/*!
 * This program is free software; you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
 * Foundation.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
 * or from the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * This program 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.
 *
 * Copyright (c) 2002-2013 Pentaho Corporation..  All rights reserved.
 */

package org.pentaho.reporting.platform.plugin;

import java.io.InputStream;
import java.util.HashMap;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.pentaho.platform.api.engine.IFileInfo;
import org.pentaho.platform.api.engine.ILogger;
import org.pentaho.platform.api.engine.ISolutionFile;
import org.pentaho.platform.api.engine.SolutionFileMetaAdapter;
import org.pentaho.platform.engine.core.solution.FileInfo;
import org.pentaho.reporting.engine.classic.core.ClassicEngineBoot;
import org.pentaho.reporting.libraries.base.util.StringUtils;
import org.pentaho.reporting.libraries.docbundle.DocumentBundle;
import org.pentaho.reporting.libraries.docbundle.DocumentMetaData;
import org.pentaho.reporting.libraries.docbundle.ODFMetaAttributeNames;
import org.pentaho.reporting.libraries.resourceloader.Resource;
import org.pentaho.reporting.libraries.resourceloader.ResourceException;
import org.pentaho.reporting.libraries.resourceloader.ResourceKey;
import org.pentaho.reporting.libraries.resourceloader.ResourceManager;
import org.pentaho.reporting.platform.plugin.messages.Messages;

public class ReportFileMetaDataProvider extends SolutionFileMetaAdapter {
  private static final Log logger = LogFactory.getLog( ReportFileMetaDataProvider.class );

  public ReportFileMetaDataProvider() {
  }

  public void setLogger( final ILogger logger ) {
  }

  private DocumentMetaData loadMetaData( final String reportDefinitionPath ) throws ResourceException {
    final ResourceManager resourceManager = new ResourceManager();
    resourceManager.registerDefaults();
    final HashMap helperObjects = new HashMap();
    // add the runtime context so that PentahoResourceData class can get access
    // to the solution repo
    final ResourceKey key =
        resourceManager.createKey( RepositoryResourceLoader.SOLUTION_SCHEMA_NAME
            + RepositoryResourceLoader.SCHEMA_SEPARATOR + reportDefinitionPath, helperObjects );
    final Resource resource = resourceManager.create( key, null, DocumentBundle.class );
    final DocumentBundle bundle = (DocumentBundle) resource.getResource();
    return bundle.getMetaData();
  }

  public IFileInfo getFileInfo( final ISolutionFile solutionFile, final InputStream in ) {
    try {
      final DocumentMetaData metaData =
          loadMetaData( solutionFile.getSolutionPath() + "/" + solutionFile.getFileName() ); //$NON-NLS-1$
      final String title =
          (String) metaData.getBundleAttribute( ODFMetaAttributeNames.DublinCore.NAMESPACE,
              ODFMetaAttributeNames.DublinCore.TITLE );
      final String author =
          (String) metaData.getBundleAttribute( ODFMetaAttributeNames.DublinCore.NAMESPACE,
              ODFMetaAttributeNames.DublinCore.CREATOR );
      final String description =
          (String) metaData.getBundleAttribute( ODFMetaAttributeNames.DublinCore.NAMESPACE,
              ODFMetaAttributeNames.DublinCore.DESCRIPTION );
      final IFileInfo fileInfo = new FileInfo();
      if ( StringUtils.isEmpty( title ) ) {
        fileInfo.setTitle( solutionFile.getFileName() );
      } else {
        fileInfo.setTitle( title );
      }
      fileInfo.setAuthor( author ); //$NON-NLS-1$
      fileInfo.setDescription( description );

      // displaytype is a magical constant defined in a internal class of the platform.
      if ( "false".equals( metaData.getBundleAttribute( ClassicEngineBoot.METADATA_NAMESPACE, "visible" ) ) ) {
        fileInfo.setDisplayType( "none" ); // NON-NLS
      } else {
        fileInfo.setDisplayType( "report" ); // NON-NLS
      }
      return fileInfo;
    } catch ( Exception e ) {
      logger.warn( Messages.getInstance().getString( "ReportPlugin.errorMetadataNotReadable" ), e );
      return null;
    }
  }

}