using System;
using System.Collections.Generic;
using System.Text;
using iTextSharp.text;
using iTextSharp.text.pdf;
using iTextSharp.text.factories;
using Itenso.Rtf;
using Itenso.Rtf.Parser;
using Itenso.Rtf.Interpreter;
using Itenso.Rtf.Support;

namespace Volian.Print.Library
{
	public abstract partial class vlnPrintObject
	{
		public abstract float ToPdf(PdfContentByte cb, float yPageStart, float yTopMargin, float yBottomMargin);
	}
	public partial class vlnPrintObjects : List<vlnPrintObject>
	{
		public float ToPdf(PdfContentByte cb, float yPageStart, float yTopMargin, float yBottomMargin)
		{
			foreach (vlnPrintObject part in this)
			{
				yPageStart = part.ToPdf(cb, yPageStart, yTopMargin, yBottomMargin);
			}
			return yPageStart;
		}
	}
	public partial class vlnParagraphs : List<vlnParagraph>
	{
		public float ToPdf(PdfContentByte cb, float yPageStart, float yTopMargin, float yBottomMargin)
		{
			foreach (vlnParagraph child in this)
			{
				yPageStart = child.ToPdf(cb, yPageStart, yTopMargin, yBottomMargin);
			}
			return yPageStart;
		}
	}
	public partial class vlnParagraph : vlnPrintObject
	{
		public float ParagraphToPdf(PdfContentByte cb, float yPageStart, float yTopMargin, float yBottomMargin)
		{
			//Console.WriteLine("'{0}',{1},{2},{3},{4},{5},{6},{7},{8}", MyItemInfo.Path.Substring(_Prefix.Length).Trim(),
			//  cb.PdfWriter.CurrentPageNumber, yStart, YTop, yStart + YTop, yStart + YTop - _LastY, YTopMost, YSize, yPageStart);
			//_LastY = yStart + YTop;
			// 72 points per inchs. 504 is 7 inches wide.  3 1/2 inches wide: 252, 100);
			if (_PartsAbove != null && _PartsAbove.Count > 0) yPageStart = PartsAbove.ToPdf(cb, yPageStart, yTopMargin, yBottomMargin);
			float yLocation = yPageStart - YOffset;
			float retval = yLocation;
			if (MyItemInfo.IsStepSection)
			{
				Console.WriteLine("Step Section - {0}", MyItemInfo.Path);
			}
			else
			{
				retval = Rtf2Pdf.TextAt(cb, IParagraph, XOffset, yLocation, Width, 100);
				if (retval == 0)
				{
					cb.PdfDocument.NewPage();
					yPageStart = yTopMargin + YTop;
					yLocation = yPageStart - YOffset;
					Console.WriteLine("Other Paginate");
					retval = Rtf2Pdf.TextAt(cb, IParagraph, XOffset, yLocation, Width, 100);
				}
			}
			//Height = yLocation - retval;
			if (_PartsLeft != null && _PartsLeft.Count > 0) yPageStart = PartsLeft.ToPdf(cb, yPageStart, yTopMargin, yBottomMargin);
			if (_PartsRight != null && _PartsRight.Count > 0) yPageStart = PartsRight.ToPdf(cb, yPageStart, yTopMargin, yBottomMargin);
			if (_PartsBelow != null && _PartsBelow.Count > 0) yPageStart = PartsBelow.ToPdf(cb, yPageStart, yTopMargin, yBottomMargin);
			if (_PartsContainer != null && _PartsContainer.Count > 0) yPageStart = PartsContainer.ToPdf(cb, yPageStart, yTopMargin, yBottomMargin);
			return yPageStart;
		}


		public override float ToPdf(PdfContentByte cb, float yPageStart, float yTopMargin, float yBottomMargin)
		{
			float yLocation = yPageStart - YTopMost;
			int paginate = Paginate(yLocation, yTopMargin - yBottomMargin);
			switch (paginate)
			{
				case 1: // Break on High Level Step
					cb.PdfDocument.NewPage();
					yPageStart = yTopMargin + YTopMost;
					break;
				case 2: // Break within a Step
					cb.PdfDocument.NewPage();
					yPageStart = yTopMargin + YTopMost - 2 * _SixLinesPerInch;
					break;
			}
			yPageStart = ChildrenAbove.ToPdf(cb, yPageStart, yTopMargin, yBottomMargin);
			yPageStart = ChildrenLeft.ToPdf(cb, yPageStart, yTopMargin, yBottomMargin);
			yPageStart = ParagraphToPdf(cb, yPageStart, yTopMargin, yBottomMargin);
			yPageStart = ChildrenRight.ToPdf(cb, yPageStart, yTopMargin, yBottomMargin);
			yPageStart = ChildrenBelow.ToPdf(cb, yPageStart, yTopMargin, yBottomMargin);
			return yPageStart;
		}

		private int Paginate(float yLocation, float yPageSize)
		{
			if (YSize <= yLocation) return 0; // Don't Paginate if there is enough room
			if (MyItemInfo.IsRNOPart && MyParent.XOffset < XOffset) return 0; // Don't paginate on an RNO to the right
			if (MyItemInfo.IsHigh && YSize < yPageSize) return 1; // Paginate on High Level Steps
			if (yLocation > yPageSize / 2) return 0;
			return 2;
		}
	}
	public partial class vlnHeader : vlnPrintObject
	{
		public override float ToPdf(PdfContentByte cb, float yPageStart, float yTopMargin, float yBottomMargin)
		{
			float yLocation = yPageStart - YOffset;
			Rtf2Pdf.TextAt(cb, IParagraph, XOffset, yLocation, HeaderWidth, 100);
			return yPageStart;
		}
	}

	public partial class vlnTab : vlnPrintObject
	{
		public override float ToPdf(PdfContentByte cb, float yPageStart, float yTopMargin, float yBottomMargin)
		{
			float yLocation = yPageStart - YOffset;
			Rtf2Pdf.TextAt(cb, IParagraph, XOffset, yLocation, TabWidth, 100);
			return yPageStart;
		}
	}
	public partial class vlnBox : vlnPrintObject
	{
		public override float ToPdf(PdfContentByte cb, float yPageStart, float yTopMargin, float yBottomMargin)
		{
			return yPageStart;
		}
	}
	public partial class vlnChangeBar : vlnPrintObject
	{
		public override float ToPdf(PdfContentByte cb, float yPageStart, float yTopMargin, float yBottomMargin)
		{
			float yLocation = yPageStart - YOffset;
			float yAdj = 3;
			cb.SaveState();
			cb.SetColorStroke(Color.GREEN);
			cb.SetLineWidth(1);
			cb.MoveTo(XOffset, yLocation-yAdj);			// combination yStart and YOffset
			cb.LineTo(XOffset, yLocation - MyParent.Height-yAdj);
			cb.Stroke();
			cb.RestoreState();
			return yPageStart;
		}
	}
	public partial class vlnRNOSeparator : vlnPrintObject
	{
		public override float ToPdf(PdfContentByte cb, float yPageStart, float yTopMargin, float yBottomMargin)
		{
			float yLocation = yPageStart - YOffset;
			Rtf2Pdf.TextAt(cb, IParagraph, XOffset, yLocation, Width, 100);
			return yPageStart;
		}
	}
	public partial class vlnMacro : vlnPrintObject
	{
		public override float ToPdf(PdfContentByte cb, float yPageStart, float yTopMargin, float yBottomMargin)
		{
			float yLocation = yPageStart - YOffset;
			MyContentByte = cb;
			System.Drawing.Color push = PrintOverride.SvgColor;
			PrintOverride.SvgColor = PrintOverride.TextColor == System.Drawing.Color.Empty ? System.Drawing.Color.Black : PrintOverride.TextColor ;
			if (MyPageHelper != null && MyPageHelper.MySvg != null)
				MyPageHelper.MySvg.DrawMacro(MacroDef, XOffset, yLocation, cb);
			PrintOverride.SvgColor = push;
			return yPageStart;
		}
	}
}