/*
 * 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 jetbrains.buildServer.vcs.VcsException;
import org.jetbrains.annotations.NotNull;

import java.io.File;
import java.io.IOException;

import static com.intellij.openapi.util.io.FileUtil.delete;

/**
 * @author Pavel.Sher
 *         Date: 14.07.2008
 */
public class PullCommand extends AuthCommand {

  private String myPullUrl;
  private int myTimeout;
  private boolean myTraceback;

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

  public PullCommand fromRepository(@NotNull String pullUrl) {
    myPullUrl = pullUrl;
    return this;
  }

  public PullCommand fromRepository(@NotNull File localRepository) throws IOException {
    myPullUrl = localRepository.getCanonicalPath();
    return this;
  }

  public PullCommand withTimeout(int timeout) {
    myTimeout = timeout;
    return this;
  }

  public PullCommand withTraceback(boolean runWithTraceback) {
    myTraceback = runWithTraceback;
    return this;
  }

  public void call() throws VcsException {
    ensureRepositoryIsNotLocked();
    MercurialCommandLine cli = createCommandLine();
    cli.addParameter("pull");
    if (myTraceback)
      cli.addParameter("--traceback");
    String pullUrl = myAuthSettings != null ? myAuthSettings.getRepositoryUrlWithCredentials(myPullUrl) : myPullUrl;
    cli.addParameter(pullUrl);
    runCommand(cli, myCommandSettings.setTimeout(myTimeout));
  }

  private void ensureRepositoryIsNotLocked() {
    File lock = getRepositoryLock();
    if (lock.exists())
      delete(lock);
  }

  @NotNull
  private File getRepositoryLock() {
    return new File(getWorkDirectory(), ".hg" + File.separator + "store" + File.separator + "lock");
  }
}