/*
 * 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;

import jetbrains.buildServer.TempFiles;
import jetbrains.buildServer.util.FileUtil;
import org.jetbrains.annotations.NotNull;

import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

/**
 * @author Pavel.Sher
 *         Date: 14.07.2008
 */
public class LocalRepositoryUtil {
  private final static TempFiles myTempFiles = new TempFiles();
  private final static Map<String, File> myRepositories = new HashMap<String, File>();
  static {
    Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() {
      public void run() {
        myTempFiles.cleanup();
      }
    }));
  }

  public static File prepareRepository(@NotNull String repPath) throws IOException {
    File repository = myRepositories.get(repPath);
    if (repository != null) return repository;
    final File tempDir = myTempFiles.createTempDir();
    copyRepository(new File(repPath), tempDir);
    myRepositories.put(repPath, tempDir);
    return tempDir;
  }

  public static void forgetRepository(@NotNull String repPath) {
    myRepositories.remove(repPath);
  }


  public static void copyRepository(File src, File dst) throws IOException {
    FileUtil.copyDir(src, dst);
    if (new File(dst, "hg").isDirectory())
      FileUtil.rename(new File(dst, "hg"), new File(dst, ".hg"));
  }
}