//	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
{
	public class DrawTables
	{
		public static int Table(Spludlow.Printing.PrintDoc printDoc, DataTable table, float x, float y, float tableWidth, float tableHeight, float rowHeight, int startRowIndex)
		{
			TableStyle style = new TableStyle();

			return Table(printDoc, table, x, y, tableWidth, tableHeight, rowHeight, startRowIndex, style);
		}

		public static int Table(Spludlow.Printing.PrintDoc printDoc, DataTable table, float x, float y, float tableWidth, float tableHeight, float rowHeight, int startRowIndex, TableStyle style)
		{
			string[] columnsInfo = null;

			if (columnsInfo == null)
			{
				columnsInfo = new string[table.Columns.Count];

				for (int columnIndex = 0; columnIndex < table.Columns.Count; ++columnIndex)
					columnsInfo[columnIndex] = table.Columns[columnIndex].ColumnName;
			}

			//	ColumnName	width	Heading	format			?StringAlignment


			//columnsInfo = new string[]
			//{
			//	"OrderID		30	Order No",
			//	"CustomerID		30	Customer Ref",
			//	"OrderDate		30	Order Date			{0:d}",
			//	"Freight		30	Freight				{0:C}",
			//	"ShipAddress	80	Ship Address",
			//};

			DataTable defTable = Spludlow.Data.TextTable.ReadText(new string[]
			{
				"ColumnName	Width	Heading	Format	Position",
				"String		Single	String	String	Single",
			});

			float defaultColumnWidth = tableWidth / columnsInfo.Length;     //	Must have tableWidth

			float position = 0;

			foreach (string line in columnsInfo)
			{
				string[] words = Spludlow.Text.Split(line, '\t', true, false);

				string columnName = "";
				if (words.Length > 0)
					columnName = words[0];

				float columnWidth = defaultColumnWidth;
				if (words.Length > 1)
					columnWidth = Single.Parse(words[1]);

				string heading = "";
				if (words.Length > 2)
					heading = words[2];

				string format = "";
				if (words.Length > 3)
					format = words[3];

				defTable.Rows.Add(columnName, columnWidth, heading, format, position);

				position += columnWidth;
			}

			position = y;

			if (style.HeadingBackColour != Color.Empty)
				printDoc.Rectangle(x, y, tableWidth, rowHeight, 0, Color.Empty, style.HeadingBackColour);

			foreach (DataRow defRow in defTable.Rows)
			{
				string columnName = (string)defRow["ColumnName"];
				if (columnName == "")
					continue;

				string heading = (string)defRow["Heading"];
				if (heading == "")
					heading = columnName;

				float width = (float)defRow["Width"];
				float xPosition = (float)defRow["Position"];

				printDoc.TextBox(heading, style.HeadingFont, x + xPosition, position, width, rowHeight, style.HeadingForeColour, StringAlignment.Center);
			}

			position += rowHeight;

			int index;
			for (index = startRowIndex; index < table.Rows.Count && (position <= (y + tableHeight)); ++index)
			{
				DataRow row = table.Rows[index];

				foreach (DataRow defRow in defTable.Rows)
				{
					string columnName = (string)defRow["ColumnName"];
					if (columnName == "")
						continue;

					if (row.IsNull(columnName) == true)
						continue;

					float columnWidth = (float)defRow["Width"];
					string format = (string)defRow["Format"];
					float xPosition = (float)defRow["Position"];

					Color rowUseBackColour = style.RowBackColour;
					if ((index % 2) != 0)
						rowUseBackColour = style.RowBackAltColour;

					if (rowUseBackColour != Color.Empty)
						printDoc.Rectangle(x + xPosition, position, columnWidth, rowHeight, 0, Color.Empty, rowUseBackColour);

					Color rowUseForeColour = style.RowForeColour;
					if ((index % 2) != 0)
						rowUseForeColour = style.RowForeAltColour;

					string text;

					if (format == "")
						text = Convert.ToString(row[columnName]);
					else
						text = String.Format(format, row[columnName]);

					printDoc.TextBox(text, style.RowFont, x + xPosition, position, columnWidth, rowHeight, rowUseForeColour);
				}

				if (style.HorizontalLineWeight > 0)
					printDoc.Line(x, position, x + tableWidth, position, style.HorizontalLineWeight, style.LineColour);

				position += rowHeight;
			}

			if (style.OuterLineWeight > 0)
				printDoc.Rectangle(x, y, tableWidth, position - y, style.OuterLineWeight, style.LineColour, Color.Empty);

			if (style.VerticalLineWeight > 0)
			{
				foreach (DataRow defRow in defTable.Rows)
				{

					float width = (float)defRow["Width"];
					float xPosition = (float)defRow["Position"];

					if ((x + xPosition + width) != (x + tableWidth))
						printDoc.Line(x + xPosition + width, y, x + xPosition + width, position, style.VerticalLineWeight, style.LineColour);
				}
			}


			if (index >= (table.Rows.Count - 1))
				index = (int)-position;

			return index;
		}
	}
}