/*******************************************************************************
 * Copyright (c) 2004-2008 Istvan Rath and Daniel Varro
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Istvan Rath - initial API and implementation
 *******************************************************************************/

 package org.eclipse.viatra2.treeeditor.actions;

import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Iterator;




import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.FileDialog;
import org.eclipse.ui.ISharedImages;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.PlatformUI;
import org.eclipse.viatra2.core.IEntity;
import org.eclipse.viatra2.core.IModelElement;
import org.eclipse.viatra2.core.IModelSpace;
import org.eclipse.viatra2.exports.VTMLExporterSimple;
import org.eclipse.viatra2.treeeditor.ViatraTreeEditor;

public class ExportToVTMLAction extends ViatraTreeEditorSelectionAction {

	public static final String ID = "ViatraTreeEditor.Actions.ExportToVTMLAction";

	private ViatraTreeEditor iVTE;

	public ExportToVTMLAction(IWorkbenchPart part) {
		super(part);
		iVTE = (ViatraTreeEditor) part;
		setId(ID);
		setText("Export as VTML");
		setToolTipText("Export selected model element as VTML");
		setImageDescriptor(PlatformUI.getWorkbench().getSharedImages()
				.getImageDescriptor(ISharedImages.IMG_OBJ_FILE));
	}

	protected boolean calculateEnabled() {
		return true;
	}

	public void run() {
		FileDialog fop = new FileDialog(iVTE.getEditorSite().getShell(),
				SWT.SAVE);
		fop.setText("Choose a file to export to");
		fop.setFilterNames(new String[] { "Viatra VTML files" });
		String fn = fop.open();
		if (fn != null) {
			Iterator it = getSelectedObjects().iterator();
			FileWriter fw;
			try {
				fw = new FileWriter(fn, false);
			} catch (IOException e) {
				e.printStackTrace();
				return;
			}
			PrintWriter pw = new PrintWriter(fw);
			IModelSpace ms = iVTE.getFramework().getTopmodel();
			
			while (it.hasNext()) {
				
				try {
					IModelElement me = (IModelElement) it.next();
					VTMLExporterSimple.exportToVTML(pw, ms, me);
				} catch (Exception ex) {
					ex.printStackTrace();
				}
			}
			pw.close();
			try {
				fw.close();
			} catch (IOException ioex) {
				ioex.printStackTrace();
			}
			iVTE.showMessage("Export to " + fn + " successful");
		}
	}

	@Override
	public void updateSelf() {
		if (getSelectedObjects().size() == 1 && getSelectedObjects().getFirstElement() instanceof IEntity)
			setEnabled(true);
		else
			setEnabled(false);
	}

}