/*******************************************************************************
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library 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 Lesser General Public License for more
 * details.
 *
 * Contributors:
 *      Kamesh Sampath - initial implementation
 *      Gregory Amerson - initial implementation review and ongoing maintenance
 *******************************************************************************/

package com.liferay.ide.portlet.core.model.internal;

import com.liferay.ide.portlet.core.model.CustomPortletMode;
import com.liferay.ide.portlet.core.model.PortletMode;

import org.eclipse.sapphire.Element;
import org.eclipse.sapphire.FilteredListener;
import org.eclipse.sapphire.ImageData;
import org.eclipse.sapphire.ImageService;
import org.eclipse.sapphire.Listener;
import org.eclipse.sapphire.PropertyContentEvent;

/**
 * @author Kamesh Sampath
 * @author Gregory Amerson
 */
public class PortletModeImageService extends ImageService
{

    private static final ImageData IMG_DEFAULT = ImageData.readFromClassLoader(
        PortletModeImageService.class, "images/portlet.png" ).required(); //$NON-NLS-1$

    private static final ImageData IMG_VIEW = ImageData.readFromClassLoader(
        PortletModeImageService.class, "images/view.png" ).required(); //$NON-NLS-1$

    private static final ImageData IMG_EDIT = ImageData.readFromClassLoader(
        PortletModeImageService.class, "images/edit.png" ).required(); //$NON-NLS-1$

    private static final ImageData IMG_HELP = ImageData.readFromClassLoader(
        PortletModeImageService.class, "images/help.png" ).required(); //$NON-NLS-1$

    private Listener listener;

    @Override
    protected void initImageService()
    {
        this.listener = new FilteredListener<PropertyContentEvent>()
        {
            @Override
            protected void handleTypedEvent( final PropertyContentEvent event )
            {
                refresh();
            }
        };

        context( Element.class ).attach( this.listener, PortletMode.PROP_PORTLET_MODE.name() );
    }

    @Override
    protected ImageData compute()
    {
        String portletMode = null;
        Element element = context( Element.class );
        ImageData imageData = null;

        if( element instanceof CustomPortletMode )
        {
            CustomPortletMode iCustomPortletMode = (CustomPortletMode) element;
            portletMode = String.valueOf( iCustomPortletMode.getPortletMode().content() );
        }
        else if( element instanceof PortletMode )
        {
            PortletMode iPortletMode = (PortletMode) element;
            portletMode = iPortletMode.getPortletMode().content();
        }

        if( portletMode != null )
        {
            if( "VIEW".equalsIgnoreCase( portletMode ) ) //$NON-NLS-1$
            {
                imageData = IMG_VIEW;
            }
            else if( "EDIT".equalsIgnoreCase( portletMode ) ) //$NON-NLS-1$
            {
                imageData = IMG_EDIT;
            }
            else if( "HELP".equalsIgnoreCase( portletMode ) ) //$NON-NLS-1$
            {
                imageData = IMG_HELP;
            }

        }

        if( imageData == null )
        {
            imageData = IMG_DEFAULT;
        }

        return imageData;
    }

    @Override
    public void dispose()
    {
        super.dispose();

        context( Element.class ).detach( this.listener, PortletMode.PROP_PORTLET_MODE.name() );
    }

}