/*****************************************************************************
 * Copyright (c) 2019 CEA LIST.
 *
 *
 * All rights reserved. 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:
 *  Xavier Le Pallec (for CEA LIST) xlepallec@lilo.org - Bug 558456
 *
 *****************************************************************************/

package org.eclipse.papyrus.uml.diagram.clazz.lf.autosizeableclasses.preference;

import org.eclipse.core.runtime.preferences.IEclipsePreferences;
import org.eclipse.core.runtime.preferences.InstanceScope;
import org.eclipse.papyrus.uml.diagram.clazz.lf.autosizeableclasses.Activator;
import org.osgi.service.prefs.BackingStoreException;

/**
 * This class helps at accessing to eclipse configuration options related to
 * this plug-in.
 *
 */
public class Settings {

	private static final String COMPARTMENT_FIELD = "onlyConcernedCompartment"; //$NON-NLS-1$

	private static final String ACTIVATED_FIELD = "activated"; //$NON-NLS-1$

	private static final String KEEP_SIZE_FIELD = "keepsCreationSize"; //$NON-NLS-1$

	private static final Settings INSTANCE = new Settings();

	/**
	 * The instance (singleton) that allows to access to the configuration options.
	 *
	 * @return
	 */
	public static Settings getInstance() {
		return INSTANCE;
	}

	/**
	 * Option: is the plug-in is on ?
	 *
	 * @return true if it is on.
	 */
	public boolean isActivated() {
		return InstanceScope.INSTANCE.getNode(Activator.PLUGIN_ID).getBoolean(ACTIVATED_FIELD, true);
	}

	/**
	 * set the Option: is the plug-in is on ?
	 *
	 * @param activated
	 *            true to activate the plug-in.
	 */
	public void setActivated(boolean activated) {
		IEclipsePreferences preferences = InstanceScope.INSTANCE.getNode(Activator.PLUGIN_ID);
		preferences.putBoolean(ACTIVATED_FIELD, activated);
		try {
			preferences.flush();
		} catch (BackingStoreException exception) {
			Activator.getDefault().logError(exception.getMessage(), exception);
		}
	}

	/**
	 * Option: keeps the size of a class given by the user when creating it
	 *
	 * @return true if the creation size will be kept.
	 */
	public boolean keepsCreationSize() {
		return InstanceScope.INSTANCE.getNode(Activator.PLUGIN_ID).getBoolean(KEEP_SIZE_FIELD, true);
	}

	/**
	 * set the Option: keeps the size of a class given by the user when creating it
	 *
	 * @param keepsCreationSize
	 *            true to keep the creation size
	 */
	public void setKeepsCreationSize(boolean keepsCreationSize) {
		IEclipsePreferences preferences = InstanceScope.INSTANCE.getNode(Activator.PLUGIN_ID);
		preferences.putBoolean(KEEP_SIZE_FIELD, keepsCreationSize);
		try {
			preferences.flush();
		} catch (BackingStoreException exception) {
			Activator.getDefault().logError(exception.getMessage(), exception);
		}
	}

	/**
	 * Option: only collapse / expand the compartment concerned by the current
	 * request.
	 *
	 * @return true if only concerned compartment will be collapsed / expanded
	 */
	public boolean isOnlyConcernedCompartment() {
		return InstanceScope.INSTANCE.getNode(Activator.PLUGIN_ID).getBoolean(COMPARTMENT_FIELD, true);
	}

	/**
	 * Option: only collapse / expand the compartment concerned by the current
	 * request.
	 *
	 * @param onlyConcernedCompartment
	 *            true if only concerned compartment will be collapsed / expanded
	 */
	public void setOnlyConcernedCompartment(boolean onlyConcernedCompartment) {
		IEclipsePreferences preferences = InstanceScope.INSTANCE.getNode(Activator.PLUGIN_ID);
		preferences.putBoolean(COMPARTMENT_FIELD, onlyConcernedCompartment);
		try {
			preferences.flush();
		} catch (BackingStoreException exception) {
			Activator.getDefault().logError(exception.getMessage(), exception);
		}
	}
}