//------------------------------------------------------------------------------
// Copyright (c) 2005, 2007 IBM Corporation 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:
// IBM Corporation - initial implementation
//------------------------------------------------------------------------------
package org.eclipse.epf.importing.wizards;

import java.lang.reflect.InvocationTargetException;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.epf.authoring.ui.wizards.SaveAllEditorsPage;
import org.eclipse.epf.common.ui.util.MsgBox;
import org.eclipse.epf.importing.ImportPlugin;
import org.eclipse.epf.importing.ImportResources;
import org.eclipse.epf.importing.services.ConfigurationImportData;
import org.eclipse.epf.importing.services.ConfigurationImportService;
import org.eclipse.epf.library.ILibraryManager;
import org.eclipse.epf.library.LibraryService;
import org.eclipse.epf.library.ui.LibraryUIImages;
import org.eclipse.epf.library.ui.wizards.LibraryBackupUtil;
import org.eclipse.epf.services.IFileManager;
import org.eclipse.epf.services.Services;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.wizard.Wizard;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.IImportWizard;
import org.eclipse.ui.IWorkbench;

/**
 * A wizard that imports exported library configurations into the current method
 * library.
 * 
 * @author Jeff Hardy
 * @author Kelvin Low
 * @since 1.0
 */
public class ImportConfigurationWizard extends Wizard implements IImportWizard {

	public boolean okToComplete = false;

	protected SelectImportConfigurationSource page1;

	protected SelectConfigsToImport configPage;

	protected SelectConfigSpecsToImportPage specsPage;

	protected ConfigurationImportData data = new ConfigurationImportData();

	protected ConfigurationImportService service = new ConfigurationImportService(
			data);

	/**
	 * Creates a new instance.
	 */
	public ImportConfigurationWizard() {
		setWindowTitle(ImportResources.importConfigWizard_title);
		setNeedsProgressMonitor(true);
	}

	/**
	 * @see org.eclipse.ui.IWorkbenchWizard#init(IWorkbench,
	 *      IStructuredSelection)
	 */
	public void init(IWorkbench workbench, IStructuredSelection selection) {
	}

	/**
	 * @see org.eclipse.jface.wizard.Wizard#addPages()
	 */
	public void addPages() {
		IFileManager fileMgr = Services.getFileManager();
		if (LibraryService.getInstance().getCurrentMethodLibrary() != null) {
			fileMgr.checkModify(LibraryService.getInstance()
					.getCurrentMethodLibrary().eResource().getURI()
					.toFileString(), MsgBox.getDefaultShell());
		}

		ILibraryManager manager = (ILibraryManager) LibraryService
				.getInstance().getCurrentLibraryManager();
		if (manager != null && manager.isMethodLibraryReadOnly()) {
			ImportPlugin.getDefault().getMsgDialog().displayError(
					ImportResources.importConfigWizard_title,
					ImportResources.ImportConfigurationWizard_readonly);
			return;
		}

		SaveAllEditorsPage.addPageIfNeeded(this, true, null, null, ImportPlugin
				.getDefault().getImageDescriptor(
						"full/wizban/ImportLibraryConfiguration.gif")); //$NON-NLS-1$

		page1 = new SelectImportConfigurationSource(data, service);
		addPage(page1);

		configPage = new SelectConfigsToImport(service);
		addPage(configPage);

		specsPage = new SelectConfigSpecsToImportPage(data);
		addPage(specsPage);
	}

	/**
	 * @see org.eclipse.jface.wizard.Wizard#createPageControls(Composite)
	 */
	public void createPageControls(Composite pageContainer) {
		super.createPageControls(pageContainer);
		pageContainer.getShell().setImage(
				LibraryUIImages.IMG_METHOD_CONFIGURATON);
	}

	/**
	 * @see org.eclipse.jface.wizard.IWizard#canFinish()
	 */
	public boolean canFinish() {
		return okToComplete;
	}

	/**
	 * @see org.eclipse.jface.wizard.IWizard#performFinish()
	 */
	public boolean performFinish() {
		// Prompt the user to back up library.
		LibraryBackupUtil.promptBackupCurrentLibrary(null, LibraryService
				.getInstance());
		IRunnableWithProgress op = new IRunnableWithProgress() {
			public void run(IProgressMonitor monitor)
					throws InvocationTargetException {
				try {
					// Start the import.
					monitor.beginTask(
							ImportResources.ImportConfigurationWizard_MSG1,
							IProgressMonitor.UNKNOWN);
					service.performImport(monitor);
				} catch (Exception e) {
					throw new InvocationTargetException(e);
				} finally {
					monitor.done();
				}
			}
		};

		try {
			getContainer().run(true, false, op);
		} catch (InterruptedException e) {
			return false;
		} catch (InvocationTargetException e) {
			Throwable realException = e.getTargetException();
			ImportPlugin.getDefault().getMsgDialog().displayError(
					ImportResources.ImportConfigurationWizard_error,
					realException.getMessage());
			return false;
		}

		// Save the import path to preference store.
		ImportUIPreferences.addImportConfigDir(data.llData.getParentFolder());

		return true;
	}

}