/*
 * Created on 12.08.2004
 *
 * @author Jens Guenther
 */
package de.unirostock.AbstractFactory.example.awt;


import java.awt.Color;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;

import de.unirostock.AbstractFactory.example.ShipFactory;

public final class ChooseFactoryPanel extends JPanel
implements  ActionListener
{

	/**
	 * 
	 * @uml.property name="controller"
	 * @uml.associationEnd multiplicity="(0 1)"
	 */
	private MainController itsController;

	/**
	 * 
	 * @uml.property name="avaiableFactorys"
	 * @uml.associationEnd multiplicity="(0 -1)"
	 */
	private ShipFactory[] itsAvaiableFactorys;

	private int				itsActFactoryNum;
	
	private JLabel			itsClassNameLabel;
	private JLabel			itsImageLabel;
	
	private final static String BT_BACK	= "BT_BACK";
	private final static String BT_FWD	= "BT_FWD";
	
	public ChooseFactoryPanel( MainController controller )
	{
		itsController		= controller;
		itsAvaiableFactorys	= itsController.getAvaiableShipFactorys();
		itsActFactoryNum	= 0;
			
		initGraphics();
	}
	
	public ShipFactory getSelectedShipFactory(){
		return itsAvaiableFactorys[itsActFactoryNum];
	}
	
	public void actionPerformed( ActionEvent e )
	{
		String cmd	= e.getActionCommand();
		
		if( cmd.equals( BT_BACK ))	prevFactory();
		if( cmd.equals( BT_FWD ))	nextFactory();
	}
	
	private void prevFactory()
	{
		itsActFactoryNum--;
		if( itsActFactoryNum == -1 )	itsActFactoryNum = itsAvaiableFactorys.length - 1;
		itsImageLabel.setIcon( getBookIcon( itsActFactoryNum ));
		itsClassNameLabel.setText( getFactoryCLassName( itsActFactoryNum ));
	}
	
	private void nextFactory()
	{
		itsActFactoryNum++;
		if( itsActFactoryNum == itsAvaiableFactorys.length )	itsActFactoryNum = 0;
		itsImageLabel.setIcon( getBookIcon( itsActFactoryNum ));
		itsClassNameLabel.setText( getFactoryCLassName( itsActFactoryNum ));
	}
	
	private Icon getBookIcon( int num ){
		return itsAvaiableFactorys[num].getBookIcon();
	}
	
	private String getFactoryCLassName( int num ){
		String	factory	= itsAvaiableFactorys[num].getClass().getName();
		int		lastDot	= factory.lastIndexOf( '.' );
		return factory.substring( lastDot+1 );
	}
	
	private void initGraphics()
	{
		setBackground( new Color( 255,255,255 ));
		
		GridBagLayout gridbag = new GridBagLayout();
		GridBagConstraints c = new GridBagConstraints();
		setLayout( gridbag );
		
		// image label
		itsImageLabel	= new JLabel( getBookIcon( itsActFactoryNum ));
		itsImageLabel.setBackground( new Color( 255,255,255 ));
		c.insets	= new Insets( 25,5,5,5 );
		c.weightx	= 1.0;
		c.weighty	= 0;
		c.fill		= GridBagConstraints.HORIZONTAL;
		c.gridwidth	= GridBagConstraints.REMAINDER;
		gridbag.setConstraints( itsImageLabel, c );
		add( itsImageLabel );
		
		// button back
		JButton	btBack	= new JButton( " < " );
		btBack.setActionCommand( BT_BACK );
		btBack.addActionListener( this );
		c.insets	= new Insets( 25,5,50,5 );
		c.weightx	= 0;
		c.weighty	= 0;
		c.fill		= GridBagConstraints.NONE;
		c.gridwidth	= 1;
		gridbag.setConstraints( btBack, c );
		add( btBack );
		
		// Label className
		itsClassNameLabel	= new JLabel( getFactoryCLassName( itsActFactoryNum ));
		itsClassNameLabel.setHorizontalAlignment( JLabel.CENTER );
		itsClassNameLabel.setBackground( new Color( 255,255,255 ));
		c.insets	= new Insets( 25,5,50,5 );
		c.weightx	= 1.0;
		c.weighty	= 0;
		c.fill		= GridBagConstraints.NONE;
		c.gridwidth	= GridBagConstraints.RELATIVE;
		gridbag.setConstraints( itsClassNameLabel, c );
		add( itsClassNameLabel );
		
		// button back
		JButton	btFwd	= new JButton( " > " );
		btFwd.setActionCommand( BT_FWD );
		btFwd.addActionListener( this );
		c.insets	= new Insets( 25,5,50,5 );
		c.weightx	= 0;
		c.weighty	= 0;
		c.fill		= GridBagConstraints.HORIZONTAL;
		c.gridwidth	= GridBagConstraints.REMAINDER;
		gridbag.setConstraints( btFwd, c );
		add( btFwd );
	}
}