import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;
import java.io.*;
import java.io.BufferedReader ;
import java.io.InputStreamReader;
import java.net.URL ;
import java.util.*;

public class Converter extends Applet {
	public Color background;
	public Font font;

	public void init() {
		background=new Color(Integer.parseInt("bbddFF", 16));
		font= new Font("SansSerif", Font.BOLD, 11);
		setFont(font);
		setBackground(background);
		this.setLayout(new BorderLayout());

		Body body= new Body(this);
		this.add("Center",body);

		Button showWindow = new Button("Open In Window");
		showWindow.setFont(new Font("SansSerif", Font.BOLD, 10));
		showWindow.setBackground(background);
		showWindow.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e) {
				FloatWindow fw=new FloatWindow(Converter.this);
				fw.pack();
				fw.show();
			}
		});
		Panel p=new Panel();
		p.add(showWindow);
		this.add("South",p);
	}
}

class FloatWindow extends Frame
{
	private Button ok;

	public FloatWindow(Converter converter) {
		//this.super("Universal Currency Converter");
		super("Universal Currency Converter");
		this.setLayout(new BorderLayout());
		this.setLocation(400,200);
		setFont(converter.font);
		setBackground(converter.background);
		ok=new Button("Close");
		ok.setBackground(converter.background);
		Panel p=new Panel();
		p.add(ok);
		this.add("South",p);

		Body body=new Body(converter);
		this.add("Center",body);

		ok.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				FloatWindow.this.close();
			}
		});
		this.addWindowListener(new WindowAdapter(){
			public void windowClosing(WindowEvent e) {
			FloatWindow.this.close();
			}
		});
	}

	public void close() {
		this.dispose();
		this.setVisible(false);
	}
}

class Body extends Panel implements ActionListener, ItemListener
{
	public TextField in, out;
	public Choice currency, currency2;
	public Label rate;
	private FloatWindow fw;
	private Brain brain;
	private GridBagLayout grid;
	private GridBagConstraints gbc;

	public Body(Converter converter) {
		brain=new Brain(this,converter);

		setBackground(converter.background);
		setFont(converter.font);

		in = new TextField("0",10);
		in.addActionListener(this);

		out = new TextField("0",10);
		out.setEditable(false);
		out.setBackground(Color.white);

		rate= new Label("		");
		rate.setAlignment(Label.LEFT);

		currency2 = new Choice();
		currency2.addItemListener(this);

		currency = new Choice();
		currency.addItemListener(this);

		for(int i=0;brain.Currencies[i]!=null;i++) {
			currency.addItem(brain.Currencies[i]);
			currency2.addItem(brain.Currencies[i]);
		}
		currency.select(2);

		grid = new GridBagLayout();
		gbc = new GridBagConstraints();
		this.setLayout(grid);
		Label date = new Label("Updated: "+brain.getDate());

		gbc.anchor=GridBagConstraints.WEST;
		gbc.fill=GridBagConstraints.HORIZONTAL;
		gbc.insets=new Insets(5,5,2,2);
		myadd(in, grid, gbc, 0, 0, 2, 1);
		myadd(currency2, grid, gbc, 2, 0, 2, 1);
		myadd(new Label("="), grid, gbc, 4, 0, 1, 1);
		myadd(out, grid, gbc, 5, 0, 2, 1);
		myadd(currency, grid, gbc, 7, 0, 2, 1);
		myadd(new Label("Rate:"), grid, gbc, 0, 1, 1, 1);
		myadd(rate, grid, gbc, 1, 1, 2, 1);
		myadd(date, grid, gbc, 6, 1, 3, 1);

		brain.calculate();
	}

	private void myadd(Component c, GridBagLayout grid, GridBagConstraints gbc, int x, int y, int w, int h) {
		gbc.gridx=x;
		gbc.gridy=y;
		gbc.gridwidth=w;
		gbc.gridheight=h;
		grid.setConstraints(c,gbc);
		this.add(c);
	}

	public void actionPerformed(ActionEvent e) {
		brain.calculate();
	}
	public void itemStateChanged(ItemEvent e) {
		brain.calculate();
	}

}

class Brain {
	public String Currencies[],s;
	private  float Rates[];
	private Body parent;
	private URL codebase;
	private String date;

	public Brain(Body parent,Converter converter) {
		this.parent=parent;
		this.codebase = converter.getCodeBase();
		Currencies = new String[20];
		Rates= new float[20];
		sortData(readFile("rates.data"));
	}

	public String getDate() {
		return date;
	}

	public void calculate() {
		float exchange=0;
		float pounds=0;
		exchange = Rates[parent.currency2.getSelectedIndex()] / Rates[parent.currency.getSelectedIndex()];
		String rateString = ""+exchange;
		parent.rate.setText(rateString);
		try {
			Float f=Float.valueOf(parent.in.getText());
			pounds=f.floatValue();
		}
		catch(NumberFormatException e) {
			parent.in.setText("0");
			Float f=Float.valueOf(parent.in.getText());
			pounds=f.floatValue();
		}
		float exactcents = pounds*exchange;
		int cents = Math.round(exactcents);
		parent.out.setText(cents+"");
	}

	private String readFile(String f) {
		String s = new String("") ;
		BufferedReader fis = null ;
		try {
			URL u = new URL( codebase, f ) ;
			fis = new BufferedReader( new InputStreamReader( u.openStream()) ) ;
		}
		catch( Exception e ) {
			s = "readFile : " + f + "\r\n --> Exception : " + e ;
			return s;
		}
		String sS = new String("") ;
		while(true) {
			try {
				sS = fis.readLine() ;
				if (sS != null) s = s + "\r\n" + sS ;
				else break ;
			}
			catch( Exception e ) {
				break ;
			}
		}
		return s;
	}

	private void sortData(String all) {
		all=all.replace('\r','\t');
		all=all.replace('\n',' ');
		StringTokenizer st = new StringTokenizer(all,"\t");
		date=st.nextToken();

		boolean eof=false;
		for(int i=0;((st.hasMoreElements())&&(!eof)&&(i<Rates.length));i++) {
			String name=(st.nextToken()).trim();
			System.out.println("Name: "+name);

			if((st.hasMoreElements())&&(!name.equals(" "))&&(!((name.toLowerCase()).startsWith("end")))){
				String value=(st.nextToken()).trim();
				System.out.println("Value: "+value);
				try {
					Float f=Float.valueOf(value);
					Rates[i]=f.floatValue();
				}
				catch(NumberFormatException e) {
					System.out.println("Not a number");
					Rates[i]=0;
				}
				Currencies[i]=name;
			}
			else eof=true;
		}
	}
}