/*
 * Copyright 2000-2011 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 com.intellij.execution.configurations.GeneralCommandLine;
import jetbrains.buildServer.vcs.VcsException;
import org.jetbrains.annotations.NotNull;

import java.io.File;

/**
 * @author Pavel.Sher
 *         Date: 16.07.2008
 */
public class IdentifyCommand extends VcsRootCommand {

  private boolean myInLocalRepository = false;
  private ChangeSet myChangeSet;
  private Integer myRevisionNumber;

  public IdentifyCommand(@NotNull Settings settings, @NotNull File workingDir) {
    super(settings, workingDir);
  }

  public void setInLocalRepository(boolean inLocalRepository) {
    myInLocalRepository = inLocalRepository;
  }

  public void setChangeSet(ChangeSet changeSet) {
    myChangeSet = changeSet;
  }

  public void setRevisionNumber(int revisionNumber) {
    myRevisionNumber = revisionNumber;
  }

  public String execute() throws VcsException {
    GeneralCommandLine cli = createCL();
    cli.addParameter("identify");
    if (myInLocalRepository) {
      cli.setWorkDirectory(this.getWorkDirectory().getAbsolutePath());
    } else {
      cli.addParameter(getSettings().getRepositoryUrl());
    }
    if (myChangeSet != null) {
      cli.addParameter("--rev");
      cli.addParameter(myChangeSet.getId());
    } else if (myRevisionNumber != null) {
      cli.addParameter("--rev");
      cli.addParameter(myRevisionNumber.toString());
    }
    CommandResult res = runCommand(cli);
    failIfNotEmptyStdErr(cli, res);
    String output = res.getStdout().trim();
    return output.contains(" ") ? output.substring(0, output.indexOf(" ")) : output;
  }
}