/*

* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

*

*/

package com.nokia.carbide.internal.discovery.ui.wizard;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.OutputStream;

import java.net.URI;

import java.net.URL;

import java.text.MessageFormat;

import java.util.ArrayList;

import java.util.Collection;

import java.util.Collections;

import org.eclipse.core.runtime.IPath;

import org.eclipse.core.runtime.NullProgressMonitor;

import org.eclipse.core.runtime.Path;

import org.eclipse.core.runtime.Platform;

import org.eclipse.jface.dialogs.MessageDialog;

import org.eclipse.jface.viewers.IStructuredSelection;

import org.eclipse.jface.wizard.Wizard;

import org.eclipse.osgi.service.datalocation.Location;

import org.eclipse.ui.IExportWizard;

import org.eclipse.ui.IWorkbench;

import com.nokia.carbide.discovery.ui.Activator;

import com.nokia.carbide.discovery.ui.Messages;

/**

 * Wizard for exporting installed features to a file

 */

public class ExportWizard extends Wizard implements IExportWizard {

	private ExportPage exportPage;

	public ExportWizard() {

	}

	public boolean performFinish() {

		Collection<FeatureInfo> featureInfos = exportPage.getFeatureInfos();

		File file = exportPage.getFile();

		OutputStream os;

		try {

			os = new FileOutputStream(file);

			ImportExportData data = new ImportExportData(false, P2Utils.getKnownRepositories(), featureInfos);

			Streamer.writeToXML(os, data);

		} catch (Exception e) {

			MessageDialog.openError(getShell(), Messages.ExportWizard_ErrorTitle, 

					MessageFormat.format(Messages.ExportWizard_WriteFileError, e.getMessage()));

		}

		return true;

	}

	public void init(IWorkbench workbench, IStructuredSelection selection) {

		setDefaultPageImageDescriptor(Activator.getImageDescriptor("icons\\install_wiz.gif")); //$NON-NLS-1$

		setWindowTitle(Messages.ExportWizard_Title);

		exportPage = new ExportPage(getFilteredFeatureIds());

		addPage(exportPage);

	}

	private Collection<String> getFilteredFeatureIds() {

		Collection<FeatureInfo> installedFeatures = null;

		Location installLocation = Platform.getInstallLocation();

		URL url = installLocation.getURL();

		IPath path = new Path(url.getPath());

		path = path.append("configuration/installedFeatures.xml"); //$NON-NLS-1$

		File file = path.toFile();

		if (!file.exists()) {

			installedFeatures = P2Utils.getInstalledFeatures(new NullProgressMonitor());

			ImportExportData data = new ImportExportData(false, Collections.<URI>emptyList(), installedFeatures);

			try {

				Streamer.writeToXML(new FileOutputStream(file), data);

			} catch (Exception e) {

			}

		}

		else {

			try {

				ImportExportData data = Streamer.readFromXML(new FileInputStream(file));

				installedFeatures = data.getFeatureInfos();

			} catch (Exception e) {

			}

		}

		Collection<String> filteredIds = new ArrayList<String>();

		if (installedFeatures != null) {

			for (FeatureInfo featureInfo : installedFeatures) {

				filteredIds.add(featureInfo.getId());

			}

		}

		return filteredIds;

	}

}