using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Yw.WinFrmUI.Phart
{
    /// <summary>
    /// 随机色辅助类
    /// </summary>
    public class RandomColorHelper
    {

        private static readonly List<Color> _color_array = new List<Color>()
        {
            Color.Red, Color.Blue, Color.Green,Color.DodgerBlue,
            Color.Fuchsia, Color.MidnightBlue,  Color.Maroon, Color.Aquamarine,
            Color.Bisque,Color.BurlyWood
        };

        /// <summary>
        /// 获取随机颜色
        /// </summary>
        /// <returns></returns>
        public static Color Get(int count)
        {
            if (count < _color_array.Count)
            {
                return _color_array[count];
            }

            //var _random = new Random();
            //int r = _random.Next(1, 256);
            //int g = _random.Next(1, 256);
            //int b = _random.Next(1, 256);
            //return Color.FromArgb(r, g, b);

            return GetRandomDarkColor();
        }


        private static Color GetRandomDarkColor()
        {
            Random random = new Random();
            int r, g, b;
            do
            {
                r = random.Next(256);
                g = random.Next(256);
                b = random.Next(256);
            } while (CalculateBrightness(r, g, b) > 128); // 确保颜色是深色

            return Color.FromArgb(r, g, b);
        }

        private static int CalculateBrightness(int r, int g, int b)
        {
            // 计算颜色的亮度，亮度值越低，颜色越深
            return (r + g + b) / 3;
        }

    }
}