using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using iTextSharp.text.pdf;
using iTextSharp.text;
using VEPROMS.CSLA.Library;

namespace Volian.Print.Library
{
	public class vlnChangeBarMessage
	{
		private float _ParentX;
		public float ParentX
		{
			get { return _ParentX; }
			set { _ParentX = value; }
		}
		private string _Message;
		public string Message
		{
			get { return _Message; }
			set { _Message = value; }
		}
		private static int _UniqueMessageId = 0;
		public static int UniqueMessageId
		{
			get { return vlnChangeBarMessage._UniqueMessageId++; }
			set { vlnChangeBarMessage._UniqueMessageId = value; }
		}
		private int _MessageId = UniqueMessageId;
		public int MessageId
		{
			get { return _MessageId; }
			set { _MessageId = value; }
		}
		public vlnChangeBarMessage(float parentx, string msg)
		{
			_ParentX = parentx;
			_Message = msg;
		}
	}
	public partial class vlnChangeBar : vlnPrintObject
	{
		private bool _HasChangeBar;
		public bool HasChangeBar
		{
			get { return _HasChangeBar; }
			set { _HasChangeBar = value; }
		}
		protected float _YChangeBarBottom;
		public float YChangeBarBottom
		{
			get
			{
				if (_YChangeBarBottom == 0F) _YChangeBarBottom = _YOffset - _Height;
				return _YChangeBarBottom;
			}
			set
			{
				_YChangeBarBottom = value;
				_Height = _YOffset - _YChangeBarBottom;
			}
		}
		private SortedDictionary<float, vlnChangeBarMessage> _Messages;
		public SortedDictionary<float, vlnChangeBarMessage> Messages
		{
			get { return _Messages; }
			set { _Messages = value; }
		}
		private int _MessageAlignment;
		public int MessageAlignment
		{
			get { return _MessageAlignment; }
			set { _MessageAlignment = value; }
		}
		private float _YExtendLine = 4.75F;
		public float YExtendLine
		{
			get { return _YExtendLine; }
			set {_YExtendLine = value; }
		}
		public float YChangeBarBottomExtend
		{
			get {return YChangeBarBottom - YExtendLine; }
		}
		public vlnChangeBar(PdfContentByte cb, vlnParagraph parent, float xoff, float yoff, int msgAlignment)
		{
			// for grids, a y adjustment is made to match 16bit output, see the variable 'GridTopAdjust'.  Take this
			// adjustment into account for the change bar.  6.5 positioned the change bar to match 16bit output.
			if (parent.MyItemInfo.MyContent.MyGrid != null) yoff -= 6.5F;
			MyContentByte = cb;
			_XOffset = xoff;
			_YOffset = yoff;
			_MyParent = parent;
			_Messages = new SortedDictionary<float, vlnChangeBarMessage>();
			// if there is an RNO separator, add the separator's height in too.
			_Height = parent.Height * MyPageHelper.YMultiplier + (parent.MyItemInfo.IsFigure?SixLinesPerInch:0);
			foreach (vlnPrintObject vpo in parent.PartsBelow)
			{
				if (vpo is vlnRNOSeparator)
				{
					// see if any of children don't have changebar
					if ((vpo as vlnRNOSeparator).ExtendChangeBar)
						_YExtendLine = (vpo.Height + vpo.YOffset - (parent.Height + parent.YOffset)) * MyPageHelper.YMultiplier;
				}
			}
			foreach (vlnPrintObject vph in parent.PartsAbove)
			{
				if (vph is vlnHeader)
				{
					string sep = parent.MyItemInfo.MyHeader.CleanText;
					vlnHeader tmp = vph as vlnHeader;
					// the separator must exist and the previous must have a change bar.

					if ((sep != "") && (tmp.Text == sep) && parent.MyItemInfo.MyPrevious != null && parent.MyItemInfo.MyPrevious.HasChangeBar)
					{
						vlnParagraph prev = MyPageHelper.MyParagraphs[parent.MyItemInfo.MyPrevious.ItemID];
						float delta = parent.YOffset - prev.YOffset;
						_YOffset += delta;
						_Height += delta;
					}

				}
			}
			_MessageAlignment = msgAlignment;
		}
		public override string ToString()
		{
			return string.Format("vlnChangeBar: X={0} Y={1} H={2} B={3} ID={4}", XOffset, YOffset, Height, YChangeBarBottom, MyParent.MyItemInfo.ItemID);
		}
		public override float ToPdf(PdfContentByte cb, float yPageStart, float yTopMargin, float yBottomMargin)
		{
			cb.SaveState();
			VlnSvgPageHelper _MyPageHelper = cb.PdfWriter.PageEvent as VlnSvgPageHelper;
			PdfLayer textLayer = _MyPageHelper == null ? null : _MyPageHelper.TextLayer;
			if (textLayer != null) cb.BeginLayer(textLayer);
			float yAdj = -3.75F; //0.5F;
			float xAdj = 3F;
			//cb.SetColorStroke(Color.GREEN);
			// TODO: Should default to black
			iTextSharp.text.Color changeBarColor = new iTextSharp.text.Color(PrintOverride.OverrideChangeBarColor(System.Drawing.Color.Black));
			cb.SetColorStroke(changeBarColor);
			cb.SetLineWidth(.5F);
			cb.MoveTo(XOffset + xAdj, YOffset - yAdj);			// combination yStart and YOffset
			cb.LineTo(XOffset + xAdj, YChangeBarBottomExtend - yAdj - 1);
			cb.Stroke();
			DebugPdf(cb, XOffset + xAdj - 1.5F, YOffset - yAdj + 4);
			DebugPdf(cb, XOffset + xAdj - 1.5F, YChangeBarBottomExtend - yAdj - 1);
			if (Messages != null)
			{
				// Loop through messages for this change bar.  The first message is the bottom-most, which is always put out.
				// Working up, if the current message is the same as the one below it, don't put it out.
				string lastMsg = null;
				foreach (KeyValuePair<float, vlnChangeBarMessage> kvp in Messages)
				{
					float yBottom = (float)System.Convert.ToDouble(kvp.Key);
					vlnChangeBarMessage vcbm = (vlnChangeBarMessage)kvp.Value;
					if (lastMsg != vcbm.Message)
					{
						//If change bar is on left side, subtract off size of text & some constant number 
						// y is yoffset - size of paragraph
						iTextSharp.text.Font iFont = Volian.Svg.Library.VolianPdf.GetFont(new System.Drawing.Font("Letter Gothic", 5.5F));

						Chunk chk = new Chunk(vcbm.Message.IndexOf(@"\n") > -1 ? vcbm.Message.Substring(0, vcbm.Message.IndexOf(@"\n")) : vcbm.Message, iFont);
						Paragraph myparagraph = new Paragraph(chk);
						if (vcbm.Message.IndexOf(@"\n") > -1)
						{
							myparagraph.Add(Chunk.NEWLINE);
							myparagraph.Add(new Chunk(vcbm.Message.Substring(vcbm.Message.IndexOf(@"\n") + 2, vcbm.Message.Length - vcbm.Message.IndexOf(@"\n") - 2), iFont));
						}
						myparagraph.Alignment = MessageAlignment;
						myparagraph.Leading = iFont.Size;
						float w = vlnPrintObject.GetTableWidth(cb, myparagraph, MyParent.MyItemInfo.MyDocStyle.Layout.PageWidth);
						float h = vlnPrintObject.GetParagraphHeight(cb, myparagraph, w);
						cb.SetColorFill(changeBarColor);
						Rtf2Pdf.TextAt(cb, myparagraph, XOffset + xAdj - Rtf2Pdf.Offset.X + 3, yBottom + h - Rtf2Pdf.Offset.Y + 2.7F, w, h, "", yBottomMargin);
						lastMsg = vcbm.Message;
					}
				}
			}
			if (textLayer != null) cb.EndLayer();
			cb.RestoreState();
			return yPageStart;
		}
	}
}