/**
 * @file
 *
 * @author  Mamadou Babaei <mamadou@senseglove.com>
 *
 * @section LICENSE
 *
 * (The MIT License)
 *
 * Copyright (c) 2020 - 2022 SenseGlove
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * @section DESCRIPTION
 *
 *
 */


#pragma once

#include "Containers/Array.h"
#include "Math/Vector.h"
#include "Templates/UniquePtr.h"
#include "UObject/Object.h"
#include "UObject/ObjectMacros.h"

#include "SGTypes/SGCoreTypes.h"

#include "SGHapticGloveCalibrationCheck.generated.h"

class FSGHapticGloveCalibrationCheckImpl;
class USGSensorRange;

/**
 * An algorithm that checks whether or not our current user is running in the same calibration range as last time.
 */
UCLASS(BlueprintType)
class SENSEGLOVECORE_API USGHapticGloveCalibrationCheck final : public UObject
{
    GENERATED_BODY()

public:
    static USGHapticGloveCalibrationCheck* NewHapticGloveCalibrationCheck(
        UObject* Outer, const FSGHapticGloveCalibrationCheckImpl& HapticGloveCalibrationCheckImpl);

public:
    /**
     * The last calibration range can be null, at which point you definitely need calibration.
     */
    static USGHapticGloveCalibrationCheck* NewHapticGloveCalibrationCheck(UObject* Outer);

    /**
     * The last calibration range can be null, at which point you definitely need calibration.
     */
    static USGHapticGloveCalibrationCheck* NewHapticGloveCalibrationCheck(
        UObject* Outer, const USGSensorRange* LastCalibrationRange);

public:
    /**
     * SenseGlove: How far from the threshold one can be where we would still call it 'the same as before'.
     */
    static float GetSenseGloveThreshold();

    /**
     * Nova: How far from the threshold one can be where we would still call it 'the same as before'.
     */
    static float GetNovaGloveThreshold();

    /**
     * SenseGlove: The minimum amount of sensor flexion movement before we start testing for a smaller hand.
     */
    static float GetSenseGloveMinFlexion();

    /**
     * Nova: The minimum amount of sensor flexion movement before we start testing for a smaller hand.
     */
    static float GetNovaGloveMinFlexion();

    /**
     * SenseGlove: The minimum amount of sensor movement on the thumb abduction before we start testing for a smaller hand.
     */
    static float GetSenseGloveMinAbduction();

    /**
     * Nova: The minimum amount of sensor movement on the thumb abduction before we start testing for a smaller hand.
     */
    static float GetNovaGloveMinAbduction();

public:
    /**
     * Returns true if this DeviceType requires a calibration check.
     */
    static bool NeedsCheck(ESGDeviceType DeviceType);

    /**
     * Checks if current values are operating out of the previous range. Returns -1 if all is fine. 0...4 to indicate which finger is out of bounds.
     */
    static int32 OutOfBounds(const USGSensorRange* PreviousRange, const TArray<FVector>& CurrentValues,
                             ESGDeviceType DeviceType);

    /**
     * Returns true if the user has moved enough in both flexion and thumb abduction movement to be considered 'active'
     */
    static bool MovedMinimum(const TArray<FVector>& CurrentRange, ESGDeviceType DeviceType);

    /**
     * Returns true if the current sensor values have moved roughly as much as last time.
     */
    static bool MatchesLast(const TArray<FVector>& CurrentRange, const TArray<FVector>& LastRange,
                            ESGDeviceType DeviceType);

private:
    struct FImpl;

    struct FImplDeleter
    {
        void operator()(const FImpl* P) const;
    };

    TUniquePtr<FImpl, FImplDeleter> Pimpl;
    FImplDeleter PimplDeleter;

public:
    /**
     * The last calibration range can be null, at which point you definitely need calibration.
     */
    USGHapticGloveCalibrationCheck();

    /**
     * The last calibration range can be null, at which point you definitely need calibration.
     */
    explicit USGHapticGloveCalibrationCheck(const USGSensorRange* LastCalibrationRange);

public:
    /**
     * The cast from underlying type constructor.
     */
    explicit USGHapticGloveCalibrationCheck(const FSGHapticGloveCalibrationCheckImpl& HapticGloveCalibrationCheckImpl);

public:
    /**
     * The destructor.
     */
    virtual ~USGHapticGloveCalibrationCheck() override;

protected:
    /**
     * Allows to set the underlying object after construction.
     */
    void SetHapticGloveCalibrationCheckImpl(const FSGHapticGloveCalibrationCheckImpl& HapticGloveCalibrationCheckImpl);

public:
    /**
     * The cast to underlying type method.
     */
    const FSGHapticGloveCalibrationCheckImpl& ToHapticGloveCalibrationCheckImpl() const;

public:
    /**
     *
     */
    USGSensorRange* GetLastSensorRange(UObject* Outer) const;

public:
    /**
     *
     */
    ESGCalibrationStage GetCalibrationStage() const;

    /**
     * Whether this algorithm has determined if calibration is required, or not.
     */
    bool ReachedConclusion() const;

public:
    /**
     * Reset the calibration check. so it may be used again. This does not reset the last range.
     */
    void Reset();

    /**
     * Using the currently received Sensor Values, check if calibration is required. This function will have to be called until a conclusion can be reached.
     */
    void CheckRange(const TArray<FVector>& CurrentValues, float DeltaSeconds, ESGDeviceType DeviceType);
};