/*
 * Copyright (C) Andrew Dolgert 1999 under Gnu Public License
 * http://www.gnu.org/copyleft/gpl.html
 *
 * NessApplet.java
 * This applet shows a toy model of nonequilibrium charges moving on
 * a torus (wrapping around the edges).  The model says that all particles
 * move equally likely left and right but half slightly prefer to move
 * up and half slightly prefer to move down.  The model is similar to that
 * of Beate Schmittman and Royce Zia of Virginia Tech Physics, but it does
 * not include the possibility and up and down particle can exchange charge
 * (switch places).
 *
 * Drew Dolgert September 1999
 */
 
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;

/*
 * This class is a container for the canvas that does all the work.
 * It is called the NessApplet after Non-Equilibrium Steady States.
 */
public class NessApplet extends Applet implements ActionListener
{
    // There is a kind of Asian slot machine I remember where balls
    // fell against pegs.  That is the name of the class that represents
    // the board and balls on it.
	Pacinco board;
	Button stopButton, resetButton;
	static final String sResource = "NessStrings";
	String sStart, sStop, sReset;

	public void init()
	{
		String sParam;
		int nBalls, nBoardSizeX,nBoardSizeY;
		double dWeight, dMobility;
		ResourceBundle rb;

		// The resource bundle contains strings in various languages.
		// See the CollisionStrings*.properties files.
		String sUseRB = this.getParameter("international");
		rb = null;
		if ((sUseRB == null) || !sUseRB.equalsIgnoreCase("no")) {
			String sLang = this.getParameter("language");
			String sCountry = this.getParameter("country");
			try {
				if (sLang == null)
					rb = ResourceBundle.getBundle(sResource, Locale.getDefault());
				else {
					Locale thisloc;
					if (sCountry == null)
						thisloc = new Locale(sLang,"");
					else
						thisloc = new Locale(sLang,sCountry);
					rb = ResourceBundle.getBundle(sResource,thisloc);
				}
			} catch (java.lang.ClassFormatError e) {
				System.out.println("ClassFormatError: "+e.getMessage());
				rb = null;
			} catch (MissingResourceException e) {
				System.out.println("Missing Resource: "+e.getMessage());
				rb = null;
			}
		}
		if (rb!=null) {
			try {
				sStart = rb.getString("start");
				sStop = rb.getString("stop");
				sReset = rb.getString("reset");
			} catch (MissingResourceException e) {
				System.out.println("Missing Resource: "+e.getMessage());
				sStart = "Start";
				sStop = "Stop";
				sReset = "Reset";
			}
		} else {
			sStart = "Start";
			sStop = "Stop";
			sReset = "Reset";
		}
		// Load parameters needed for creating the two main panels.
        // Start with default colors.
		sParam = this.getParameter("backgroundcolor");
        Color bgColor = this.pickColor(sParam,Color.white);
		sParam = this.getParameter("upcolor");
        Color upColor = this.pickColor(sParam,Color.red);
		sParam = this.getParameter("downcolor");
        Color downColor = this.pickColor(sParam,Color.blue);
        // Move to x and y size of board.
		sParam = this.getParameter("boardsizex");
		if (sParam != null) {
			try {
				nBoardSizeX = Integer.parseInt(sParam);
			} catch (NumberFormatException e) {
				nBoardSizeX = 40;
				System.out.println("boardsize should be an integer size of a side of the board.");
			}
		} else nBoardSizeX = 40;
		sParam = this.getParameter("boardsizey");
		if (sParam != null) {
			try {
				nBoardSizeY = Integer.parseInt(sParam);
			} catch (NumberFormatException e) {
				nBoardSizeY = 40;
				System.out.println("boardsize should be an integer size of a side of the board.");
			}
		} else nBoardSizeY = 40;
        // How about the total number of balls?
		sParam = this.getParameter("nballs");
		if (sParam != null) {
			try {
				nBalls = Integer.parseInt(sParam);
			} catch (NumberFormatException e) {
				nBalls = (int)(nBoardSizeX*nBoardSizeY*0.25);
				System.out.println("nballs should be an integer number of balls on the board.");
			}
		} else nBalls = (int)(nBoardSizeX*nBoardSizeY*0.25);
        // The weight expresses the driving field.  It is explained in more detail
		// in the Pacinco class.
		sParam = this.getParameter("weight");
		if (sParam != null) {
			try {
				dWeight = Double.valueOf(sParam).doubleValue();
			} catch (NumberFormatException e) {
				dWeight = 0.4;
				System.out.println("weight is a number between -1 and +1 which measures driving force.");
			}
		} else dWeight = 0.4;
        // The mobility is the average percentage of balls that get to move each turn.
		sParam = this.getParameter("mobility");
		if (sParam != null) {
			try {
				dMobility = Double.valueOf(sParam).doubleValue();
			} catch (NumberFormatException e) {
				dMobility = 0.6;
				System.out.println("mobility is the percentage of balls that move each step.");
			}
		} else dMobility = 0.6;

        // Now create the board.
		this.setLayout(new BorderLayout());
	    	Panel p1 = new Panel(new GridLayout(1,2));
		board = new Pacinco(nBoardSizeX,nBoardSizeY,nBalls); // ave Velocity, Mass Ratio
        board.setBGColor(bgColor);
        board.setUpColor(upColor);
        board.setDownColor(downColor);
		board.setWeight(dWeight);
		board.setMobility(dMobility);

        // Threadsleep is how long the routine should pause between iterations.
		sParam = this.getParameter("threadsleep");
		if (sParam != null) {
			try {
				int threadsleep = Integer.parseInt(sParam);
                board.setThreadSleep(threadsleep);
			} catch (NumberFormatException e) {
				System.out.println("Threadsleep should be an integer number of milliseconds to sleep.");
			}
		}
		p1.add(board);
		this.add(p1,"Center");
		Panel p2 = new Panel();
		stopButton = new Button(sStart);
		stopButton.setActionCommand("start");
		stopButton.addActionListener(this);
		p2.add(stopButton);
		resetButton = new Button(sReset);
		resetButton.setActionCommand("reset");
		resetButton.addActionListener(this);
		p2.add(resetButton);
		this.add(p2,"South");
	}

    // When someone clicks on anything in the applet,
	// this method gets the call and notifies proper authorities.
	public void actionPerformed(ActionEvent e) {
        if (e.getActionCommand().equals("reset")) {
            board.reset();
        } else if (e.getActionCommand().equals("stop")) {
            stopButton.setLabel(sStart);
            stopButton.setActionCommand("start");
			stopButton.getParent().invalidate();
			stopButton.getParent().validate();
            board.ustop();  // Tell the board the user requested a stop.
        } else if (e.getActionCommand().equals("start")) {
            stopButton.setLabel(sStop);
            stopButton.setActionCommand("stop");
			stopButton.getParent().invalidate();
			stopButton.getParent().validate();
            board.ustart(); // Tell the board the user requested a start.
        }

	}

	public String getAppletInfo() {
		return "NessApplet v. 1.0.  Written by Drew Dolgert.\n"+
		"Copyright (C) Andrew Dolgert ajd2m@physics.virginia.edu 1999\n"+
		"Under Gnu Public License http://www.gnu.org/copyleft/gpl.html";
	}

	static final String[][] parameterInfo = {
			{"international","yes or no [yes]", "Setting this to \"no\" turns off internationalization "+
					"in case your browser cannot handle it."},
			{"language","two letter language code", "EN for English, FR for French, etc."},
			{"country","two letter country code", "CN for China, IT for Italy.  Not required."},
            {"boardsizex","integer width of board [40]","20 is small.  200 is a decent size."},
            {"boardsizey","integer height of board [40]","20 is small.  200 is a decent size."},
			{"nballs","integer [400]","Number of balls in grid."},
			{"weight","double between -1 and 1 [0.4]","0 is no applied current.  1 (or -1) is maximum."},
            {"mobility","double between 0 and 1 [0.6]","Percentage of balls that move each turn."},
			{"upcolor","string color","black,blue,cyan,darkGray,gray,green,lightGray,magenta,orange,pink,red,white,yellow"},
			{"downcolor","string color","black,blue,cyan,darkGray,gray,green,lightGray,magenta,orange,pink,red,white,yellow"},
			{"backgroundcolor","string color","black,blue,cyan,darkGray,gray,green,lightGray,magenta,orange,pink,red,white,yellow"},
			{"threadsleep","integer [20]","Number of milliseconds the gas thread should sleep."},
		};
		
	public String[][] getParameterInfo() {
		return parameterInfo;
	}

	public void astart()
	{
		board.astart();
	}

	public void stop()
	{
		board.astop();
	}

	private Color pickColor(String sParam, Color defaultColor)
	{
	    if (sParam == null) return defaultColor;
	    if (sParam.equalsIgnoreCase("black")) return Color.black;
	    if (sParam.equalsIgnoreCase("blue")) return Color.blue;
	    if (sParam.equalsIgnoreCase("cyan")) return Color.cyan;
	    if (sParam.equalsIgnoreCase("darkGray")) return Color.darkGray;
	    if (sParam.equalsIgnoreCase("gray")) return Color.gray;
	    if (sParam.equalsIgnoreCase("green")) return Color.green;
	    if (sParam.equalsIgnoreCase("lightGray")) return Color.lightGray;
	    if (sParam.equalsIgnoreCase("magenta")) return Color.magenta;
	    if (sParam.equalsIgnoreCase("orange")) return Color.orange;
	    if (sParam.equalsIgnoreCase("pink")) return Color.pink;
	    if (sParam.equalsIgnoreCase("red")) return Color.red;
	    if (sParam.equalsIgnoreCase("yellow")) return Color.yellow;
	    if (sParam.equalsIgnoreCase("white")) return Color.white;
	    return defaultColor;
	}
	
	public static void main(String args[]) {
		Applet applet = new NessApplet();
		Frame f = new Frame("NESS Applet");
		f.add("Center",applet);
        f.setSize(500,300);
        f.setBackground(Color.lightGray);
        f.show();
		applet.init();
		applet.start();
	}
}