/*
 * Copyright (C) 2007-2012 Argeo GmbH
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.argeo.slc.client.ui.dist.commands;

import javax.jcr.Binary;
import javax.jcr.Node;
import javax.jcr.NodeIterator;
import javax.jcr.Property;
import javax.jcr.Repository;
import javax.jcr.RepositoryException;
import javax.jcr.Session;
import javax.jcr.nodetype.NodeType;
import javax.jcr.query.Query;
import javax.jcr.query.QueryResult;
import javax.jcr.util.TraversingItemVisitor;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.argeo.ArgeoMonitor;
import org.argeo.eclipse.ui.EclipseArgeoMonitor;
import org.argeo.eclipse.ui.dialogs.SingleValue;
import org.argeo.jcr.JcrUtils;
import org.argeo.slc.NameVersion;
import org.argeo.slc.SlcException;
import org.argeo.slc.aether.AetherUtils;
import org.argeo.slc.client.ui.dist.DistPlugin;
import org.argeo.slc.jcr.SlcNames;
import org.argeo.slc.jcr.SlcTypes;
import org.argeo.slc.repo.ArtifactIndexer;
import org.argeo.slc.repo.JarFileIndexer;
import org.argeo.slc.repo.RepoUtils;
import org.argeo.slc.repo.maven.MavenConventionsUtils;
import org.argeo.slc.repo.osgi.NormalizeGroup;
import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.sonatype.aether.artifact.Artifact;
import org.sonatype.aether.util.artifact.DefaultArtifact;

/** Make sure than Maven and OSGi metadata are consistent */
public class NormalizeDistribution extends AbstractHandler implements SlcNames {
	public final static String ID = DistPlugin.ID + ".normalizeDistribution";
	public final static String PARAM_WORKSPACE = "workspace";
	public final static String DEFAULT_LABEL = "Normalize";
	public final static String DEFAULT_ICON_PATH = "icons/addItem.gif";

	private final static Log log = LogFactory
			.getLog(NormalizeDistribution.class);

	private Repository repository;
	private String artifactBasePath = "/";

	private ArtifactIndexer artifactIndexer = new ArtifactIndexer();
	private JarFileIndexer jarFileIndexer = new JarFileIndexer();

	public Object execute(ExecutionEvent event) throws ExecutionException {
		String workspace = event.getParameter(PARAM_WORKSPACE);
		String version = SingleValue.ask("Version",
				"Enter Distribution Version");
		if (version == null)
			return null;

		NormalizeJob job;
		try {
			job = new NormalizeJob(repository.login(workspace), version);
		} catch (RepositoryException e) {
			throw new SlcException("Cannot normalize " + workspace, e);
		}
		job.setUser(true);
		job.schedule();
		return null;
	}

	protected void packageSourcesAsPdeSource(Node sourcesNode) {
		Binary origBinary = null;
		Binary osgiBinary = null;
		try {
			Session session = sourcesNode.getSession();
			Artifact sourcesArtifact = AetherUtils.convertPathToArtifact(
					sourcesNode.getPath(), null);

			// read name version from manifest
			Artifact osgiArtifact = new DefaultArtifact(
					sourcesArtifact.getGroupId(),
					sourcesArtifact.getArtifactId(),
					sourcesArtifact.getExtension(),
					sourcesArtifact.getVersion());
			String osgiPath = MavenConventionsUtils.artifactPath(
					artifactBasePath, osgiArtifact);
			osgiBinary = session.getNode(osgiPath).getNode(Node.JCR_CONTENT)
					.getProperty(Property.JCR_DATA).getBinary();

			NameVersion nameVersion = RepoUtils.readNameVersion(osgiBinary
					.getStream());

			// create PDe sources artifact
			Artifact pdeSourceArtifact = new DefaultArtifact(
					sourcesArtifact.getGroupId(),
					sourcesArtifact.getArtifactId() + ".source",
					sourcesArtifact.getExtension(),
					sourcesArtifact.getVersion());
			String targetSourceParentPath = MavenConventionsUtils
					.artifactParentPath(artifactBasePath, pdeSourceArtifact);
			String targetSourceFileName = MavenConventionsUtils
					.artifactFileName(pdeSourceArtifact);
			String targetSourceJarPath = targetSourceParentPath + '/'
					+ targetSourceFileName;

			Node targetSourceParentNode = JcrUtils.mkfolders(session,
					targetSourceParentPath);
			origBinary = sourcesNode.getNode(Node.JCR_CONTENT)
					.getProperty(Property.JCR_DATA).getBinary();
			byte[] targetJarBytes = RepoUtils.packageAsPdeSource(
					origBinary.getStream(), nameVersion);
			JcrUtils.copyBytesAsFile(targetSourceParentNode,
					targetSourceFileName, targetJarBytes);

			// reindex
			Node targetSourceJarNode = session.getNode(targetSourceJarPath);
			artifactIndexer.index(targetSourceJarNode);
			jarFileIndexer.index(targetSourceJarNode);
		} catch (RepositoryException e) {
			throw new SlcException("Cannot add PDE sources for " + sourcesNode,
					e);
		} finally {
			JcrUtils.closeQuietly(origBinary);
			JcrUtils.closeQuietly(osgiBinary);
		}

	}

	public void setRepository(Repository repository) {
		this.repository = repository;
	}

	private class NormalizeJob extends Job {
		private Session session;
		private String version;

		public NormalizeJob(Session session, String version) {
			super("Normalize Distribution");
			this.session = session;
			this.version = version;
		}

		@Override
		protected IStatus run(IProgressMonitor progressMonitor) {

			try {
				ArgeoMonitor monitor = new EclipseArgeoMonitor(progressMonitor);
				// normalize artifacts
				Query countQuery = session
						.getWorkspace()
						.getQueryManager()
						.createQuery("select file from [nt:file] as file",
								Query.JCR_SQL2);
				QueryResult result = countQuery.execute();
				Long expectedCount = result.getNodes().getSize();
				monitor.beginTask("Normalize artifacts of "
						+ session.getWorkspace().getName(),
						expectedCount.intValue());
				NormalizingTraverser tiv = new NormalizingTraverser(monitor);
				session.getNode(artifactBasePath).accept(tiv);

				// normalize groups
				Query groupQuery = session
						.getWorkspace()
						.getQueryManager()
						.createQuery(
								"select group from [" + SlcTypes.SLC_GROUP_BASE
										+ "] as group", Query.JCR_SQL2);
				NodeIterator groups = groupQuery.execute().getNodes();
				monitor.beginTask("Normalize groups of "
						+ session.getWorkspace().getName(),
						(int) groups.getSize());
				while (groups.hasNext()) {
					NormalizeGroup normalizeGroup = new NormalizeGroup();
					normalizeGroup.setArtifactBasePath(artifactBasePath);
					normalizeGroup.processGroupNode(groups.nextNode(), version,
							monitor);
				}
			} catch (Exception e) {
				return new Status(IStatus.ERROR, DistPlugin.ID,
						"Cannot normalize distribution "
								+ session.getWorkspace().getName(), e);
			} finally {
				JcrUtils.logoutQuietly(session);
			}
			return Status.OK_STATUS;
		}

	}

	private class NormalizingTraverser extends TraversingItemVisitor {
		ArgeoMonitor monitor;

		public NormalizingTraverser(ArgeoMonitor monitor) {
			super();
			this.monitor = monitor;
		}

		@Override
		protected void entering(Property property, int level)
				throws RepositoryException {
		}

		@Override
		protected void entering(Node node, int level)
				throws RepositoryException {
			if (node.isNodeType(NodeType.NT_FILE)) {
				if (node.getName().endsWith("-sources.jar")) {
					monitor.subTask(node.getName());
					packageSourcesAsPdeSource(node);
					node.getSession().save();
					monitor.worked(1);
					if (log.isDebugEnabled())
						log.debug("Processed source artifact " + node.getPath());
				} else if (node.getName().endsWith(".jar")) {
					if (jarFileIndexer.support(node.getPath()))
						if (artifactIndexer.support(node.getPath())) {
							monitor.subTask(node.getName());
							artifactIndexer.index(node);
							jarFileIndexer.index(node);
							node.getSession().save();
							monitor.worked(1);
							if (log.isDebugEnabled())
								log.debug("Processed artifact "
										+ node.getPath());
						}
				} else {
					monitor.worked(1);
				}
			}
		}

		@Override
		protected void leaving(Property property, int level)
				throws RepositoryException {
		}

		@Override
		protected void leaving(Node node, int level) throws RepositoryException {
		}

	}
}