/*!
* 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.designer.core.editor.expressions;

import org.pentaho.reporting.designer.core.ReportDesignerContext;
import org.pentaho.reporting.designer.core.editor.ReportDocumentContext;
import org.pentaho.reporting.designer.core.model.selection.DocumentContextSelectionModel;
import org.pentaho.reporting.designer.core.util.SidePanel;
import org.pentaho.reporting.designer.core.util.table.ElementMetaDataTable;
import org.pentaho.reporting.designer.core.util.table.GroupedMetaTableModel;
import org.pentaho.reporting.designer.core.util.table.GroupedNameCellRenderer;
import org.pentaho.reporting.designer.core.util.table.SortHeaderPanel;
import org.pentaho.reporting.engine.classic.core.function.Expression;

import javax.swing.*;
import javax.swing.table.TableCellEditor;
import java.awt.*;
import java.util.List;

public class ExpressionPropertiesEditorPanel extends SidePanel {
  private ExpressionPropertiesTableModel dataModel;
  private ElementMetaDataTable table;

  private static final Expression[] EMPTY_EXPRESSIONS = new Expression[ 0 ];
  private SortHeaderPanel headerPanel;

  public ExpressionPropertiesEditorPanel() {
    setLayout( new BorderLayout() );

    dataModel = new ExpressionPropertiesTableModel();

    table = new ElementMetaDataTable();
    table.setModel( new GroupedMetaTableModel( dataModel ) );
    table.getColumnModel().getColumn( 0 ).setCellRenderer( new GroupedNameCellRenderer() );

    headerPanel = new SortHeaderPanel( dataModel );

    add( headerPanel, BorderLayout.NORTH );
    add( new JScrollPane( table ), BorderLayout.CENTER );
  }

  public Expression[] getData() {
    return dataModel.getData();
  }

  public void setData( final Expression[] elements ) {
    stopEditing();

    dataModel.setData( elements );
  }

  public void stopEditing() {
    final TableCellEditor tableCellEditor = table.getCellEditor();
    if ( tableCellEditor != null ) {
      tableCellEditor.stopCellEditing();
    }
  }

  protected void updateDesignerContext( final ReportDesignerContext oldContext,
                                        final ReportDesignerContext newContext ) {
    super.updateDesignerContext( oldContext, newContext );
    table.setReportDesignerContext( newContext );
  }

  protected void updateSelection( final DocumentContextSelectionModel model ) {
    if ( model == null ) {
      setData( EMPTY_EXPRESSIONS );
    } else {
      final List<Expression> filter = model.getSelectedElementsOfType( Expression.class );
      setData( filter.toArray( new Expression[ filter.size() ] ) );
    }
  }

  protected void updateActiveContext( final ReportDocumentContext oldContext, final ReportDocumentContext newContext ) {
    stopEditing();

    super.updateActiveContext( oldContext, newContext );
    dataModel.setActiveContext( newContext );
    if ( newContext == null ) {
      setData( EMPTY_EXPRESSIONS );
    }
  }

  public void setEnabled( final boolean enabled ) {
    super.setEnabled( enabled );
    table.setEnabled( enabled );
    headerPanel.setEnabled( enabled );
  }
}