using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace StgSharp_Geometry
{
    internal unsafe class PointOnCircle : Point
    {
        private Circle _bindedItem;

        public Circle geometryItem
        {
            get { return _bindedItem; }
            set { _bindedItem = value; }
        }

        private float _angle;

        public float Angle
        {
            get { return _angle; }
            set { _angle = value; }
        }

        private float[] _angularVelocity;
        private readonly uint beginTick;
        private readonly uint* nowtick; 

        public PointOnCircle(Circle c, float p, float angle, uint counts,uint* gameTick)
        {
            _bindedItem = c;
            _angle = (angle + counts * (360.0f / counts))*(float)(2*Math.PI/360);
            nowtick = gameTick;
            beginTick = *gameTick;
        }

        public void AddRotation(float[] aFunc)
        {
            if (aFunc.Length==10)
            {
            _angularVelocity=aFunc;
            }
            else
            {
                throw new Exception("Parameters are too much or too few!");
            }
        }
        public override void OnRender()
        {
            if (_angularVelocity!=null)
            {
                uint a = *nowtick - beginTick;
                float deltaAngle = 0;
                for (int i = 0; i < 10; i++)
                {
                    deltaAngle += _angularVelocity[i];
                    deltaAngle *= a;
                }
                _angle+=deltaAngle;
            }

            this.X = (float)(_bindedItem.Center.X + _bindedItem.Radius * Math.Cos(_angle));
            this.Y = (float)(_bindedItem.Center.X + _bindedItem.Radius * Math.Sin(_angle));

        }
    }
}