!7

cmodule SpeechRecognitionControl {
  S method = 'google;
  
  bool enabled = true;
  transient JPanel stack; // TODO: add elements when showing
  transient new RestartableCountdown deleteIfUnused;
  transient Set<AutoCloseable> activeRequests;
  transient ReliableSingleThread rstStartStop;
  
  start {
    rstStartStop = dm_rst(this, r startStop);
    activeRequests = setWithNotify(rstStartStop);
    startCountdown();
    if (dm_getBounds() == null) {
      int w = getWidth(dm_desktopPane()), h = getHeight(dm_desktopPane());
      dm_setBounds(this, w-300, h-200, 300, 200);
    }
  }
  
  visualize {
    ret centerAndSouth(
      withRightMargin(stack = dynamicVStack2()),
      withMargin(dm_rightAlignedFieldCheckBox('enabled)));
  }
  
  // start countdown to delete module if unused
  void startCountdown {
    if (enabled) deleteIfUnused.start(10*60.0, rEnter dm_deleteModule);
  }
  
  void startStop {
    if (enabled && nempty(activeRequests))
      dm_requireAndCallModule("#1018551/SpeechRecognizer", 'startListening);
    else
      dm_findAndCallModule("#1018551/SpeechRecognizer", 'stopListening);
   }
  
  // API
  
  // Note: cancelMe will be called in GUI thread
  AutoCloseable activateSpeechRecognition(S reason) {
    deleteIfUnused.stop();
    final JLabel lbl = jlabel(reason);
    final new Var<JComponent> c;
    final AutoCloseable release = autoCloseable {
      removeAndValidate(c!);
      activeRequests.remove(this);
      startCountdown();
    };
    c.set(centerAndEast(lbl, jbutton("Cancel", r { close(release) })));
    addAndValidate(stack, c!);
    ret addAndReturn(activeRequests, release);
  }
  
  void cancelAll {
    closeAll_cloneList(activeRequests);
  }
}