/*

 * JBoss, Home of Professional Open Source

 * Copyright 2011, Red Hat, Inc. and individual contributors by the

 * @authors tag. See the copyright.txt in the distribution for a

 * full listing of individual contributors.

 *

 * This is free software; you can redistribute it and/or modify it

 * under the terms of the GNU Lesser General Public License as

 * published by the Free Software Foundation; either version 2.1 of

 * the License, or (at your option) any later version.

 *

 * This software 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.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this software; if not, write to the Free

 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA

 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.

 */

package org.mobicents.eclipslee.servicecreation.popup.actions;



import java.io.InputStreamReader;



import org.apache.maven.model.Model;

import org.apache.maven.model.io.xpp3.MavenXpp3Reader;

import org.eclipse.core.resources.IFile;

import org.eclipse.core.resources.IProject;

import org.eclipse.jface.action.IAction;

import org.eclipse.jface.action.IMenuCreator;

import org.eclipse.jface.viewers.ISelection;

import org.eclipse.jface.viewers.IStructuredSelection;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.MenuAdapter;

import org.eclipse.swt.events.MenuEvent;

import org.eclipse.swt.events.SelectionAdapter;

import org.eclipse.swt.events.SelectionEvent;

import org.eclipse.swt.widgets.Control;

import org.eclipse.swt.widgets.Menu;

import org.eclipse.swt.widgets.MenuItem;

import org.eclipse.ui.IObjectActionDelegate;

import org.eclipse.ui.IWorkbenchPart;

import org.mobicents.eclipslee.servicecreation.ServiceCreationPlugin;



/**

 * 

 * @author <a href="mailto:brainslog@gmail.com"> Alexandre Mendonca </a>

 */

public class DeleteModuleSubmenu implements IObjectActionDelegate, IMenuCreator {

	

	public DeleteModuleSubmenu() {

		super();

	}

	

	public void run(IAction action) {

	}

	

	public void setActivePart(IAction action, IWorkbenchPart targetPart) {

	}

	

	public void dispose() {	

	}

	

	public void selectionChanged(IAction action, ISelection selection) {

		

		if (selection instanceof IStructuredSelection) {

			

			fFillMenu = true;

			if (action != null) {

				if (fDelegateAction != action) {

					fDelegateAction = action;

					fDelegateAction.setMenuCreator(this);

				}

				

				this.selection = selection;

				action.setEnabled(true);

				return;				

			}

			return;		

		}

		action.setEnabled(false);	

	}

	

	public Menu getMenu(Control control) { return null; } // NOP

	

	public Menu getMenu(Menu parent) {

		Menu menu = new Menu(parent);

		menu.addMenuListener(new MenuAdapter() {

			public void menuShown(MenuEvent e) {

				if (fFillMenu) {

					Menu m = (Menu) e.widget;

					MenuItem items[] = m.getItems();

					for (int i= 0; i < items.length; i++)

						items[i].dispose();

					fillMenu(m);

					fFillMenu = false;					

				}

			}		

		});

		

		return menu;

	}

	

	private void fillMenu(Menu menu) {

		createModulesMenus(menu);

	}

	

	private void createModulesMenus(Menu parent) {

		

		if (selection == null && selection.isEmpty()) {

			return;

		}

		

		if (!(selection instanceof IStructuredSelection)) {

			return;			

		}

		

		IStructuredSelection ssel = (IStructuredSelection) selection;

		if (ssel.size() > 1) {

			return;

		}

		

		// Get the first (and only) item in the selection.

		Object obj = ssel.getFirstElement();

		

		// project selected.

		if (obj instanceof IProject) {

			try {

			  IProject project = (IProject) obj;

			  IFile parentPom = project.getFile("pom.xml");

			  

			  MavenXpp3Reader reader = new MavenXpp3Reader();

			  Model model = reader.read(new InputStreamReader(parentPom.getContents()));



			  for(String module : model.getModules()) {

	        if(!module.equals("du")) {

	          MenuItem item = new MenuItem(parent, SWT.NONE);

	          item.setText(module);

	          item.addSelectionListener(new DeleteSelectionListener());

	        }

			  }

			} catch (Exception e) {

				ServiceCreationPlugin.log("Exception caught creating menu: " + e.getMessage());

			}

			

		}

		

	}

	

	private class DeleteSelectionListener extends SelectionAdapter {

		public void widgetSelected(SelectionEvent e) {

			MenuItem item = (MenuItem) e.getSource();

			

			DeleteModuleAction action = new DeleteModuleAction(item.getText());

			action.selectionChanged(null, selection);

			action.run(null);			

		}	

	}

	

	private IAction fDelegateAction;

	private ISelection selection;

	private boolean fFillMenu;

}