/*******************************************************************************
 * 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.
 *
 *******************************************************************************/

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

import com.liferay.ide.layouttpl.core.model.CanAddPortletLayouts;
import com.liferay.ide.layouttpl.core.model.LayoutTplElement;
import com.liferay.ide.layouttpl.core.model.PortletColumnElement;
import com.liferay.ide.layouttpl.core.model.PortletLayoutElement;

import org.eclipse.sapphire.ElementList;
import org.eclipse.sapphire.FilteredListener;
import org.eclipse.sapphire.PropertyContentEvent;


/**
 * @author Kuo Zhang
 *
 */
public class PortletColumnsListener extends FilteredListener<PropertyContentEvent>
{

    @Override
    protected void handleTypedEvent( PropertyContentEvent event )
    {
        LayoutTplElement layouttpl = event.property().element().nearest( LayoutTplElement.class );
        updateColumns( layouttpl, 1 );
    }

    protected int updateColumns( CanAddPortletLayouts columnsParent, int numId )
    {
        for( PortletLayoutElement portletLayout : columnsParent.getPortletLayouts() )
        {
            ElementList<PortletColumnElement> columns = portletLayout.getPortletColumns();

            int size = columns.size();

            for( int i = 0; i < size; i++ )
            {
                PortletColumnElement column = columns.get( i );

                if( column.getPortletLayouts().size() == 0 )
                { 
                    column.setNumId( String.valueOf( numId++ ) );
                }
                else if( column.getPortletLayouts().size() > 0 )
                {
                    // when new child is added, the parent column will have no numId
                    column.setNumId( "N/A" );
                    numId = updateColumns( column, numId++ );
                }

                column.setOnly( false );
                column.setFirst( false );
                column.setLast( false );

                column.setColumnDescriptor( "" );
                column.setColumnContentDescriptor( "" );

                if( size == 1 )
                {
                    column.setOnly( true );
                    column.setColumnDescriptor( "portlet-column-only" );
                    column.setColumnContentDescriptor( "portlet-column-content-only" );
                }
                else if( size > 1 )
                {
                    if( i == 0 )
                    {
                        column.setFirst( true );
                        column.setColumnDescriptor( "portlet-column-first" );
                        column.setColumnContentDescriptor( "portlet-column-content-first" );
                    }
                    else if( i == size - 1 )
                    {
                        column.setLast( true );
                        column.setColumnDescriptor( "portlet-column-last" );
                        column.setColumnContentDescriptor( "portlet-column-content-last" );
                    }
                }
            }
        }

        return numId;
    }

}