namespace Poe2Trade.Navigation;

/// <summary>
/// Detects when the player hasn't moved significantly over a window of frames.
/// </summary>
internal class StuckDetector
{
    private readonly double _threshold;
    private readonly int _frameCount;
    private int _counter;
    private MapPosition? _lastPosition;

    public bool IsStuck => _counter >= _frameCount;

    public StuckDetector(double threshold, int frameCount)
    {
        _threshold = threshold;
        _frameCount = frameCount;
    }

    public void Update(MapPosition position)
    {
        if (_lastPosition != null)
        {
            var dx = position.X - _lastPosition.X;
            var dy = position.Y - _lastPosition.Y;
            if (Math.Sqrt(dx * dx + dy * dy) < _threshold)
                _counter++;
            else
                _counter = 0;
        }
        _lastPosition = position;
    }

    public void Reset()
    {
        _counter = 0;
        _lastPosition = null;
    }
}