/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
    * with the License.  You may obtain a copy of the License at
    *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  package org.apache.maven.scm.provider.git.jgit.command.status;
  
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.List;
  
  import org.apache.maven.scm.ScmException;
  import org.apache.maven.scm.ScmFile;
  import org.apache.maven.scm.ScmFileSet;
  import org.apache.maven.scm.ScmFileStatus;
  import org.apache.maven.scm.command.status.AbstractStatusCommand;
  import org.apache.maven.scm.command.status.StatusScmResult;
  import org.apache.maven.scm.provider.ScmProviderRepository;
  import org.apache.maven.scm.provider.git.command.GitCommand;
  import org.apache.maven.scm.provider.git.jgit.command.JGitUtils;
  import org.eclipse.jgit.api.Git;
  import org.eclipse.jgit.api.Status;
  import org.eclipse.jgit.api.errors.GitAPIException;
  
  /**
   * @author <a href="mailto:struberg@yahoo.de">Mark Struberg</a>
   * @author Dominik Bartholdi (imod)
   * @since 1.9
   */
  public class JGitStatusCommand extends AbstractStatusCommand implements GitCommand {
      /**
       * {@inheritDoc}
       */
      protected StatusScmResult executeStatusCommand(ScmProviderRepository repo, ScmFileSet fileSet) throws ScmException {
          Git git = null;
          try {
              git = JGitUtils.openRepo(fileSet.getBasedir());
              Status status = git.status().call();
              List<ScmFile> changedFiles = getFileStati(status);
  
              return new StatusScmResult("JGit status", changedFiles);
          } catch (IOException | GitAPIException e) {
              throw new ScmException("JGit status failure!", e);
          } finally {
              JGitUtils.closeRepo(git);
          }
      }
  
      private List<ScmFile> getFileStati(Status status) {
          List<ScmFile> all = new ArrayList<>();
          addAsScmFiles(all, status.getAdded(), ScmFileStatus.ADDED);
          addAsScmFiles(all, status.getChanged(), ScmFileStatus.UPDATED);
          addAsScmFiles(all, status.getConflicting(), ScmFileStatus.CONFLICT);
          addAsScmFiles(all, status.getModified(), ScmFileStatus.MODIFIED);
          addAsScmFiles(all, status.getRemoved(), ScmFileStatus.DELETED);
          return all;
      }
  
      private void addAsScmFiles(Collection<ScmFile> all, Collection<String> files, ScmFileStatus status) {
          for (String f : files) {
              all.add(new ScmFile(f, status));
          }
      }
  }