/**
  * @RDE_HEADER@
  * Frameless Dialog, modal, exists exactly once per - a global/static wait dlg which counts for all compontens that are waiting for their operation to be done but don't want to own a progress dialog !
  * $Id$
  * $HeadURL$
  * $Author$
  *
  * Created by Mike Wille, SLSE, 2017-03-17
  */

#pragma once

#include "lts_widgets_export.h"

#include <QObject>


class QTimer;
class QWidget;


namespace LtsWidgets
{
class LtsDialog;
class LtsOverlayLoading;
class LtsProgressDialogHelper;
/**
 * @brief The LtsGlobalWaitDialog class is a global/static wait dlg which counts for all compontens that are waiting for their operation to be done but don't want to own a progress dialog !
 */
class LTSWIDGETS_EXPORT LtsGlobalWaitDialog : public QObject
{
  Q_OBJECT

public:
  static LtsGlobalWaitDialog* getInstance();
  void wait(QWidget *parent, const QString &customText = QString()); // shows the Progress Dialog
  void wait(const QString &customText = QString()) { wait(nullptr, customText); }
  void done(); // hides the Progress Dialog IF all wait()s were canceled with done() !
  void setVisible(bool visible = true);
  void setCustomText(const QString &customText = QString()); // call with empty string to reset text to default text "waiting for server"
  void unarm(); // deactivate the global wait dialog from showing up (e.g. wait dialog should not be recorded while recording a script in the script editor)
  void rearm(); // undo the unarm (re-activate global wait dialog)

private:
  friend struct LtsGlobalWaitDialogHandler;

  LtsGlobalWaitDialog();
  ~LtsGlobalWaitDialog();
  static void cleanupGwdInstance();

  void showIt();
  void hideIt();

  int m_waitingCount;
  bool m_visible;
  bool m_armed { true };
  LtsProgressDialogHelper *m_progressDialog;
  QTimer *m_hideTimer;
};

} // namespace LtsWidgets



// 'hyper-global' stuff into main namespace
class LTSWIDGETS_EXPORT Waiter
{
public:
  explicit Waiter(const QString &customText = {});
  explicit Waiter(LtsWidgets::LtsDialog *parent, const QString &customText = {});
  ~Waiter();

private:
  LtsWidgets::LtsOverlayLoading *m_loadingOverlay { nullptr };
  LtsWidgets::LtsDialog *m_parent { nullptr };
  bool m_oldClosableState { false };
};