/*****************************************************************************
 * Copyright (c) 2020 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:
 *  ansgar.radermacher@cea.fr  - Initial API and implementation
 *
 *****************************************************************************/

package org.eclipse.papyrus.robotics.core.utils;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.uml2.uml.Comment;
import org.eclipse.uml2.uml.NamedElement;

/**
 * Simple mechanism to provide a unique named (within the owning namespace) based on a prefix
 * and a 4 digit number
 */
public class NamingUtil {
	// max. number of distinguishable names
	final public static int MAX_COUNT = 1000;

	/**
	 * Return a unique name for a named element
	 * 
	 * @param ne
	 *            a named element
	 * @param prefix
	 *            the name prefix to use
	 * @param format
	 *            the number format to use, e.g. "%04d"
	 */
	public static String getName(NamedElement ne, String prefix, String format) {
		List<String> existingNames = new ArrayList<String>();
		for (NamedElement existingNE : ne.getNamespace().getMembers()) {
			existingNames.add(existingNE.getName());
		}
		for (int index = 1; index < MAX_COUNT; index++) {
			String name = calcName(prefix, format, index);
			if (!existingNames.contains(name)) {
				return name;
			}
		}
		return null;
	}

	/**
	 * Return a unique name for a comment (largely duplicated code with setName for a named element),
	 * 
	 * @param comment
	 *            a comment
	 * @param prefix
	 *            the name prefix to use
	 * @param format
	 *            the number format to use, e.g. "%04d"
	 */
	public static String getName(Comment comment, String prefix, String format) {
		List<String> existingNames = new ArrayList<String>();
		for (Comment existingComment : comment.getOwner().getOwnedComments()) {
			existingNames.add(existingComment.getBody());
		}
		for (int index = 1; index < MAX_COUNT; index++) {
			String name = calcName(prefix, format, index);
			if (!existingNames.contains(name)) {
				return name;
			}
		}
		return null;
	}

	/**
	 * Calculate the resulting name
	 * 
	 * @param prefix
	 *            the name prefix to use
	 * @param format
	 *            a number format string
	 * @param index
	 *            the index number
	 * @return
	 */
	protected static String calcName(String prefix, String format, int index) {
		return String.format("%s" + format, prefix, index); //$NON-NLS-1$
	}
}