/*!
* 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.actions.elements.format;

import org.pentaho.reporting.designer.core.actions.AbstractElementSelectionAction;
import org.pentaho.reporting.designer.core.actions.ActionMessages;
import org.pentaho.reporting.designer.core.actions.ToggleStateAction;
import org.pentaho.reporting.designer.core.model.selection.DocumentContextSelectionModel;
import org.pentaho.reporting.designer.core.util.IconLoader;
import org.pentaho.reporting.designer.core.util.undo.CompoundUndoEntry;
import org.pentaho.reporting.designer.core.util.undo.StyleEditUndoEntry;
import org.pentaho.reporting.designer.core.util.undo.UndoEntry;
import org.pentaho.reporting.engine.classic.core.Element;
import org.pentaho.reporting.engine.classic.core.ElementAlignment;
import org.pentaho.reporting.engine.classic.core.designtime.ReportModelEventFilter;
import org.pentaho.reporting.engine.classic.core.designtime.ReportModelEventFilterFactory;
import org.pentaho.reporting.engine.classic.core.event.ReportModelEvent;
import org.pentaho.reporting.engine.classic.core.style.ElementStyleKeys;
import org.pentaho.reporting.engine.classic.core.style.ElementStyleSheet;

import javax.swing.*;
import java.awt.event.ActionEvent;
import java.util.ArrayList;
import java.util.List;

public final class TextAlignmentRightAction extends AbstractElementSelectionAction implements ToggleStateAction {
  private final ReportModelEventFilter eventFilter;

  public TextAlignmentRightAction() {
    putValue( Action.NAME, ActionMessages.getString( "TextAlignmentRightAction.Text" ) );
    putValue( Action.SHORT_DESCRIPTION, ActionMessages.getString( "TextAlignmentRightAction.Description" ) );
    putValue( Action.MNEMONIC_KEY, ActionMessages.getOptionalMnemonic( "TextAlignmentRightAction.Mnemonic" ) );
    putValue( Action.SMALL_ICON, IconLoader.getInstance().getTextAlignRightCommand() );
    putValue( Action.ACCELERATOR_KEY, ActionMessages.getOptionalKeyStroke( "TextAlignmentRightAction.Accelerator" ) );
    putValue( Action.SELECTED_KEY, Boolean.FALSE );

    eventFilter = new ReportModelEventFilterFactory().createStyleFilter( ElementStyleKeys.ALIGNMENT );
  }

  protected void selectedElementPropertiesChanged( final ReportModelEvent event ) {
    if ( eventFilter.isFilteredEvent( event ) ) {
      updateSelection();
    }
  }

  public boolean isSelected() {
    return Boolean.TRUE.equals( getValue( Action.SELECTED_KEY ) );
  }

  public void setSelected( final boolean selected ) {
    putValue( Action.SELECTED_KEY, selected );
  }

  protected void updateSelection() {
    super.updateSelection();

    final DocumentContextSelectionModel model = getSelectionModel();
    if ( model == null ) {
      return;
    }
    final List<Element> visualElements = model.getSelectedElementsOfType( Element.class );
    if ( visualElements.isEmpty() ) {
      setSelected( false );
      return;
    }

    final Element element = visualElements.get( 0 );
    final ElementStyleSheet styleSheet = element.getStyle();
    setSelected( ElementAlignment.RIGHT.equals( styleSheet.getStyleProperty( ElementStyleKeys.ALIGNMENT ) ) );
  }


  /**
   * Invoked when an action occurs.
   */
  public void actionPerformed( final ActionEvent e ) {
    final DocumentContextSelectionModel model = getSelectionModel();
    if ( model == null ) {
      return;
    }
    final List<Element> visualElements = model.getSelectedElementsOfType( Element.class );
    final ArrayList<UndoEntry> undos = new ArrayList<UndoEntry>();
    for ( Element element : visualElements ) {
      final ElementStyleSheet styleSheet = element.getStyle();
      undos.add( StyleEditUndoEntry.createConditional( element, ElementStyleKeys.ALIGNMENT, ElementAlignment.RIGHT ) );
      styleSheet.setStyleProperty( ElementStyleKeys.ALIGNMENT, ElementAlignment.RIGHT );
      element.notifyNodePropertiesChanged();
    }
    getActiveContext().getUndo().addChange( ActionMessages.getString( "TextAlignmentRightAction.UndoName" ),
      new CompoundUndoEntry( undos.toArray( new UndoEntry[ undos.size() ] ) ) );
  }
}