/*******************************************************************************
 * Copyright (c) 2004, 2016 QNX Software Systems 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:
 *     QNX Software Systems - initial API and implementation
 *******************************************************************************/
package org.eclipse.cdt.launch.internal.ui;

import org.eclipse.cdt.core.CCorePlugin;
import org.eclipse.cdt.core.IProcessInfo;
import org.eclipse.cdt.core.IProcessList;
import org.eclipse.cdt.debug.core.ICDTLaunchConfigurationConstants;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Status;
import org.eclipse.debug.core.IStatusHandler;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.window.Window;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.dialogs.TwoPaneElementSelector;

public class ProcessPrompter implements IStatusHandler {

	@Override
	public Object handleStatus(IStatus status, Object source) throws CoreException {
		Shell shell = LaunchUIPlugin.getShell();
		if (shell == null) {
			IStatus error = new Status(IStatus.ERROR, LaunchUIPlugin.getUniqueIdentifier(),
					ICDTLaunchConfigurationConstants.ERR_INTERNAL_ERROR,
					LaunchMessages.CoreFileLaunchDelegate_No_Shell_available_in_Launch, null);
			throw new CoreException(error);
		}

		ILabelProvider provider = new LabelProvider() {

			/*
			 * (non-Javadoc)
			 *
			 * @see org.eclipse.jface.viewers.LabelProvider#getText(java.lang.Object)
			 */
			@Override
			public String getText(Object element) {
				IProcessInfo info = (IProcessInfo) element;
				IPath path = new Path(info.getName());
				return path.lastSegment() + " - " + info.getPid(); //$NON-NLS-1$
			}

			/*
			 * (non-Javadoc)
			 *
			 * @see org.eclipse.jface.viewers.LabelProvider#getImage(java.lang.Object)
			 */
			@Override
			public Image getImage(Object element) {
				return LaunchImages.get(LaunchImages.IMG_OBJS_EXEC);
			}
		};
		ILabelProvider qprovider = new LabelProvider() {

			@Override
			public String getText(Object element) {
				IProcessInfo info = (IProcessInfo) element;
				return info.getName();
			}

			/*
			 * (non-Javadoc)
			 *
			 * @see org.eclipse.jface.viewers.LabelProvider#getImage(java.lang.Object)
			 */
			@Override
			public Image getImage(Object element) {
				return LaunchImages.get(LaunchImages.IMG_OBJS_EXEC);
			}
		};
		TwoPaneElementSelector dialog = new TwoPaneElementSelector(shell, provider, qprovider);
		dialog.setTitle(LaunchMessages.LocalAttachLaunchDelegate_Select_Process);
		dialog.setMessage(LaunchMessages.LocalAttachLaunchDelegate_Select_Process_to_attach_debugger_to);
		IProcessList plist = null;
		try {
			plist = CCorePlugin.getDefault().getProcessList();
		} catch (CoreException e) {
			LaunchUIPlugin.errorDialog(LaunchMessages.LocalAttachLaunchDelegate_CDT_Launch_Error, e.getStatus());
		}
		if (plist == null) {
			MessageDialog.openError(shell, LaunchMessages.LocalAttachLaunchDelegate_CDT_Launch_Error,
					LaunchMessages.LocalAttachLaunchDelegate_Platform_cannot_list_processes);
			return null;
		}
		dialog.setElements(plist.getProcessList());
		if (dialog.open() == Window.OK) {
			IProcessInfo info = (IProcessInfo) dialog.getFirstResult();
			if (info != null) {
				return Integer.valueOf(info.getPid());
			}
		}
		return null;
	}

}
