#pragma once



#include <QObject>
#include <QAtomicInt>
#include <QTimer>

#include <thread>
#include <exception>
#include <condition_variable>


class CancelationPointReached : public std::runtime_error
{
public:
  
  explicit CancelationPointReached()
    : std::runtime_error("CancelationPointReached")
  {}
};


class Threading 
{
  
public:
  Threading() = default;
  ~Threading();

protected:
  void preInit() const;

  
  void createThread(); 
  void runThread(); 

  
  inline bool isRun() const { return (m_run != 0); }
  inline void setRun(bool run) { m_run = (run ? 1 : 0); }

  
  inline void setWorkAvailable(bool workAvailable) { m_workAvailable = (workAvailable ? 1 : 0); }
  inline bool isWorkAvailable() const { return (m_workAvailable != 0); }

  
  inline void setWorking(bool working) { m_isWorking = (working ? 1 : 0); }  
  inline bool isWorking() const { return (m_isWorking != 0); }

  const QString &threadName() const;
  inline const char *posixThreadName() const;

  virtual void work() = 0;
  virtual QString functionTopicName() const = 0;
  virtual int partitionId() const = 0;
  virtual QString partitionType() const = 0;
  virtual void cleanupThread() = 0; 
  virtual void threadDone() = 0;

  inline void cancellationPoint() const noexcept(false) 
  {
    if (!isRun())
    {
     
      throw CancelationPointReached();
    }
  }

  std::mutex m_conditionMutex;

private:
  inline bool isCleanupNeeded() const { return (m_cleanupNeeded != 0); }
  inline void setCleanupNeeded(bool cleanupNeeded) { m_cleanupNeeded = (cleanupNeeded ? 1 : 0); }
  void run(const QString &threadName); 

  
  std::unique_ptr<QTimer> m_threadLifetime;
  QAtomicInt m_run { 0 };
  QAtomicInt m_cleanupNeeded { 1 };
  std::thread m_thread; 
  std::condition_variable m_condition;
  QAtomicInt m_workAvailable { 0 };
  QAtomicInt m_isWorking { 0 };
  mutable QString m_threadName;
  mutable std::string m_posixThreadName;
  QAtomicInt m_alreadyThreaded;
  mutable int m_partitionId { -1 };
  mutable QString m_partitionType;
  bool m_used { false };
  bool m_createThreadCalledBefore { false };
};