using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;



namespace Psychlops
{

	public class Canvas : Drawable
	{
		//public static System.Windows.Controls.Image default_buffer_frame;
		public static System.Windows.Controls.UserControl default_panel;
		public static System.Windows.Controls.Canvas default_api_canvas;
		public static WriteableBitmap default_buffer;
		//WriteableBitmap buffer;
		//System.Windows.Controls.Image instance;
		System.Windows.Controls.Canvas api_canvas;
		System.Windows.Controls.UserControl panel;
		System.Windows.Shapes.Rectangle back_panel;
		System.Windows.Media.SolidColorBrush back_panel_color;

		public Canvas(int wid, int hei)
		{
			panel = default_panel;
			api_canvas = default_api_canvas;
			//instance = default_buffer_frame;
			initialize(wid, hei);
		}
		public Canvas(int wid, int hei, System.Windows.Controls.Canvas apicnvs,  System.Windows.Controls.UserControl system)
		{
			panel = system;
			api_canvas = apicnvs;
			//instance = target;
			initialize(wid, hei);
		}
		protected void initialize(int wid, int hei)
		{
			//instance.Width = wid;
			//instance.Height = hei;
			//instance.Source = buffer;
			//buffer = new WriteableBitmap((int)instance.Width, (int)instance.Height);
			//default_buffer = buffer;
			api_canvas.Width = wid;
			api_canvas.Height = hei;
			api_canvas.MouseMove += Mouse.Canvas_MousePos;
			api_canvas.MouseLeftButtonDown += Mouse.Canvas_LDown;
			api_canvas.MouseLeftButtonUp += Mouse.Canvas_LUp;
			api_canvas.MouseWheel += Mouse.Canvas_MouseWheel;
			panel.KeyDown += Keyboard.Canvas_KeyDown;
			panel.KeyUp += Keyboard.Canvas_KeyUp;
			Mouse._prime = api_canvas;
			Main.drawable = this;

			back_panel = new System.Windows.Shapes.Rectangle();
			back_panel.Width = wid;
			back_panel.Height = hei;
			back_panel_color = new SolidColorBrush();
			back_panel.Fill = back_panel_color;
		}
		public Point getCenter()
		{
			return new Point(api_canvas.Width / 2.0, api_canvas.Height / 2.0, 0);
		}

		public void clear()
		{
			//buffer.Clear(Color.black);
			clear(Color.black);
		}
		public void clear(Color col)
		{
			api_canvas.Children.Clear();
			back_panel_color.Color = col;
			api_canvas.Children.Add(back_panel);
			//buffer.Clear(col);
		}

		public void pix(int x, int y, Color col)
		{
			//buffer.SetPixel(x, y, col);
		}

		#region static initializer
		/*
		static System.Windows.Shapes.Line api_line;
		static System.Windows.Shapes.Path api_curve;
		static System.Windows.Shapes.Rectangle api_rect;
		static System.Windows.Shapes.Ellipse api_ellipse;
		static System.Windows.Shapes.Polygon api_polygon;
		static System.Windows.Shapes.Polyline api_polyline;
		static System.Windows.Media.Color api_color;
		static System.Windows.Media.SolidColorBrush api_fill;
		static System.Windows.Media.SolidColorBrush api_stroke;
		static System.Windows.Media.TranslateTransform api_translation;
		*/
		protected static System.Collections.Generic.Dictionary<int, System.Windows.FontWeight> FONT_WEIGHT_BRIDGE;
		protected static System.Collections.Generic.Dictionary<Font.Style, System.Windows.FontStyle> FONT_STYLE_BRIDGE;
		protected static System.Collections.Generic.Dictionary<Letters.HorizontalAlign, TextAlignment> LETTERS_H_ALIGN_BRIDGE;
		static Canvas()
		{
			FONT_WEIGHT_BRIDGE = new System.Collections.Generic.Dictionary<int, System.Windows.FontWeight>();
			FONT_WEIGHT_BRIDGE.Add((int)Font.Weight.normal, System.Windows.FontWeights.Normal);
			FONT_WEIGHT_BRIDGE.Add((int)Font.Weight.bold, System.Windows.FontWeights.Bold);
			FONT_STYLE_BRIDGE = new System.Collections.Generic.Dictionary<Font.Style, System.Windows.FontStyle>();
			FONT_STYLE_BRIDGE.Add(Font.Style.normal, System.Windows.FontStyles.Normal);
			FONT_STYLE_BRIDGE.Add(Font.Style.italic, System.Windows.FontStyles.Italic);
			FONT_STYLE_BRIDGE.Add(Font.Style.oblique, System.Windows.FontStyles.Italic);
			LETTERS_H_ALIGN_BRIDGE = new System.Collections.Generic.Dictionary<Letters.HorizontalAlign, TextAlignment>();
			LETTERS_H_ALIGN_BRIDGE.Add(Letters.HorizontalAlign.TEXT_ALIGN_LEFT, TextAlignment.Left);
			LETTERS_H_ALIGN_BRIDGE.Add(Letters.HorizontalAlign.TEXT_ALIGN_CENTER, TextAlignment.Center);
			LETTERS_H_ALIGN_BRIDGE.Add(Letters.HorizontalAlign.TEXT_ALIGN_RIGHT, TextAlignment.Right);
			LETTERS_H_ALIGN_BRIDGE.Add(Letters.HorizontalAlign.NOT_SPECIFIED, TextAlignment.Left);

			/*
			api_line = new System.Windows.Shapes.Line();
			api_curve    = new System.Windows.Shapes.Path();
			api_rect     = new System.Windows.Shapes.Rectangle();
			api_ellipse  = new System.Windows.Shapes.Ellipse();
			api_polygon  = new System.Windows.Shapes.Polygon();
			api_polyline = new System.Windows.Shapes.Polyline();
			api_color       = new System.Windows.Media.Color();
			api_fill        = new System.Windows.Media.SolidColorBrush();
			api_stroke      = new System.Windows.Media.SolidColorBrush();
			api_translation = new System.Windows.Media.TranslateTransform();
			*/
		}
		#endregion

		public void line(Line drawee, Color col)
		{
			//buffer.DrawLine((int)drawee.begin.x, (int)drawee.begin.y, (int)drawee.end.x, (int)drawee.end.y, col);
			var zapi_shape = new System.Windows.Shapes.Line();
			var zapi_fill = new System.Windows.Media.SolidColorBrush();
			zapi_shape.X1 = (int)drawee.begin.x;
			zapi_shape.Y1 = (int)drawee.begin.y;
			zapi_shape.X2 = (int)drawee.end.x;
			zapi_shape.Y2 = (int)drawee.end.y;
			zapi_fill.Color = col;
			zapi_fill.Opacity = 1.0;
			zapi_shape.Stroke = zapi_fill;
			zapi_shape.StrokeThickness = 1;
			api_canvas.Children.Add(zapi_shape);
			//System.Windows.Controls.Canvas.SetLeft(zapi_shape, drawee.left);
			//System.Windows.Controls.Canvas.SetTop(zapi_shape, drawee.top);
		}
		public void rect(Rectangle drawee, Color col)
		{
			//buffer.DrawRectangle((int)drawee.v1.x, (int)drawee.v1.y, (int)drawee.v2.x, (int)drawee.v2.y, col);

			var zapi_shape = new System.Windows.Shapes.Rectangle();
			var zapi_fill = new System.Windows.Media.SolidColorBrush();
			zapi_shape.Width = drawee.width;
			zapi_shape.Height = drawee.height;
			zapi_fill.Color = col;
			zapi_shape.Fill = zapi_fill;
			api_canvas.Children.Add(zapi_shape);
			System.Windows.Controls.Canvas.SetLeft(zapi_shape, drawee.left);
			System.Windows.Controls.Canvas.SetTop(zapi_shape, drawee.top);
		}
		public void ellipse(Ellipse drawee, Color col)
		{
			//buffer.DrawEllipse((int)(drawee.datum.x - drawee.xdiameter / 2), (int)(drawee.datum.y - drawee.ydiameter / 2), (int)(drawee.datum.x + drawee.xdiameter / 2), (int)(drawee.datum.y + drawee.ydiameter / 2), col);

			var zapi_shape = new System.Windows.Shapes.Ellipse();
			var zapi_fill = new System.Windows.Media.SolidColorBrush();
			zapi_shape.Width = drawee.width;
			zapi_shape.Height = drawee.height;
			zapi_fill.Color = col;
			zapi_shape.Fill = zapi_fill;
			api_canvas.Children.Add(zapi_shape);
			System.Windows.Controls.Canvas.SetLeft(zapi_shape, drawee.left);
			System.Windows.Controls.Canvas.SetTop(zapi_shape, drawee.top);
		}
		public void polygon(Polygon drawee, Color col)
		{
			/*
			int[] ps = new int[drawee.vertices.Count];
			buffer.DrawPolyline(ps, col);
			*/
			var zapi_shape = new System.Windows.Shapes.Polygon();
			var zapi_fill = new System.Windows.Media.SolidColorBrush();
			int i = 0;
			foreach (Point p in drawee.vertices)
			{
				zapi_shape.Points.Add(p);
			}
			zapi_fill.Color = col;
			zapi_shape.Fill = zapi_fill;
			api_canvas.Children.Add(zapi_shape);
			System.Windows.Controls.Canvas.SetLeft(zapi_shape, drawee.datum.x);
			System.Windows.Controls.Canvas.SetTop(zapi_shape, drawee.datum.y);
		}
		public void letters(Letters drawee, Color col)
		{
			//var zapi_shape = new System.Windows.Documents.Glyphs();
			var zapi_shape = new System.Windows.Controls.TextBlock();
			var zapi_fill = new System.Windows.Media.SolidColorBrush();
			zapi_shape.Width = width;
			zapi_shape.Height = height;
			zapi_shape.Text = drawee.str;
			//zapi_shape.FontFamily = ;
			zapi_shape.FontSize = drawee.font.size;
			zapi_shape.FontStyle = FONT_STYLE_BRIDGE[drawee.font.style];
			zapi_shape.FontWeight = FONT_WEIGHT_BRIDGE[drawee.font.weight];
			zapi_shape.TextAlignment = LETTERS_H_ALIGN_BRIDGE[drawee.align];
			zapi_fill.Color = col;
			zapi_shape.Foreground = zapi_fill;
			api_canvas.Children.Add(zapi_shape);
			double left = 0;
			switch(drawee.align)
			{
				case Letters.HorizontalAlign.TEXT_ALIGN_LEFT: break;
				case Letters.HorizontalAlign.TEXT_ALIGN_CENTER: left = zapi_shape.Width/2; break;
				case Letters.HorizontalAlign.TEXT_ALIGN_RIGHT: left = zapi_shape.Width; break;
			}
			System.Windows.Controls.Canvas.SetLeft(zapi_shape, drawee.datum.x - left);
			System.Windows.Controls.Canvas.SetTop(zapi_shape, drawee.datum.y - drawee.font.size);
		}
		public void image(Image drawee)
		{
			//buffer.Blit(drawee.datum, drawee.buffer, drawee.self_rect, Colors.White, WriteableBitmapExtensions.BlendMode.None);
			var zapi_shape = new System.Windows.Controls.Image();
			zapi_shape.Source = drawee.buffer;
			api_canvas.Children.Add(zapi_shape);
			System.Windows.Controls.Canvas.SetLeft(zapi_shape, drawee.datum.x);
			System.Windows.Controls.Canvas.SetTop(zapi_shape, drawee.datum.y);
		}


		public void msg(string str, double x, double y) { msg(str, x, y, Color.white); }
		public void msg(string str, double x, double y, Color col)
		{
			var let = new Letters(str);
			let.locate(x, y);
			this.letters(let, col);
		}
		public void var<Type>(Type val, double x, double y) { msg(val.ToString(), x, y, Color.white); }
		public void var<Type>(Type val, double x, double y, Color col) { msg(val.ToString(), x, y, col); }


		public void flip()
		{
			//buffer.Invalidate();
		}

		public double width { get { return api_canvas.Width; } }
		public double height { get { return api_canvas.Height; } }

	}

}