import java.awt.*;
import javax.swing.*;

public class WrappedImage
{
	private Image image;
	private int wW;
	private int wH;
	private boolean debug;
	
	public WrappedImage(Image img)
	{
		image = img;
		wW = img.getWidth(null);
		wH = img.getHeight(null);
		debug = false;
	}
	
	public WrappedImage(Image img, boolean debug)
	{
		image = img;
		wW = img.getWidth(null);
		wH = img.getHeight(null);
		this.debug = debug;
	}
	
	//draws the image with the given viewing width and height and where
	//(sX, sY) is the location of the ship within the world
	public void draw(Graphics g, int vW, int vH, int sX, int sY)
	{
		draw(g, 0, 0, vW, vH, sX, sY);
	}
	
	//draws the image with the given viewing width and height and where
	//(sX, sY) is the location of the ship within the world
	//(vX, vY) is the location of the viewing screen withint the full scren window
	public void draw(Graphics g, int vX, int vY, int vW, int vH, int sX, int sY)
	{
		int[] xDistances = new int[]{vW/2 - sX, sX, wW-sX, vW/2-(wW - sX)};
		int[] yDistances = new int[]{vH/2 - sY, sY, wH-sY, vH/2-(wH - sY)};
		
		if(xDistances[0] < 0)
			xDistances[0] = 0;
		if(xDistances[1] > vW/2)
			xDistances[1] = vW/2;
		if(xDistances[2] > vW/2)
			xDistances[2] = vW/2;
		if(xDistances[3] < 0)
			xDistances[3] = 0;
		
		if(yDistances[0] < 0)
			yDistances[0] = 0;
		if(yDistances[1] > vH/2)
			yDistances[1] = vH/2;
		if(yDistances[2] > vH/2)
			yDistances[2] = vH/2;
		if(yDistances[3] < 0)
			yDistances[3] = 0;
		
		int cummulativeX = 0;
		for(int i = 0; i < xDistances.length; i++)
		{
			int worldLocX = sX - vW/2;
			if(worldLocX < 0)
			   worldLocX += wW;
			
			int cummulativeY = 0;
			for(int j = 0; j < yDistances.length; j++)
			{
				int worldLocY = sY - vH/2;
				if(worldLocY < 0)
					worldLocY += wH;
			
				g.drawImage(image,
							vX + cummulativeX,	
							vY + cummulativeY, 
							vX + cummulativeX + xDistances[i], 
							vY + cummulativeY + yDistances[j],
							(worldLocX + cummulativeX) % wW,	
							(worldLocY + cummulativeY) % wH, 
							(worldLocX + cummulativeX) % wW + xDistances[i], 
							(worldLocY + cummulativeY) % wH + yDistances[j],
							null);
				
				if(debug)
				{
					((Graphics2D)g).setStroke(new BasicStroke(4));
					g.setColor(Color.BLACK);
					g.drawString(j + " " + i, vX + cummulativeX + 20, vY+cummulativeY + 20);
					g.drawRect(vX + cummulativeX,	
							   vY + cummulativeY, 
							   vX + cummulativeX + xDistances[i], 
							   vY + cummulativeY + yDistances[j]);
					((Graphics2D)g).setStroke(new BasicStroke(1));
				}
				
				
				cummulativeY += yDistances[j];
			}
			
			cummulativeX += xDistances[i];
		}
	}
}