using System;
using System.Collections.Generic;
using System.Text;
using iTextSharp.text;
using iTextSharp.text.pdf;
using Volian.Svg.Library;

namespace Volian.Print.Library
{
	public class PageCount
	{
		private bool _CanIncrement = true;
		public bool CanIncrement
		{
			get { return _CanIncrement; }
			set { _CanIncrement = value; }
		}
		private int Increment()
		{
			if (CanIncrement) Total++;
			CanIncrement = false;
			return Total;
		}
		private int _Total;
		public int Total
		{
			get { return _Total; }
			set { _Total = value; }
		}
		private string _FinalPageMessage;

		public string FinalPageMessage
		{
			get { return _FinalPageMessage; }
			set { _FinalPageMessage = value; }
		}
		private PageCountTemplates _MyTemplates; //  (for each page that has this key)
		internal PageCountTemplates MyTemplates
		{
			get 
			{
				if (_MyTemplates == null) _MyTemplates = new PageCountTemplates(); 
				return _MyTemplates;
			}
			set 
			{
				_MyTemplates = value; 
			}
		}
		public void DrawTemplates()
		{
			int cnt = 0;
			foreach (PageCountTemplate pct in MyTemplates)
			{
				cnt++;
				string fstr = pct.Text.Replace("{OF}", _Total.ToString());
				if (pct.Text.Contains("{TOCPAGE}"))
				{
					fstr = pct.Text.Replace("{TOCPAGE}", _Total.ToString());
				}
				if (fstr.Contains("{FINALPAGE}"))
				{
					fstr = fstr.Replace("{FINALPAGE}", (cnt == MyTemplates.Count) ? FinalPageMessage : "");
				}
				// use font from pct
				string fontFace = pct.MyFont.Name;
				int fontStyle = (pct.MyFont.Bold ? iTextSharp.text.Font.BOLD : 0) + (pct.MyFont.Italic ? iTextSharp.text.Font.ITALIC : 0);
				Font itextFont = Volian.Svg.Library.Svg.GetFont(fontFace, pct.MyFont.Size, fontStyle, pct.MyColor);
				ColumnText columnText = new ColumnText(pct.MyTemplate);
				float textSize = itextFont.BaseFont.GetWidthPoint(fstr, pct.MyFont.Size);
				float flly = itextFont.BaseFont.GetDescentPoint("g", pct.MyFont.Size);
				float lead = columnText.Leading;
				columnText.Alignment = pct.Alignment;
				Chunk chk = new Chunk(fstr, itextFont);
				float width = chk.GetWidthPoint();
				// justification:
				float left = 0;
				float right = width * 1.01F;
				switch (pct.Alignment)
				{
					case Element.ALIGN_CENTER:
						left = -.5F * width;
						right = .51F * width;
						break;
					case Element.ALIGN_RIGHT:
						left = -1.01F * width;
						right = 0;
						break;
				}
				pct.MyTemplate.BoundingBox = new Rectangle(left, 2 * flly, right, columnText.Leading); //2*flly account for descenders
				columnText.SetSimpleColumn(left, 0, right, columnText.Leading);
				columnText.SetText(new Phrase(chk));
				columnText.Go();
			}
		}
		public PdfTemplate AddToTemplateList(PdfWriter pdfWriter, string text, System.Drawing.Font myFont, int alignment, System.Drawing.Color color)
		{
			Increment();
			PageCountTemplate retTemplate = new PageCountTemplate(pdfWriter, text.Replace("{PAGE}",Total.ToString()), myFont, alignment, color);
			MyTemplates.Add(retTemplate);
			
			return retTemplate.MyTemplate;
		}
	}
	public class PageCounts : Dictionary<string, PageCount>
	{
		public bool CanIncrement
		{
			set 
			{
				foreach (PageCount pc in this.Values)
				{
					pc.CanIncrement = value;
				}
			}
		}
		public PdfTemplate AddToTemplateList(string key, PdfWriter pdfWriter, string text, System.Drawing.Font myFont, int alignment, System.Drawing.Color color)
		{
			if (!this.ContainsKey(key))
			{
				this.Add(key, new PageCount());
				if (key.StartsWith("TOC")) this[key].CanIncrement = false;
			}
			return (this[key].AddToTemplateList(pdfWriter, text, myFont, alignment,color));
		}
		public PdfTemplate AddToTemplateList(string key, PdfWriter pdfWriter, string text, string finalPageMessage, System.Drawing.Font myFont, int alignment, System.Drawing.Color color)
		{
			if (!this.ContainsKey(key)) this.Add(key, new PageCount());
			this[key].FinalPageMessage = finalPageMessage;
			return (this[key].AddToTemplateList(pdfWriter, text, myFont, alignment, color));
		}
		public void DrawTemplates()
		{
			foreach (PageCount pc in this.Values)
			{
				pc.DrawTemplates();
			}
		}
	}

	public class PageCountTemplate
	{
		private string _Text;
		public string Text				// "Page 1 of {OF}"
		{
			get { return _Text; }
			set { _Text = value; }
		}
		private System.Drawing.Font _MyFont;
		public System.Drawing.Font MyFont
		{
			get { return _MyFont; }
			set { _MyFont = value; }
		}
		private int _Alignment;		// iTextSharp Element.<XYZ>
		public int Alignment
		{
			get { return _Alignment; }
			set { _Alignment = value; }
		}
		private System.Drawing.Color _MyColor;
		public System.Drawing.Color MyColor
		{
			get { return _MyColor; }
			set { _MyColor = value; }
		}
		private PdfTemplate _MyTemplate;
		public PdfTemplate MyTemplate
		{
			get { return _MyTemplate; }
			set { _MyTemplate = value; }
		}
		public PageCountTemplate(PdfWriter pdfWriter, string text, System.Drawing.Font myFont, int alignment, System.Drawing.Color color)
		{
			// Create Template can be called with a small, i.e. 1, width/height because when
			// it is actually drawn, the bounding box overrides the CreateTemplate values.
			_MyTemplate = pdfWriter.DirectContent.CreateTemplate(1, 1);
			_Text = text;
			_MyFont = myFont;
			_MyColor = color;
			_Alignment = alignment;
		}
	}
	public class PageCountTemplates : List<PageCountTemplate>
	{
	}
}