package org.eclipse.dltk.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.dltk.debug.ui.DLTKDebugUIPlugin;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.osgi.util.NLS;
import org.eclipse.swt.custom.BusyIndicator;
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;
	}

	@Override
	protected void createButtonsForButtonBar(Composite parent) {
		super.createButtonsForButtonBar(parent);
		getButton(IDialogConstants.OK_ID)
				.setText(Messages.HotCodeReplaceErrorDialog_continue);
		boolean canTerminate = target.canTerminate();
		boolean canDisconnect = target.canDisconnect();
		if (canTerminate) {
			createButton(parent, TERMINATE_ID,
					Messages.HotCodeReplaceErrorDialog_terminate, false);
		}
		if (canDisconnect) {
			createButton(parent, DISCONNECT_ID,
					Messages.HotCodeReplaceErrorDialog_disconnect, false);
		}
		if (canTerminate && !canDisconnect) {
			createButton(parent, RESTART_ID,
					Messages.HotCodeReplaceErrorDialog_restart, false);
		}
	}

	@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 = () -> {
				try {
					if (id == TERMINATE_ID) {
						operation[0] = Messages.HotCodeReplaceErrorDialog_terminate2;
						target.terminate();
					} else if (id == DISCONNECT_ID) {
						operation[0] = Messages.HotCodeReplaceErrorDialog_disconnect2;
						target.disconnect();
					} else {
						operation[0] = Messages.HotCodeReplaceErrorDialog_restart2;
						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) {
				DLTKDebugUIPlugin.errorDialog(
						NLS.bind(Messages.HotCodeReplaceErrorDialog_failed,
								operation),
						ex[0].getStatus());
			}
			okPressed();
		} else {
			super.buttonPressed(id);
		}
	}
}