#pragma once

#ifdef REQUEST_HELPER_WITH_GUI
#include <LtsUtilsGuiDds/ltsutilsguidds_export.h>
#define LTSUTILSGUIDDS_INTERNAL_EXPORT LTSUTILSGUIDDS_EXPORT
#else
#include <LtsUtilsGuiDds/ltsutilsdds_export.h>
#define LTSUTILSGUIDDS_INTERNAL_EXPORT LTSUTILSDDS_EXPORT
#endif

#include <DDS/Core/function_reply_object.h>
#include <DDS/Core/core.hpp> 

#include <QObject>
#include <QVector>
#include <QPair>
#include <functional>


namespace LtsUtils
{

template<typename T>
dds::core::optional<T> toOptional(T inVal)
{
  return inVal != T() ? dds::core::optional<T>(inVal) : dds::core::optional<T>();
}

template<typename T>
dds::core::optional<T> optional()
{
  return dds::core::optional<T>();
}


class LTSUTILSGUIDDS_INTERNAL_EXPORT RequestHelper : public QObject 
{
  Q_OBJECT

public:
  static bool s_debug;

  explicit RequestHelper(QObject *parent = nullptr, bool quiet = false,
                         
                         const std::function<void (void)> &success = [](){},
                         const std::function<void (void)> &failure = [](){});
  ~RequestHelper() = default;

  bool quiet() const { return m_quiet; }
  void setQuiet(bool quiet) { m_quiet = quiet; }
  void addRequest(const std::function<int64_t()> &requestFunction,
                  const std::function<void(const Core::FunctionReply &baseReply)> &baseReplyHandler = nullptr);
  bool startRequests(); 

  
  bool startSingleRequest(const std::function<int64_t(void)> &requestFunction,
                          const std::function<void(const Core::FunctionReply &baseReply)> &baseReplyHandler = nullptr 
  );

  
  

  void startSingleBackgroundRequest(const std::function<int64_t()> &requestFunction,
                                    const std::function<void(const Core::FunctionReply &baseReply)> &baseReplyHandler = nullptr);
  

  void startBackgroundRequests(); 

  bool requestReply(const Core::FunctionReply &baseReply); 
  bool requestReply(const Core::FunctionReplyObject &replyObject);

  

  bool hasRequests() const { return !m_requestFunctions.isEmpty(); }


  

  int getRepliedId() const { return m_repliedId; }

  

  QString getErrorString() const { return m_errorString; }

  

  void setCustomWaitMessage(const QString &customWaitMessage);

  bool failed() const { return m_failed; }
  void failure();

private:
  using RequestFunctionContainer = QPair<std::function<int64_t()>, std::function<void(const Core::FunctionReply &)>>;

  QVector<RequestFunctionContainer> m_requestFunctions;
  bool m_failed;
  int m_repliedId;
  std::function<void(const Core::FunctionReply &)> m_singleRequestCustomFunctionReply;
  bool m_quiet;
  bool m_blockingCall;
  std::function<void (void)> m_successFn;
  std::function<void (void)> m_failureFn;
  QString m_errorString;
  QString m_customWaitMessage;

  void done();
  bool _requestReply(const Core::FunctionReplyObject &fro, const Core::FunctionReply *baseReply);

signals:
  void signalNextRequest();
  void signalQuitLoop();
  void signalSuccess();
  void signalFailed();

private slots:
  void slotNextRequest();

};

}