/*
    * The MIT License (MIT)
    *
    * Copyright (c) 2013 - 2023, Tapio Rautonen
    *
    * 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.
   */
  package org.eluder.coveralls.maven.plugin.domain;
  
  import org.eclipse.jgit.lib.Config;
  import org.eclipse.jgit.lib.Constants;
  import org.eclipse.jgit.lib.ObjectId;
  import org.eclipse.jgit.lib.Repository;
  import org.eclipse.jgit.lib.RepositoryBuilder;
  import org.eclipse.jgit.revwalk.RevCommit;
  import org.eclipse.jgit.revwalk.RevWalk;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.List;
  
  public class GitRepository {
  
      private final File sourceDirectory;
  
      public GitRepository(final File sourceDirectory) {
          this.sourceDirectory = sourceDirectory;
      }
  
      public Git load() throws IOException {
          try (Repository repository = new RepositoryBuilder().findGitDir(this.sourceDirectory).build()) {
              Git.Head head = getHead(repository);
              String branch = getBranch(repository);
              List<Git.Remote> remotes = getRemotes(repository);
              return new Git(repository.getWorkTree(), head, branch, remotes);
          }
      }
  
      private Git.Head getHead(final Repository repository) throws IOException {
          ObjectId revision = repository.resolve(Constants.HEAD);
          RevCommit commit = new RevWalk(repository).parseCommit(revision);
          Git.Head head = new Git.Head(
                  revision.getName(),
                  commit.getAuthorIdent().getName(),
                  commit.getAuthorIdent().getEmailAddress(),
                  commit.getCommitterIdent().getName(),
                  commit.getCommitterIdent().getEmailAddress(),
                  commit.getFullMessage()
          );
          return head;
      }
  
      private String getBranch(final Repository repository) throws IOException {
          return repository.getBranch();
      }
  
      private List<Git.Remote> getRemotes(final Repository repository) {
          Config config = repository.getConfig();
          List<Git.Remote> remotes = new ArrayList<>();
          for (String remote : config.getSubsections("remote")) {
              String url = config.getString("remote", remote, "url");
              remotes.add(new Git.Remote(remote, url));
          }
          return remotes;
      }
  }