/*
 * Copyright 2000-2018 JetBrains s.r.o.
 *
 * Licensed 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 jetbrains.buildServer.buildTriggers.vcs.mercurial.command;

import jetbrains.buildServer.util.StringUtil;
import jetbrains.buildServer.vcs.VcsException;
import org.jetbrains.annotations.NotNull;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

public class ParentsCommand extends BaseCommand {

  private String myRevision;

  public ParentsCommand(@NotNull CommandSettings commandSettings,
                        @NotNull String hgPath,
                        @NotNull File workingDir) {
    super(commandSettings, hgPath, workingDir);
  }

  public ParentsCommand ofRevision(@NotNull String revision) {
    myRevision = revision;
    return this;
  }

  public List<String> call() throws VcsException {
    MercurialCommandLine cli = createCommandLine();
    cli.addParameter("parents");
    cli.addParameter("-q");
    if (myRevision != null)
      cli.addParameters("-r", myRevision);
    CommandResult res = runCommand(cli);
    List<String> parentRevisions = new ArrayList<String>();
    for (String line : res.getRawStdout().split("\n")) {
      if (StringUtil.isEmpty(line))
        continue;
      parentRevisions.add(new ChangeSet(line).getId());
    }
    return parentRevisions;
  }

  @NotNull
  @Override
  protected String getDescription() {
    return "hg parents";
  }
}