/*******************************************************************************
 * Copyright (c) 2006, 2018 Wind River 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:
 *     Wind River Systems - initial API and implementation
 *     Alvaro Sanchez-Leon (Ericsson) - Allow user to edit the register groups (Bug 235747)
 *******************************************************************************/
package org.eclipse.cdt.dsf.internal.ui;

import org.eclipse.cdt.dsf.concurrent.IDsfStatusConstants;
import org.eclipse.cdt.dsf.debug.internal.ui.CSourceNotFoundDescriptionFactory;
import org.eclipse.cdt.dsf.debug.internal.ui.EvaluationContextManager;
import org.eclipse.cdt.dsf.debug.internal.ui.disassembly.DisassemblyBackendDsfFactory;
import org.eclipse.cdt.dsf.debug.internal.ui.disassembly.model.SourceDocumentProvider;
import org.eclipse.cdt.dsf.debug.service.IStack.IFrameDMContext;
import org.eclipse.cdt.dsf.debug.ui.DsfDebugUITools;
import org.eclipse.cdt.dsf.ui.viewmodel.datamodel.IDMVMContext;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ResourceLocator;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.BundleContext;

/**
 * The activator class controls the plug-in life cycle
 */
public class DsfUIPlugin extends AbstractUIPlugin {

	// The plug-in ID
	public static final String PLUGIN_ID = "org.eclipse.cdt.dsf.ui"; //$NON-NLS-1$

	// The shared instance
	private static DsfUIPlugin fgPlugin;

	private static BundleContext fgBundleContext;

	// The document provider for source documents in the disassembly.
	private SourceDocumentProvider fSourceDocumentProvider;

	public static boolean DEBUG = false;

	/**
	 * The constructor
	 */
	public DsfUIPlugin() {
		fgPlugin = this;
	}

	@Override
	public void start(BundleContext context) throws Exception {
		fgBundleContext = context;
		super.start(context);
		DEBUG = Boolean.parseBoolean(Platform.getDebugOption("org.eclipse.cdt.dsf.ui/debug")); //$NON-NLS-1$

		fSourceDocumentProvider = new SourceDocumentProvider();

		EvaluationContextManager.startup();

		// Register the DSF backend for our disassembly view (the CDT debug UI
		// plugin registers the CDI one)
		Platform.getAdapterManager().registerAdapters(new DisassemblyBackendDsfFactory(), IDMVMContext.class);
		// Register the factory that provides descriptions of stack frames
		// to the CSourceNotFoundEditor.
		Platform.getAdapterManager().registerAdapters(new CSourceNotFoundDescriptionFactory(), IFrameDMContext.class);

		DsfDebugUITools.enableActivity("org.eclipse.cdt.debug.ui.cdtActivity", true); //$NON-NLS-1$
	}

	@Override
	public void stop(BundleContext context) throws Exception {
		fSourceDocumentProvider.dispose();
		fSourceDocumentProvider = null;
		fgPlugin = null;
		fgBundleContext = null;
		super.stop(context);
	}

	/**
	 * Returns the shared instance
	 *
	 * @return the shared instance
	 */
	public static DsfUIPlugin getDefault() {
		return fgPlugin;
	}

	public static BundleContext getBundleContext() {
		return fgBundleContext;
	}

	/**
	 * Returns an image descriptor for the image file at the given
	 * plug-in relative path
	 *
	 * @param path the path
	 * @return the image descriptor
	 */
	public static ImageDescriptor getImageDescriptor(String path) {
		return ResourceLocator.imageDescriptorFromBundle(PLUGIN_ID, path).get();
	}

	public static SourceDocumentProvider getSourceDocumentProvider() {
		return getDefault().fSourceDocumentProvider;
	}

	/**
	 * If the debug flag is set the specified message is printed to the console
	 * @param message
	 */
	public static void debug(String message) {
		if (DEBUG) {
			System.out.println(message);
		}
	}

	/**
	 * Logs the specified status with this plug-in's log.
	 *
	 * @param status status to log
	 */
	public static void log(IStatus status) {
		getDefault().getLog().log(status);
	}

	/**
	 * Logs the specified throwable with this plug-in's log.
	 *
	 * @param t throwable to log
	 */
	public static void log(Throwable t) {
		log(newErrorStatus(IDsfStatusConstants.INTERNAL_ERROR, "Error logged from Debug UI: ", t)); //$NON-NLS-1$
	}

	/**
	 * Logs an internal error with the specified message.
	 *
	 * @param message the error message to log
	 */
	public static void logErrorMessage(String message) {
		// this message is intentionally not internationalized, as an exception may
		// be due to the resource bundle itself
		log(newErrorStatus(IDsfStatusConstants.INTERNAL_ERROR, "Internal message logged from Debug UI: " + message, //$NON-NLS-1$
				null));
	}

	/**
	 * Returns a new error status for this plug-in with the given message
	 *
	 * @param message the message to be included in the status
	 * @param error code
	 * @param exception the exception to be included in the status or <code>null</code> if none
	 * @return a new error status
	 *
	 * @since 2.0
	 */
	public static IStatus newErrorStatus(int code, String message, Throwable exception) {
		return new Status(IStatus.ERROR, DsfUIPlugin.PLUGIN_ID, code, message, exception);
	}

	/**
	 * Returns the active workbench shell or <code>null</code> if none
	 *
	 * @return the active workbench shell or <code>null</code> if none
	 */
	public static Shell getActiveWorkbenchShell() {
		IWorkbenchWindow window = getDefault().getWorkbench().getActiveWorkbenchWindow();
		if (window != null) {
			return window.getShell();
		}

		return null;
	}

}