/*
 * Copyright 2000-2014 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.util.FileUtil;
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.createTempFile;
import static com.intellij.openapi.util.io.FileUtil.delete;

/**
* Created 25.02.14 11:29
*
* @author Eugene Petrenko (eugene.petrenko@jetbrains.com)
*/
public class MercurialLogTemplate {
  private final String myResourcePath;
  private final String myTmpFileSuffix;
  private File myFile;

  public MercurialLogTemplate(@NotNull final String resourcePath,
                              @NotNull final String tmpFileSuffix) throws IOException {
    myResourcePath = resourcePath;
    myTmpFileSuffix = tmpFileSuffix;
    copyTemplate();
  }

  @NotNull
  public File getTemplate() throws VcsException {
    if (myFile.isFile() && myFile.exists())
      return myFile;
    try {
      copyTemplate();
      return myFile;
    } catch (IOException e) {
      throw new VcsException("Cannot create mercurial log template", e);
    }
  }

  public void dispose() {
    delete(myFile);
  }

  private void copyTemplate() throws IOException {
    File template = createTempFile("teamcity", myTmpFileSuffix);
    FileUtil.copyResource(getClass(), myResourcePath, template);
    myFile = template;
  }
}