namespace ProjectElectroTrans.Drawnings;

public class DrawingTransCompareByColor : IComparer<DrawingTrans?>
{
    public int Compare(DrawingTrans? x, DrawingTrans? y)
    {
        if (x == null && y == null) return 0;
        if (x == null || x.EntityTrans == null)
        {
            return 1;
        }

        if (y == null || y.EntityTrans == null)
        {
            return -1;
        }

        if (ToHex(x.EntityTrans.BodyColor) != ToHex(y.EntityTrans.BodyColor))
        {
            return String.Compare(ToHex(x.EntityTrans.BodyColor), ToHex(y.EntityTrans.BodyColor),
                StringComparison.Ordinal);
        }

        var speedCompare = x.EntityTrans.Speed.CompareTo(y.EntityTrans.Speed);
        if (speedCompare != 0)
        {
            return speedCompare;
        }

        return x.EntityTrans.Weight.CompareTo(y.EntityTrans.Weight);
    }

    private static String ToHex(Color c)
        => $"#{c.R:X2}{c.G:X2}{c.B:X2}";
}