/*

SleepLib RESMED Loader Header

Author: Mark Watkins <jedimark64@users.sourceforge.net>
License: GPL
*/

#ifndef RESMED_LOADER_H
#define RESMED_LOADER_H
//#include <map>
//using namespace std;
#include <QVector>
#include "SleepLib/machine.h" // Base class: MachineLoader
#include "SleepLib/machine_loader.h"
#include "SleepLib/profiles.h"

//********************************************************************************************
/// IMPORTANT!!!
//********************************************************************************************
// Please INCREMENT the following value when making changes to this loaders implementation.
//
const int resmed_data_version=5;
//
//********************************************************************************************

const QString resmed_class_name=STR_MACH_ResMed;

/*! \struct EDFHeader
    \brief  Represents the EDF+ header structure, used as a place holder while processing the text data.
    \note More information on the EDF+ file format can be obtained from http://edfplus.info
*/
struct EDFHeader {
    char version[8];
    char patientident[80];
    char recordingident[80];
    char datetime[16];
    char num_header_bytes[8];
    char reserved[44];
    char num_data_records[8];
    char dur_data_records[8];
    char num_signals[4];
}
#ifndef BUILD_WITH_MSVC
__attribute__ ((packed))
#endif
;

const int EDFHeaderSize=sizeof(EDFHeader);

/*! \struct EDFSignal
    \brief Contains information about a single EDF+ Signal
    \note More information on the EDF+ file format can be obtained from http://edfplus.info
    */
struct EDFSignal {
public:
    //! \brief Name of this Signal
    QString label;

    //! \brief Tranducer Type (source of the data, usually blank)
    QString transducer_type;

    //! \brief The units of measurements represented by this signal
    QString physical_dimension;

    //! \brief The minimum limits of the ungained data
    double  physical_minimum;

    //! \brief The maximum limits of the ungained data
    double physical_maximum;

    //! \brief The minimum limits of the data with gain and offset applied
    double digital_minimum;

    //! \brief The maximum limits of the data with gain and offset applied
    double digital_maximum;

    //! \brief Raw integer data is multiplied by this value
    double gain;

    //! \brief This value is added to the raw data
    double offset;

    //! \brief Any prefiltering methods used (usually blank)
    QString prefiltering;

    //! \brief Number of records
    long nr;

    //! \brief Reserved (usually blank)
    QString reserved;

    //! \brief Pointer to the signals sample data
    qint16 * data;

    //! \brief a non-EDF extra used internally to count the signal data
    int pos;
};

/*! \class EDFParser
    \author Mark Watkins <jedimark64_at_users.sourceforge.net>
    \brief Parse an EDF+ data file into a list of EDFSignal's
    \note More information on the EDF+ file format can be obtained from http://edfplus.info
    */
class EDFParser
{
public:
    //! \brief Constructs an EDFParser object, opening the filename if one supplied
    EDFParser(QString filename="");

    ~EDFParser();

    //! \brief Open the EDF+ file, and read it's header
    bool Open(QString name);

    //! \brief Read si bytes of 8 bit data from the EDF+ data stream
    QString Read(int si);

    //! \brief Read 16 bit word of data from the EDF+ data stream
    qint16 Read16();

    //! \brief Vector containing the list of EDFSignals contained in this edf file
    QVector<EDFSignal *> edfsignals;

    //! \brief An by-name indexed into the EDFSignal data
    QHash<QString,EDFSignal *> lookup;

    //! \brief Look up signal names by SleepLib ChannelID.. A little "ResMed"ified.. :/
    EDFSignal * lookupSignal(ChannelID);

    //! \brief Returns the number of signals contained in this EDF file
    long GetNumSignals() { return num_signals; }

    //! \brief Returns the number of data records contained per signal.
    long GetNumDataRecords() { return num_data_records; }

    //! \brief Returns the duration represented by this EDF file (in milliseconds)
    qint64 GetDuration() { return dur_data_record; }

    //! \brief Returns the patientid field from the EDF header
    QString GetPatient() { return patientident; }

    //! \brief Parse the EDF+ file into the list of EDFSignals.. Must be call Open(..) first.
    bool Parse();
    char *buffer;

    //! \brief  The EDF+ files header structure, used as a place holder while processing the text data.
    EDFHeader header;

    QString filename;
    long filesize;
    long datasize;
    long pos;

    long version;
    long num_header_bytes;
    long num_data_records;
    qint64 dur_data_record;
    long num_signals;

    QString patientident;
    QString recordingident;
    QString serialnumber;
    qint64 startdate;
    qint64 enddate;
    QString reserved44;
};

/*! \class ResmedLoader
    \brief Importer for ResMed S9 Data
    */
class ResmedLoader : public MachineLoader
{
public:
    ResmedLoader();
    virtual ~ResmedLoader();

    //! \brief Scans for S9 SD folder structure signature, and loads any new data if found
    virtual int Open(QString & path,Profile *profile);

    //! \brief Returns the version number of this ResMed loader
    virtual int Version() { return resmed_data_version; }

    //! \brief Returns the Machine class name of this loader. ("ResMed")
    virtual const QString & ClassName() { return resmed_class_name; }

    //! \brief Converts EDFSignal data to time delta packed EventList, and adds to Session
    EventList * ToTimeDelta(Session *sess,EDFParser &edf, EDFSignal & es, ChannelID code, long recs,qint64 duration,EventDataType min=0,EventDataType max=0,bool square=false);

    //! \brief Create Machine record, and index it by serial number
    Machine *CreateMachine(QString serial,Profile *profile);

    //! \brief Register the ResmedLoader with the list of other machine loaders
    static void Register();
protected:
    QHash<QString,Machine *> ResmedList;

    //! \brief Parse the EVE Event annotation data, and save to Session * sess
    //! This contains all Hypopnea, Obstructive Apnea, Central and Apnea codes
    bool LoadEVE(Session *sess,EDFParser &edf);

    //! \brief Parse the BRP High Resolution data, and save to Session * sess
    //! This contains Flow Rate, Mask Pressure, and Resp. Event  data
    bool LoadBRP(Session *sess,EDFParser &edf);

    //! \brief Parse the SAD Pulse oximetry attachment data, and save to Session * sess
    //! This contains Pulse Rate and SpO2 Oxygen saturation data
    bool LoadSAD(Session *sess,EDFParser &edf);

    //! \brief Parse the PRD low resolution data, and save to Session * sess
    //! This contains the Pressure, Leak, Respiratory Rate, Minute Ventilation, Tidal Volume, etc..
    bool LoadPLD(Session *sess,EDFParser &edf);
};

#endif // RESMED_LOADER_H
