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

namespace StgSharp_Entity
{

    public class Bullet:LinkedTarget
    {
        
        //子弹的缩放比例
        private float _size;

        public float Size
        {
            get { return _size; }
            set {
                if (value > 0)
                {
                    _size = value;
                    this.Radius = DefualtRadius * Size;
                }
                else
                {
                    throw new ArgumentException("Size cannot be smaller than zero!");
                }
            }
        }

        //该种类子弹的默认大小
        private static float _defualtRadius;

        public static float DefualtRadius
        {
            get { return _defualtRadius; }
            set { _defualtRadius = value; }
        }

        //子弹的实际判定半径
        private float _radius;

        public float Radius
        {
            get { return _radius; }
            set { _radius = value; }
        }

        //子弹x轴运动的函数表达
        private float[] _xVelocity;

        public float[] XVelocity
        {
            get { return _xVelocity; }
            set {
                if (value.Length==10)
                {
                    _xVelocity = value;
                }
                else
                {
                    throw new ArgumentException("Too many or too few parameters!");
                }
            }
        }

        //子弹y轴运动的函数表达
        private float[] _yVelocity;

        public float[] YVelocity
        {
            get { return _yVelocity; }
            set
            {
                if (value.Length == 10)
                {
                    _yVelocity = value;
                }
                else
                {
                    throw new ArgumentException("Too many or too few parameters!");
                }
            }
        }

        private float _xVertical;

        //xy坐标
        public float XVertical
        {
            get { return _xVertical; }
            set { _xVertical = value; }
        }

        private float _yVertical;

        public float YVertical
        {
            get { return _yVertical; }
            set { _yVertical = value; }
        }

        private uint _beginTick;

        public uint BeginTick
        {
            get { return _beginTick; }
            set { _beginTick = value; }
        }


        //通过传入的时间刻计算位移并更新位置坐标
        public void move(uint tick)
        {
            float deltaTick = tick - _beginTick;
            float deltaX = 0;
            for (int i = 0; i < 10; i++)
            {
                deltaX += _xVelocity[i];
                deltaX *= deltaTick;
            }
            deltaX += _xVelocity[10];
            _xVertical += deltaX;
            float deltaY = 0;
            for (int i = 0; i < 10; i++)
            {
                deltaY += _yVelocity[i];
                deltaY *= deltaTick;
            }
            deltaY += _yVelocity[10];
            _yVertical += deltaY;
        }

        public Bullet()
        {
        }

        /// <summary>
        /// 修改自身路径，修改条件由外部逻辑判断触发
        /// </summary>
        public void ChangeVelocity(float[] newXSpeed,float[] newYSpeed)
        {
            if (newXSpeed != null)
            {
                if (newXSpeed.Length == 10)
                {
                    this._xVelocity = newXSpeed;
                }
                else
                {
                    throw new Exception("The amount of parameters should be 10!");
                }
            }
            if (newYSpeed != null)
            {
                if (newYSpeed.Length == 10)
                {
                    this._yVelocity = newYSpeed;
                }
                else
                {
                    throw new Exception("The amount of parameters should be 10!");
                }
            }
        }


    }
}