//*****************************
// Harry Goes Home.java: Applet
//*****************************

import java.applet.*;
import java.awt.*;
import java.lang.*;

public class harry extends Applet
{
   public Image Harry,Mine,Key,House,Grass,Fence,Footstep;
   public int harryx,harryy,mines,status;
   public boolean gotkey;
   public int land[][] = new int[30][20]; //0=grass, 1=footstep, 2=mine, 3=key, 4=house, 5=fence

	public void init()
	{
      int x,y;

      status = 0;
      gotkey = false;
      resize(600,500);

      Harry = getImage(getCodeBase(),"harry.gif");
      Mine = getImage(getCodeBase(),"mine.gif");
      Key = getImage(getCodeBase(),"key.gif");
      House = getImage(getCodeBase(),"house.gif");
      Grass = getImage(getCodeBase(),"grass.gif");
      Fence = getImage(getCodeBase(),"fence.gif");
      Footstep = getImage(getCodeBase(),"footstep.gif");

      for(y=0 ; y<20 ; y++) {
         for(x=0 ; x<30 ; x++) {
            land[x][y] = 0;
            if (Math.random() < 0.1) land[x][y] = 2;
            if (x == 0 || x == 29 || y == 0 || y == 19) land[x][y] =5;
         }
      }
      land[(int)(Math.random()*20)+5][10] = 3; //key
      land[(int)(Math.random()*20)+5][1] = 4; //house

      harryx = (int)(Math.random()*20)+5;
      harryy = 18;
      land[harryx][harryy] = 0;
   }

   public void update(Graphics g)
   {
      g.setColor(getBackground());
      g.fillRect(0,400,600,100);
      g.setColor(getForeground());
      paint(g);
   }

	public void paint(Graphics g)
	{
		int x,y;

      for(y=0 ; y<20 ; y++) {
         for(x=0 ; x<30 ; x++) {
            if (land[x][y] == 0 || land[x][y] == 2) g.drawImage(Grass,x*20,y*20,this);
            if (land[x][y] == 2 && status > 0) g.drawImage(Mine,x*20,y*20,this);
            else if (land[x][y] == 1) g.drawImage(Footstep,x*20,y*20,this);
            else if (land[x][y] == 3) g.drawImage(Key,x*20,y*20,this);
            else if (land[x][y] == 4) g.drawImage(House,x*20,y*20,this);
            else if (land[x][y] == 5) g.drawImage(Fence,x*20,y*20,this);
			}
		}
      g.drawImage(Harry,harryx*20,harryy*20,this);

      if (status == 0 && mines > 0) {
         g.drawString("There are " + mines + " mines next to you.",10,430);
      }
      else if (status == 1) {
         g.drawString("You have stood on a mine!!",10,450);
      }
      if (land[harryx][harryy] == 3) {
         g.drawString("You have got the key.",10,450);
      }
      if (land[harryx][harryy] == 4) {
         if (gotkey == true) {
            g.drawString("You have made it with the key!!!",10,450);
            status = 2;
         } else {
            g.drawString("You have not got the key!",10,450);
         }
      }
	}

	public void start()
   {
      repaint();
	}
	
	public boolean mouseDown(Event evt, int x, int y)
	{
      if (land[harryx][harryy] != 4) land[harryx][harryy] = 1;
      if (x < 200 && harryx > 1) harryx--;
      if (x > 400 && harryx < 28) harryx++;
      if (y < 150 && harryy > 1) harryy--;
      if (y > 350 && harryy < 18) harryy++;

      if(land[harryx][harryy] == 3) gotkey = true;
      if(land[harryx][harryy] == 2) status = 1;
      CalcMines();

      repaint();
		return true;
	}

   private void CalcMines()
   {
      int u,v;

      mines = 0;

      for(u=harryy-1 ; u<harryy+2 ; u++) {
         for(v=harryx-1 ; v<harryx+2 ; v++) {
            if (land[v][u] == 2 && (u == harryy || v == harryx)) mines++;
         }
      }
   }
}