/*
 * (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.fge.geomedit.edition;

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.util.Vector;

import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.JPanel;

import org.openflexo.fge.geomedit.GeomEditController;
import org.openflexo.fge.geomedit.construction.GeometricConstruction;
import org.openflexo.fge.geomedit.edition.EditionInputMethod.InputComponent;
import org.openflexo.fge.graphics.FGEDrawingGraphics;

public abstract class EditionInput<O extends Object> {
	private String inputLabel;

	public Vector<EditionInputMethod> availableMethods;
	public EditionInputMethod activeMethod;

	private GeomEditController controller;

	private GeometricConstruction<O> contruction;

	public EditionInput(String anInputLabel, GeomEditController aController) {
		super();
		controller = aController;
		inputLabel = anInputLabel;
		availableMethods = new Vector<EditionInputMethod>();
		activeMethod = null;
	}

	protected abstract int getPreferredMethodIndex();

	private JPanel subPanel;

	public void resetControlPanel(JPanel controlPanel) {
		if (subPanel != null) {
			controlPanel.remove(subPanel);
			subPanel = null;
		}
	}

	public void updateControlPanel(JPanel controlPanel, JPanel availableMethodsPanel) {
		availableMethodsPanel.removeAll();
		if (activeMethod == null && getPreferredMethodIndex() < availableMethods.size()) {
			activeMethod = availableMethods.get(getPreferredMethodIndex());
		}
		availableMethodsPanel.add(new JLabel(inputLabel));
		for (final EditionInputMethod method : availableMethods) {
			InputComponent inputComponent = method.getInputComponent();
			availableMethodsPanel.add((JComponent) inputComponent);
			if (method == getActiveMethod()) {
				inputComponent.enableInputComponent();
			} else {
				inputComponent.disableInputComponent();
			}
		}
		if (getActiveMethod().hasChildInputs()) {
			subPanel = new JPanel(new BorderLayout());
			JPanel flowPanel = new JPanel(new FlowLayout(FlowLayout.CENTER, 5, 0));
			subPanel.add(flowPanel, BorderLayout.WEST);
			controlPanel.add(subPanel, BorderLayout.SOUTH);
			getActiveMethod().getCurrentInput().updateControlPanel(subPanel, flowPanel);
		} else if (subPanel != null) {
			controlPanel.remove(subPanel);
			subPanel = null;
		}
		availableMethodsPanel.revalidate();
		availableMethodsPanel.repaint();
	}

	public String getInputLabel() {
		return inputLabel;
	}

	public String getActiveMethodLabel() {
		if (getActiveMethod() != null) {
			return getActiveMethod().getMethodLabel();
		}
		return "No active selection method";
	}

	public EditionInputMethod getActiveMethod() {
		return activeMethod;
	}

	public void setActiveMethod(EditionInputMethod aMethod) {
		if (activeMethod != aMethod) {
			activeMethod = aMethod;
			controller.updateCurrentInput();
		}
	}

	public EditionInputMethod getDerivedActiveMethod() {
		if (activeMethod.hasChildInputs()) {
			return activeMethod.getCurrentInput().getDerivedActiveMethod();
		} else {
			return activeMethod;
		}
	}

	public GeomEditController getController() {
		return controller;
	}

	private O inputData;

	public O getInputData() {
		if (contruction != null) {
			return contruction.getData();
		}
		return inputData;
	}

	public void setInputData(O data) {
		inputData = data;
	}

	public void setConstruction(GeometricConstruction<O> aContruction) {
		contruction = aContruction;
	}

	public GeometricConstruction<? extends O> getConstruction() {
		return contruction;
	}

	public void done() {
		if (getParentInputMethod() != null) {
			getParentInputMethod().nextChildInput();
		} else {
			getController().currentInputGiven();
		}
	}

	public void endEdition() {
	}

	public void paint(FGEDrawingGraphics graphics) {
	}

	private EditionInputMethod parentInputMethod = null;

	public EditionInputMethod getParentInputMethod() {
		return parentInputMethod;
	}

	public void setParentInputMethod(EditionInputMethod aMethod) {
		this.parentInputMethod = aMethod;
	}

	public class EndEditionSelection extends EditionInputMethod<O, EditionInput<O>> {

		public EndEditionSelection() {
			super("Done", EditionInput.this);
		}

		@Override
		public void mouseClicked(MouseEvent e) {
			endEdition();
		}

		@Override
		public InputComponent getInputComponent() {
			return new EndEditionButton(this);
		}

	}

	public class EndEditionButton extends JButton implements InputComponent {
		public EndEditionButton(final EndEditionSelection method) {
			super(method.getMethodLabel());
			addActionListener(new ActionListener() {
				@Override
				public void actionPerformed(ActionEvent e) {
					method.getEditionInput().endEdition();
				}
			});
		}

		@Override
		public void enableInputComponent() {
			setSelected(true);
		}

		@Override
		public void disableInputComponent() {
			setSelected(false);
		}
	}

	public abstract boolean endOnRightClick();

}