namespace WPFluent.Controls
{
    public struct Hsb
    {
        public Hsb(double Hue, double Saturation, double Brightness, double opacity = 1)
        {
            this.Hue = Hue;
            this.Saturation = Saturation;
            this.Brightness = Brightness;
            Opacity = opacity;
        }

        /// <summary>
        /// 亮度0~1
        /// </summary>
        public double Brightness { get; set; }

        /// <summary>
        /// 色相0~359
        /// </summary>
        public double Hue { get; set; }

        /// <summary>
        /// 不透明度0~1
        /// </summary>
        public double Opacity { get; set; }

        /// <summary>
        /// 饱和度0~1
        /// </summary>
        public double Saturation { get; set; }

        public static Hsb FromHSB(double hue, double saturation, double brightness, double opacity = 1)
        {
            return new Hsb(hue, saturation, brightness, opacity);
        }

        public static Hsb FromColor(Color color)
        {
            var hsb = new Hsb();
            var max = Math.Max(color.R, Math.Max(color.G, color.B));
            var min = Math.Min(color.R, Math.Min(color.G, color.B));
            var delta = max - min;
            hsb.Brightness = max / 255.0;
            hsb.Saturation = max == 0 ? 0 : delta / max;
            if (delta == 0)
            {
                hsb.Hue = 0;
            }
            else if (max == color.R)
            {
                hsb.Hue = (color.G - color.B) / delta;
            }
            else if (max == color.G)
            {
                hsb.Hue = 2 + (color.B - color.R) / delta;
            }
            else
            {
                hsb.Hue = 4 + (color.R - color.G) / delta;
            }
            hsb.Hue *= 60;
            if (hsb.Hue < 0)
                hsb.Hue += 360;
            return hsb;
        }


        //public override string ToString()
        //{
        //    return base.ToString();
        //}
    }
}