/*

* 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.OutputStream;

import java.net.URI;

import java.util.Arrays;

import java.util.Collection;

import java.util.HashSet;

import java.util.Iterator;

import java.util.Set;

import org.eclipse.core.runtime.IProgressMonitor;

import org.eclipse.equinox.p2.core.IProvisioningAgent;

import org.eclipse.equinox.p2.engine.IProfile;

import org.eclipse.equinox.p2.engine.IProfileRegistry;

import org.eclipse.equinox.p2.metadata.IInstallableUnit;

import org.eclipse.equinox.p2.operations.ProvisioningSession;

import org.eclipse.equinox.p2.query.IQueryResult;

import org.eclipse.equinox.p2.query.QueryUtil;

import org.eclipse.equinox.p2.ui.ProvisioningUI;

class FeatureUtils {

	public static Collection<URI> getKnownRepositories() {

		ProvisioningUI provisioningUI = ProvisioningUI.getDefaultUI();

		ProvisioningSession session = provisioningUI.getSession();

		URI[] uris = provisioningUI.getRepositoryTracker().getKnownRepositories(session);

		return Arrays.asList(uris);

	}

	public static Collection<FeatureInfo> getInstalledFeatures(IProgressMonitor monitor) {

		Set<FeatureInfo> infos = new HashSet<FeatureInfo>();

		ProvisioningUI provisioningUI = ProvisioningUI.getDefaultUI();

		ProvisioningSession session = provisioningUI.getSession();

		IProvisioningAgent agent = session.getProvisioningAgent();

		IProfileRegistry profileRegistry = (IProfileRegistry) agent.getService(IProfileRegistry.SERVICE_NAME);

		IProfile profile = null;

		if (profileRegistry != null) {

			profile = profileRegistry.getProfile(provisioningUI.getProfileId());

			if (profile != null) {

				IQueryResult<IInstallableUnit> result = 

					profile.query(QueryUtil.createIUGroupQuery(), monitor);

				for (Iterator<IInstallableUnit> iterator = result.iterator(); iterator.hasNext();) {

					infos.add(new FeatureInfo((IInstallableUnit) iterator.next()));

				}

			}

		}

		return infos;

	}

	public static void writeInfosToStream(Collection<FeatureInfo> featureInfos, OutputStream os) {

		// TODO Auto-generated method stub

	}

}