/*
 * 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.buildTriggers.vcs.mercurial.command.HgVcsRoot;
import org.jetbrains.annotations.NotNull;

/**
 * @author dmitry.neverov
 */
public class ServerHgPathProvider implements HgPathProvider {

  private final ServerPluginConfig myConfig;


  public ServerHgPathProvider(@NotNull final ServerPluginConfig config) {
    myConfig = config;
  }


  public String getHgPath(@NotNull final HgVcsRoot root) {
    String serverWideHgPath = myConfig.getHgPath();
    if (serverWideHgPath != null) {
      return serverWideHgPath;
    } else {
      String pathFromRoot = root.getHgPath();
      if (pathFromRoot.equals(unresolvedAgentHgPath())) {
        //try to use hg from the PATH:
        return "hg";
      } else {
        return pathFromRoot;
      }
    }
  }


  private String unresolvedAgentHgPath() {
    //Use hard-coded value here in order to not add dependency on agent part of plugin:
    return "%teamcity.hg.agent.path%";
  }
}