/*
    * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
    * 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.debug;
  
  import java.io.IOException;
  import java.net.URL;
  
  import org.eclipse.jgit.pgm.Command;
  import org.eclipse.jgit.pgm.CommandCatalog;
  import org.eclipse.jgit.pgm.CommandRef;
  import org.eclipse.jgit.pgm.TextBuiltin;
  import org.eclipse.jgit.pgm.internal.CLIText;
  import org.eclipse.jgit.util.io.ThrowingPrintWriter;
  import org.kohsuke.args4j.Option;
  
  @Command(usage = "usage_displayAListOfAllRegisteredJgitCommands")
  class ShowCommands extends TextBuiltin {
  	@Option(name = "--pretty", metaVar = "metaVar_commandDetail", usage = "usage_alterTheDetailShown")
  	private Format pretty = Format.USAGE;
  
  	/** {@inheritDoc} */
  	@Override
  	protected void run() throws Exception {
  		final CommandRef[] list = CommandCatalog.all();
  
  		int width = 0;
  		for (CommandRef c : list)
  			width = Math.max(width, c.getName().length());
  		width += 2;
  
  		for (CommandRef c : list) {
  			errw.print(c.isCommon() ? '*' : ' ');
  			errw.print(' ');
  
  			errw.print(c.getName());
  			for (int i = c.getName().length(); i < width; i++)
  				errw.print(' ');
  
  			pretty.print(errw, c);
  			errw.println();
  		}
  		errw.println();
  	}
  
  	static enum Format {
  		/** */
  		USAGE {
  			@Override
  			void print(ThrowingPrintWriter err, CommandRef c) throws IOException {
  				String usage = c.getUsage();
  				if (usage != null && usage.length() > 0)
  					err.print(CLIText.get().resourceBundle().getString(usage));
  			}
  		},
  
  		/** */
  		CLASSES {
  			@Override
 			void print(ThrowingPrintWriter err, CommandRef c) throws IOException {
 				err.print(c.getImplementationClassName());
 			}
 		},
 
 		/** */
 		URLS {
 			@Override
 			void print(ThrowingPrintWriter err, CommandRef c) throws IOException {
 				final ClassLoader ldr = c.getImplementationClassLoader();
 
 				String cn = c.getImplementationClassName();
 				cn = cn.replace('.', '/') + ".class"; //$NON-NLS-1$
 
 				final URL url = ldr.getResource(cn);
 				if (url == null) {
 					err.print(CLIText.get().notFound);
 					return;
 				}
 
 				String rn = url.toExternalForm();
 				if (rn.endsWith(cn))
 					rn = rn.substring(0, rn.length() - cn.length());
 
 				err.print(rn);
 			}
 		};
 
 		abstract void print(ThrowingPrintWriter err, CommandRef c) throws IOException;
 	}
 }