package GameTest1;

import java.awt.DisplayMode;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Window;
import java.awt.image.BufferStrategy;
import java.awt.image.BufferedImage;

import javax.swing.JFrame;

public class ScreenManager {
	private GraphicsDevice vc;
	//gives vc access to screen
	public ScreenManager(){
		GraphicsEnvironment e = GraphicsEnvironment.getLocalGraphicsEnvironment();
		vc = e.getDefaultScreenDevice();
	}
	//get all the compatible display modes
	public DisplayMode[] getCompatibleDisplayModes(){
		return vc.getDisplayModes();
	}
	//comapres dm stuff
	public DisplayMode findFirstCompatibleMode(DisplayMode modes[]){
		DisplayMode goodmodes[] = vc.getDisplayModes();
		for(int x = 0; x < modes.length; x++){
			for(int y = 0; y < goodmodes.length; y++){
				if(displayModesMatch(modes[x], goodmodes[y])){
					return modes[x];
				}
			}
		}
		return null;
	}
	//get current display mode
	public DisplayMode getCurrentDisplayMode(){
		return vc.getDisplayMode();
	}
	//check if two modes match eachother
	public boolean displayModesMatch(DisplayMode m1, DisplayMode m2){
		if(m1.getWidth() != m2.getWidth() || m1.getHeight() != m2.getHeight()){
			return false;
		}
		if(m1.getBitDepth() != DisplayMode.BIT_DEPTH_MULTI && m2.getBitDepth() != DisplayMode.BIT_DEPTH_MULTI && m1.getBitDepth() != m2.getBitDepth()){
			return false;
		}
		if(m1.getRefreshRate() != DisplayMode.REFRESH_RATE_UNKNOWN && m2.getRefreshRate() != DisplayMode.REFRESH_RATE_UNKNOWN && m1.getRefreshRate() != m2.getRefreshRate()){
			return false;
		}
		return true;
	}
	//make frame full screen
	public void setFullScreen(DisplayMode dm){
		JFrame f = new JFrame();
		f.setUndecorated(true);
		f.setIgnoreRepaint(true);
		f.setResizable(false);
		vc.setFullScreenWindow(f);

		if(dm != null && vc.isDisplayChangeSupported()){
			try{
				vc.setDisplayMode(dm);
			}catch(Exception ex){}
		}
		f.createBufferStrategy(2);

	}
	//setting graphics object to this
	public Graphics2D getGraphics(){
		Window w = vc.getFullScreenWindow();
		if(w != null){
			BufferStrategy s = w.getBufferStrategy();
			return (Graphics2D) s.getDrawGraphics();

		}else{
			return null;
		}
	}
	//updates display
	public void update(){
		Window w = vc.getFullScreenWindow();
		if(w != null){
			BufferStrategy s = w.getBufferStrategy();
			if(!s.contentsLost()){
				s.show();
			}
		}

	}
	//returns full screen window
	public Window getFullScreenWindow(){
		return vc.getFullScreenWindow();
	}
	//gets width of window
	public int getWidth(){
		Window w = vc.getFullScreenWindow();
		if(w != null){
			return w.getWidth();
		}else{
			return 0;
		}
	}
	//gets height of window
		public int getHeight(){
			Window w = vc.getFullScreenWindow();
			if(w != null){
				return w.getHeight();
			}else{
				return 0;
			}
		}
		//gets out of full screen
		public void restoreScreen(){
			Window w = vc.getFullScreenWindow();
			if(w!=null){
				w.dispose();
			}
			vc.setFullScreenWindow(null);
		}
		//create image compatible with monitor
		public BufferedImage createCompatibleImage(int w, int h, int t){
			Window win = vc.getFullScreenWindow();
			if(win != null){
				GraphicsConfiguration gc = win.getGraphicsConfiguration();
				return gc.createCompatibleImage(w, h, t);
			}
			return null;
		}
}