/*
  Copyright (C) 2002, 2004, 2005, 2006, 2007 Jeroen Frijters
  Copyright (C) 2006 Active Endpoints, Inc.
  Copyright (C) 2006 - 2010 Volker Berlin (i-net software)

  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the authors be held liable for any damages
  arising from the use of this software.

  Permission is granted to anyone to use this software for any purpose,
  including commercial applications, and to alter it and redistribute it
  freely, subject to the following restrictions:

  1. The origin of this software must not be misrepresented; you must not
     claim that you wrote the original software. If you use this software
     in a product, an acknowledgment in the product documentation would be
     appreciated but is not required.
  2. Altered source versions must be plainly marked as such, and must not be
     misrepresented as being the original software.
  3. This notice may not be removed or altered from any source distribution.

  Jeroen Frijters
  jeroen@frijters.net 

*/

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Text;
using System.Drawing.Imaging;
using System.IO;
using System.Runtime.InteropServices;
using System.Threading;
using System.Windows.Forms;
using System.ComponentModel;
using System.Reflection;
using System.Text;
using java.awt.datatransfer;
using java.awt.image;
using java.awt.peer;
using java.net;
using java.util;

namespace ikvm.awt
{
    /// <summary>
    /// This class has some static convertion methods from Java to C# objects
    /// </summary>
    class J2C
    {

        internal static Color ConvertColor(java.awt.Color color)
        {
            return color == null ? Color.Empty : Color.FromArgb(color.getRGB());
        }

        internal static Bitmap ConvertImage(java.awt.Image img)
        {
            if (img is BufferedImage)
            {
                return ((BufferedImage)img).getBitmap();
            }
            if (img is NetVolatileImage)
            {
                return ((NetVolatileImage)img).bitmap;
            }
            if (img is sun.awt.image.ToolkitImage)
            {
                return ((sun.awt.image.ToolkitImage)img).getImageRep().getBitmap();
            }
            if (img is NoImage)
            {
                return null;
            }
            Console.WriteLine(new System.Diagnostics.StackTrace());
            throw new NotImplementedException("Image class:" + img.GetType().FullName);
        }

        internal static PointF ConvertPoint(java.awt.geom.Point2D point)
        {
            return new PointF((float)point.getX(), (float)point.getY());
        }

        internal static RectangleF ConvertRect(java.awt.geom.Rectangle2D rect)
        {
            return new RectangleF((float)rect.getX(), (float)rect.getY(), (float)rect.getWidth(), (float)rect.getHeight());
        }

        internal static Rectangle ConvertRect(java.awt.Rectangle rect)
        {
            return new Rectangle(rect.x, rect.y, rect.width, rect.height);
        }

        /// <summary>
        /// Create a rounded rectangle using lines and arcs
        /// </summary>
        /// <param name="x">upper left x coordinate</param>
        /// <param name="y">upper left y coordinate</param>
        /// <param name="w">width</param>
        /// <param name="h">height</param>
        /// <param name="arcWidth">the horizontal diameter of the arc at the four corners</param>
        /// <param name="arcHeight">the vertical diameter of the arc at the four corners</param>
        /// <returns></returns>
		internal static GraphicsPath ConvertRoundRect(int x, int y, int w, int h, int arcWidth, int arcHeight)
        {
            GraphicsPath gp = new GraphicsPath();
            bool drawArc = arcWidth > 0 && arcHeight > 0;
            int a = arcWidth / 2;
            int b = arcHeight / 2;
			gp.AddLine(x + a, y, x + w - a, y);
            if (drawArc)
            {
                gp.AddArc(x + w - arcWidth, y, arcWidth, arcHeight, 270, 90); //upper right arc
            }
            gp.AddLine(x + w, y + b, x + w, y + h - b);
            if (drawArc)
            {
                gp.AddArc(x + w - arcWidth, y + h - arcHeight, arcWidth, arcHeight, 0, 90); //lower right arc
            }
            gp.AddLine(x + w - a, y + h, x + a, y + h);
            if (drawArc)
            {
                gp.AddArc(x, y + h - arcHeight, arcWidth, arcHeight, 90, 90);//lower left arc
            }
            gp.AddLine(x, y + h - b, x, y + b);
            if (drawArc)
            {
                gp.AddArc(x, y, arcWidth, arcHeight, 180, 90); //upper left arc
            }
            gp.CloseFigure();

            return gp;
        }

        internal static GraphicsPath ConvertShape(java.awt.Shape shape)
        {
            java.awt.geom.PathIterator iterator = shape.getPathIterator(null);
            GraphicsPath gp = new GraphicsPath();
            gp.FillMode = (FillMode)iterator.getWindingRule();
            float[] coords = new float[6];
            float x = 0;
            float y = 0;
            while (!iterator.isDone())
            {
                int type = iterator.currentSegment(coords);
                switch (type)
                {
                    case java.awt.geom.PathIterator.__Fields.SEG_MOVETO:
                        x = coords[0];
                        y = coords[1];
                        gp.StartFigure();
                        break;
                    case java.awt.geom.PathIterator.__Fields.SEG_LINETO:
                        gp.AddLine(x, y, coords[0], coords[1]);
                        x = coords[0];
                        y = coords[1];
                        break;
                    case java.awt.geom.PathIterator.__Fields.SEG_QUADTO:
                        gp.AddBezier(x, y, coords[0], coords[1], coords[0], coords[1], coords[2], coords[3]);
                        x = coords[2];
                        y = coords[3];
                        break;
                    case java.awt.geom.PathIterator.__Fields.SEG_CUBICTO:
                        gp.AddBezier(x, y, coords[0], coords[1], coords[2], coords[3], coords[4], coords[5]);
                        x = coords[4];
                        y = coords[5];
                        break;
                    case java.awt.geom.PathIterator.__Fields.SEG_CLOSE:
                        gp.CloseFigure();
                        break;
                }
                iterator.next();
            }
            return gp;
        }

        internal static LineJoin ConvertLineJoin(int join)
        {
            switch (join)
            {
                case java.awt.BasicStroke.JOIN_MITER:
                    return LineJoin.Miter;
                case java.awt.BasicStroke.JOIN_ROUND:
                    return LineJoin.Round;
                case java.awt.BasicStroke.JOIN_BEVEL:
                    return LineJoin.Bevel;
                default:
                    Console.WriteLine("Unknown line join type:" + join);
                    return LineJoin.Miter;
            }
        }

        internal static Matrix ConvertTransform(java.awt.geom.AffineTransform tx)
        {
            return new Matrix(
                (float)tx.getScaleX(),
                (float)tx.getShearY(),
                (float)tx.getShearX(),
                (float)tx.getScaleY(),
                (float)tx.getTranslateX(),
                (float)tx.getTranslateY());
        }

        internal static FontFamily CreateFontFamily(String name)
        {
            String name2 = name == null ? null : name.ToLower();
			switch (name2)
			{
				case "monospaced":
				case "courier":
					return FontFamily.GenericMonospace;
				case "serif":
					return FontFamily.GenericSerif;
				case "sansserif":
				case "dialog":
				case "dialoginput":
				case null:
				case "default":
					return FontFamily.GenericSansSerif;
				default:
					try
					{
						return new FontFamily(name);
					}
					catch (ArgumentException)
					{
						return FontFamily.GenericSansSerif;
					}
			}
        }

		private static FontStyle ConvertFontStyle(int style)
		{
			FontStyle fs = FontStyle.Regular;
			if ((style & java.awt.Font.BOLD) != 0)
			{
				fs |= FontStyle.Bold;
			}
			if ((style & java.awt.Font.ITALIC) != 0)
			{
				fs |= FontStyle.Italic;
			}
			return fs;
		}

        internal static Font ConvertFont(String name, int style, float size)
		{
            if (size <= 0)
            {
                size = 1;
            }
            FontFamily family = CreateFontFamily(name);
            FontStyle fontStyle = ConvertFontStyle(style);
            if (!family.IsStyleAvailable(fontStyle))
            {
                //Some Fonts (for example Aharoni) does not support Regular style. This throw an exception else it is not documented.
                if(family.IsStyleAvailable(FontStyle.Regular)){
                    fontStyle = FontStyle.Regular;
                }else
                if(family.IsStyleAvailable(FontStyle.Bold)){
                    fontStyle = FontStyle.Bold;
                }else
                if(family.IsStyleAvailable(FontStyle.Italic)){
                    fontStyle = FontStyle.Italic;
                }else
                if(family.IsStyleAvailable(FontStyle.Bold | FontStyle.Italic)){
                    fontStyle = FontStyle.Bold | FontStyle.Italic;
                }
            }
            return new Font(family, size, fontStyle, GraphicsUnit.Pixel);
        }


		internal static Region ConvertRegion(sun.java2d.pipe.Region shape)
		{
			if (shape.isRectangular())
			{
				int x = shape.getLoX();
				int y = shape.getLoY();
				int w = shape.getHiX() - x;
				int h = shape.getHiY() - y;
				if (w < 0 || h < 0)
				{
					return new Region();
				}
				else
				{
					return new Region(new Rectangle(x, y, w, h));
				}
			}
			else
			{
				using (GraphicsPath path = new GraphicsPath())
				{
					sun.java2d.pipe.SpanIterator iter = shape.getSpanIterator();
					int[] box = new int[4];
					while (iter.nextSpan(box))
					{
						path.AddRectangle(new Rectangle(box[0], box[1], box[2] - box[0], box[3] - box[1]));
					}
					return new Region(path);
				}
			}
		}

        internal static string ConvertGlyphVector(java.awt.font.GlyphVector gv) {
            int count = gv.getNumGlyphs();
            char[] text = new char[count];
            for (int i = 0; i < count; i++) {
                text[i] = (char)gv.getGlyphCode(i);
            }
            return new string(text);
        }

    }

    /// <summary>
    /// This class has some static convertion function from C# to Java objects
    /// </summary>
    class C2J
    {
        internal static java.awt.geom.AffineTransform ConvertMatrix(Matrix matrix)
        {
            float[] elements = matrix.Elements;
            return new java.awt.geom.AffineTransform(elements);
        }

        internal static java.awt.Rectangle ConvertRectangle(RectangleF rec)
        {
            return new java.awt.Rectangle((int)rec.X, (int)rec.Y, (int)rec.Width, (int)rec.Height);
        }

        internal static java.awt.Color ConvertColor(Color color)
        {
            return color == Color.Empty ? null : new java.awt.Color(color.ToArgb(),true);
        }

        internal static java.awt.Font ConvertFont(Font font)
        {
            float size = font.Size;
            if (font.Unit != GraphicsUnit.Pixel)
            {
                size = font.SizeInPoints * java.awt.Toolkit.getDefaultToolkit().getScreenResolution() / 72;
            }
            java.awt.Font jFont = new java.awt.Font(font.Name, (int)font.Style, (int)size);
            if (jFont.getSize2D() != size)
            {
                jFont = jFont.deriveFont(size);
            }
            //TODO performance we should set the .NET Font, we can do it with an aditional constructor.
            return jFont;
        }

        internal static java.awt.Shape ConvertShape(GraphicsPath path) {
            java.awt.geom.GeneralPath shape = new java.awt.geom.GeneralPath();
            shape.setWindingRule((int)path.FillMode);
            for (int i = 0; i < path.PointCount; i++) {
                byte pathType = path.PathTypes[i];
                int type = pathType & 0x07;
                PointF point = path.PathPoints[i];
                switch (type) {
                    case 0:
                        // Indicates that the point is the start of a figure. 
                        shape.moveTo(point.X, point.Y);
                        break;
                    case 1:
                        // Indicates that the point is one of the two endpoints of a line. 
                        shape.lineTo(point.X, point.Y);
                        break;
                    case 3:
                        // Indicates that the point is an endpoint or control point of a cubic B�zier spline. 
                        PointF point2 = path.PathPoints[++i];
                        PointF point3 = path.PathPoints[++i];
                        shape.curveTo(point.X, point.Y, point2.X, point2.Y, point3.X, point3.Y);
                        pathType = path.PathTypes[i];
                        break;
                    default:
                        Console.WriteLine("Unknown GraphicsPath type: " + type);
                        break;
                }
                if ((pathType & 0x80) > 0) {
                    // Specifies that the point is the last point in a closed subpath (figure).
                    shape.closePath();
                }
            }
            return shape;
        }
    }
}