/*!
 * \file skywatcherAPIMount.h
 *
 * \author Roger James
 * \author Gerry Rozema
 * \author Jean-Luc Geehalel
 * \date 13th November 2013
 *
 * This file contains the definitions for a C++ implementatiom of a INDI telescope driver using the Skywatcher API.
 * It is based on work from three sources.
 * A C++ implementation of the API by Roger James.
 * The indi_eqmod driver by Jean-Luc Geehalel.
 * The synscanmount driver by Gerry Rozema.
 */

#pragma once

#include "indiguiderinterface.h"
#include "skywatcherAPI.h"
#include "indielapsedtimer.h"
#include "alignment/AlignmentSubsystemForDrivers.h"

typedef enum { PARK_COUNTERCLOCKWISE = 0, PARK_CLOCKWISE } ParkDirection_t;
typedef enum { PARK_NORTH = 0, PARK_EAST, PARK_SOUTH, PARK_WEST } ParkPosition_t;

struct GuidingPulse
{
    double DeltaAlt { 0 };
    double DeltaAz { 0 };
    int Duration { 0 };
    int OriginalDuration { 0 };
};


class SkywatcherAPIMount :
    public SkywatcherAPI,
    public INDI::Telescope,
    public INDI::GuiderInterface,
    public INDI::AlignmentSubsystem::AlignmentSubsystemForDrivers
{
    public:
        SkywatcherAPIMount();
        virtual ~SkywatcherAPIMount() = default;

        virtual bool initProperties() override;
        virtual void ISGetProperties(const char *dev) override;
        virtual bool updateProperties() override;
        virtual bool ISNewBLOB(const char *dev, const char *name, int sizes[], int blobsizes[], char *blobs[],
                               char *formats[], char *names[], int n) override;
        virtual bool ISNewNumber(const char *dev, const char *name, double values[], char *names[], int n) override;
        virtual bool ISNewSwitch(const char *dev, const char *name, ISState *states, char *names[], int n) override;
        virtual bool ISNewText(const char *dev, const char *name, char *texts[], char *names[], int n) override;

    protected:
        /////////////////////////////////////////////////////////////////////////////////////
        /// Communication
        /////////////////////////////////////////////////////////////////////////////////////
        virtual bool Handshake() override;
        virtual bool ReadScopeStatus() override;

        /////////////////////////////////////////////////////////////////////////////////////
        /// Motion
        /////////////////////////////////////////////////////////////////////////////////////
        virtual bool MoveNS(INDI_DIR_NS dir, TelescopeMotionCommand command) override;
        virtual bool MoveWE(INDI_DIR_WE dir, TelescopeMotionCommand command) override;
        virtual bool Goto(double ra, double dec) override;
        virtual bool Sync(double ra, double dec) override;
        virtual bool Abort() override;
        virtual bool SetTrackEnabled(bool enabled) override;

        /////////////////////////////////////////////////////////////////////////////////////
        /// Misc.
        /////////////////////////////////////////////////////////////////////////////////////
        virtual const char *getDefaultName() override;
        virtual void TimerHit() override;
        virtual bool updateLocation(double latitude, double longitude, double elevation) override;
        virtual bool saveConfigItems(FILE *fp) override;
        double GetSlewRate();
        double GetParkDeltaAz(ParkDirection_t target_direction, ParkPosition_t target_position);

        /////////////////////////////////////////////////////////////////////////////////////
        /// Guiding
        /////////////////////////////////////////////////////////////////////////////////////
        virtual IPState GuideNorth(uint32_t ms) override;
        virtual IPState GuideSouth(uint32_t ms) override;
        virtual IPState GuideEast(uint32_t ms) override;
        virtual IPState GuideWest(uint32_t ms) override;

        /////////////////////////////////////////////////////////////////////////////////////
        /// Parking
        /////////////////////////////////////////////////////////////////////////////////////
        virtual bool Park() override;
        virtual bool UnPark() override;
        virtual bool SetCurrentPark() override;
        virtual bool SetDefaultPark() override;

    private:

        /////////////////////////////////////////////////////////////////////////////////////
        /// Guiding
        /////////////////////////////////////////////////////////////////////////////////////
        void CalculateGuidePulses();
        void ResetGuidePulses();
        void ConvertGuideCorrection(double delta_ra, double delta_dec, double &delta_alt, double &delta_az);

        /////////////////////////////////////////////////////////////////////////////////////
        /// Telescope Vector <---> Microsteps
        /////////////////////////////////////////////////////////////////////////////////////
        void SkywatcherMicrostepsFromTelescopeDirectionVector(
            const INDI::AlignmentSubsystem::TelescopeDirectionVector TelescopeDirectionVector, long &Axis1Microsteps,
            long &Axis2Microsteps);
        const INDI::AlignmentSubsystem::TelescopeDirectionVector
        TelescopeDirectionVectorFromSkywatcherMicrosteps(long Axis1Microsteps, long Axis2Microsteps);

        /////////////////////////////////////////////////////////////////////////////////////
        /// Misc
        /////////////////////////////////////////////////////////////////////////////////////
        void UpdateScopeConfigSwitch();
        void UpdateDetailedMountInformation(bool InformClient);
        bool getCurrentAltAz(INDI::IHorizontalCoordinates &altaz);
        bool getCurrentRADE(INDI::IHorizontalCoordinates altaz, INDI::IEquatorialCoordinates &rade);

        /////////////////////////////////////////////////////////////////////////////////////
        /// Properties
        /////////////////////////////////////////////////////////////////////////////////////
        static constexpr const char *DetailedMountInfoPage { "Detailed Mount Information" };
        IText BasicMountInfoT[4] {};
        ITextVectorProperty BasicMountInfoTP;
        enum
        {
            MOTOR_CONTROL_FIRMWARE_VERSION,
            MOUNT_CODE,
            MOUNT_NAME,
            IS_DC_MOTOR
        };

        INumber AxisOneInfoN[4];
        INumberVectorProperty AxisOneInfoNP;
        INumber AxisTwoInfoN[4];
        INumberVectorProperty AxisTwoInfoNP;
        enum
        {
            MICROSTEPS_PER_REVOLUTION,
            STEPPER_CLOCK_FREQUENCY,
            HIGH_SPEED_RATIO,
            MICROSTEPS_PER_WORM_REVOLUTION
        };


        ISwitch AxisOneStateS[6];
        ISwitchVectorProperty AxisOneStateSP;
        ISwitch AxisTwoStateS[6];
        ISwitchVectorProperty AxisTwoStateSP;
        enum
        {
            FULL_STOP,
            SLEWING,
            SLEWING_TO,
            SLEWING_FORWARD,
            HIGH_SPEED,
            NOT_INITIALISED
        };

        enum
        {
            RAW_MICROSTEPS,
            MICROSTEPS_PER_ARCSEC,
            OFFSET_FROM_INITIAL,
            DEGREES_FROM_INITIAL
        };
        INumber AxisOneEncoderValuesN[4];
        INumberVectorProperty AxisOneEncoderValuesNP;
        INumber AxisTwoEncoderValuesN[4];
        INumberVectorProperty AxisTwoEncoderValuesNP;

        ISwitch SlewModesS[2];
        ISwitchVectorProperty SlewModesSP;
        // A switch for silent/highspeed slewing modes
        enum
        {
            SLEW_SILENT,
            SLEW_NORMAL
        };

        ISwitch SoftPECModesS[2];
        ISwitchVectorProperty SoftPECModesSP;
        // A switch for SoftPEC modes
        enum
        {
            SOFTPEC_ENABLED,
            SOFTPEC_DISABLED
        };

        // SoftPEC value for tracking mode
        INumber SoftPecN;
        INumberVectorProperty SoftPecNP;

        // Guiding rates (RA/Dec)
        INumber GuidingRatesN[2];
        INumberVectorProperty GuidingRatesNP;


        /////////////////////////////////////////////////////////////////////////////////////
        /// Private Variables
        /////////////////////////////////////////////////////////////////////////////////////
        // Tracking
        INDI::IEquatorialCoordinates CurrentTrackingTarget { 0, 0 };
        INDI::IHorizontalCoordinates CurrentAltAz {0, 0};
        INDI::IHorizontalCoordinates TrackedAltAz {0, 0};

        long OldTrackingTarget[2] { 0, 0 };
        bool ResetTrackingSeconds { false };
        INDI::ElapsedTimer m_TrackingElapsedTimer;
        double GuideDeltaAlt { 0 };
        double GuideDeltaAz { 0 };
        double m_AzimuthRateScale {1.0};
        double m_AltitudeRateScale {2.0};

        GuidingPulse NorthPulse;
        GuidingPulse WestPulse;
        std::vector<GuidingPulse> GuidingPulses;

        bool m_ManualMotionActive { false };
};
