/*
 *                 Sun Public License Notice
 *
 * The contents of this file are subject to the Sun Public License
 * Version 1.0 (the "License"). You may not use this file except in
 * compliance with the License. A copy of the License is available at
 * http://www.sun.com/
 *
 * The Original Code is NetBeans. The Initial Developer of the Original
 * Code is Sun Microsystems, Inc. Portions Copyright 1997-2004 Sun
 * Microsystems, Inc. All Rights Reserved.
 */

package org.netbeans.modules.project.ui.actions;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.Arrays;
import javax.swing.AbstractAction;
import javax.swing.ImageIcon;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JRadioButtonMenuItem;
import org.netbeans.api.project.Project;
import org.netbeans.api.project.ProjectUtils;
import org.netbeans.modules.project.ui.OpenProjectList;
import org.netbeans.api.project.ProjectInformation;
import org.openide.util.NbBundle;
import org.openide.util.Utilities;
import org.openide.util.actions.Presenter;

public class SetMainProject extends AbstractAction implements Presenter.Menu, PropertyChangeListener {
    
    private static final String ICON = "org/netbeans/modules/project/ui/resources/empty.gif"; //NOI18N    
    
    /** Key for remembering project in JMenuItem
     */
    private static final String PROJECT_KEY = "org.netbeans.modules.project.ui.MainProjectItem"; // NOI18N
    
    private JMenu subMenu;
    
    /** Creates a new instance of BrowserAction */
    public SetMainProject() {
        super( NbBundle.getMessage( SetMainProject.class, "LBL_SetMainProjectAction_Name" ),   // NOI18N
               null );
        OpenProjectList.getDefault().addPropertyChangeListener( this );
    }
    
        
    /** Perform the action. Tries the performer and then scans the ActionMap
     * of selected topcomponent.
     */
    public void actionPerformed(java.awt.event.ActionEvent ev) {
        // no operation
    }
    
    public JMenuItem getMenuPresenter() {
        createSubMenu();
        return subMenu;
    }
        
    private void createSubMenu() {
        
        Project projects[] = OpenProjectList.getDefault().getOpenProjects();
        
        Arrays.sort( projects, OpenProjectList.PROJECT_BY_DISPLAYNAME );
        
        // Enable disable the action according to number of open projects
        if ( projects == null || projects.length == 0 ) {
            setEnabled( false );
        }
        else {
            setEnabled( true );
        }
        
        if ( subMenu == null ) {
            String label = NbBundle.getMessage( SetMainProject.class, "LBL_SetMainProjectAction_Name" ); // NOI18N
            subMenu = new JMenu( label );
            subMenu.setMnemonic (NbBundle.getMessage (SetMainProject.class, "MNE_SetMainProjectAction_Name").charAt (0)); // NOI18N
            subMenu.setIcon( new ImageIcon( Utilities.loadImage( ICON ) ) );
        }
        
        subMenu.removeAll();
        ActionListener jmiActionListener = new MenuItemActionListener(); 
        
        
        // Fill menu with items
        for ( int i = 0; i < projects.length; i++ ) {
            ProjectInformation pi = ProjectUtils.getInformation(projects[i]);
            JRadioButtonMenuItem jmi = new JRadioButtonMenuItem(pi.getDisplayName(), pi.getIcon(), false);
            subMenu.add( jmi );
            jmi.putClientProperty( PROJECT_KEY, projects[i] );
            jmi.addActionListener( jmiActionListener );
        }

        // Set main project
        selectMainProject();
        
        subMenu.setEnabled( projects.length > 0 );
        
    }
    
    private void selectMainProject() {
        
        for( int i = 0; i < subMenu.getItemCount(); i++ ) {
            JMenuItem jmi = subMenu.getItem( i );
            Project project = (Project)jmi.getClientProperty( PROJECT_KEY );
            
            if ( jmi instanceof JRadioButtonMenuItem ) {
                if ( OpenProjectList.getDefault().isMainProject( project ) ) {
                    ((JRadioButtonMenuItem)jmi).setSelected( true );                    
                }   
                else {
                    ((JRadioButtonMenuItem)jmi).setSelected( false );                    
                }
            }    
        }
        
    }
    
    // Implementation of change listener ---------------------------------------
    
    
    public void propertyChange( PropertyChangeEvent e ) {
        
        if ( OpenProjectList.PROPERTY_OPEN_PROJECTS.equals( e.getPropertyName() ) ) {
            createSubMenu();
        }
        else if ( OpenProjectList.PROPERTY_MAIN_PROJECT.equals( e.getPropertyName() ) ) {
            selectMainProject();
        }
        
        
    }
    
    // Innerclasses ------------------------------------------------------------
    
    private static class MenuItemActionListener implements ActionListener {
        
        public void actionPerformed( ActionEvent e ) {
            
            if ( e.getSource() instanceof JMenuItem ) {
                JMenuItem jmi = (JMenuItem)e.getSource();
                Project project = (Project)jmi.getClientProperty( PROJECT_KEY );
                if ( project != null ) {
                    OpenProjectList.getDefault().setMainProject( project );
                }
                
            }
            
        }
        
    }
    
}