sclass Handover {
  sclass Form_DoYouWantAHuman > FormInFlight {
    *() {
      steps.add(nu FormStep(
        key := "answer",
        displayText := "Would you like to be connected to a sales representative?",
        buttons := ll("Yes", "No")
      ));
    }
    
    S complete() {
      if (isYes(getValue("answer")))
        ret conversation.setForm(new ConnectToWorkerForm).initialMessage();
      else
        ret getCannedAnswer("#dontConnectMe", conversation);
    }
  }
  
  sS handleHashtag(Conversation conversation, S tag) null {
    if (eqic(tag, "#ConnectMeToAHuman"))
      ret tryToConnect(conversation);

    if (eqic(tag, "#DoYouWantAHuman")) {
      conversation.setForm(new Form_DoYouWantAHuman);
      ret ""; // Text comes from Q&A admin
    }
  }
  
  sS tryToConnect(Conversation conversation) {
    print("Handover tryToConnect");
    if (workerChat.anyWorkersAvailable())
      ret conversation.setForm(new ConnectToWorkerForm).initialMessage();
    else
      ret getCannedAnswer("#away", conversation);
  }
  
  sclass ConnectToWorkerForm > FormInFlight {
    runnable class TimeoutAction { onTimeout(); }
    
    void update(Runnable change) {
      super.update(change);
      if (conversation.worker != null)
        onWorkerAccepts();
    }
    
    S initialMessage() {
      addTimeout(20.0, new TimeoutAction);
      ret getCannedAnswer("#connecting", conversation);
    }
    
    void onWorkerAccepts() {
      if (conversation == null) ret; // cancelled in the meantime
      print("Handover accept");
      conversation.add(new Msg(getCannedAnswer("#connected", conversation), false));
      conversation.cancelForm();
    }
    
    void onTimeout() {
      if (conversation == null) ret; // cancelled in the meantime
      print("Handover timeout");
      conversation.add(new Msg(getCannedAnswer("#away", conversation), false));
      conversation.cancelForm();
    }
  }
}