/*********************************************************************************************
 * Copyright 2010 - Volian Enterprises, Inc. All rights reserved.
 * Volian Enterprises - Proprietary Information - DO NOT COPY OR DISTRIBUTE
 *********************************************************************************************/
using System;
using System.Xml;
using System.Drawing;
using System.Text;

namespace VG
{
	/// <summary>
	/// VG is the class representing vector graphics. It provides objects for:
	///		Line, Rectangle, Text, Ellipse, Bitmaps, etc.
	///	VG provides constructors for these objects from coordinate system locations
	///	    (such as starting x,y ending x,y, etc), xml and svg.
	///	VG data is stored in TWIPS (1440 per inch)
	/// </summary>

	// Temporary page class to store portrait/landscape, Left Margin, Vertical offset, etc
	public class Page
	{
		private bool _Portrait = true;
		public bool Portrait
		{
			get { return _Portrait; }
			set { _Portrait = value; }
		}
		private float _LeftMargin = 0;
		public float LeftMargin
		{
			get { return _LeftMargin; }
			set { _LeftMargin = value; }
		}
		private float _TopMargin = 0;
		public float TopMargin
		{
			get { return _TopMargin; }
			set { _TopMargin = value; }
		}
		private float _RightMargin = 0;
		public float RightMargin
		{
			get { return _RightMargin; }
			set { _RightMargin = value; }
		}
		private float _BottomMargin = 0;
		public float BottomMargin
		{
			get { return _BottomMargin; }
			set { _BottomMargin = value; }
		}
		public Page(bool portrait, float leftMargin, float topMargin, float rightMargin, float bottomMargin)
		{
			_Portrait = portrait;
			_LeftMargin = leftMargin;
			_TopMargin = topMargin;
			_RightMargin = rightMargin;
			_BottomMargin = bottomMargin;
		}
		public Page(bool portrait, float leftMargin, float topMargin)
		{
			_Portrait = portrait;
			_LeftMargin = leftMargin;
			_TopMargin = topMargin;
		}
	}
	public class VG
	{
		private static Brush _BlackBrush = Brushes.Black;
		public static Brush BlackBrush
		{
			get { return _BlackBrush; }
			set { _BlackBrush = value; }
		}
		private static Color _BlackColor = Color.Black;
		public static Color BlackColor
		{
			get { return _BlackColor; }
			set { _BlackColor = value; _BlackBrush = new SolidBrush(value); }
		}
		// Values of vector graphics items are stored as twips (1440 twips in an inch)
		public int cx;
		public int cy;
		public int dx;
		public int dy;
		public float lnwid;
		public Page pg;
		public bool MoveAbsolute;		// TODO: Not sure what to do with this.
		public VG()
		{
			cx = 0;
			cy = 0;
			dx = 0;
			dy = 0;
			MoveAbsolute = false;
			pg = null;
		}
		public VG(int sx, int sy, int ex, int ey, bool ima, Page ipg)
		{
			cx = sx;
			cy = sy;
			dx = ex;
			dy = ey;
			MoveAbsolute = ima;
			pg = ipg;
		}
		public float ToPoints(float twip)
		{
			float r = ((float)twip) * 0.05f;
			return r;
		}
		public void UpdatePageInfo(Page pa)
		{
			pg.LeftMargin = pa.LeftMargin;
			pg.Portrait = pa.Portrait; // RHM 20081003 - This had been pg.portrait=pg.portrait
			pg.TopMargin = pa.TopMargin; // RHM 20081003 - This had been pg.VertOffset=pg.VertOffset
		}
		public string AddRTFBUI(string origStr, string bold, string underline, string italics)
		{
			if (bold == "" && underline == "" && italics == "") return origStr;
			StringBuilder sb = new StringBuilder();
			if (bold == "bold") sb.Append("{\\b");
			if (underline == "underline") sb.Append("{\\u");
			if (italics == "italics") sb.Append("{\\i");
			sb.Append(" ");
			sb.Append(origStr);
			if (bold == "bold") sb.Append("}");
			if (underline == "underline") sb.Append("}");
			if (italics == "italics") sb.Append("}");
			return sb.ToString();
		}
		public static Pen CreatePen(Color color, float wid, float scale)
		{
			Pen pn;
			float scaleWid = wid * scale;
			float colorFraction = (float)Math.Sqrt(scaleWid);
			if (scaleWid < .5F)
			{
				//Console.WriteLine("Width = {0}", wid);
				int R1 = (int)(colorFraction * color.R);
				int R2 = (int)((1 - colorFraction) * Color.White.R);
				int G1 = (int)(colorFraction * color.G);
				int G2 = (int)((1 - colorFraction) * Color.White.G);
				int B1 = (int)(colorFraction * color.B);
				int B2 = (int)((1 - colorFraction) * Color.White.B);
				pn = new Pen(Color.FromArgb(R1 + R2, G1 + G2, B1 + B2), scaleWid);
				//pn = new Pen(color, wid*wid);
			}
			else
				pn = new Pen(color, scaleWid);
			return pn;
		}
	}
	public class VG_Line : VG
	{
		// Line is defined as starting & ending points.
		public VG_Line(int sx, int sy, int ex, int ey, int w, Page ipg)
		{
			cx = sx;
			cy = sy;
			dx = ex;
			dy = ey;
			lnwid = w;
			pg = ipg;
		}

		public VG_Line(XmlElement svg, Page ipg)
		{
			cx = System.Convert.ToInt32(svg.GetAttribute("x1"));
			cy = System.Convert.ToInt32(svg.GetAttribute("y1"));
			dx = System.Convert.ToInt32(svg.GetAttribute("x2"));
			dy = System.Convert.ToInt32(svg.GetAttribute("y2"));
			lnwid = System.Convert.ToInt32(svg.GetAttribute("stroke-width"));
			pg = ipg;
		}
		public void Draw(IVGOutput vgOutput)
		{
			float startx = pg.Portrait ? (cx + pg.LeftMargin) : (pg.TopMargin + cy);
			float starty = pg.Portrait ? (cy + pg.TopMargin) : (pg.LeftMargin - cx);
			float endx = pg.Portrait ? (dx + pg.LeftMargin) : (pg.TopMargin + dy);
			float endy = pg.Portrait ? (dy + pg.TopMargin) : (pg.LeftMargin - dx);
			Pen pn = VG.CreatePen(VG.BlackColor, ToPoints(lnwid), vgOutput.Scale);
			vgOutput.DrawLine(pn, ToPoints(startx), ToPoints(starty), ToPoints(endx), ToPoints(endy));
		}
	}
	public class VG_Rect : VG
	{
		// Rectangle is defined as starting point & length/width
		public VG_Rect(int sx, int sy, int ex, int ey, int w, Page ipg)
		{
			cx = sx;
			cy = sy;
			dx = ex;
			dy = ey;
			lnwid = w;
			pg = ipg;
		}
		public VG_Rect(XmlElement svg, Page ipg)
		{
			cx = System.Convert.ToInt32(svg.GetAttribute("x"));
			cy = System.Convert.ToInt32(svg.GetAttribute("y"));
			dx = System.Convert.ToInt32(svg.GetAttribute("width"));
			dy = System.Convert.ToInt32(svg.GetAttribute("height"));
			lnwid = System.Convert.ToInt32(svg.GetAttribute("stroke-width"));
			pg = ipg;
		}
		public void Draw(IVGOutput vgOutput)
		{
			Pen pn = new Pen(VG.BlackBrush, ToPoints(lnwid));

			float startx = pg.Portrait ? (cx + pg.LeftMargin) : (pg.TopMargin + cy);
			float starty = pg.Portrait ? (cy + pg.TopMargin) : (pg.LeftMargin - cx);
			float endx = pg.Portrait ? dx : dy;
			float endy = pg.Portrait ? dy : dx;
			RectangleF rc = new RectangleF(ToPoints(startx), ToPoints(starty), ToPoints(endx), ToPoints(endy));
			vgOutput.DrawRectangle(pn, rc);
		}
	}
	public class VG_Image : VG
	{
		private int Scale;
		private string FileName;
		// Image is defined as starting point, scale factor (defaults to 1) & image file name
		public VG_Image(int sx, int sy, int iscale, string fname)
		{
			cx = sx;
			cy = sy;
			Scale = 1;
			FileName = fname;
		}
		public VG_Image(XmlElement svg, Page ipg)
		{
			cx = System.Convert.ToInt32(svg.GetAttribute("x"));
			cy = System.Convert.ToInt32(svg.GetAttribute("y"));
			Scale = 1;
			if (svg.HasAttribute("scale")) Scale = System.Convert.ToInt32(svg.GetAttribute("scale"));
			FileName = svg.GetAttribute("bname");
			pg = ipg;
		}
		public void Draw(IVGOutput vgOutput)
		{
			Pen pn = new Pen(VG.BlackBrush, lnwid);
			Bitmap bm = new Bitmap(FileName);
			RectangleF rc = new RectangleF();
			rc.Height = ToPoints((bm.Height * Scale) * 4.8f);
			rc.Width = ToPoints((bm.Width * Scale) * 4.8f);
			rc.X = ToPoints(pg.LeftMargin + cx);
			rc.Y = ToPoints(pg.TopMargin + cy);
			// TODO: grfx.DrawImage(bm, rc, ContentAlignment.MiddleCenter, ImageSizeModeEnum.Scale);
		}
	}
	public class VG_Ellipse : VG
	{
		// Ellipse (circle) is defined by a bounding rectangle specified by a coordinate pair, a width, and a height
		public VG_Ellipse(int sx, int sy, int ex, int ey, int w, Page ipg)
		{
			cx = sx;
			cy = sy;
			dx = ex;
			dy = ey;
			lnwid = w;
			pg = ipg;
		}
		public VG_Ellipse(XmlElement svg, Page ipg)
		{
			cx = System.Convert.ToInt32(svg.GetAttribute("cx"));
			cy = System.Convert.ToInt32(svg.GetAttribute("cy"));
			dx = System.Convert.ToInt32(svg.GetAttribute("rx"));
			dy = System.Convert.ToInt32(svg.GetAttribute("ry"));
			lnwid = System.Convert.ToInt32(svg.GetAttribute("stroke-width"));
			pg = ipg;
		}
		public void Draw(IVGOutput vgOutput)
		{
			Pen pn = new Pen(VG.BlackBrush, ToPoints(lnwid));
			vgOutput.DrawEllipse(pn, ToPoints(pg.LeftMargin + cx), ToPoints(pg.TopMargin + cy), ToPoints(dx), ToPoints(dy));
		}
	}
	public class VG_Text : VG
	{
		private string FontName;
		private int FontSize;
		private string Bold;
		private string Underline;
		private string Italics;
		private string Text;
		// Text is defined by a starting location, attributes & the string
		public VG_Text(int sx, int sy, int fs, string txt, string fn, string ibold, string iunder, string iitalics, Page ipg)
		{
			cx = sx;
			cy = sy;
			FontSize = fs;
			FontName = fn;
			Text = txt;
			Bold = ibold;
			Underline = iunder;
			Italics = iitalics;
			pg = ipg;
			// TODO: The following were in the 16-bit code - we may need to use these, wait and see
			//			strokeWidth = stroke;
			//			strokeWidthBold = strokebold;
			//			ULOffset = UnderlineOffset;
			//			ULWidth = UnderlineWidth;
		}
		public VG_Text(XmlElement svg, Page ipg)
		{
			cx = System.Convert.ToInt32(svg.GetAttribute("x"));
			cy = System.Convert.ToInt32(svg.GetAttribute("y"));
			FontSize = System.Convert.ToInt32(svg.GetAttribute("font-size"));
			Bold = svg.GetAttribute("font-weight");
			Underline = svg.GetAttribute("text-decoration");
			Italics = svg.GetAttribute("font-style");
			FontName = svg.GetAttribute("font-family");
			Text = svg.InnerText;
			pg = ipg;
		}
		public void Draw(IVGOutput vgOutput)
		{
			// TODO: Font myfont = new Font(FontName, (FontSize*9)/10);
			Font myfont = new Font(FontName, FontSize * vgOutput.FontSizeAdjust); // TODO: Trying 80%
			RectangleF rc = new RectangleF();
			// the returned value from c1 grfx code is already in points,
			// so need to convert the size.
			rc.Size = vgOutput.MeasureString(Text, myfont); // TODO: 500 or pagewidth, or what
			//rc.Size = grfx.MeasureString(Text, myfont, 500); // TODO: 500 or pagewidth, or what
			rc.X = ToPoints(pg.LeftMargin + cx);
			rc.Y = ToPoints(pg.TopMargin + cy) - FontSize;
			rc.Height *= 1.0000001F;  // Small factor to make text visible.
			// add bold, underline & italics for entire object.
			// TODO: string rtfout = AddRTFBUI(Text, Bold, Underline, Italics);
			//using(Pen pn = new Pen(Color.DarkBlue, .1F))
			//	grfx.DrawRectangle(pn, rc.X,rc.Y,rc.Width,rc.Height);
			vgOutput.DrawString(Text, myfont, VG.BlackBrush, rc);
			//grfx.DrawString(Text, myfont, VG.BlackBrush, rc);
		}
	}
	public class VG_Arc : VG
	{
		public Single sweepAngle;
		public Single startAngle;
		public float stX, stY;
		public float rWid, rHgt;
		// Arc is defined by a bounding rectangle specified by a coordinate pair, a width, and a height
		public VG_Arc(float sx, float sy, float width, float hight, float stAngle, float swpAngle, int w, Page ipg)
		{
			if (width > 0)
			{
				stX = sx;
				rWid = width;
			}
			else
			{
				stX = sx + width;
				rWid = -width;
			}
			if (hight > 0)
			{
				stY = sy;
				rHgt = hight;
			}
			else
			{
				stY = sy + hight;
				rHgt = -hight;
			}
			startAngle = stAngle;
			//			startAngle = 90;
			sweepAngle = swpAngle;
			//			sweepAngle = -45;
			lnwid = w;
			pg = ipg;
		}
//#if DEBUG

		//public static int iColor = 0;
		//public Color[] myColors = { Color.Red, Color.Green, Color.OrangeRed, Color.Cyan, Color.Orange, Color.Blue, Color.Yellow, Color.Indigo, Color.YellowGreen, Color.Violet  };
		////public Color[] myColors ={ Color.Red, Color.Orange, Color.Yellow, Color.Green, Color.Blue, Color.BlueViolet, Color.Violet };
//#endif
		public void Draw(IVGOutput vgOutput)
		{
//#if DEBUG
//      Pen pn = new Pen(myColors[iColor % myColors.Length], ToPoints(lnwid));
			//iColor++;
			//if (iColor >= myColors.Length) iColor = 0;
//#else
			Pen pn = new Pen(VG.BlackBrush, ToPoints(lnwid));
//#endif

			float startx = pg.Portrait ? (stX + pg.LeftMargin) : (pg.TopMargin + stY);
			float starty = pg.Portrait ? (stY + pg.TopMargin) : (pg.LeftMargin - stX);
			RectangleF rc = new RectangleF(ToPoints(startx), ToPoints(starty), ToPoints(rWid), ToPoints(rHgt));
			//Console.WriteLine("{0},'{1}',{2},{3},{4},{5},{6},{7}", iColor, pn.Color, rc.X, rc.Y, rc.Width, rc.Height, startAngle, sweepAngle);
			//if (iColor == 7 || iColor == 8) return;
			//if (iColor == 6) return;
			//if (iColor == 4 || iColor == 6)
			//{
			//  using (Pen lightPen = new Pen(myColors[iColor % myColors.Length], .01F))
			//{
			//  vgOutput.DrawEllipse(lightPen, rc.X, rc.Y, rc.Width, rc.Height);
			//  float xc = rc.X + (rc.Width / 2);
			//  float yc = rc.Y + (rc.Height / 2);
			//  vgOutput.DrawEllipse(lightPen, xc - .5F, yc - .5F, 1F, 1F);
			//}
			//}
			if (sweepAngle > 0)
				vgOutput.DrawArc(pn, rc, startAngle, sweepAngle);
			else
				vgOutput.DrawArc(pn, rc, startAngle + sweepAngle, -sweepAngle);
		}

	}
}