/*
    * Copyright (C) 2011, Chris Aniszczyk <caniszczyk@gmail.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.util.ArrayList;
  import java.util.List;
  
  import org.eclipse.jgit.api.Git;
  import org.eclipse.jgit.api.ResetCommand;
  import org.eclipse.jgit.api.ResetCommand.ResetType;
  import org.kohsuke.args4j.Argument;
  import org.kohsuke.args4j.Option;
  import org.kohsuke.args4j.spi.RestOfArgumentsHandler;
  
  @Command(common = true, usage = "usage_reset")
  class Reset extends TextBuiltin {
  
  	@Option(name = "--soft", usage = "usage_resetSoft")
  	private boolean soft = false;
  
  	@Option(name = "--mixed", usage = "usage_resetMixed")
  	private boolean mixed = false;
  
  	@Option(name = "--hard", usage = "usage_resetHard")
  	private boolean hard = false;
  
  	@Argument(required = false, index = 0, metaVar = "metaVar_commitish", usage = "usage_resetReference")
  	private String commit;
  
  	@Argument(required = false, index = 1, metaVar = "metaVar_paths")
  	@Option(name = "--", metaVar = "metaVar_paths", handler = RestOfArgumentsHandler.class)
  	private List<String> paths = new ArrayList<>();
  
  	/** {@inheritDoc} */
  	@Override
  	protected void run() throws Exception {
  		try (Git git = new Git(db)) {
  			ResetCommand command = git.reset();
  			command.setRef(commit);
  			if (paths.size() > 0) {
  				for (String path : paths)
  					command.addPath(path);
  			} else {
  				ResetType mode = null;
  				if (soft)
  					mode = selectMode(mode, ResetType.SOFT);
  				if (mixed)
  					mode = selectMode(mode, ResetType.MIXED);
  				if (hard)
  					mode = selectMode(mode, ResetType.HARD);
  				if (mode == null)
  					throw die("no reset mode set"); //$NON-NLS-1$
  				command.setMode(mode);
  			}
  			command.call();
  		}
  	}
  
 	private static ResetType selectMode(ResetType mode, ResetType want) {
 		if (mode != null)
 			throw die("reset modes are mutually exclusive, select one"); //$NON-NLS-1$
 		return want;
 	}
 }