using System;
using System.Drawing;

namespace shjxCamera
{
    public class ColorDataPoint
    {
        #region protected
        /// <summary>
        /// 单点颜色
        /// </summary>
        protected Color PointColor { get; set; }

        protected void UpdatePoint()
        {
            PointColor = Color.FromArgb(Convert.ToInt32(RTV / Area), Convert.ToInt32(GTV / Area), Convert.ToInt32(BTV / Area));
        }
        #endregion

        #region properties

        /// <summary>
        /// 序号
        /// </summary>
        public int Id { get; set; }

        /// <summary>
        /// 区域R总量
        /// </summary>
        public double RTV { get; set; }

        /// <summary>
        /// 区域G总量
        /// </summary>
        public double GTV { get; set; }

        /// <summary>
        /// 区域B总量
        /// </summary>
        public double BTV { get; set; }

        /// <summary>
        /// 区域面积
        /// </summary>
        public double Area { get; set; }

        /// <summary>
        /// 小数点后位数
        /// </summary>
        public int FloatCount { get; set; }

        #endregion

        #region methods
        public ColorDataPoint(int id = 1, double rtv = 1, double gtv = 1, double btv = 1, double area = 1, int floatcount = 2)
        {
            Id = id;
            RTV = rtv;
            GTV = gtv;
            BTV = btv;
            Area = area;
            FloatCount = floatcount;
            UpdatePoint();
        }

        /// <summary>
        /// 返回单点R平均值
        /// </summary>
        /// <returns></returns>
        public double GetRSV()
        {
            double ret = Math.Round(RTV / Area, FloatCount);
            return ret;
        }

        /// <summary>
        /// 返回单点G平均值
        /// </summary>
        /// <returns></returns>
        public double GetGSV()
        {
            double ret = Math.Round(GTV / Area, FloatCount);
            return ret;
        }

        /// <summary>
        /// 返回单点B平均值
        /// </summary>
        /// <returns></returns>
        public double GetBSV()
        {
            double ret = Math.Round(BTV / Area, FloatCount);
            return ret;
        }

        /// <summary>
        /// 返回HSB色调值
        /// </summary>
        /// <returns></returns>
        public double GetHue()
        {
            UpdatePoint();
            return Math.Round(PointColor.GetHue(), FloatCount);
        }

        /// <summary>
        /// 返回HSB饱和度值
        /// </summary>
        /// <returns></returns>
        public double GetSaturation()
        {
            return 1.0;
#if false
            #region MyRegion

#if true
            UpdatePoint();
            return Math.Round(this.PointColor.GetSaturation(), FloatCount);
#endif

            #region MyRegion

            this.UpdatePoint();
            var vmax = Math.Max(this.GTV, Math.Max(this.RTV, this.BTV)) / this.Area;
            var vmin = Math.Min(this.GTV, Math.Min(this.RTV, this.BTV)) / this.Area;
            var sat = Math.Max(1.0, Math.Round((vmax - vmin) / vmax * 100.0, 2));
            return sat;

            #endregion
            #endregion
#endif
        }

        /// <summary>
        /// 返回HSB亮度值
        /// </summary>
        /// <returns></returns>
        public double GetBrightness()
        {
            UpdatePoint();
            return Math.Round(PointColor.GetBrightness(), FloatCount);
        }
        #endregion

    }
}