/*	Written by Ramses Smeyers (rsmeyers@khk.org).
	Copyright (C) 2000 Ramses Smeyers

	This software may be used and distributed according
	to the terms of the GNU Public License, incorporated
	herein by reference.

	tux, tux_g and bsd taken from xtux 
		by David Lawrence (philaw@camtech.net.au)
	bill taken from xbill 
		by Brian Wellington and Matias Duarte
		images prepared by Dolphin (wim@hal.theo.kuleuven.ac.be)
*/

#define NOLOOP
//#define LOOP
#undef LOOP

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


public class thread extends Thread
{
	private int type,direction,frame,movement;
	private int xpos, ypos,borderX,borderY,borderB,borderH;;
	private Graphics g;
	private Image images [][];
	private animation Animation;
	private double r1;
	private World world;
	private boolean go,back,other,exitthis;
	private int directionbackup;
	
	public thread (Graphics g,World world,Image[][] images,int type, int direction,int frame ,int xpos,int ypos, int borderX, int borderY, int borderB, int borderH,int movement)
	{		this.type = type;
			this.direction = direction;
			this.frame = frame;
			this.g = g;
			this.xpos = xpos;
			this.ypos = ypos;
			this.images = images;
			this.borderX = borderX;
			this.borderY = borderY;
			this.borderB = borderB;
			this.borderH = borderH;
			this.movement = movement;
			this.world = world;
			
			Animation= new animation(g,world,images, type,direction,frame,xpos,ypos,borderX,borderY,borderB,borderH,movement);
			Animation.teken();
	};
	public void run(){
		#if LOOP
		if (type==0 || type = 2) {
			while (true){
				switch(direction){
				case 0:	go = Animation.checkRight();
						if (go) Animation.goRight();
						break;
				case 1:	go = Animation.checkUp();
						if (go) Animation.goUp();
						break;
				case 2:	go = Animation.checkDown();
						if (go) Animation.goDown();
						break;
				case 3:	go = Animation.checkLeft();
						if (go) Animation.goLeft();
						break;
				}
				
			}
		}
		else{
		#endif
			r1=Math.random();
			r1 = 4*r1;
			direction = (int)r1;
			Animation.setDirection(direction);
			while (true){
				go = false;
				switch(direction){
				case 0:	go = Animation.checkRight();
						if (go) Animation.goRight();
						break;
				case 1:	go = Animation.checkUp();
						if (go) Animation.goUp();
						break;
				case 2:	go = Animation.checkDown();
						if (go) Animation.goDown();
						break;
				case 3:	go = Animation.checkLeft();
						if (go) Animation.goLeft();
						break;
				}
				directionbackup = direction;	

				other=false;
				if (go){
					switch(direction){
					case 0:	if (richtingCheck(1) || richtingCheck(2)) other=true;
							break;
					case 1:	if (richtingCheck(3) || richtingCheck(0)) other=true;
							break;
					case 2:	if (richtingCheck(3) || richtingCheck(0)) other=true;
							break;
					case 3:	if (richtingCheck(1) || richtingCheck(2)) other=true;
							break;
					}
				}
					
				if (other) {
					while (true){
						r1=Math.random();
						r1 = 4*r1;
						direction = (int)r1;
						Animation.setDirection(direction);
						exitthis = false;
						switch(directionbackup){
							case 0:	if (direction != 3 && richtingCheck(direction)) exitthis=true;
									break;
							case 1: if (direction != 2 && richtingCheck(direction)) exitthis=true;
									break;
							case 2:	if (direction != 1 && richtingCheck(direction)) exitthis=true;
									break;
							case 3: if (direction != 0 && richtingCheck(direction)) exitthis=true;
									break;
						}
						if (exitthis==true) break;
					}
				}
			
				if (!go){		

					// the for lus is for fall back onnly when
					// AI character is locked
					for (int i=1;i<10;i++){
						r1=Math.random();
						r1 = 4*r1;
						direction = (int)r1;
						Animation.setDirection(direction);
						exitthis = false;
						switch(directionbackup){
							case 0:	if (direction != 0 && direction != 3 && richtingCheck(direction)) exitthis=true;
									break;
							case 1: if (direction != 1 && direction != 2 && richtingCheck(direction)) exitthis=true;
									break;
							case 2:	if (direction != 2 && direction != 1 && richtingCheck(direction)) exitthis=true;
									break;
							case 3: if (direction != 3 && direction != 0 && richtingCheck(direction)) exitthis=true;
									break;
						}
						if (exitthis==true) break;
					}
				}
			}
		#if LOOP
		}
		#endif
	}
	public boolean richtingCheck(int direction){
		switch(direction){
		case 0:	back = Animation.checkRight();
				break;
		case 1:	back = Animation.checkUp();
				break;
		case 2:	back = Animation.checkDown();
				break;
		case 3:	back = Animation.checkLeft();
				break;
		}
		return back;
	}
	#if LOOP
	public void setDirection (int direction){
		this.direction = direction;
		Animation.setDirection(direction);
	}
	public void teken(){
		Animation.teken();
	}
	public void goLeft(){
		Animation.goLeft();
	}
	#endif
	
	
}