import java.io.*;
import java.awt.*;
import java.applet.Applet;
import java.awt.event.*;
import java.util.*;
import java.lang.*;
import java.awt.geom.Line2D;
import java.lang.Math;
public class kulgur extends Applet implements KeyListener{

	double x,y,samm=10;

	Vector	plangud = new Vector();
	Plank	pp;

	public kulgur()throws IOException{
		TeePlangud();
		addKeyListener(this);
	}


	public void paint(Graphics g){

		JoonistaRuut(g);
		
		JoonistaPlangud(g);
	}
	
/* Kontrollib puutumist plankudega */

	public boolean Kontrolli(int suund, double xx,double yy){
		boolean vas=true;
		double xplus=0,yplus=0;
		if(suund==KeyEvent.VK_LEFT){xplus=10;}
		if(suund==KeyEvent.VK_RIGHT){xplus=0;}
		if(suund==KeyEvent.VK_UP){yplus=10;}
		if(suund==KeyEvent.VK_DOWN){yplus=0;}
		for (Enumeration e = plangud.elements(); e.hasMoreElements();){
			pp = (Plank)e.nextElement();
			double kaugus = Math.round(Line2D.ptLineDist(pp.GetX1(),pp.GetY1(),pp.GetX2(),pp.GetY2(),xx+xplus,yy+yplus));
			if (kaugus==0 || kaugus < 10){
				if ((suund==KeyEvent.VK_LEFT || suund==KeyEvent.VK_RIGHT) && (yy>=pp.GetY1() && (yy+10) <= pp.GetY2())){
					vas = false;
					break;
				}
				if ((suund==KeyEvent.VK_UP || suund==KeyEvent.VK_DOWN) && xx>=pp.GetX1() && (xx+10) <= pp.GetX2()){
					vas = false;
					break;
				}
			}
		}
		return vas;
	}

	public void keyPressed(KeyEvent e){
		int kood=e.getKeyCode();
		if(kood==KeyEvent.VK_LEFT){
			if (Kontrolli(kood,x-samm,y)){
				x-=samm;
			}
		}
		if(kood==KeyEvent.VK_RIGHT){
			if (Kontrolli(kood,x+samm,y)){
				x+=samm;
			}
		}
		if(kood==KeyEvent.VK_UP){
			if (Kontrolli(kood,x,y-samm)){
				y-=samm;
			}
		}
		if(kood==KeyEvent.VK_DOWN){
			if (Kontrolli(kood,x,y+samm)){
				y+=samm;
			}
		}
		repaint();
	}

	public void keyReleased(KeyEvent e){}
	public void keyTyped(KeyEvent e){}

/* Joonistab liikuva ruudu */

	public void JoonistaRuut(Graphics g){
		g.drawOval(PI(x),PI(y),10,10);
		g.setColor(Color.green);
		g.fillOval(PI(x)+1,PI(y)+1,9,9);
	}

/* Loeb vektorist kõikide plankude koordinaadid ja joonistab need */
	
	public void JoonistaPlangud(Graphics g){
		for (Enumeration e = plangud.elements(); e.hasMoreElements();){
			pp = (Plank)e.nextElement();
			g.setColor(Color.black);
			g.drawLine((int)pp.GetX1(),(int)pp.GetY1(),(int)pp.GetX2(),(int)pp.GetY2());
		}
 	}

	
/*Loeb failidest plankude andmed!*/
	
	public void TeePlangud() throws IOException{
		try{
			BufferedReader sisse=new BufferedReader(new FileReader("plangud.txt"));
			String rida=sisse.readLine();
			while(rida!=null){
				StringTokenizer koordinaadid = new StringTokenizer(rida,":");
				double x1=-1,x2=-1,y1=-1,y2=-1;
				int pos=0;
				while (koordinaadid.hasMoreTokens()) {
					pos++;
					switch (pos){
					case 1:
						x1=Integer.parseInt(koordinaadid.nextToken());
						break;
					case 2:
						y1=Integer.parseInt(koordinaadid.nextToken());
						break;
					case 3:
						x2=Integer.parseInt(koordinaadid.nextToken());
						break;
					case 4:
						y2=Integer.parseInt(koordinaadid.nextToken());
						break;
					}
					if(x1!=-1&&x2!=-1&&y1!=-1&&y2!=-1){
						plangud.addElement(new Plank(x1,x2,y1,y2));
						Log(" > Tehti uus Plank(" + x1 + "," + x2 + "," + y1 + "," + y2 + ")");
					}
				}				
				rida=sisse.readLine();
			}
			sisse.close();
		}catch(Exception FailiViga){}
	}

//* Kirjutab systemisse */
	
	public void Log(String txt){
		System.out.println(txt);
	}

//* MAIN */

	public static void main(String args[])throws IOException{
		Frame FrameKulgur = new Frame("Kulgur");
		FrameKulgur.add(new kulgur());
		FrameKulgur.setResizable(false);
		FrameKulgur.setSize(600,500);
		FrameKulgur.setLocation(100,100);
		FrameKulgur.show();
		FrameKulgur.addWindowListener(new Raamikuular());
	}

};

//* Et akent saaks sulgeda ka :) */

class Raamikuular extends WindowAdapter{
	public void windowClosing(WindowEvent e){
		System.out.println("Raam suleti");
		System.exit(0);
	}
}

//* Klass Plank, kus hoitakse plankude koordinaate*/

class Plank{
	double x1,x2,y1,y2;
	public Plank(double x1,double x2,double y1,double y2){
		this.x1=x1;
		this.x2=x2;
		this.y1=y1;
		this.y2=y2;
	}
	double GetX1(){return this.x1;}
	double GetX2(){return this.x2;}
	double GetY1(){return this.y1;}
	double GetY2(){return this.y2;}
};