/*****************************************************************************
 * Copyright (c) 2011 CEA LIST.
 * 
 * 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:
 *  Vincent Lorenzo (CEA LIST) vincent.lorenzo@cea.fr - Initial API and implementation
 *****************************************************************************/
package org.eclipse.papyrus.uml.importt.handlers;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;

import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.window.Window;
import org.eclipse.papyrus.uml.extensionpoints.profile.FilteredRegisteredProfilesAsLibrarySelectionDialog;
import org.eclipse.papyrus.uml.extensionpoints.profile.RegisteredProfile;
import org.eclipse.papyrus.uml.extensionpoints.utils.Util;
import org.eclipse.papyrus.uml.profile.ui.dialogs.ProfileTreeSelectionDialog;
import org.eclipse.papyrus.uml.tools.utils.PackageUtil;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.PlatformUI;
import org.eclipse.uml2.uml.Element;
import org.eclipse.uml2.uml.Package;
import org.eclipse.uml2.uml.PackageImport;
import org.eclipse.uml2.uml.UMLFactory;



public class ImportRegisteredProfileHandler extends AbstractImportHandler {

	/**
	 * 
	 * {@inheritDoc}
	 */
	@Override
	protected Command getCommand() {
		return new ImportProfileCommand();
	}


	/**
	 * 
	 * The command to import profiles in the the model
	 * 
	 */
	public class ImportProfileCommand extends AbstractImportCommand {

		/**
		 * 
		 * Constructor.
		 * 
		 * @param editingDomain
		 *        the editing domain
		 */
		public ImportProfileCommand() {
			super(new Runnable() {

				public void run() {
					// Retrieve shell instance
					Shell shell = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell();

					// get the set of registered libraries available
					RegisteredProfile[] allProfiles = RegisteredProfile.getRegisteredProfiles();

					// Open Registered ModelLibrary selection dialog
					FilteredRegisteredProfilesAsLibrarySelectionDialog dialog = new FilteredRegisteredProfilesAsLibrarySelectionDialog(shell, true, allProfiles, getImportedProfiles());
					dialog.open();
					if(Dialog.OK == dialog.getReturnCode()) {
						// get the result, which is the set of libraries to import
						List<Object> profilesToImport = Arrays.asList(dialog.getResult());
						importProfiles(profilesToImport.toArray(new RegisteredProfile[profilesToImport.size()]));
					}
				}
			}, "Import Profile", "Import Profile from Registred Profiles"); //$NON-NLS-1$ //$NON-NLS-2$
		}
	}

	/**
	 * Import the profiles in the model.
	 * 
	 * @param profilesToImport
	 *        the profiles to import
	 */
	protected void importProfiles(RegisteredProfile[] profilesToImport) {

		// retrieve the current resource set
		ResourceSet resourceSet = Util.getResourceSet(getSelectedElement());

		for(int i = 0; i < profilesToImport.length; i++) {
			RegisteredProfile currentLibrary = (profilesToImport[i]);
			URI modelUri = currentLibrary.uri;

			Resource modelResource = resourceSet.getResource(modelUri, true);
			//			PackageImportTreeSelectionDialog dialog = new PackageImportTreeSelectionDialog(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell(), ((Package)modelResource.getContents().get(0)));
			ProfileTreeSelectionDialog dialog = new ProfileTreeSelectionDialog(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell(), ((Package)modelResource.getContents().get(0)));
			int ret = dialog.open();

			if(ret == Window.OK) {
				ArrayList<?> result = dialog.getResult();
				Iterator<?> resultIter = result.iterator();
				while(resultIter.hasNext()) {
					Element element = (Element)resultIter.next();
					PackageImport ei = UMLFactory.eINSTANCE.createPackageImport();
					ei.setImportedPackage((Package)element);

					//we import only once an element :
					List<Package> importedPackages = ((Package)getSelectedElement()).getImportedPackages();
					if(!importedPackages.contains(element)) {
						((Package)getSelectedElement()).getPackageImports().add(ei);
					}
				}
			}
		}
	}

	/**
	 * Returns the list of the profiles which are already imported
	 * 
	 * @return
	 *         the list of the profiles which are already imported
	 */
	protected Collection<RegisteredProfile> getImportedProfiles() {
		List<RegisteredProfile> profiles = new ArrayList<RegisteredProfile>();
		RegisteredProfile[] allLibraries = RegisteredProfile.getRegisteredProfiles();
		for(int i = 0; i < allLibraries.length; i++) {
			RegisteredProfile registeredProfile = allLibraries[i];
			List<String> importedPackageNames = PackageUtil.getImportedPackagesNames((Package)getSelectedElement());
			// problem: name of library might be different from name of top-level package
			if(importedPackageNames.contains(registeredProfile.getName())) {
				profiles.add(registeredProfile);
			}
		}
		return profiles;
	}
}