using System.Xml.Serialization;

namespace ShrlAlgoToolkit.RevitAddins.RvIndependent.MetroGauges.LandXMLData
{
    [XmlInclude(typeof(Curve))]
    [XmlInclude(typeof(Spiral))]
    [XmlInclude(typeof(Line))]
    [Serializable]
    public abstract class Interval
    {
        [XmlElement("Start")]
        public TextPoint2D Start
        {
            get => _points[0];
            set => _points[0] = value;
        }

        [XmlElement("End")]
        public TextPoint2D End
        {
            get => _points[1];
            set => _points[1] = value;
        }

        [XmlAttribute("length")]
        public double Length { get; set; }

        [XmlIgnore]
        internal List<TextPoint2D> _points { get; set; }

        public abstract double GetDirectionAtPoint(double station);

        public void Transform(GeometryTransformations transformations)
        {
            Length *= transformations.ScaleFactor;
            Line line = this as Line;
            if (line != null)
            {
                line.Dir += transformations.Phi;
            }
            else
            {
                Curve curve = this as Curve;
                if (curve != null)
                {
                    curve.DirStart += transformations.Phi;
                    curve.DirEnd += transformations.Phi;
                    curve.Radius *= transformations.ScaleFactor;
                }
                else
                {
                    Spiral spiral = this as Spiral;
                    if (spiral != null)
                    {
                        spiral.Dir += transformations.Theta;
                    }
                }
            }

            foreach (TextPoint2D textPoint2D in _points)
            {
                textPoint2D.Transform(transformations, false);
            }
        }
    }
}