namespace IStation.Curve
{

    /// <summary>
    /// 曲线表达式
    /// </summary>
    public class CurveExpress : JsonModel<CurveExpress>, ICloneable
    {
        /// <summary>
        /// 
        /// </summary>
        public CurveExpress() { }

        /// <summary>
        /// 
        /// </summary>
        public CurveExpress(CurveExpress rhs)
        {
            this.FitType = rhs.FitType;
            this.Min = rhs.Min;
            this.Max = rhs.Max;
            this.Index0 = rhs.Index0;
            this.Index1 = rhs.Index1;
            this.Index2 = rhs.Index2;
            this.Index3 = rhs.Index3;
            this.Index4 = rhs.Index4;
            this.DefinePoints = rhs.DefinePoints?.Select(x => new CurvePoint(x)).ToList();
        }

        /// <summary>
        /// 拟合类型
        /// </summary>
        public eFitType FitType { get; set; }

        /// <summary>
        /// 最大值
        /// </summary>
        public double Max { get; set; }

        /// <summary>
        /// 最小值
        /// </summary>
        public double Min { get; set; }

        /// <summary>
        /// 0次系数
        /// </summary>
        public double Index0 { get; set; }

        /// <summary>
        /// 1次系数
        /// </summary>
        public double Index1 { get; set; }

        /// <summary>
        /// 2次系数
        /// </summary>
        public double Index2 { get; set; }

        /// <summary>
        /// 3次系数
        /// </summary>
        public double Index3 { get; set; }

        /// <summary>
        /// 4次系数
        /// </summary>
        public double Index4 { get; set; }

        /// <summary>
        /// 定义点
        /// </summary>
        public List<CurvePoint> DefinePoints { get; set; }


        /// <summary>
        /// 获取拟合点
        /// </summary>
        public double GetFitPointY(double x)
        {
            return FitHelper.GetFitPointY(this, x);
        }

        /// <summary>
        /// 获取拟合点
        /// </summary>
        public List<CurvePoint> GetFitPoints(int pointNumber = 20)
        {
            return FitHelper.GetFitPoints(this, pointNumber);
        }

        /// <summary>
        /// 获取X区间内拟合点
        /// </summary>
        public List<CurvePoint> GetFitPointsByXRange(double minX, double maxX, int pointNumber = 20)
        {
            return FitHelper.GetFitPointsByXRange(this, minX, maxX, pointNumber);
        }


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

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

    }

}