/*******************************************************************************
 * Copyright (c) 2000, 2011 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jdt.internal.ui.wizards;

import java.lang.reflect.InvocationTargetException;

import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.OperationCanceledException;
import org.eclipse.core.runtime.jobs.ISchedulingRule;
import org.eclipse.core.runtime.jobs.Job;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IWorkspaceRunnable;
import org.eclipse.core.resources.ResourcesPlugin;

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.jface.text.templates.persistence.TemplateStore;

import org.eclipse.ui.INewWizard;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.ide.IDE;
import org.eclipse.ui.wizards.newresource.BasicNewResourceWizard;

import org.eclipse.jdt.core.IJavaElement;

import org.eclipse.jdt.internal.ui.IUIConstants;
import org.eclipse.jdt.internal.ui.JavaPlugin;
import org.eclipse.jdt.internal.ui.actions.WorkbenchRunnableAdapter;
import org.eclipse.jdt.internal.ui.dialogs.OptionalMessageDialog;
import org.eclipse.jdt.internal.ui.util.ExceptionHandler;

public abstract class NewElementWizard extends Wizard implements INewWizard {

	private IWorkbench fWorkbench;
	private IStructuredSelection fSelection;

	public NewElementWizard() {
		setNeedsProgressMonitor(true);
	}

	protected void openResource(final IFile resource) {
		final IWorkbenchPage activePage= JavaPlugin.getActivePage();
		if (activePage != null) {
			final Display display= getShell().getDisplay();
			if (display != null) {
				display.asyncExec(new Runnable() {
					@Override
					public void run() {
						try {
							IDE.openEditor(activePage, resource, true);
						} catch (PartInitException e) {
							JavaPlugin.log(e);
						}
					}
				});
			}
		}
	}

	/**
	 * Subclasses should override to perform the actions of the wizard. This method is run in the
	 * wizard container's context as a workspace runnable.
	 *
	 * @param monitor the progress monitor
	 * @throws InterruptedException when the operation is cancelled
	 * @throws CoreException if the element cannot be created
	 */
	protected abstract void finishPage(IProgressMonitor monitor) throws InterruptedException, CoreException;

	/**
	 * Returns the scheduling rule for creating the element.
	 * @return returns the scheduling rule
	 */
	protected ISchedulingRule getSchedulingRule() {
		return ResourcesPlugin.getWorkspace().getRoot(); // look all by default
	}


	protected boolean canRunForked() {
		return true;
	}

	public abstract IJavaElement getCreatedElement();

	protected void handleFinishException(Shell shell, InvocationTargetException e) {
		String title= NewWizardMessages.NewElementWizard_op_error_title;
		String message= NewWizardMessages.NewElementWizard_op_error_message;
		ExceptionHandler.handle(e, shell, title, message);
	}

	/*
	 * @see Wizard#performFinish
	 */
	@Override
	public boolean performFinish() {
		IWorkspaceRunnable op= new IWorkspaceRunnable() {
			@Override
			public void run(IProgressMonitor monitor) throws CoreException, OperationCanceledException {
				try {
					finishPage(monitor);
				} catch (InterruptedException e) {
					throw new OperationCanceledException(e.getMessage());
				}
			}
		};
		try {
			ISchedulingRule rule= null;
			Job job= Job.getJobManager().currentJob();
			if (job != null)
				rule= job.getRule();
			IRunnableWithProgress runnable= null;
			if (rule != null)
				runnable= new WorkbenchRunnableAdapter(op, rule, true);
			else
				runnable= new WorkbenchRunnableAdapter(op, getSchedulingRule());
			getContainer().run(canRunForked(), true, runnable);
		} catch (InvocationTargetException e) {
			handleFinishException(getShell(), e);
			return false;
		} catch  (InterruptedException e) {
			return false;
		}
		return true;
	}

	protected void warnAboutTypeCommentDeprecation() {
		String key= IUIConstants.DIALOGSTORE_TYPECOMMENT_DEPRECATED;
		if (OptionalMessageDialog.isDialogEnabled(key)) {
			TemplateStore templates= JavaPlugin.getDefault().getTemplateStore();
			boolean isOldWorkspace= templates.findTemplate("filecomment") != null && templates.findTemplate("typecomment") != null; //$NON-NLS-1$ //$NON-NLS-2$
			if (!isOldWorkspace) {
				OptionalMessageDialog.setDialogEnabled(key, false);
			}
			String title= NewWizardMessages.NewElementWizard_typecomment_deprecated_title;
			String message= NewWizardMessages.NewElementWizard_typecomment_deprecated_message;
			OptionalMessageDialog.open(key, getShell(), title, null, message, MessageDialog.INFORMATION, new String[] { IDialogConstants.OK_LABEL }, 0);
		}
	}

	@Override
	public void init(IWorkbench workbench, IStructuredSelection currentSelection) {
		fWorkbench= workbench;
		fSelection= currentSelection;
	}

	public IStructuredSelection getSelection() {
		return fSelection;
	}

	public IWorkbench getWorkbench() {
		return fWorkbench;
	}

	protected void selectAndReveal(IResource newResource) {
		BasicNewResourceWizard.selectAndReveal(newResource, fWorkbench.getActiveWorkbenchWindow());
	}

}
