using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;
using System.Drawing;

namespace VEPROMS.CSLA.Library
{
	public static class ColorConfig
	{
		private static Regex byARGB = new Regex(@"Color \[A=([0-9]*), R=([0-9]*), G=([0-9]*), B=([0-9]*)\]");
		private static Regex byName = new Regex(@"Color \[(.*)\]");
		private static Regex byRGB = new Regex(@"[0-9]*,[0-9]*,[0-9]*");
		public static Color ColorFromString(string sColor)
		{
			if (sColor == string.Empty) return Color.Empty;
			Match myMatch = byARGB.Match(sColor); // New Format by ARGB
			if (myMatch.Groups.Count == 5)
				return FindKnownColor(Color.FromArgb(int.Parse(myMatch.Groups[1].Value), int.Parse(myMatch.Groups[2].Value), int.Parse(myMatch.Groups[3].Value), int.Parse(myMatch.Groups[4].Value)));
			myMatch = byName.Match(sColor); // New Format by Name
			if (myMatch.Groups.Count == 2)
				return Color.FromName(myMatch.Groups[1].Value);
			myMatch = byRGB.Match(sColor); // Old Format by RGB
			if (sColor[0] == '[') // Old Format by ARGB
			{
				string[] parts = sColor.Substring(1, sColor.Length - 2).Split(",".ToCharArray());
				return FindKnownColor(Color.FromArgb(Int32.Parse(parts[0]), Int32.Parse(parts[1]), Int32.Parse(parts[2]), Int32.Parse(parts[3])));
			} 
			if (myMatch.Groups.Count == 4)
				return FindKnownColor(Color.FromArgb(int.Parse(myMatch.Groups[1].Value), int.Parse(myMatch.Groups[2].Value), int.Parse(myMatch.Groups[3].Value)));
			return Color.FromName(sColor); // Old Format by Name
		}
		private static Dictionary<string, Color> _ConvertRGBToName;
		public static Dictionary<string, Color> ConvertRGBToName
		{
			get
			{
				if (_ConvertRGBToName == null)
				{
					_ConvertRGBToName = new Dictionary<string, Color>();
					foreach (KnownColor knownColor in Enum.GetValues(typeof(KnownColor)))
					{
						Color tmp1 = Color.FromKnownColor(knownColor);
						if (!tmp1.IsSystemColor)
						{
							Color tmp2 = Color.FromArgb(tmp1.ToArgb());
							if (!_ConvertRGBToName.ContainsKey(tmp2.Name)) // Use first name
								_ConvertRGBToName.Add(tmp2.Name, tmp1);
						}
					}
				}
				return _ConvertRGBToName;
			}
		}
		public static Color FindKnownColor(int r, int g, int b)
		{
			Color tmp = Color.FromArgb(r, g, b);
			if (ConvertRGBToName.ContainsKey(tmp.Name))
				return ConvertRGBToName[tmp.Name];
			return tmp;
		}
		public static Color FindKnownColor(Color tmp)
		{
			if (ConvertRGBToName.ContainsKey(tmp.Name))
				return ConvertRGBToName[tmp.Name];
			return tmp;
		}

	}
}