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

import java.io.File;

import static jetbrains.buildServer.buildTriggers.vcs.mercurial.command.CommandExecutionSettingsBuilder.with;

public class ArchiveCommand extends VcsRootCommand {
  private File myDestDir;
  private String myToId;

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

  public ArchiveCommand toDir(@NotNull File destDir) {
    myDestDir = destDir;
    return this;
  }

  public ArchiveCommand revision(@NotNull ChangeSet cset) {
    myToId = cset.getId();
    return this;
  }

  public void call() throws VcsException {
    if (myDestDir == null)
      throw new IllegalStateException("Destination dir must be specified");
    GeneralCommandLine cli = createCommandLine();
    cli.addParameter("archive");
    setType(cli);
    setRevision(cli);
    setDestination(cli);

    runCommand(cli, with().failureWhenStderrNotEmpty());
    deleteHgArchival();
  }

  private void setDestination(GeneralCommandLine cli) {
    cli.addParameter(myDestDir.getAbsolutePath());
  }

  private void setRevision(GeneralCommandLine cli) {
    cli.addParameter("-r");
    if (myToId != null) {
      cli.addParameter(myToId);
    } else {
      cli.addParameter("tip");
    }
  }

  private void setType(GeneralCommandLine cli) {
    cli.addParameter("-t");
    cli.addParameter("files");
  }

  /**
   * hg archive generates .hg_archival.txt, delete it since original repository do not have such file
   */
  private void deleteHgArchival() {
    if (myDestDir == null)
      throw new IllegalStateException("Destination dir must be specified");
    File hg_arhival = new File(myDestDir, ".hg_archival.txt");
    FileUtil.delete(hg_arhival);
  }
}