/*******************************************************************************
 * Copyright (c) 2000, 2015 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 API and implementation
 *******************************************************************************/
package org.eclipse.jdt.internal.debug.ui;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.debug.core.DebugException;
import org.eclipse.debug.core.ILaunch;
import org.eclipse.debug.core.ILaunchConfiguration;
import org.eclipse.debug.core.model.IDebugTarget;
import org.eclipse.debug.ui.DebugUITools;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.osgi.util.NLS;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.BusyIndicator;
import org.eclipse.swt.events.TraverseEvent;
import org.eclipse.swt.events.TraverseListener;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Shell;

/**
 * An error dialog reporting a problem with a debug
 * target which gives the user the option to continue
 * or terminate/disconnect or restart the target.
 */
public class HotCodeReplaceErrorDialog extends ErrorDialogWithToggle {

	protected IDebugTarget target;
	// The IDs of the buttons. Set to the sum of the other possible IDs generated by
	// this dialog to ensure the IDs' uniqueness.
	protected int TERMINATE_ID= IDialogConstants.OK_ID + IDialogConstants.DETAILS_ID + IDialogConstants.CANCEL_ID;
	protected int DISCONNECT_ID= TERMINATE_ID + 1;
	protected int RESTART_ID= TERMINATE_ID + 2;

	/**
	 * Creates a new dialog which can terminate, disconnect or restart the given debug target.
	 *
	 * @param target the debug target
	 * @see ErrorDialogWithToggle#ErrorDialogWithToggle(Shell, String, String, IStatus, String, String, IPreferenceStore)
	 */
	public HotCodeReplaceErrorDialog(Shell parentShell, String dialogTitle, String message, IStatus status, String preferenceKey, String toggleMessage, IPreferenceStore store, IDebugTarget target) {
		super(parentShell, dialogTitle, message, status, preferenceKey, toggleMessage, store);
		this.target = target;
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.dialogs.Dialog#createButtonsForButtonBar(org.eclipse.swt.widgets.Composite)
	 */
	@Override
	protected void createButtonsForButtonBar(Composite parent) {
		super.createButtonsForButtonBar(parent);
		getButton(IDialogConstants.OK_ID).setText(DebugUIMessages.HotCodeReplaceErrorDialog_0);
		boolean canTerminate= target.canTerminate();
		boolean canDisconnect= target.canDisconnect();
		if (canTerminate) {
			createButton(parent, TERMINATE_ID, DebugUIMessages.HotCodeReplaceErrorDialog_1, false);
		}
		if (canDisconnect) {
			createButton(parent, DISCONNECT_ID, DebugUIMessages.HotCodeReplaceErrorDialog_3, false);
		}
		if (canTerminate && !canDisconnect) {
			createButton(parent, RESTART_ID, DebugUIMessages.HotCodeReplaceErrorDialog_7, false);
		}
		blockMnemonicWithoutModifier(getToggleButton());
	}

	/*
	 * @see org.eclipse.jface.dialogs.Dialog#createButton(org.eclipse.swt.widgets.Composite, int, java.lang.String, boolean)
	 * @since 3.6
	 */
	@Override
	protected Button createButton(Composite parent, int id, String label, boolean defaultButton) {
		Button button= super.createButton(parent, id, label, defaultButton);
		blockMnemonicWithoutModifier(button);
		return button;
	}

	/**
	 * Ensures that simple key presses don't activate the given button.
	 *
	 * @param button the button to tweak
	 * @since 3.6
	 */
	protected void blockMnemonicWithoutModifier(Button button) {
		button.addTraverseListener(new TraverseListener() {
			@Override
			public void keyTraversed(TraverseEvent e) {
				if (e.detail == SWT.TRAVERSE_MNEMONIC && e.doit == true && e.stateMask != SWT.MOD3) {
					e.doit= false;
				}
			}
		});
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.dialogs.Dialog#buttonPressed(int)
	 */
	@Override
	protected void buttonPressed(final int id) {
		if (id == TERMINATE_ID || id == DISCONNECT_ID || id == RESTART_ID) {
			final DebugException[] ex = new DebugException[1];
			final String[] operation = new String[1];
			ex[0] = null;
			Runnable r = new Runnable() {
				@Override
				public void run() {
					try {
						if (id == TERMINATE_ID) {
							operation[0]= DebugUIMessages.HotCodeReplaceErrorDialog_5;
							target.terminate();
						} else if (id == DISCONNECT_ID){
							operation[0]= DebugUIMessages.HotCodeReplaceErrorDialog_6;
							target.disconnect();
						} else {
							operation[0]= DebugUIMessages.HotCodeReplaceErrorDialog_8;
							ILaunch launch = target.getLaunch();
							launch.terminate();
							ILaunchConfiguration config = launch.getLaunchConfiguration();
							if (config != null  && config.exists()) {
								DebugUITools.launch(config, launch.getLaunchMode());
							}
						}
					} catch (DebugException e) {
						ex[0] = e;
					}
				}
			};
			BusyIndicator.showWhile(getShell().getDisplay(), r);
			if (ex[0] != null) {
				JDIDebugUIPlugin.statusDialog(NLS.bind(DebugUIMessages.HotCodeReplaceErrorDialog_2, operation), ex[0].getStatus());
			}
			okPressed();
		} else {
			super.buttonPressed(id);
		}
	}
}