;

            LockAllUsedDevices();

            cue = AdvanceCue();

            if (cue == null)
            {
                // Done
                this.currentCueId.OnNext(null);
                this.currentInstance = null;

                ReleaseLocks();
                return;
            }

            this.nextCuePos = GetNextCuePosition();

            if (this.currentCuePos == this.cues.Count - 1)
            {
                // Last cue
                if (this.iterationsLeft.HasValue)
                    this.iterationsLeft = this.iterationsLeft.Value - 1;
            }

            RunCue(this.currentCuePos, cue, false, !this.nextCuePos.HasValue);

            if (this.nextCuePos.HasValue)
            {
                var nextCue = this.cues[this.nextCuePos.Value];

                if (nextCue.Trigger == Cue.Triggers.Follow)
                {
                    CancellationTokenSource triggerCancelSource;
                    if (this.triggerCancelSources.TryGetValue(nextCue, out triggerCancelSource))
                    {
                        triggerCancelSource.Cancel();
                    }

                    triggerCancelSource = new CancellationTokenSource();
                    this.triggerCancelSources[nextCue] = triggerCancelSource;

                    Task.Delay(nextCue.TriggerTimeMs, triggerCancelSource.Token).ContinueWith(x =>
                        {
                            if (!x.IsCanceled)
                                this.triggerNext.Set();
                        });
                }
                else if (nextCue.Trigger == Cue.Triggers.CueListTime)
                {
                    //FIXME: How do we deal with this when we're playing the cuelist backwards?
                    int triggerDelay = nextCue.TriggerTimeMs - (int)this.cueListTime.ElapsedMilliseconds;

                    if (triggerDelay > 0)
                    {
                        CancellationTokenSource triggerCancelSource;
                        if (this.triggerCancelSources.TryGetValue(nextCue, out triggerCancelSource))
                        {
                            triggerCancelSource.Cancel();
                        }

                        triggerCancelSource = new CancellationTokenSource();
                        this.triggerCancelSources[nextCue] = triggerCancelSource;

                        Task.Delay(triggerDelay, triggerCancelSource.Token).ContinueWith(x =>
                        {
                            if (!x.IsCanceled)
                                this.triggerNext.Set();
                        });
                    }
                }
            }
        }