import awb.*;
import java.awt.*;
import java.awt.event.*;

public class Plague extends java.applet.Applet implements ActionListener
{   TextField boardF;
    IntField InfF, ImmF, rateF;
    Button setup, go;
    LifeForm population[];
    int popnum, i, j, m, size, Inf, Imm, rate, iInc, first, day;
    String board, wellness;
    String A[];


    public void init()
    {   InfF = new IntField(10);
        ImmF = new IntField(10);
        rateF = new IntField(10);
        boardF = new TextField(70);
        // specify a monospaced font. (proportional spacing is bad here)
        boardF.setFont(new Font("Monospaced", Font.BOLD, 12));
        A = new String[60];
        setup = new Button("Setup");
        go = new Button("Next Day");
        population = new LifeForm[60];
        add(setup);
        add(InfF);
        add(ImmF);
        add(rateF);
        add(go);
        add(boardF);
        go.addActionListener(this);
        setup.addActionListener(this);
        size = 60;
    }

    public void actionPerformed(ActionEvent event)
    {
        Object cause = event.getSource();
        if (cause == setup)
        {
            Inf = InfF.getInt();
            Imm = ImmF.getInt();
	    rate = rateF.getInt();
            i = 0;
            while (i < size)
	    {   population[i] = new LifeForm(Inf,Imm);
                i = i + 1;
            }
            population[30].infect();
            day = 1;
            board = "day " + day + " ";
            i = 0;
            while (i < size)
            {   wellness = population[i].query();
                board = board + wellness;
                i = i + 1;
            }
            boardF.setText(board);
        }

        if (cause == go)
	{   i = 0;
            while (i < size)
	    {   A[i] = "0";
                i = i + 1;
	    }
            i = 0;
            iInc = 2;
            while (i < size)
	    {   wellness = population[i].query();
                if (wellness.equals("*")) 
	        {   j = 0;
                    while (j < rate)
		    {   iInc = ((iInc * 23) % 31);
                        m = i + iInc - 13;
                        if ((m >= 0) && (m < size))
			{    A[m] = "*";
			}
                        j = j + 1;
		    }
		}
                i = i + 1;
	    }
            i = 0;
            while (i < size)
	    {   population[i].update();
                i = i + 1;
	    }
            i = 0;
            while (i < size)
	    {   wellness = population[i].query();
                if ((wellness.equals("0")) && (A[i].equals("*")))
	        {   population[i].infect();
		}
                i = i + 1;
	    }
            i = 0;
            day = day + 1;
            board = "day " + day + " ";
            while (i < size)
	    {   wellness = population[i].query();
                board = board + wellness;
                i = i + 1;
	    }
            boardF.setText(board);
	}
    }
}