/*******************************************************************************
 * Copyright (c) 2000, 2005 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 API and implementation
 *******************************************************************************/
package org.eclipse.jdt.internal.ui.exampleprojects;

import java.lang.reflect.InvocationTargetException;
import java.text.MessageFormat;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExecutableExtension;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Platform;

import org.eclipse.swt.widgets.Display;

import org.eclipse.jface.dialogs.ErrorDialog;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.wizard.Wizard;

import org.eclipse.ui.INewWizard;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.actions.WorkspaceModifyDelegatingOperation;
import org.eclipse.ui.dialogs.IOverwriteQuery;
import org.eclipse.ui.ide.IDE;
import org.eclipse.ui.wizards.newresource.BasicNewProjectResourceWizard;
import org.eclipse.ui.wizards.newresource.BasicNewResourceWizard;
import org.osgi.framework.Bundle;

public class ExampleProjectCreationWizard extends Wizard implements INewWizard, IExecutableExtension {

	private IConfigurationElement fConfigElement;
	private ExampleProjectCreationWizardPage fPage;

	public ExampleProjectCreationWizard() {
		super();
		setDialogSettings(ExampleProjectsPlugin.getDefault().getDialogSettings());
		setWindowTitle(ExampleProjectMessages.ExampleProjectCreationWizard_title);		 
		setNeedsProgressMonitor(true);
	}
	
	private void initializeDefaultPageImageDescriptor(IConfigurationElement pageConfigElement) {
		String banner= pageConfigElement.getAttribute("banner"); //$NON-NLS-1$
		if (banner != null) {
			Bundle bundle= Platform.getBundle(pageConfigElement.getNamespace());
			setDefaultPageImageDescriptor(ExampleProjectsPlugin.createImageDescriptor(bundle, new Path(banner)));
		}
	}

	/*
	 * @see Wizard#addPages
	 */	
	public void addPages() {
		super.addPages();
		if (fPage != null) {
			addPage(fPage);
		}
	}
	
	/*
	 * @see Wizard#performFinish
	 */		
	public boolean performFinish() {
		if (fPage != null) {
			ExampleProjectCreationOperation runnable= new ExampleProjectCreationOperation(fPage, new ImportOverwriteQuery());
			
			IRunnableWithProgress op= new WorkspaceModifyDelegatingOperation(runnable);
			try {
				getContainer().run(false, true, op);
			} catch (InvocationTargetException e) {
				handleException(e.getTargetException());
				return false;
			} catch  (InterruptedException e) {
				return false;
			}
			BasicNewProjectResourceWizard.updatePerspective(fConfigElement);
			IResource res= runnable.getElementToOpen();
			if (res != null) {
				openResource(res);
			}
		}
		return true;
	}
	
	private void handleException(Throwable target) {
		String title= ExampleProjectMessages.ExampleProjectCreationWizard_op_error_title; 
		String message= ExampleProjectMessages.ExampleProjectCreationWizard_op_error_message; 
		if (target instanceof CoreException) {
			IStatus status= ((CoreException)target).getStatus();
			ErrorDialog.openError(getShell(), title, message, status);
			ExampleProjectsPlugin.log(status);
		} else {
			MessageDialog.openError(getShell(), title, target.getMessage());
			ExampleProjectsPlugin.log(target);
		}
	}
	
	private void openResource(final IResource resource) {
		if (resource.getType() != IResource.FILE) {
			return;
		}
		IWorkbenchWindow window= ExampleProjectsPlugin.getDefault().getWorkbench().getActiveWorkbenchWindow();
		if (window == null) {
			return;
		}
		final IWorkbenchPage activePage= window.getActivePage();
		if (activePage != null) {
			final Display display= getShell().getDisplay();
			display.asyncExec(new Runnable() {
				public void run() {
					try {
						IDE.openEditor(activePage, (IFile)resource, true);
					} catch (PartInitException e) {
						ExampleProjectsPlugin.log(e);
					}
				}
			});
			BasicNewResourceWizard.selectAndReveal(resource, activePage.getWorkbenchWindow());
		}
	}	
		
	/*
	 * Stores the configuration element for the wizard.  The config element will be used
	 * in <code>performFinish</code> to set the result perspective.
	 */
	public void setInitializationData(IConfigurationElement cfig, String propertyName, Object data) {
		fConfigElement= cfig;
		IConfigurationElement[] children= cfig.getChildren("projectsetup"); //$NON-NLS-1$
		if (children == null || children.length != 1) {
			ExampleProjectsPlugin.log("descriptor must contain one project setup tag"); //$NON-NLS-1$
		} else {
			IConfigurationElement pageConfigElement= children[0];
			fPage= new ExampleProjectCreationWizardPage(0, pageConfigElement);
			initializeDefaultPageImageDescriptor(pageConfigElement);
		}
	}
	
	// overwrite dialog
	
	private class ImportOverwriteQuery implements IOverwriteQuery {
		public String queryOverwrite(String file) {
			String[] returnCodes= { YES, NO, ALL, CANCEL};
			int returnVal= openDialog(file);
			return returnVal < 0 ? CANCEL : returnCodes[returnVal];
		}	
		
		private int openDialog(final String file) {
			final int[] result= { IDialogConstants.CANCEL_ID };
			getShell().getDisplay().syncExec(new Runnable() {
				public void run() {
					String title= ExampleProjectMessages.ExampleProjectCreationWizard_overwritequery_title; 
					String msg= MessageFormat.format(ExampleProjectMessages.ExampleProjectCreationWizard_overwritequery_message, new Object[] {file}); 
					String[] options= {IDialogConstants.YES_LABEL, IDialogConstants.NO_LABEL, IDialogConstants.YES_TO_ALL_LABEL, IDialogConstants.CANCEL_LABEL};
					MessageDialog dialog= new MessageDialog(getShell(), title, null, msg, MessageDialog.QUESTION, options, 0);
					result[0]= dialog.open();
				}
			});
			return result[0];
		}
	}

	/* (non-Javadoc)
	 * @see org.eclipse.ui.IWorkbenchWizard#init(org.eclipse.ui.IWorkbench, org.eclipse.jface.viewers.IStructuredSelection)
	 */
	public void init(IWorkbench workbench, IStructuredSelection selection) {

	}		
}