/*******************************************************************************
 *  Copyright (c) 2004, 2013 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.debug.internal.ui.commands.actions;

import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

import org.eclipse.debug.core.ILaunch;
import org.eclipse.debug.core.ILaunchConfiguration;
import org.eclipse.debug.core.IRequest;
import org.eclipse.debug.core.commands.ITerminateHandler;
import org.eclipse.debug.internal.ui.DebugPluginImages;
import org.eclipse.debug.internal.ui.DebugUIPlugin;
import org.eclipse.debug.internal.ui.IInternalDebugUIConstants;
import org.eclipse.debug.internal.ui.actions.ActionMessages;
import org.eclipse.debug.internal.ui.actions.RelaunchActionDelegate;
import org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationManager;
import org.eclipse.debug.ui.actions.DebugCommandAction;
import org.eclipse.debug.ui.contexts.DebugContextEvent;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;

/**
 * Action which terminates a launch and then re-launches it.
 */
public class TerminateAndRelaunchAction extends DebugCommandAction {

    @Override
	public void postExecute(IRequest request, final Object[] targets) {
        if (request.getStatus() == null || request.getStatus().isOK()) {
            DebugUIPlugin.getStandardDisplay().asyncExec(new Runnable() {
                @Override
				public void run() {
                    // Must be run in the UI thread since the launch can require
                    // prompting to proceed
                    for (int i = 0; i < targets.length; i++) {
                        ILaunch launch = DebugUIPlugin.getLaunch(targets[i]);
                        if (launch != null) {
                            RelaunchActionDelegate.relaunch(launch.getLaunchConfiguration(), launch.getLaunchMode());
                        }
                    }
                }
            });
        }
    }

    @Override
	protected ISelection getContext() {
        // Convert action context to contain only launch objects (bug 356651).
        ISelection context = super.getContext();
        if (context instanceof IStructuredSelection && !context.isEmpty()) {
            IStructuredSelection ss = (IStructuredSelection)context;
			Set<ILaunch> launches = new HashSet<ILaunch>(ss.size());
			for (Iterator<Object> itr = ss.iterator(); itr.hasNext();) {
                ILaunch launch = DebugUIPlugin.getLaunch(itr.next());
                if (launch != null) {
                    launches.add(launch);
                }
            }
            return new StructuredSelection(launches.toArray());
        }
        return super.getContext();
    }


	@Override
	protected Class<ITerminateHandler> getCommandType() {
		return ITerminateHandler.class;
	}

	@Override
	public void debugContextChanged(DebugContextEvent event) {
		ISelection context = event.getContext();
		if (context instanceof IStructuredSelection) {
			Object[] elements = ((IStructuredSelection)context).toArray();
			for (int i = 0; i < elements.length; i++) {
				if (!canRelaunch(elements[i])) {
					setEnabled(false);
					return;
				}
			}
		}
		super.debugContextChanged(event);
	}

    protected boolean canRelaunch(Object element) {
    	ILaunch launch = DebugUIPlugin.getLaunch(element);
    	if (launch != null) {
    		ILaunchConfiguration configuration = launch.getLaunchConfiguration();
    		if (configuration != null) {
    			return LaunchConfigurationManager.isVisible(configuration);
    		}
    	}
		return false;
    }

    @Override
	public String getActionDefinitionId() {
        return ActionMessages.TerminateAndRelaunchAction_0;
    }

    @Override
	public String getHelpContextId() {
        return "org.eclipse.debug.ui.terminate_and_relaunch_action_context"; //$NON-NLS-1$
    }

    @Override
	public String getId() {
        return "org.eclipse.debug.ui.debugview.popupMenu.TerminateAndRelaunch"; //$NON-NLS-1$
    }

    @Override
	public String getText() {
        return ActionMessages.TerminateAndRelaunchAction_3;
    }

    @Override
	public String getToolTipText() {
        return ActionMessages.TerminateAndRelaunchAction_4;
    }

    @Override
	public ImageDescriptor getDisabledImageDescriptor() {
        return DebugPluginImages.getImageDescriptor(IInternalDebugUIConstants.IMG_DLCL_TERMINATE_AND_RELAUNCH);
    }

    @Override
	public ImageDescriptor getHoverImageDescriptor() {
        return DebugPluginImages.getImageDescriptor(IInternalDebugUIConstants.IMG_ELCL_TERMINATE_AND_RELAUNCH);
    }

    @Override
	public ImageDescriptor getImageDescriptor() {
        return DebugPluginImages.getImageDescriptor(IInternalDebugUIConstants.IMG_ELCL_TERMINATE_AND_RELAUNCH);
    }
}