using Chernobyl.Mathematics.Movement;

namespace Chernobyl.Mathematics.Geometry
{
    /// <summary>
    /// A <see cref="IShape"/> that can be translated, rotated, scaled, etc., 
    /// but not have a dimension (width, depth, volume, etc).
    /// </summary>
    public class NullShape : MatrixTransform, IShape
    {
        /// <summary>
        /// The largest width of the object in the object's X axis. This property 
        /// will always return 0.
        /// </summary>
        public float Width
        {
            get { return 0; }
        }

        /// <summary>
        /// The largest height of the object in the object's Y axis. This property 
        /// will always return 0.
        /// </summary>
        public float Height
        {
            get { return 0; }
        }

        /// <summary>
        /// The largest depth of the object in the object's Z axis. If the depth
        /// is zero, the object is 2D. This property will always return 0.
        /// </summary>
        public float Depth
        {
            get { return 0; }
        }

        /// <summary>
        /// True if this <see cref="IShape"/> is convex, false if it is concave
        /// or has 0 <see cref="Dimensions"/> (such as a point). A
        /// <see cref="IShape"/> is convex if for every pair of points within
        /// the object, every point on the straight line segment that joins them
        /// is also within the object. A concave <see cref="IShape"/> is the
        /// opposite of this. This property always return false for the 
        /// <see cref="NullShape"/>.
        /// </summary>
        public bool IsConvex
        {
            get { return false; }
        }

        /// <summary>
        /// The amount of space taken up by an object on a flat plane in
        /// square metres (m^2). This property always return 0 for the 
        /// <see cref="NullShape"/>.
        /// </summary>
        public float Area
        {
            get { return 0; }
        }

        /// <summary>
        /// The amount of 3D space this object consumes in cubic metres (m^3).
        /// If this object is 2D, then the value of this property is zero. 
        /// This property always return 0 for the <see cref="NullShape"/>.
        /// </summary>
        public float Volume
        {
            get { return 0; }
        }

        /// <summary>
        /// The length of the path that surrounds a shape specified in metres (m).
        /// In the case of a closed curve such as a circle, this value represents
        /// the circumference of the object. This property always return 0 for  
        /// the <see cref="NullShape"/>.
        /// </summary>
        public float Perimeter
        {
            get { return 0; }
        }

        /// <summary>
        /// The minimum number of coordinates needed to specify each point
        /// within this object. For example: a point has 0 dimensions, a
        /// line has 1 dimension, a circle or rectangle has 2 dimensions, a
        /// cube or sphere has 3 dimensions, and a moving cube or sphere has 4.
        /// This property always return 0 for the <see cref="NullShape"/>.
        /// </summary>
        public uint Dimensions
        {
            get { return 0; }
        }
    }
}