/*
 * Copyright (c) 2010, grossmann, Benjamin Marstaller, Nikolaus Moll
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * * Neither the name of the jo-widgets.org nor the
 *   names of its contributors may be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL jo-widgets.org BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */

package org.jowidgets.spi.impl.swing.common.widgets;

import java.awt.Container;
import java.util.ArrayList;
import java.util.List;

import javax.swing.ButtonGroup;
import javax.swing.JCheckBoxMenuItem;
import javax.swing.JComponent;
import javax.swing.JRadioButtonMenuItem;

import org.jowidgets.spi.widgets.IActionMenuItemSpi;
import org.jowidgets.spi.widgets.IMenuItemSpi;
import org.jowidgets.spi.widgets.IMenuSpi;
import org.jowidgets.spi.widgets.ISelectableMenuItemSpi;
import org.jowidgets.spi.widgets.ISubMenuSpi;

public abstract class AbstractSwingMenu extends SwingWidget implements IMenuSpi {

    private final List<JoSwingButtonGroup> radioGroups;

    public AbstractSwingMenu(final Container component) {
        super(component);
        this.radioGroups = new ArrayList<AbstractSwingMenu.JoSwingButtonGroup>();
        this.radioGroups.add(new JoSwingButtonGroup(null, new ButtonGroup()));
    }

    @Override
    public Container getUiReference() {
        return (Container) super.getUiReference();
    }

    @Override
    public void remove(final int index) {
        getUiReference().remove(index);
        if (getUiReference() instanceof JComponent) {
            final JComponent jComponent = (JComponent) getUiReference();
            jComponent.revalidate();
            jComponent.repaint();
        }
    }

    @Override
    public IMenuItemSpi addSeparator(final Integer index) {
        final SeparatorMenuItemImpl result = new SeparatorMenuItemImpl();
        radioGroups.add(new JoSwingButtonGroup(result, new ButtonGroup()));
        addItem(index, result);
        return result;
    }

    @Override
    public IActionMenuItemSpi addActionItem(final Integer index) {
        final ActionMenuItemImpl result = new ActionMenuItemImpl();
        addItem(index, result);
        return result;
    }

    @Override
    public ISelectableMenuItemSpi addCheckedItem(final Integer index) {
        final SelectableMenuItemImpl result = new SelectableMenuItemImpl(new JCheckBoxMenuItem());
        addItem(index, result);
        return result;
    }

    @Override
    public ISelectableMenuItemSpi addRadioItem(final Integer index) {
        final JRadioButtonMenuItem radioItem = new JRadioButtonMenuItem();
        final ButtonGroup radioGroup = findRadioGroup(index);
        radioGroup.add(radioItem);
        final SelectableMenuItemImpl result = new SelectableMenuItemImpl(radioItem);
        addItem(index, result);
        return result;
    }

    @Override
    public ISubMenuSpi addSubMenu(final Integer index) {
        final SubMenuImpl result = new SubMenuImpl();
        addItem(index, result);
        return result;
    }

    private void addItem(final Integer index, final SwingWidget item) {
        if (index != null) {
            getUiReference().add(item.getUiReference(), index.intValue());
        }
        else {
            getUiReference().add(item.getUiReference());
        }
    }

    private ButtonGroup findRadioGroup(final Integer index) {
        final int safeIndex;
        if (index != null) {
            safeIndex = index.intValue();
        }
        else {
            safeIndex = getUiReference().getComponentCount();
        }
        ButtonGroup result = radioGroups.get(0).getButtonGroup();

        if (radioGroups.size() != 1) {
            for (final JoSwingButtonGroup joButtonGroup : radioGroups) {
                final SeparatorMenuItemImpl separator = joButtonGroup.getSeparator();
                if (separator == null) {
                    continue;
                }
                int componentIndex = 0;
                final int componentCount = getUiReference().getComponentCount();
                for (int i = 0; i < componentCount; i++) {
                    if (getUiReference().getComponent(i) == separator.getUiReference()) {
                        componentIndex = i;
                        break;
                    }
                }
                if (componentIndex >= safeIndex) {
                    break;
                }
                result = joButtonGroup.getButtonGroup();
            }
        }
        return result;
    }

    private static class JoSwingButtonGroup {

        private final SeparatorMenuItemImpl separator;

        private final ButtonGroup buttonGroup;

        /**
         * @param separatorIndex
         * @param separator
         * @param buttonGroup
         */
        JoSwingButtonGroup(final SeparatorMenuItemImpl separator, final ButtonGroup buttonGroup) {
            this.separator = separator;
            this.buttonGroup = buttonGroup;
        }

        protected SeparatorMenuItemImpl getSeparator() {
            return separator;
        }

        protected ButtonGroup getButtonGroup() {
            return buttonGroup;
        }

    }
}