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%";
  }
}