/*
 * Copyright (c) 2011, grossmann
 * 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.workbench.toolkit.impl;

import java.util.LinkedList;
import java.util.List;

import org.jowidgets.api.model.IListModelListener;
import org.jowidgets.tools.controller.ListModelAdapter;
import org.jowidgets.util.Assert;
import org.jowidgets.workbench.api.IComponentNodeContainerContext;
import org.jowidgets.workbench.toolkit.api.IComponentNodeContainerModel;
import org.jowidgets.workbench.toolkit.api.IComponentNodeModel;

class ComponentNodeContainer {

    private final IComponentNodeContainerModel model;
    private final List<ComponentNode> createdChildren;

    private IListModelListener listModelListener;
    private IComponentNodeContainerContext context;

    ComponentNodeContainer(final IComponentNodeContainerModel model) {
        Assert.paramNotNull(model, "model");
        this.createdChildren = new LinkedList<ComponentNode>();

        this.model = model;
    }

    void initialize(final IComponentNodeContainerContext context) {
        if (this.context != null) {
            throw new IllegalStateException("Container already initialized!");
        }
        this.context = context;

        for (final IComponentNodeModel nodeModel : model.getChildren()) {
            final ComponentNode componentNode = new ComponentNode(nodeModel);
            createdChildren.add(componentNode);
            context.add(componentNode);
        }

        listModelListener = new ListModelAdapter() {
            @Override
            public void afterChildRemoved(final int index) {
                final ComponentNode componentNode = createdChildren.remove(index);
                if (componentNode != null) {
                    context.remove(componentNode);
                    componentNode.dispose();
                }
            }

            @Override
            public void afterChildAdded(final int index) {
                final IComponentNodeModel nodeModel = model.getChildren().get(index);
                final ComponentNode componentNode = new ComponentNode(nodeModel);
                createdChildren.add(index, componentNode);
                context.add(index, componentNode);
            }
        };

        model.addListModelListener(listModelListener);
    }

    void dispose() {
        for (final ComponentNode childNode : createdChildren) {
            childNode.dispose();
        }
        model.removeListModelListener(listModelListener);
    }

    protected IComponentNodeContainerModel getModel() {
        return model;
    }

}