/*
 * Copyright (C) 2013, Matthias Sohn <matthias.sohn@sap.com>
 * and other copyright owners as documented in the project's IP log.
 *
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Distribution License v1.0 which
 * accompanies this distribution, is reproduced below, and is
 * available at http://www.eclipse.org/org/documents/edl-v10.php
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or
 * without modification, are permitted provided that the following
 * conditions are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above
 *   copyright notice, this list of conditions and the following
 *   disclaimer in the documentation and/or other materials provided
 *   with the distribution.
 *
 * - Neither the name of the Eclipse Foundation, Inc. nor the
 *   names of its contributors may be used to endorse or promote
 *   products derived from this software without specific prior
 *   written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.eclipse.jgit.pgm;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.eclipse.jgit.api.DescribeCommand;
import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.api.errors.GitAPIException;
import org.eclipse.jgit.api.errors.RefNotFoundException;
import org.eclipse.jgit.errors.InvalidPatternException;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.pgm.internal.CLIText;
import org.kohsuke.args4j.Argument;
import org.kohsuke.args4j.Option;

@Command(common = true, usage = "usage_Describe")
class Describe extends TextBuiltin {

	@Argument(index = 0, metaVar = "metaVar_treeish")
	private ObjectId tree;

	@Option(name = "--long", usage = "usage_LongFormat")
	private boolean longDesc;

	@Option(name = "--tags", usage = "usage_UseTags")
	private boolean useTags;

	@Option(name = "--always", usage = "usage_AlwaysFallback")
	private boolean always;

	@Option(name = "--match", usage = "usage_Match", metaVar = "metaVar_pattern")
	private List<String> patterns = new ArrayList<>();

	/** {@inheritDoc} */
	@Override
	protected void run() {
		try (Git git = new Git(db)) {
			DescribeCommand cmd = git.describe();
			if (tree != null) {
				cmd.setTarget(tree);
			}
			cmd.setLong(longDesc);
			cmd.setTags(useTags);
			cmd.setAlways(always);
			cmd.setMatch(patterns.toArray(new String[0]));
			String result = null;
			try {
				result = cmd.call();
			} catch (RefNotFoundException e) {
				throw die(CLIText.get().noNamesFound, e);
			}
			if (result == null) {
				throw die(CLIText.get().noNamesFound);
			}

			outw.println(result);
		} catch (IOException | InvalidPatternException | GitAPIException e) {
			throw die(e.getMessage(), e);
		}
	}
}