using System;
using System.Collections.Generic;
using System.Linq;

namespace IStation.WinFrmUI.Curve
{
    /// <summary>
    ///  数字辅助类
    /// </summary>
    public class MathHelper
    {

        #region 16进制字符
        /// <summary>
        /// 16进制字符转十进制:如A1就是10*16+1
        /// </summary> 
        public static int GetDecimalByHexString(string strHexStr)
        {
            if (strHexStr.Count() != 2)
                return 0;
            return GetDecimalByHexChar(strHexStr[0]) * 16 + GetDecimalByHexChar(strHexStr[1]);
        }

        /// <summary>
        /// 获取16进制字符
        /// </summary> 
        public static short GetDecimalByHexChar(char strHexStr)
        {
            switch (strHexStr)
            {
                case '0':
                    return 0;
                case '1':
                    return 1;
                case '2':
                    return 2;
                case '3':
                    return 3;
                case '4':
                    return 4;
                case '5':
                    return 5;
                case '6':
                    return 6;
                case '7':
                    return 7;
                case '8':
                    return 8;
                case '9':
                    return 9;
                case 'a':
                case 'A':
                    return 10;
                case 'b':
                case 'B':
                    return 11;
                case 'c':
                case 'C':
                    return 12;
                case 'd':
                case 'D':
                    return 13;
                case 'e':
                case 'E':
                    return 14;
                case 'f':
                case 'F':
                    return 15;

                default:
                    return 0;
            }


        }

        #endregion

        #region 四舍五入圆整
        //四舍五入圆整,如  0.44 -> 0.4  , 0.46 -> 0.5//flag--小数点后位数
        public static double Regulate(double v, int flag)
        {
            bool isNegative = false;
            //如果是负数
            if (v < 0)
            {
                isNegative = true;
                v = Math.Abs(v);
            }
            else
            {
                isNegative = false;
            }

            double value = Math.Round(v, flag);
            if (isNegative)
            {
                value = -value;
            }
            return value;
        }

        //四舍五入圆整,如  0.44 -> 0.4  , 0.46 -> 0.5//flag--小数点后位数
        public static List<Model.CurvePoint> Regulate(List<Model.CurvePoint> inPoints, int flag)
        {
            if (inPoints == null)
                return null;
            List<Model.CurvePoint> outPoints = new List<Model.CurvePoint>();
            for (int i = 0; i < inPoints.Count(); i++)
            {
                outPoints.Add(new Model.CurvePoint(Regulate(inPoints[i].X, flag), Regulate(inPoints[i].Y, flag)));
            }
            return outPoints;
        }

        public static List<Model.CurvePoint> Regulate(List<Model.CurvePoint> inPoints, int flagX, int flagY)
        {
            if (inPoints == null)
                return null;
            List<Model.CurvePoint> outPoints = new List<Model.CurvePoint>();
            for (int i = 0; i < inPoints.Count(); i++)
            {
                outPoints.Add(new Model.CurvePoint(Regulate(inPoints[i].X, flagX), Regulate(inPoints[i].Y, flagY)));
            }
            return outPoints;
        }

        //四舍五入圆整,如  0.44 -> 0.4  , 0.46 -> 0.5//flag--小数点后位数
        public static void Regulate(ViewModel.RatedParas paras, int flag)
        {
            if (paras == null)
                return;

            paras.Q = Regulate(paras.Q, flag);
            paras.H = Regulate(paras.H, flag);
            paras.E = Regulate(paras.E, flag);
            paras.P = Regulate(paras.P, flag);
            paras.NPSHr = Regulate(paras.NPSHr, flag);

            return;
        }
        #endregion

        #region 向上圆整

        public static double RegulateUp(double m, int flag)
        {
            double k = 1;
            for (int i = 0; i < flag; i++)
            {
                k = k * 10;
            }
            return System.Math.Ceiling(m * k) / k;
        }

        public static int RoundUp2(double v)
        {
            int k = (int)(v / 2) * 2 + 2;
            return k;
        }
        public static int RoundUp5(double v)
        {
            int k = (int)(v / 5) * 5 + 5;
            return k;
        }
        public static int RoundUp10(double v)
        {
            int k = (int)(v / 10) * 10 + 10;
            return k;
        }
        #endregion

        #region 向下圆整

        public static double RegulateDown(double m, int flag)
        {
            double k = 1;
            for (int i = 0; i < flag; i++)
            {
                k = k * 10;
            }
            return System.Math.Floor(m * k) / k;
        }
        public static int RoundDown2(double v)
        {
            int k = (int)(v / 2) * 2;
            return k;
        }
        public static int RoundDown5(double v)
        {
            int k = (int)(v / 5) * 5;
            return k;
        }
        public static int RoundDown10(double v)
        {
            int k = (int)(v / 10) * 10;
            return k;
        }

        #endregion

        #region 小数点长度
        /// <summary>
        /// 获取小数点长度
        /// </summary> 
        public static int GetDecimalPlacesLength(double value)
        {
            string text = value.ToString();
            int num = text.IndexOf('.');
            if (num >= 0)
            {
                return text.Length - num - 1;
            }
            return 0;
        }


        /// <summary>
        /// 获取小数点长度
        /// </summary> 
        public static double GetByPlacesLength(double value, int length)
        {
            int decimalPlacesLength = GetDecimalPlacesLength(value);
            if (decimalPlacesLength > length)
            {
                return Math.Round(value, length);
            }
            return value;
        }
        #endregion

    }
}