/*******************************************************************************
 * Copyright (c) 2000, 2017 IBM Corporation and others.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 * 
 * SPDX-License-Identifier: EPL-2.0
 *
 *******************************************************************************/
package org.eclipse.dltk.ui.wizards;

import java.lang.reflect.InvocationTargetException;

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.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.dltk.core.DLTKCore;
import org.eclipse.dltk.core.IModelElement;
import org.eclipse.dltk.internal.ui.IUIConstants;
import org.eclipse.dltk.internal.ui.actions.WorkbenchRunnableAdapter;
import org.eclipse.dltk.internal.ui.dialogs.OptionalMessageDialog;
import org.eclipse.dltk.internal.ui.wizards.NewWizardMessages;
import org.eclipse.dltk.ui.DLTKUIPlugin;
import org.eclipse.dltk.ui.util.ExceptionHandler;
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.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
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;

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 = DLTKUIPlugin.getActivePage();
		if (activePage != null) {
			final Display display = getShell().getDisplay();
			if (display != null) {
				display.asyncExec(() -> {
					try {
						IDE.openEditor(activePage, resource, true);
					} catch (PartInitException e) {
						DLTKUIPlugin.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
	 * @throws InterruptedException
	 * @throws CoreException
	 */
	protected abstract void finishPage(IProgressMonitor monitor)
			throws InterruptedException, CoreException;

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

	protected boolean canRunForked() {
		return true;
	}

	public abstract IModelElement 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);
	}

	@Override
	public boolean performFinish() {
		IWorkspaceRunnable op = monitor -> {
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=
			// DLTKUIPlugin.getDefault().getTemplateStore();
			// boolean isOldWorkspace= templates.findTemplate("filecomment") !=
			// null && templates.findTemplate("typecomment") != null;
			// //$NON-NLS-1$ //$NON-NLS-2$
			// if (!isOldWorkspace) {
			// OptionalMessageDialog.setDialogEnabled(key, false);
			// }
			if (DLTKCore.DEBUG) {
				System.err
						.println("NewElementWizard: Add templates support here"); //$NON-NLS-1$
			}
			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());
	}

}