namespace Yw.Curve
{
    /// <summary>
    /// 曲线点
    /// </summary>
    public partial class CurvePoint : JsonList<CurvePoint>, ICloneable
    {

        /// <summary>
        /// 
        /// </summary>
        public CurvePoint() { }

        /// <summary>
        /// 
        /// </summary>
        public CurvePoint(int x, int y)
        {
            this.X = x;
            this.Y = y;
        }

        /// <summary>
        /// 
        /// </summary>
        public CurvePoint(float x, float y)
        {
            this.X = x;
            this.Y = y;
        }

        /// <summary>
        /// 
        /// </summary>
        public CurvePoint(double x, double y)
        {
            this.X = x;
            this.Y = y;
        }

        /// <summary>
        /// 
        /// </summary>
        public CurvePoint(decimal x, decimal y)
        {
            this.X = (double)x;
            this.Y = (double)y;
        }

        /// <summary>
        /// 
        /// </summary>
        public CurvePoint(CurvePoint rhs)
        {
            this.X = rhs.X;
            this.Y = rhs.Y;
        }


        /// <summary>
        /// X
        /// </summary>
        public double X { get; set; }

        /// <summary>
        /// Y
        /// </summary>
        public double Y { get; set; }

        /// <summary>
        ///  获取两点之间的距离
        /// </summary>
        public double Distance(CurvePoint pt)
        {
            if (pt == null)
            {
                return double.MaxValue;
            }
            return Math.Sqrt(Math.Pow(this.X - pt.X, 2) + Math.Pow(this.Y - pt.Y, 2));
        }

        /// <summary>
        /// 获取点到线的距离
        /// </summary>
        public double Distance(List<CurvePoint> ptList)
        {
            if (ptList == null || ptList.Count < 1)
            {
                return double.MaxValue;
            }
            return ptList.Min(x => x.Distance(this));
        }

        /// <summary>
        /// 判断是否是零点
        /// </summary>
        public bool IsZeroPoint()
        {
            if (this.X < 0.01 && this.Y < 0.01)
            {
                return true;
            }
            return false;
        }

        /// <summary>
        /// 判断是否为有效点
        /// </summary>
        public bool IsValidPoint()
        {
            if (double.IsNormal(this.X) && double.IsNormal(this.Y))
            {
                return true;
            }
            return false;
        }

        /// <summary>
        /// 判断是否为无效点
        /// </summary>
        public bool IsInvalidPoint()
        {
            if (double.IsNaN(this.X) || double.IsInfinity(this.X) || this.X == double.MinValue || this.X == double.MaxValue)
            {
                return true;
            }
            if (double.IsNaN(this.Y) || double.IsInfinity(this.Y) || this.Y == double.MinValue || this.Y == double.MaxValue)
            {
                return true;
            }
            return false;
        }

        /// <summary>
        /// 是否沿x轴的射线穿透线段,有交点且在线的左边
        /// </summary>
        public bool IsIntersectLineLeft(CurvePoint pt1, CurvePoint pt2)
        {
            if (pt1 == null || pt2 == null)
            {
                return false;
            }
            if (Math.Abs(pt1.Y - pt2.Y) < 0.0001)
            {
                if (Math.Abs(this.Y - pt1.Y) < 0.0001)
                {
                    return true;
                }
            }
            var ymin = UtilsHelper.Min(pt1.Y, pt2.Y);
            var ymax = UtilsHelper.Max(pt1.Y, pt2.Y);
            if (this.Y < ymax && this.Y >= ymin)
            {
                if (this.X <= (pt1.X + (pt2.X - pt1.X) * (this.Y - pt1.Y) / (pt2.Y - pt1.Y)))
                {
                    return true;
                }
            }
            return false;
        }


        /// <summary>
        /// 
        /// </summary>
        public CurvePoint Clone()
        {
            return new CurvePoint(this);
        }

        /// <summary>
        /// 
        /// </summary>
        object ICloneable.Clone()
        {
            return this.Clone();
        }















    }




}