#ifndef FACT_DimWriteStatistics
#define FACT_DimWriteStatistics

#include "MessageImp.h"
#include "DimDescriptionService.h"

#include <boost/thread.hpp>

#include <string>
#include <set>

class DimWriteStatistics
{
public:
    struct Stats
    {
        uint64_t freeSpace;
        uint64_t sizeWritten;
        uint64_t rateWritten;
        uint64_t timeElapsed;

        Stats() : freeSpace(0), sizeWritten(0), rateWritten(0), timeElapsed(0) { }
    };

private:
    MessageImp &fLog;

    DimDescribedService   fDimService;

    std::string           fCurrentFolder;   /// Current folder being watched for free space
    uint16_t              fUpdateInterval;  /// Duration, in millisecond between two service updates. 0 means no more updates
    size_t                fBaseSize;        /// Total base size of all opened files
    std::set<std::string> fOpenedFiles;     /// List of all opened files. set is used to easily check for entries

    /// Bool indicating if debug information should be printed
    bool fDebug;

    /// The data structure holding the stat data
    Stats fStats;

    /// The boost thread used to update the service
    boost::thread fThread;                  

    ///Main loop
    void UpdateService();

    ///Returns the free space on the disk of the folder being watched (fCurrentFolder)
    int64_t GetFreeSpace();

    ///Returns the size on disk of a given file
    int64_t GetFileSizeOnDisk(const std::string& file);

    int Write(const Time &t, const std::string &txt, int qos);

public:
    ///Constructor
    DimWriteStatistics(const std::string& serverName, MessageImp &log);
    ///Default destructor
    ~DimWriteStatistics();

    ///Configures that current folder where files are written to
    bool SetCurrentFolder(const std::string& folder);

    bool FileOpened(const std::string& fileName);

    void SetDebugMode(bool);
    void SetUpdateInterval(const int16_t millisec);

    const Stats &GetTotalSizeWritten() const { return fStats; }
    uint16_t GetUpdateInterval() const { return fUpdateInterval; }
};

#endif
