/*
 * 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.command;

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

import java.io.File;
import java.util.Set;

import static java.util.Collections.emptySet;

/**
 * @author pavel
 */
public class BaseCommand {

  protected final CommandSettings myCommandSettings;
  private final String myHgPath;
  private final File myWorkDirectory;

  public BaseCommand(@NotNull final CommandSettings commandSettings,
                     @NotNull final String hgPath,
                     @NotNull final File workingDir) {
    myCommandSettings = commandSettings;
    myHgPath = hgPath;
    myWorkDirectory = workingDir;
  }

  protected final int getMaxCommandLineSize() {
    return allowCommandlineViaFileWrapper()
            ? Integer.MAX_VALUE
            : myCommandSettings.getMaxCommandLineSize();
  }

  protected boolean allowCommandlineViaFileWrapper() {
    return true;
  }

  public File getWorkDirectory() {
    return myWorkDirectory;
  }

  @NotNull
  protected MercurialCommandLine createCommandLine() {
    MercurialCommandLine cli = createCL();
    cli.setWorkDirectory(myWorkDirectory.getAbsolutePath());
    return cli;
  }

  @NotNull
  protected MercurialCommandLine createCL() {
    final MercurialCommandLine cl = new MercurialCommandLine(getPrivateData());
    cl.setExePath(myHgPath);
    cl.setEnvParams(myCommandSettings.getHgEnv());

    //include global arguments if any
    cl.addParameters(myCommandSettings.getGlobalArguments());

    return cl;
  }

  @NotNull
  protected final CommandResult runCommand(@NotNull MercurialCommandLine cli) throws VcsException {
    return runCommand(cli, myCommandSettings);
  }

  @NotNull
  protected final CommandResult runCommand(@NotNull final MercurialCommandLine cli,
                                           @NotNull final CommandSettings commandSettings) throws VcsException {

    if (!myCommandSettings.getUseCommandlineViaFileWrapper() || !allowCommandlineViaFileWrapper()) {
      return CommandUtil.runCommand(cli, commandSettings.setPrivateData(getPrivateData()));
    }

    return CommandUtil.runWrappedCommand(cli, commandSettings);
  }

  protected void setupExtensionsFromResource(@NotNull final MercurialCommandLine cli,
                                             @NotNull final File tempDir,
                                             @NotNull final String commandPy) throws VcsException{
    CommandUtil.setupExtensionsFromResource(cli, tempDir, commandPy);
  }

  @NotNull
  protected Set<String> getPrivateData() {
    return emptySet();
  }

  protected String getHgPath() {
    return myHgPath;
  }
}