/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

package org.libreoffice.report.pentaho.layoutprocessor;

import org.libreoffice.report.OfficeToken;
import org.libreoffice.report.SDBCReportDataFactory;
import org.libreoffice.report.pentaho.model.ObjectOleElement;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.jfree.layouting.util.AttributeMap;
import org.jfree.report.DataFlags;
import org.jfree.report.DataRow;
import org.jfree.report.DataSourceException;
import org.jfree.report.JFreeReportInfo;
import org.jfree.report.ReportDataFactoryException;
import org.jfree.report.ReportProcessingException;
import org.jfree.report.flow.ReportTarget;
import org.jfree.report.flow.layoutprocessor.LayoutController;
import org.jfree.report.structure.Element;

public class ObjectOleLayoutController extends AbstractReportElementLayoutController
{

    @Override
    public boolean isValueChanged()
    {
        final ObjectOleElement element = (ObjectOleElement) getNode();
        final List masterfields = element.getMasterfields();
        final DataRow view = getFlowController().getMasterRow().getGlobalView();
        for (final Iterator iter = masterfields.iterator(); iter.hasNext();)
        {
            final String master = (String) iter.next();
            try
            {
                final DataFlags flags = view.getFlags(master);
                if (flags != null && flags.isChanged())
                {
                    return true;
                }
            }
            catch (DataSourceException e)
            {
                // ignore .. assume that the reference has not changed.
            }
        }
        return false;
    }

    @Override
    protected LayoutController delegateContentGeneration(final ReportTarget target) throws ReportProcessingException, ReportDataFactoryException, DataSourceException
    {
        final ObjectOleElement element = (ObjectOleElement) getNode();
        final String url = element.getUrl();
        if (url != null)
        {
            final AttributeMap ole = new AttributeMap();
            ole.setAttribute(JFreeReportInfo.REPORT_NAMESPACE, Element.NAMESPACE_ATTRIBUTE, JFreeReportInfo.REPORT_NAMESPACE);
            ole.setAttribute(JFreeReportInfo.REPORT_NAMESPACE, Element.TYPE_ATTRIBUTE, OfficeToken.OBJECT_OLE);
            ole.setAttribute(JFreeReportInfo.REPORT_NAMESPACE, "href", url);
            ole.setAttribute(JFreeReportInfo.REPORT_NAMESPACE, "class-id", element.getClassid());
            final List<String> masterfields = element.getMasterfields();
            final List<Object> values = new ArrayList<Object>();
            final DataRow view = getFlowController().getMasterRow().getGlobalView();
            for (final Iterator<String> iter = masterfields.iterator(); iter.hasNext();)
            {
                final String master = iter.next();
                try
                {
                    final DataFlags flags = view.getFlags(master);
                    if (flags != null)
                    {
                        values.add(flags.getValue());
                    }
                }
                catch (DataSourceException e)
                {
                    // ignore .. assume that the reference has not changed.
                }
            }
            ole.setAttribute(JFreeReportInfo.REPORT_NAMESPACE, SDBCReportDataFactory.MASTER_COLUMNS, masterfields);
            ole.setAttribute(JFreeReportInfo.REPORT_NAMESPACE, SDBCReportDataFactory.MASTER_VALUES, values);
            ole.setAttribute(JFreeReportInfo.REPORT_NAMESPACE, SDBCReportDataFactory.DETAIL_COLUMNS, element.getDetailfields());

            target.startElement(ole);
            target.endElement(ole);
        }

        return join(getFlowController());
    }
}

