import uc.*;
import java.io.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;

public class MainUCFrame extends JFrame 
implements ActionListener, TacOrdMessageable {

	JMenuBar menuBar;
	JTextArea outputArea;
	JScrollPane scrollPane;
	
	JMenuItem continueOnExitButton;
	JMenuItem endOnExitButton;
		
	JMenuItem allowPornographicButton;

	public MainUCFrame() {		
		setTitle( "UC - " + Commando.getVersion() );
		
		menuBar = new JMenuBar();
		menuBar.setBorder( BorderFactory.createRaisedBevelBorder() );
		
		JMenu onExitMenu = new JMenu( "On exit..." );
		menuBar.add( onExitMenu );
		
		continueOnExitButton = new JRadioButtonMenuItem( "run in background" );
		endOnExitButton = new JRadioButtonMenuItem( "end process" );
		onExitMenu.add( continueOnExitButton );
		onExitMenu.add( endOnExitButton );
		continueOnExitButton.addActionListener( this );
		continueOnExitButton.addActionListener( this );
		
		ButtonGroup onExitGroup = new ButtonGroup();
		onExitGroup.add( continueOnExitButton );
		onExitGroup.add( endOnExitButton );
		
		JMenu allowMenu = new JMenu( "Allow against..." );
		menuBar.add( allowMenu );
		
		allowPornographicButton = new JCheckBoxMenuItem( "pornographic sites" );
		allowMenu.add( allowPornographicButton );
		allowPornographicButton.addActionListener( this );
		
		outputArea = new JTextArea();
		outputArea.setEditable( false );
		outputArea.setWrapStyleWord( true );
		outputArea.setLineWrap( true );
		outputArea.setBackground( new Color( 0, 0, 0, 255 ) );
		outputArea.setForeground( new Color( 255, 0, 0, 255 ) );
		
		scrollPane = new JScrollPane( outputArea );
				
		JPanel topPanel = new JPanel( new BorderLayout() );
		topPanel.add( menuBar, BorderLayout.NORTH );
		topPanel.add( scrollPane, BorderLayout.CENTER );
		
		getContentPane().add( topPanel );
				
		pack();
		setSize( 400, 250 );
		setResizable( true );
		
		this.addWindowListener( new WindowAdapter() {
				public void windowClosing( WindowEvent e ) {
					savePreferences();
					if( endOnExitButton.isSelected() )
						System.exit( 0 );
				}
			} );
	}
	
	public void actionPerformed( ActionEvent event ) {
	
	}
	
	public void out( String text ) {		
		synchronized( outputArea ) {
			outputArea.setText( outputArea.getText() + "\n\n" + text );
			
			trimText();
			scrollToBottom();
		}
	}
	
	public void out( Object[] text ) {
		if( text == null )
			return;
		
		synchronized( outputArea ) {
			String t = outputArea.getText() + "\n";	
			for( int i = 0; i < text.length; i++ )
				if( text[ i ] != null )
					t = t + "\n" + text[ i ].toString();				
		
			outputArea.setText( t );
			
			trimText();
			scrollToBottom();
		}
	}
	
	public synchronized int getAllowCode() {
		int code = 0;
		
		code |= allowPornographicButton.isSelected() ? TacOrd.ALLOW_PORNOGRAPHIC : 0;
				
		return code;
	}
	
	public synchronized boolean getContinueOnExit() {
		return continueOnExitButton.isSelected();
	}
		
	public synchronized void loadPreferences() {
		ArrayList text = new ArrayList();
		int allowCode = 0;
		boolean continueOnExit = true;
		try {	
			
			text.add( "Opening " + Commando.PREF_FILE + " ..." );
				
			FileInputStream fileIn = new FileInputStream( Commando.PREF_FILE );
			DataInputStream dataIn = new DataInputStream( fileIn );
			
			int major = dataIn.readInt();
			int minor = dataIn.readInt();
			
			if( major == Commando.MAJORVERSION &&
				minor == Commando.MINORVERSION ) {
				allowCode = dataIn.readInt();
				continueOnExit = dataIn.readBoolean();
				text.add( "Read preferences" );
			} else {
				text.add( "Preferences file is for a different version(" + major + '.' + minor + ')' );
			}			
		} catch( IOException e ) {
			text.add( "IOException while reading " + Commando.PREF_FILE );
		}
		if( ( allowCode & TacOrd.ALLOW_PORNOGRAPHIC ) == TacOrd.ALLOW_PORNOGRAPHIC )
			text.add( "ALLOW pornographic orders" );
		else
			text.add( "DISALLOW pornographic orders" );
			
		if( continueOnExit )
			text.add( "UC process RUNS IN BACKGROUND upon window closure" );
		else
			text.add( "UC process TERMINATES upon window closure" );
		
		continueOnExitButton.setSelected( continueOnExit );
		endOnExitButton.setSelected( !continueOnExit );
		
		allowPornographicButton.setSelected( 
			( allowCode & TacOrd.ALLOW_PORNOGRAPHIC ) 
			== TacOrd.ALLOW_PORNOGRAPHIC );			
		
		out( text.toArray() );
	}
	
	void savePreferences() {
		try {
			FileOutputStream fileOut = new FileOutputStream( Commando.PREF_FILE );
			DataOutputStream dataOut = new DataOutputStream( fileOut );
			
			dataOut.writeInt( Commando.MAJORVERSION );
			dataOut.writeInt( Commando.MINORVERSION );
			
			dataOut.writeInt( getAllowCode() );
			dataOut.writeBoolean( getContinueOnExit() );		
		} catch( IOException e ) {	
			// can't save???
		}
	}
	
	public void tacOrdOut( Object[] text ) {
		out( text );
	}
	
	void trimText() {
		final int MAX_LENGTH = 8192;
		String text = outputArea.getText();
		if( text.length() > MAX_LENGTH ) {
			outputArea.setText( text.substring( text.length() - MAX_LENGTH ) );
		}
	}
	
	void scrollToBottom() {
		JViewport view   = scrollPane.getViewport();
		int extentHeight = view.getExtentSize().height;
		int viewHeight   = view.getViewSize().height;
		if( viewHeight > extentHeight ) {			
			Point p = new Point( 0, viewHeight - extentHeight );
			view.setViewPosition( p );
			scrollPane.repaint();	
		}		
	}
}