/*
 * (c) Copyright 2010-2011 AgileBirds
 *
 * This file is part of OpenFlexo.
 *
 * OpenFlexo 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.
 *
 * OpenFlexo 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 OpenFlexo. If not, see <http://www.gnu.org/licenses/>.
 *
 */
package org.openflexo.inspector.widget;

import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.util.regex.Pattern;

import javax.swing.JComponent;
import javax.swing.JTextField;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;

import org.openflexo.inspector.AbstractController;
import org.openflexo.inspector.model.PropertyModel;

/**
 * @author gpolet
 * 
 */
public class RegexpTextfieldWidget extends DenaliWidget<String> {

	private JTextField textfield;

	private boolean isUpdatingModel = false;

	private boolean isUpdatingWidget = false;

	public static final String COLUMNS_PARAM = "columns";
	private static final int DEFAULT_COLUMNS = 5;

	/**
	 * @param model
	 */
	protected RegexpTextfieldWidget(PropertyModel model, AbstractController controller) {
		super(model, controller);
		textfield = new JTextField();
		textfield.getDocument().addDocumentListener(new DocumentListener() {

			@Override
			public void changedUpdate(DocumentEvent e) {
				checkRegexp();
			}

			@Override
			public void insertUpdate(DocumentEvent e) {
				checkRegexp();
			}

			@Override
			public void removeUpdate(DocumentEvent e) {
				checkRegexp();
			}

		});
		textfield.addFocusListener(new FocusListener() {

			@Override
			public void focusGained(FocusEvent e) {

			}

			@Override
			public void focusLost(FocusEvent e) {
				updateModelFromWidget();
				updateWidgetFromModel();
			}

		});
		textfield.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				updateModelFromWidget();
				updateWidgetFromModel();
			}

		});

		if (model.hasValueForParameter(COLUMNS_PARAM)) {
			int colNb = model.getIntValueForParameter(COLUMNS_PARAM);
			textfield.setColumns(colNb > 0 ? colNb : DEFAULT_COLUMNS);
		} else {
			textfield.setColumns(DEFAULT_COLUMNS);
		}
		textfield.setMinimumSize(MINIMUM_SIZE);
	}

	void checkRegexp() {
		if (textfield.getText() != null && getPattern().matcher(textfield.getText()).matches()) {
			textfield.setBackground(Color.WHITE);
		} else {
			textfield.setBackground(Color.RED);
		}
	}

	/**
	 * Overrides getDefaultType
	 * 
	 * @see org.openflexo.inspector.widget.DenaliWidget#getDefaultType()
	 */
	@Override
	public Class getDefaultType() {
		return String.class;
	}

	/**
	 * Overrides getDynamicComponent
	 * 
	 * @see org.openflexo.inspector.widget.DenaliWidget#getDynamicComponent()
	 */
	@Override
	public JComponent getDynamicComponent() {
		return textfield;
	}

	/**
	 * Overrides updateModelFromWidget
	 * 
	 * @see org.openflexo.inspector.widget.DenaliWidget#updateModelFromWidget()
	 */
	@Override
	public synchronized void updateModelFromWidget() {
		isUpdatingModel = true;
		if (!isUpdatingWidget) {
			if (textfield.getText() != null && getPattern().matcher(textfield.getText()).matches()) {
				setObjectValue(textfield.getText());
			}
		}
		isUpdatingModel = false;
	}

	/**
	 * Overrides updateWidgetFromModel
	 * 
	 * @see org.openflexo.inspector.widget.DenaliWidget#updateWidgetFromModel()
	 */
	@Override
	public synchronized void updateWidgetFromModel() {
		widgetUpdating = true;
		isUpdatingWidget = true;
		if (!isUpdatingModel) {
			textfield.setText(getStringValue());
		}
		isUpdatingWidget = false;
		widgetUpdating = false;
	}

	public Pattern getPattern() {
		return Pattern.compile(getRegexp());
	}

	public String getRegexp() {
		if (_propertyModel.getValueForParameter("regexp").indexOf('"') > -1) {
			return _propertyModel.getValueForParameter("regexp").substring(1, _propertyModel.getValueForParameter("regexp").length() - 1);
		} else {
			return getModel().valueForKey(_propertyModel.getValueForParameter("regexp"));
		}
	}

}