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) // Don't ouput the Step Section title
			{
				retval = Rtf2Pdf.TextAt(cb, IParagraph, XOffset, yLocation, Width, 100, PdfDebugText);
				if (retval == 0)
				{
					cb.PdfDocument.NewPage();
					yPageStart = yTopMargin + YTop;
					yLocation = yPageStart - YOffset;
					//MyItemInfo.ItemID, YSize, yPageSize, yLocation
					Console.WriteLine("-1,'Yes','Forced Pagination',{0},{1},,{3},'{4}'", MyItemInfo.ItemID,YSize,0,yLocation,MyItemInfo.ShortPath);
					retval = Rtf2Pdf.TextAt(cb, IParagraph, XOffset, yLocation, Width, 100, PdfDebugText);
				}
			}
			//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;
		}
		private string PdfDebugText
		{
			get
			{
				return string.Format("ID={0} Type={1} TypeName='{2}' EveryNLines= {3}", MyItemInfo.ItemID, MyItemInfo.FormatStepType, MyItemInfo.FormatStepData.Type, MyItemInfo.FormatStepData.StepLayoutData.EveryNLines);
			}
		}
		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 yTopMargin, float yBottomMargin)
		{
			float yPageSize = yTopMargin - yBottomMargin;
			float yWithinMargins = yLocation - yBottomMargin;
			if (MyItemInfo.ItemID == 879) 
				Console.Write(",'Here'");
			if (MyItemInfo.IsStepSection) return 0; // Don't Paginate on a Step Section
			if (YSize <= yWithinMargins)
			{
				if(MyItemInfo.IsHigh)
					Console.WriteLine("1,'No','HLS will fit on page',{0},{1},{2}, {3}, {4},'{5}'", MyItemInfo.ItemID, YSize, yPageSize, yWithinMargins, (int)(100 * yWithinMargins / yPageSize), MyItemInfo.ShortPath);
				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)
			{
				if (YSize < yPageSize) // if the entire step can fit on one page, do a page break
				{
					Console.WriteLine("2,'Yes','HLS will fit on 1 Page',{0},{1},{2}, {3}, {4},'{5}'", MyItemInfo.ItemID, YSize, yPageSize, yWithinMargins, (int)(100 * yWithinMargins / yPageSize), MyItemInfo.ShortPath);
					return 1; // Paginate on High Level Steps
				}
				else // The entire step cannot fit go ahead and kick to the next page
				{
					if (yWithinMargins > yPageSize / 2)
					{
						// If High level Step will not fit, kick to the next page
						Console.WriteLine("3,'No','HLS will have to split anyway',{0},{1},{2}, {3}, {4},'{5}'", MyItemInfo.ItemID, YSize, yPageSize, yWithinMargins, (int)(100 * yWithinMargins / yPageSize), MyItemInfo.ShortPath);
						return 0;// Otherwise stay on this page
					}
					Console.WriteLine("3,'Yes','HLS will have to split',{0},{1},{2}, {3}, {4},'{5}'", MyItemInfo.ItemID, YSize, yPageSize, yWithinMargins, (int)(100 * yWithinMargins / yPageSize), MyItemInfo.ShortPath);
					return 1; // Paginate on High Level Steps
				}
			}
			if (yWithinMargins > yPageSize / 4)
			{
				Console.WriteLine("4,'No','Not Half way down the page',{0},{1},{2}, {3}, {4},'{5}'", MyItemInfo.ItemID, YSize, yPageSize, yWithinMargins, (int)(100 * yWithinMargins / yPageSize), MyItemInfo.ShortPath);
				return 0; // More than half way down the page 
			}
			//if (ChildrenBelow.Count > 0 &&  ChildrenBelow[0].YSize < yWithinMargins)
			//  return 0;
			Console.WriteLine("5,'Yes','At least half the page is filled',{0},{1},{2},{3}, {4},'{5}'", MyItemInfo.ItemID, YSize, yPageSize, yWithinMargins, (int)(100 * yWithinMargins / yPageSize), MyItemInfo.ShortPath);
			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;
			VlnSvgPageHelper _MyPageHelper = cb.PdfWriter.PageEvent as VlnSvgPageHelper;
			PdfLayer textLayer = _MyPageHelper == null ? null : _MyPageHelper.TextLayer;
			if (textLayer != null) cb.BeginLayer(textLayer);
			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;
			if (textLayer != null) cb.EndLayer();
			return yPageStart;
		}
	}
}