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.Model;
using Itenso.Rtf.Support;
using System.IO;


namespace Volian.Print.Library
{
	public class Rtf2Pdf
	{
		private string _Rtf;

		public string Rtf
		{
			get { return _Rtf; }
			set { _Rtf = value; }
		}
		private string _FileName;

		public string FileName
		{
			get { return _FileName; }
			set { _FileName = value; }
		}
		public Rtf2Pdf(string rtf, string fileName)
		{
			_Rtf = rtf;
			_FileName = fileName;
		}
		public void Process()
		{
			Document document = new Document(PageSize.LETTER);
			PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(FileName, FileMode.Create));
			document.Open();
			// Open RTF Document
			IRtfDocument rtfDoc = RtfInterpreterTool.BuildDoc(Rtf);
			Rtf2iTextSharp rtf2IText = new Rtf2iTextSharp(rtfDoc);
			Paragraph para = rtf2IText.Convert();
			para.SetLeading(12F, 0);
			PdfContentByte cb = writer.DirectContent;
			SampleParagraphs(para, cb, 792-36, 252, 36);
			para.Add(new Chunk(" (continued)",para.Font));
			SampleParagraphs(para, cb, 792 - 36, 252, 324);
			// Close the document
			document.Close();
		}

		private static void SampleParagraphs(Paragraph para, PdfContentByte cb, float yTop, float width, float x)
		{
			while (yTop > 0)
			{
				float newYTop = TextAt(cb, para, x, yTop - 12F, width, 100,"");
				//Console.WriteLine("{0},{1},{2}", yTop, width, newYTop);
				width -= 16;
				yTop = newYTop;
			}
		}
		private static bool _PdfDebug = true;
		public static bool PdfDebug
		{
			get { return Rtf2Pdf._PdfDebug; }
			set { Rtf2Pdf._PdfDebug = value; }
		}
		private static System.Drawing.PointF _Offset = new System.Drawing.PointF(0, 0);
		public static System.Drawing.PointF Offset
		{
			get { return Rtf2Pdf._Offset; }
			set { Rtf2Pdf._Offset = value; }
		}
		public static float TextAt(PdfContentByte cb, Paragraph iParagraph, float x, float y, float width, float height, string debugText)
		{
			VlnSvgPageHelper _MyPageHelper = cb.PdfWriter.PageEvent as VlnSvgPageHelper;
			PdfLayer textLayer = _MyPageHelper == null ? null : _MyPageHelper.TextLayer;
			if (textLayer != null) cb.BeginLayer(textLayer);
			float left = x + Offset.X;
			float top = y + Offset.Y;
			float right = left + width;
			float bottom = top - height;
			ColumnText myColumnText = new ColumnText(cb);
			//myColumnText.SetSimpleColumn(left, top, left + width, top - height);
			myColumnText.SetSimpleColumn(left, top, left + width, 36); // Bottom margin
			//myColumnText.YLine -= 10;
			//float yOff = pp.Font.BaseFont.GetAscentPoint("Almg", pp.Font.Size);
			//myColumnText.YLine = -yOff;
			myColumnText.AddElement(iParagraph);  
			float pos = myColumnText.YLine;
			//myColumnText.UseAscender = true;// Adjusts to the top of the text box.
			// go processing it and if it fits, nothing to be processed is in mycolumntext.
			int status = myColumnText.Go(true); // Check to see if it will fit on the page.
			if (ColumnText.HasMoreText(status))
				return 0;// Won't fit return 0;
			myColumnText.YLine = pos;  // location on  page
			myColumnText.AddElement(iParagraph);  // add in paragraph
			myColumnText.Go(false);
			//float textHeight = pp.Leading * myColumnText.LinesWritten;
			//Console.WriteLine("Calculated Bottom {0}, YLine {1}", top - textHeight, myColumnText.YLine);
			//BoxText(cb, System.Drawing.Color.BurlyWood, left, top, left + width, top - height);
			//BoxText(canvas, System.Drawing.Color.CadetBlue, left, top, left + width, top - textHeight);
			if (textLayer != null) cb.EndLayer();

			if (PdfDebug)
				DrawPdfDebug(cb, System.Drawing.Color.CadetBlue, left, top, left + width, myColumnText.YLine, debugText);
			//Console.WriteLine("Lines = {0}", myColumnText.LinesWritten);
			return myColumnText.YLine;

		}
		private static void DrawPdfDebug(PdfContentByte cb, System.Drawing.Color sysColor, float left, float top, float right, float bottom, string debugText)
		{
			float yAdj = 3;
			cb.SaveState();
			VlnSvgPageHelper _MyPageHelper = cb.PdfWriter.PageEvent as VlnSvgPageHelper;
			PdfLayer debugLayer = _MyPageHelper == null ? null : _MyPageHelper.DebugLayer;
			if (debugLayer != null) cb.BeginLayer(debugLayer);
			cb.SetColorStroke(new Color(sysColor));
			cb.SetLineWidth(.1F);
			cb.MoveTo(left, top - yAdj);
			cb.LineTo(right, top - yAdj);
			cb.LineTo(right, bottom - yAdj);
			cb.LineTo(left, bottom - yAdj);
			cb.LineTo(left, top - yAdj);
			cb.Stroke();
			ColumnText ct = new ColumnText(cb);
			ct.SetSimpleColumn(left, 4 + top - yAdj, right, top - yAdj - 50);
			iTextSharp.text.Font font = FontFactory.GetFont("Arial", 2);
			Chunk chk = new Chunk(debugText, font);
			Phrase ph = new Phrase(chk);
			ct.AddElement(ph);
			cb.SetColorFill(new Color(sysColor));
			ct.Go();
			if (debugLayer != null) cb.EndLayer();
			cb.RestoreState();
		}


	}
}