/*
    * Copyright (C) 2012, Tomasz Zarna <Tomasz.Zarna@pl.ibm.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.File;
  import java.io.IOException;
  import java.util.Set;
  
  import org.eclipse.jgit.errors.ConfigInvalidException;
  import org.eclipse.jgit.errors.NotSupportedException;
  import org.eclipse.jgit.lib.Constants;
  import org.eclipse.jgit.lib.StoredConfig;
  import org.eclipse.jgit.storage.file.FileBasedConfig;
  import org.eclipse.jgit.util.FS;
  import org.eclipse.jgit.util.StringUtils;
  import org.eclipse.jgit.util.SystemReader;
  import org.kohsuke.args4j.Option;
  
  @Command(common = true, usage = "usage_getAndSetOptions")
  class Config extends TextBuiltin {
  	@Option(name = "--system", usage = "usage_configSystem")
  	private boolean system;
  
  	@Option(name = "--global", usage = "usage_configGlobal")
  	private boolean global;
  
  	@Option(name = "--local", usage = "usage_configLocal")
  	private boolean local;
  
  	@Option(name = "--list", aliases = { "-l" }, usage = "usage_configList")
  	private boolean list;
  
  	@Option(name = "--file", aliases = { "-f" }, metaVar = "metaVar_file", usage = "usage_configFile")
  	private File configFile;
  
  	@Override
  	protected void run() throws Exception {
  		if (list)
  			list();
  		else
  			throw new NotSupportedException(
  					"only --list option is currently supported"); //$NON-NLS-1$
  	}
  
  	private void list() throws IOException, ConfigInvalidException {
  		final FS fs = getRepository().getFS();
  		if (configFile != null) {
  			list(new FileBasedConfig(configFile, fs));
  			return;
  		}
  		if (system
  				|| (isListAll() && StringUtils.isEmptyOrNull(SystemReader
  						.getInstance()
  						.getenv(Constants.GIT_CONFIG_NOSYSTEM_KEY))))
  			list(SystemReader.getInstance().openSystemConfig(null, fs));
  		if (global || isListAll())
  			list(SystemReader.getInstance().openUserConfig(null, fs));
  		if (local || isListAll())
  			list(new FileBasedConfig(fs.resolve(getRepository().getDirectory(),
  					Constants.CONFIG), fs));
  	}
  
  	private boolean isListAll() {
  		return !system && !global && !local && configFile == null;
 	}
 
 	private void list(StoredConfig config) throws IOException,
 			ConfigInvalidException {
 		config.load();
 		Set<String> sections = config.getSections();
 		for (String section : sections) {
 			Set<String> names = config.getNames(section);
 			for (String name : names) {
 				for (String value : config.getStringList(section, null, name))
 					outw.println(section + "." + name + "=" + value); //$NON-NLS-1$ //$NON-NLS-2$
 			}
 			if (names.isEmpty()) {
 				for (String subsection : config.getSubsections(section)) {
 					names = config.getNames(section, subsection);
 					for (String name : names) {
 						for (String value : config.getStringList(section,
 								subsection, name))
 							outw.println(section + "." + subsection + "." //$NON-NLS-1$ //$NON-NLS-2$
 									+ name + "=" + value); //$NON-NLS-1$
 					}
 				}
 			}
 		}
 	}
 }