/**
 *    SampleWidget2.java
 *    Copyright (C) 2010 New Zealand Digital Library, http://expeditee.org
 *
 *    This program is free software: you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation, either version 3 of the License, or
 *    (at your option) any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.expeditee.items.widgets;

import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.util.Random;

import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSplitPane;
import javax.swing.JTextArea;
import javax.swing.JToggleButton;

import org.expeditee.core.Colour;
import org.expeditee.gio.swing.SwingConversions;
import org.expeditee.gio.swing.SwingFontManager;
import org.expeditee.items.Text;

public class SampleWidget2 extends SwingWidget {

	private static final Font STANDARD_FONT = SwingFontManager.getInstance().getInternalFont(SwingFontManager.getInstance().getDefaultFont());
	private static final Font BIG_FONT = STANDARD_FONT.deriveFont(STANDARD_FONT.getSize() * 2f);
	private final JComboBox<String> cmboPrepend;
	private final JTextArea utxt = new JTextArea();;
		
	public SampleWidget2(Text source, String[] args) {
		super(source, new JSplitPane(JSplitPane.VERTICAL_SPLIT), 60, -1, 40, -1);
		final JSplitPane sp = (JSplitPane)super._swingComponent;
		
		//Build controls area.
		final JPanel controls = new JPanel(new FlowLayout());
		controls.setBackground(SwingConversions.toSwingColor(Colour.FromRGB255(255,228,195)));
		
		final JLabel lblTitle = new JLabel("This is an example Widget!");
		lblTitle.setFont(BIG_FONT);
		
		final JToggleButton tbtnStyle = new JToggleButton("Toggle Style");
		tbtnStyle.setFont(BIG_FONT);
		tbtnStyle.addItemListener(new ToggleStyle(utxt));
		
		final JCheckBox ckbBigFont = new JCheckBox("Big Font");
		ckbBigFont.setBackground(null);
		ckbBigFont.setSelected(true);
		ckbBigFont.setFont(BIG_FONT);
		ckbBigFont.addItemListener(new ToggleBigFont(utxt));
		
		final Random r = new Random();
		final String[] options = new String[] { "Item: " + r.nextInt(100), "Item: " + r.nextInt(100), "Item: " + r.nextInt(100), "Item: " + r.nextInt(100), "Item: " + r.nextInt(100), 
				"Item: " + r.nextInt(100), "Item: " + r.nextInt(100), "Item: " + r.nextInt(100), "Item: " + r.nextInt(100), "Item: " + r.nextInt(100) };
		cmboPrepend = new JComboBox<String>(options);
		cmboPrepend.setFont(BIG_FONT);
		cmboPrepend.addActionListener(new PrependManager(cmboPrepend, utxt));
		cmboPrepend.setLightWeightPopupEnabled(false);
		
		controls.add(lblTitle);
		controls.add(cmboPrepend);
		controls.add(tbtnStyle);
		controls.add(ckbBigFont);		
		sp.setTopComponent(controls);
		
		//Build user text area.
		utxt.setFont(BIG_FONT);
		sp.setBottomComponent(utxt);

		//Initialise state
		init(args, cmboPrepend, utxt);		
	}

	private void init(String[] args, final JComboBox<String> cmboPrepend, final JTextArea utxt) {
		if (args != null && args.length >= 1) {
			
			int selectedItem = 0;
			
			// extract selected index
			if (args.length >= 1 && args[0] != null) {
				try {
					selectedItem = Integer.parseInt(args[0]);
				} catch (NumberFormatException e) {
					e.printStackTrace();
				}
			}
			
			if (selectedItem < 0) {
				selectedItem = 0;
			} else if (selectedItem >= cmboPrepend.getItemCount()) {
				selectedItem = cmboPrepend.getItemCount() - 1;
			}
			
			cmboPrepend.setSelectedIndex(selectedItem);
			
			if (args.length >= 2 && args[1] != null) {
				utxt.setText(args[1]);
			}
			
			if (args.length >= 3 && args[2] != null) {
				try {
					int div = Integer.parseInt(args[2]);
					((JSplitPane)super._swingComponent).setDividerLocation(div);
				} catch (NumberFormatException e) {}
				
			}
		}
	}

	private class PrependManager implements ActionListener {
		private JComboBox<String> toConsult;
		private JTextArea toAlter;
		public PrependManager(final JComboBox<String> toConsult, final JTextArea toAlter) {
			this.toConsult = toConsult;
			this.toAlter = toAlter;
		}
		
		@Override
		public void actionPerformed(ActionEvent e) {
			this.toAlter.setText(this.toConsult.getSelectedItem() + " " + this.toAlter.getText());
		}
	}
	
	private class ToggleStyle implements ItemListener {
		private JTextArea toToggle;
		public ToggleStyle(final JTextArea toToggle) {
			this.toToggle = toToggle;			
		}
		
		@Override
		public void itemStateChanged(final ItemEvent e) {
			if(e.getStateChange() == ItemEvent.SELECTED) {
				toToggle.setFont(toToggle.getFont().deriveFont(Font.BOLD));
			} else if (e.getStateChange() == ItemEvent.DESELECTED) {
				toToggle.setFont(toToggle.getFont().deriveFont(Font.PLAIN));
			}
		}
	}
	
	private class ToggleBigFont implements ItemListener {
		private JTextArea toToggle;

		public ToggleBigFont(final JTextArea toToggle) {
			this.toToggle = toToggle;	
		}

		@Override
		public void itemStateChanged(final ItemEvent e) {
			if(e.getStateChange() == ItemEvent.SELECTED) {
				toToggle.setFont(BIG_FONT.deriveFont(toToggle.getFont().getStyle()));
			} else if(e.getStateChange() == ItemEvent.DESELECTED) {
				toToggle.setFont(STANDARD_FONT.deriveFont(toToggle.getFont().getStyle()));
			}
		}
	}
	
	@Override
	protected String[] getArgs() {
		
		return new String[] { 
				Integer.toString(cmboPrepend.getSelectedIndex()),
				utxt.getText(),
				Integer.toString(((JSplitPane)super._swingComponent).getDividerLocation())
			};
	}
}