#pragma once




#include <LtsUtilsCore/ltsutilscore_export.h>

#include <QObject>
#include <QVariant>

#include <functional>


class QTimer;


namespace LtsUtils
{
typedef std::function<void(const QVariant &value)> RawResultFunction;
typedef const RawResultFunction &ResultFunction;




class LTSUTILSCORE_EXPORT Promise : public QObject
{
  Q_OBJECT

public:
  

  Promise(const std::function<void(ResultFunction resolve, ResultFunction reject)> &function, QObject *parent = nullptr);

  

  void setFunction(const std::function<void(ResultFunction resolve, ResultFunction reject)> &function);

  

  void resolve(const QVariant &value = QVariant());

  

  void reject(const QVariant &value = QVariant());

  

  void setTimeout(int interval);

  

  Promise &resolved(ResultFunction resolveFn);

  

  Promise &rejected(ResultFunction rejectFn);


private:
  RawResultFunction m_resolveFn;
  RawResultFunction m_rejectFn;
  bool m_functionAlreadySet;
  QTimer *m_timeout;
  bool m_resultSet;
  bool m_timeoutSet;


private slots:
  void slotTimeout();
};

}