/*
    * #%L
    * JavaHg
    * %%
    * Copyright (C) 2011 aragost Trifork ag
    * %%
    * Permission is hereby granted, free of charge, to any person obtaining a copy
    * of this software and associated documentation files (the "Software"), to deal
    * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   * 
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   * 
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   * THE SOFTWARE.
   * #L%
   */
  package com.aragost.javahg.commands;
  
  import java.io.IOException;
  import java.util.Collections;
  import java.util.List;
  
  import com.aragost.javahg.Bookmark;
  import com.aragost.javahg.HgVersion;
  import com.aragost.javahg.Repository;
  import com.aragost.javahg.commands.flags.BookmarksCommandFlags;
  import com.aragost.javahg.internals.HgInputStream;
  import com.aragost.javahg.internals.RuntimeIOException;
  import com.aragost.javahg.log.Logger;
  import com.aragost.javahg.log.LoggerFactory;
  import com.google.common.collect.Lists;
  
  /**
   * Command class for executing <tt>hg bookmarks</tt>.
   */
  public class BookmarksCommand extends BookmarksCommandFlags {
  
      private static final Logger LOG = LoggerFactory.getLogger(BookmarksCommand.class);
  
      private static final byte[] NO_BOOKMARKS = "no bookmarks set\n".getBytes();
  
      private static final HgVersion ISSUE3263_FIXED = HgVersion.fromString("2.1.1");
  
      public BookmarksCommand(Repository repository) {
          super(repository);
          withDebugFlag();
      }
  
      /**
       * 
       * @return all bookmarks
       */
      public List<Bookmark> list() {
          Repository repo = getRepository();
          HgInputStream stream = launchStream();
          try {
              if (stream.match(NO_BOOKMARKS)) {
                  stream.consumeAll();
                  return Collections.emptyList();
              }
              List<Bookmark> result = Lists.newArrayList();
              while (stream.peek() != -1) {
                  stream.mustMatch(' ');
                  boolean active = stream.read() == '*';
                  stream.mustMatch(' ');
                  String name = stream.textUpTo(' ');
                  stream.upTo(':');
                  String node = stream.textUpTo('\n');
                  Bookmark bookmark = new Bookmark(repo.changeset(node), name, active);
                  result.add(bookmark);
              }
              return result;
          } catch (IOException e) {
              throw new RuntimeIOException(e);
          }
      }
  
      /**
       * Create a new bookmark
       * 
       * @param name
       */
      public void create(String name) {
          launchString(name);
          if (getRepository().getHgVersion().isBefore(ISSUE3263_FIXED)) {
              // It seems that performing a 'bookmarks --list' is a
              // workaround for
              // http://mercurial.selenic.com/bts/issue3263
              LOG.info("Issue3263 workaround: Executing 'bookmarks --list' as part of creating a bookmark");
              list();
         }
     }
 
     /**
      * Delete a bookmark
      * 
      * @param name
      */
     public void delete(String name) {
         launchString("--delete", name);
     }
 
     /**
      * Rename a bookmark
      * 
      * @param oldName
      * @param newName
      */
     public void rename(String oldName, String newName) {
         launchString("--rename", oldName, newName);
     }
 }