package cz.cuni.amis.pogamut.udk.utils;
   
   import cz.cuni.amis.pogamut.base.utils.Pogamut;
   import cz.cuni.amis.pogamut.base.utils.PogamutProperty;
   import cz.cuni.amis.utils.exception.PogamutIOException;
   import java.io.File;
   import java.io.IOException;
   import java.net.InetAddress;
   import java.net.URI;
  import java.util.Arrays;
  import java.util.List;
  
  /**
   * Wrapper of the UDK instance. Can be used for launching the game in spectate mode.
   * @author ik
   */
  public class UDKWrapper {
  
      public static void launchSpectate(URI serverUri) throws IOException {
          String udkHomeProp = Pogamut.getPlatform().getProperty(PogamutUDKProperty.POGAMUT_UNREAL_HOME.getKey());
          if(udkHomeProp == null) throw new PogamutIOException(
                  "Property " + PogamutUDKProperty.POGAMUT_UNREAL_HOME.getKey() + " not set. Set it to point to the UDK home directory. You can do this in environments variables.", null);
          String path = udkHomeProp + File.separator + "System" + File.separator;
          List<String> cmds = null;
          if (!System.getProperty("os.name").contains("Windows")) {
              // TODO how to start in UNIX?
          } else {
              path += "UDK.exe";
              // TODO deal with multiple uccs on one host
              // get IP
              InetAddress adr = InetAddress.getByName(serverUri.getHost());
              cmds = Arrays.asList("cmd.exe",
                      "/c",
                      "start \"UDK Spectate\" /low \"" + path + "\" " + adr.getHostAddress());
          }
  
          ProcessBuilder builder = new ProcessBuilder(cmds);
          Process ut = builder.start();
      }
  }