using System;
using System.Drawing;
using System.Threading.Tasks;
using System.Timers;
using System.Windows.Forms;

namespace TrackerBridge
{
    public class FakeTracker : IBridgeTracker
    {
        public event ConnectionEventHandler ConnectionEvent;
        public event ConnectionEventHandler ConnectionTimeout;
        public event GazeDataHandler GazeDataAvailable {
            add {
                gazeDataProcessor.GazeDataProcessed += value;
            }
            remove {
                gazeDataProcessor.GazeDataProcessed -= value;
            }
        }

        private readonly GazeDataProcessor gazeDataProcessor;
        private System.Timers.Timer timer;
        private Single trackerFrequency;

        public Single OutputFrequency {
            get => gazeDataProcessor.OutputFrequency;
            set => gazeDataProcessor.OutputFrequency = value;
        }
        public String SerialNumber => "Fake";
        public Single TrackingFrequency {
            get {
                return trackerFrequency;
            }
            set {
                trackerFrequency = value;
                TimerSetup();
            }
        }

        public FakeTracker(Single frequency)
        {
            trackerFrequency = frequency;
            gazeDataProcessor = new GazeDataProcessor();
        }

        public void Connect()
        {
            TimerSetup();
            ConnectionEvent?.Invoke(this);
        }

        private void TimerSetup()
        {
            timer?.Stop();
            timer?.Dispose();
            timer = new System.Timers.Timer(1000.0 / trackerFrequency);
            timer.Elapsed += (Object sender, ElapsedEventArgs e) =>
            {
                Point mousePosition = Control.MousePosition;
                GazeData data = new GazeData(mousePosition.X, mousePosition.Y, mousePosition.X, mousePosition.Y, 0, 0);
                gazeDataProcessor.Process(this, data);
            };
            timer.AutoReset = true;
            timer.Start();
        }
    }
}