package com.ericsson.tic.vi;

import javax.swing.JPanel;
import javax.swing.JLabel;
import java.awt.event.ItemListener;
import java.awt.event.ItemEvent;
import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.Dimension;
import javax.swing.JComboBox;
import java.io.File;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import java.io.IOException;

/**
 * The card panel holds "cards" or subpanels of type DataListPanel.
 * 
 * @see CardLayout
 * @author	Sami Matilainen
 * @version	1.0 (2008-12-04)
 */
public class CardPanel extends JPanel implements ItemListener {
	
	/** A panel used for layout. */
	private JPanel topPanel;
	
	/** A panel used for layout. */
	private JPanel cardsPanel;
	
	/** A list panel. */
	public DataListPanel categoriesCard, viewsCard;
	
	/** Placeholder panels. To be replaced by DataListPanels. */
	public JPanel nodesCard, relationsCard;
	
	/** ID for the categories panel. */
	public static final int CATEGORY = 0;
	
	/** ID for the nodes panel. */
	public static final int NODE = 1;
	
	/** ID for the relations panel. */
	public static final int REL = 2;
	
	/** ID for the view panel. */
	public static final int VIEW = 3;
	
	/**  
	 * Creates a card panel.
	 */
	public CardPanel() {
		
		this.setLayout(new BorderLayout());
		
		this.setPreferredSize(new Dimension(250, 250));
		this.setMinimumSize(new Dimension(250, 250));
		this.setMaximumSize(new Dimension(250, 250));
		
		try {
			VI.leftArrowIcon = new ImageIcon(ImageIO.read(new File("images/leftArrow.gif")));
			VI.downArrowIcon = new ImageIcon(ImageIO.read(new File("images/downArrow.gif")));
			
			VI.brushOnIcon = new ImageIcon(ImageIO.read(new File("images/brushOn.png")));
			VI.brushOffIcon = new ImageIcon(ImageIO.read(new File("images/brushOff.png")));
			
		} catch (IOException e) {
			e.printStackTrace();
		}
		
		topPanel = new JPanel();
		
		// Nodes and Relations options panes removed as they are not currently used
		// String comboBoxItems[] = { "Categories", "Nodes", "Relations", "Views" };
		String comboBoxItems[] = { "Categories", "Views" };
		
		
		JComboBox cb = new JComboBox(comboBoxItems);
        cb.setEditable(false);
        cb.addItemListener(this);
        topPanel.add(cb);
		
		categoriesCard = new DataListPanel(CATEGORY);
		viewsCard = new DataListPanel(VIEW);
		//nodesCard = new JPanel();
		//nodesCard.add(new JLabel("not implemented"));
		//relationsCard = new JPanel();
		//relationsCard.add(new JLabel("not implemented"));
		
		cardsPanel = new JPanel(new CardLayout());
		
		cardsPanel.add(categoriesCard, "Categories");
		//cardsPanel.add(nodesCard, "Nodes");
		//cardsPanel.add(relationsCard, "Relations");
		cardsPanel.add(viewsCard, "Views");
		
		this.add(topPanel, BorderLayout.NORTH);
		this.add(cardsPanel, BorderLayout.CENTER);
		
	}
	
	/**
	 * Called when an ItemEvent is triggered.
	 *
	 * @param evt The ItemEvent which triggered the event.
	 */
	public void itemStateChanged(ItemEvent evt) {
        CardLayout cl = (CardLayout)(cardsPanel.getLayout());
        cl.show(cardsPanel, (String)evt.getItem());
		
		viewsCard.updateViewList();
		
    }
	
}