/*******************************************************************************
 * Copyright (c) 2012-2014 EclipseSource Muenchen GmbH and others.
 *
 * 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:
 * Edgar Mueller - initial API and implementation
 * Edgar Mueller - Bug 445012: API to get a project by ID/Name
 ******************************************************************************/
package org.eclipse.emf.emfstore.internal.client.model.impl.api;

import java.text.MessageFormat;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import java.util.concurrent.Callable;

import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.emfstore.client.ESLocalProject;
import org.eclipse.emf.emfstore.client.ESServer;
import org.eclipse.emf.emfstore.client.ESWorkspace;
import org.eclipse.emf.emfstore.client.exceptions.ESServerNotFoundException;
import org.eclipse.emf.emfstore.client.util.RunESCommand;
import org.eclipse.emf.emfstore.internal.client.model.ProjectSpace;
import org.eclipse.emf.emfstore.internal.client.model.Workspace;
import org.eclipse.emf.emfstore.internal.client.model.exceptions.UnkownProjectException;
import org.eclipse.emf.emfstore.internal.client.model.util.EMFStoreCommandWithResult;
import org.eclipse.emf.emfstore.internal.common.APIUtil;
import org.eclipse.emf.emfstore.internal.common.api.AbstractAPIImpl;
import org.eclipse.emf.emfstore.internal.common.model.Project;
import org.eclipse.emf.emfstore.internal.common.model.util.ModelUtil;

/**
 * Mapping between {@link ESWorkspace} and {@link Workspace}.
 *
 * @author emueller
 */
public class ESWorkspaceImpl extends AbstractAPIImpl<ESWorkspaceImpl, Workspace>implements ESWorkspace {

	/**
	 * Constructor.
	 *
	 * @param workspace
	 *            the internal delegate
	 */
	public ESWorkspaceImpl(Workspace workspace) {
		super(workspace);
	}

	/**
	 *
	 * {@inheritDoc}
	 *
	 * @see org.eclipse.emf.emfstore.client.ESWorkspace#getLocalProjects()
	 */
	public List<ESLocalProject> getLocalProjects() {
		return RunESCommand.runWithResult(new Callable<List<ESLocalProject>>() {
			public List<ESLocalProject> call() throws Exception {
				return APIUtil.mapToAPI(ESLocalProject.class, toInternalAPI().getProjectSpaces());
			}
		});
	}

	/**
	 *
	 * {@inheritDoc}
	 *
	 * @see org.eclipse.emf.emfstore.client.ESWorkspace#createLocalProject(java.lang.String)
	 */
	public ESLocalProjectImpl createLocalProject(final String projectName) {
		return new EMFStoreCommandWithResult<ESLocalProjectImpl>() {
			@Override
			protected ESLocalProjectImpl doRun() {
				final ProjectSpace projectSpace = toInternalAPI().createLocalProject(projectName);
				return projectSpace.toAPI();
			}
		}.run(false);
	}

	/**
	 *
	 * {@inheritDoc}
	 *
	 * @see org.eclipse.emf.emfstore.client.ESWorkspace#getServers()
	 */
	public List<ESServer> getServers() {
		return RunESCommand.runWithResult(new Callable<List<ESServer>>() {
			public List<ESServer> call() throws Exception {
				return APIUtil.mapToAPI(ESServer.class, toInternalAPI().getServerInfos());
			}
		});
	}

	/**
	 *
	 * {@inheritDoc}
	 *
	 * @see org.eclipse.emf.emfstore.client.ESWorkspace#addServer(org.eclipse.emf.emfstore.client.ESServer)
	 */
	public ESServerImpl addServer(ESServer server) {

		final ESServerImpl serverImpl = (ESServerImpl) server;

		RunESCommand.run(new Callable<Void>() {
			public Void call() throws Exception {
				toInternalAPI().addServerInfo(serverImpl.toInternalAPI());
				return null;
			}
		});

		return serverImpl;
	}

	/**
	 * Whether a server with the same name, URL and port as the given one, exists.
	 *
	 * @param server
	 *            the server instance containing the name, URL and port to be checked for
	 * @return {@code true}, if a server with the same name, URL and port already exists, {@code false} otherwise
	 */
	public boolean serverExists(ESServer server) {
		final ESServer existingServer = getExistingServer(server);
		return existingServer != null;
	}

	/**
	 * Returns the server with the same name, URL and port as the given one, if there's any.
	 *
	 * @param server
	 *            the server for which to retrieve an already existing server instance
	 * @return the server with the same URL and port as the given one, or <code>null</code> if no such server exists.
	 */
	private ESServer getExistingServer(ESServer server) {

		for (final ESServer s : getServers()) {
			if (s == server) {
				return s;
			}
		}

		return null;
	}

	/**
	 *
	 * {@inheritDoc}
	 *
	 * @see org.eclipse.emf.emfstore.client.ESWorkspace#removeServer(org.eclipse.emf.emfstore.client.ESServer)
	 */
	public void removeServer(final ESServer server) throws ESServerNotFoundException {
		final ESServerImpl serverImpl = (ESServerImpl) server;
		final ESServerImpl existingServer = (ESServerImpl) getExistingServer(serverImpl);

		if (existingServer == null) {
			throw new ESServerNotFoundException(MessageFormat.format(
				Messages.ESWorkspaceImpl_Server_Not_Found, server));
		}

		RunESCommand.run(new Callable<Void>() {
			public Void call() throws Exception {
				toInternalAPI().removeServerInfo(existingServer.toInternalAPI());
				return null;
			}
		});
		toInternalAPI().save();
	}

	/**
	 *
	 * {@inheritDoc}
	 *
	 * @see org.eclipse.emf.emfstore.client.ESWorkspace#getLocalProject(org.eclipse.emf.ecore.EObject)
	 */
	public ESLocalProject getLocalProject(final EObject modelElement) {
		try {
			return RunESCommand.WithException.runWithResult(UnkownProjectException.class,
				new Callable<ESLocalProject>() {
					public ESLocalProject call() throws Exception {
						final Project project = ModelUtil.getProject(modelElement);
						final ProjectSpace projectSpace = toInternalAPI().getProjectSpace(project);
						return projectSpace.toAPI();
					}
				});
		} catch (final UnkownProjectException ex) {
			return null;
		}
	}

	/**
	 * Returns all projects whose name matches the supplied project name ignoring
	 * any case. This method returns a set since project names do not have to be unique
	 * in EMFStore. Furthermore, a project may have been checked-out multiple times, possibly
	 * in different versions.
	 *
	 * @param projectName
	 *            the project name
	 * @return a set of {@link ESLocalProject ESLocalProjects} that match the given name. If no such
	 *         project has been found, an empty set is returned
	 * @since 1.5
	 *
	 */
	public Set<ESLocalProject> getLocalProjectByName(String projectName) {
		final Set<ESLocalProject> projects = new LinkedHashSet<ESLocalProject>();
		final List<ESLocalProject> localProjects = getLocalProjects();
		for (final ESLocalProject localProject : localProjects) {
			if (localProject.getProjectName().equalsIgnoreCase(projectName)) {
				projects.add(localProject);
			}
		}
		return projects;
	}

}