using StgSharp.Math;
using System;

namespace StgSharp.Geometries
{
    /// <summary>
    /// Part of a circle. All points on a arc has the same distance to their center.
    /// </summary>
    public class Arc : PlainGeometry
    {
        internal Point center;
        internal Point beginPoint;
        internal Point endPoint;
        internal GetLocationHandler movCenterOperation = new GetLocationHandler(GeometryOperation.DefualtMotion);
        internal GetLocationHandler movBeginOperation = new GetLocationHandler(GeometryOperation.DefualtMotion);
        internal GetLocationHandler movEndOperation = new GetLocationHandler(GeometryOperation.DefualtMotion);

        internal override int[] Indices => throw new NotImplementedException();

        public virtual vec3d MoveCenter(uint tick) => movCenterOperation.Invoke(tick);

        public virtual vec3d MovBegin(uint tick) => movBeginOperation.Invoke(tick);

        public virtual vec3d MovEnd(uint tick) => movEndOperation.Invoke(tick);

        internal override void UpdateCoordinate(uint tick)
        {
            tick = time;
            center.Position = this.coordinate.origin + MoveCenter(tick);
            beginPoint.Position = this.coordinate.origin + MovBegin(tick);
            endPoint.Position = this.coordinate.origin + MovEnd(tick);
        }

        public override Line[] GetAllSides() => throw new NotImplementedException();

        public override Plain GetPlain()
        {
            return new Plain(this.center, this.beginPoint, this.endPoint);
        }

    }
}