//	Spludlow Software
//	Copyright © Samuel P. Ludlow 2020 All Rights Reserved
//	Distributed under the terms of the GNU General Public License version 3
//	Distributed WITHOUT ANY WARRANTY; without implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE
//	https://www.spludlow.co.uk/LICENCE.TXT
//	The Spludlow logo is a registered trademark of Samuel P. Ludlow and may not be used without permission
//	v1.14

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

using System.Data;
using System.Drawing;

namespace Spludlow.Drawing
{
	/// <summary>
	/// Provides some pre-defined CMYK colours for PDF printing
	/// 
	/// You can add your own to the table if you like
	/// 
	/// For the reference sheet run: Spludlow.Drawing.CMYKColours.PaletteSheet(@"D:\CMYK Colour Reference.pdf");
	/// </summary>
	public class CMYKColours
	{
		public static DataTable Table = null;

		public static Dictionary<string, Color> Colours = null;

		static CMYKColours()
		{
			string filename = Spludlow.Config.ProgramData + @"\Data\CMYKColors.txt";

			Table = Spludlow.Data.TextTable.ReadFile(filename);

			Colours = new Dictionary<string, Color>();

			foreach (DataRow row in Table.Rows)
			{
				int c = (int)row["C"];
				int m = (int)row["M"];
				int y = (int)row["Y"];
				int k = (int)row["K"];

				string name = (string)row["Name"];

				Color colour = Color.FromArgb(c, m, y, k);

				Colours.Add(name, colour);
			}
		}
		
		public static void PaletteSheet(string pdfFilename)
		{
			int columns = 8;

			Color black = Colours["Black"]; // Color.FromArgb(0, 0, 0, 100);

			using (PDF pdf = new PDF(pdfFilename, "A4"))
			{
				pdf.CMYK = true;

				pdf.Text("Spludlow CMYK Colour Reference", "Arial, 18, Bold, Underline", pdf.Width / 2, 10.0F, black, 0, StringAlignment.Center, 0, Color.Empty);

				float xOff = 10.0F;
				float yOff = 20.0F;

				float size = (pdf.Width - xOff * 2) / columns;

				float textHeight = size * 0.35F;

				for (int index = 0; index < Table.Rows.Count; ++index)
				{
					DataRow row = Table.Rows[index];

					float xPos = xOff + ((index % columns) * size);
					float yPos = yOff + ((index / columns) * size);

					int c = (int)row["C"];
					int m = (int)row["M"];
					int y = (int)row["Y"];
					int k = (int)row["K"];

					double h = (double)row["H"];
					double s = (double)row["S"];
					double v = (double)row["V"];

					string name = (string)row["Name"];

					string text = name + Environment.NewLine + c + ", " + m + ", " + y + ", " + k + Environment.NewLine + (string)row["RGB"] + Environment.NewLine + h + ", " + s + ", " + v;

					Color colour = Colours[name];	// Color.FromArgb(c, m, y, k);

					pdf.Rectangle(xPos, yPos, size, size - textHeight, 0, Color.Empty, colour);

					pdf.TextBox(text, "Arial, 5, Bold", xPos, (yPos + size) - textHeight, size, textHeight, black, StringAlignment.Center, 0, Color.Empty);
				}
			}
		}

		public static void FixTable()		//	Used for tidying up the colours table from the original spread sheet, not for you
		{
			string filename = Spludlow.Config.ProgramData + @"\Data\CMYKColors.txt";

			DataTable table = Spludlow.Data.TextTable.ReadFile(filename);

			foreach (DataRow row in table.Rows)
			{
				string name = (string)row["Name"];

				int index;

				index = name.IndexOf("#");
				if (index != -1)
				{
					row["Name"] = name.Substring(0, index - 1).Replace(" ", "");
					row["NameRGB"] = name.Substring(index).Trim();
				}

				string rgb = (string)row["RGB"];
				rgb = rgb.ToUpper();
				row["RGB"] = rgb;

				Color colour = Color.FromArgb(Int32.Parse(rgb.Substring(1), System.Globalization.NumberStyles.HexNumber));

				double[] hsv = Spludlow.Drawing.Colour.ToHSV(colour);

				row["H"] = hsv[0];
				row["S"] = hsv[1];
				row["V"] = hsv[2];
			}

			DataTable tempTable = table.Clone();

			for (int pass = 0; pass < 3; ++pass)
			{
				DataView view = new DataView(table);
				view.Sort = "H";
				switch (pass)
				{
					case 0:
						view.RowFilter = "Row = -1";
						break;
					case 1:
						view.RowFilter = "Row > 0";
						break;
					case 2:
						view.RowFilter = "Row = 0";
						view.Sort = "K";
						break;
				}

				foreach (DataRowView rowView in view)
					tempTable.ImportRow(rowView.Row);
			}

			table = tempTable;

			Spludlow.Data.TextTable.Write(filename, table);

			table = Spludlow.Data.TextTable.ReadFile(filename);

			Spludlow.Log.Report("CMYK Colours", table);
		}
	}
}