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#ifndef QT3DSDM_ANIMATION_H
#define QT3DSDM_ANIMATION_H

#include "Qt3DSDMHandles.h"
#include "Qt3DSDMDataTypes.h"
#include "Qt3DSDMValue.h"

namespace qt3dsdm {

struct SLinearKeyframe
{
    float m_KeyframeSeconds;
    float m_KeyframeValue;
};

struct SBezierKeyframe : public SLinearKeyframe
{
    float m_InTangentTime; // time
    float m_InTangentValue; // value offset
    float m_OutTangentTime; // time offset in seconds
    float m_OutTangentValue; // value offset
};

typedef std::vector<SBezierKeyframe> TBezierKeyframeList;

/**
 *	Ease in/out are parameters that affect the bezier evaluation.
 *	Ease in/out at 100 means that the control values are at the end points thus creating
 *	a gradual deceleration.  Ease in/out at 0 means that interpolation is linear, the
 *	control points are at 1/3 and 2/3's the distance to the next value.
 *	Ease in/out go from 0.f to 100.0f
 */
struct SEaseInEaseOutKeyframe : public SLinearKeyframe
{
    float m_EaseIn;
    float m_EaseOut;
};

} // namespace qt3dsdm

namespace qt3ds {
namespace foundation {
    // Disable calling destructor of these pod types
    template <>
    struct DestructTraits<qt3dsdm::SEaseInEaseOutKeyframe>
    {
        void destruct(qt3dsdm::SEaseInEaseOutKeyframe &) {}
    };
    template <>
    struct DestructTraits<qt3dsdm::SBezierKeyframe>
    {
        void destruct(qt3dsdm::SBezierKeyframe &) {}
    };
    template <>
    struct DestructTraits<qt3dsdm::SLinearKeyframe>
    {
        void destruct(qt3dsdm::SLinearKeyframe &) {}
    };
}
}

namespace qt3dsdm {

enum EAnimationType {
    EAnimationTypeNone = 0,
    EAnimationTypeLinear,
    EAnimationTypeBezier,
    EAnimationTypeEaseInOut,
};

template <typename TDataType>
struct SAnimationTypeTraits
{
};

template <>
struct SAnimationTypeTraits<SBezierKeyframe>
{
    EAnimationType getType() { return EAnimationTypeBezier; }
};
template <>
struct SAnimationTypeTraits<SLinearKeyframe>
{
    EAnimationType getType() { return EAnimationTypeLinear; }
};
template <>
struct SAnimationTypeTraits<SEaseInEaseOutKeyframe>
{
    EAnimationType getType() { return EAnimationTypeEaseInOut; }
};

struct SKeyframeUnionTraits
{
    typedef EAnimationType TIdType;
    enum {
        TBufferSize = sizeof(SBezierKeyframe),
    };
    static TIdType getNoDataId() { return EAnimationTypeNone; }
    template <typename TDataType>
    static TIdType getType()
    {
        return SAnimationTypeTraits<TDataType>().getType();
    }

    template <typename TRetType, typename TVisitorType>
    static TRetType visit(char *inData, TIdType inType, TVisitorType inVisitor)
    {
        switch (inType) {
        case EAnimationTypeBezier:
            return inVisitor(*reinterpret_cast<SBezierKeyframe *>(inData));
        case EAnimationTypeLinear:
            return inVisitor(*reinterpret_cast<SLinearKeyframe *>(inData));
        case EAnimationTypeEaseInOut:
            return inVisitor(*reinterpret_cast<SEaseInEaseOutKeyframe *>(inData));
        default:
            QT3DS_ASSERT(false);
        case EAnimationTypeNone:
            return inVisitor();
        }
    }

    template <typename TRetType, typename TVisitorType>
    static TRetType visit(const char *inData, TIdType inType, TVisitorType inVisitor)
    {
        switch (inType) {
        case EAnimationTypeBezier:
            return inVisitor(*reinterpret_cast<const SBezierKeyframe *>(inData));
        case EAnimationTypeLinear:
            return inVisitor(*reinterpret_cast<const SLinearKeyframe *>(inData));
        case EAnimationTypeEaseInOut:
            return inVisitor(*reinterpret_cast<const SEaseInEaseOutKeyframe *>(inData));
        default:
            QT3DS_ASSERT(false);
        case EAnimationTypeNone:
            return inVisitor();
        }
    }
};

typedef qt3ds::foundation::
    DiscriminatedUnion<qt3ds::foundation::
                           DiscriminatedUnionGenericBase<SKeyframeUnionTraits,
                                                         SKeyframeUnionTraits::TBufferSize>,
                       SKeyframeUnionTraits::TBufferSize>
        TKeyframe;

template <>
struct Qt3DSDMGetter<TKeyframe>
{
    template <typename TRetType>
    TRetType doGet(const TKeyframe &inValue)
    {
        return inValue.getData<TRetType>();
    }
};

typedef std::vector<TKeyframe> TKeyframeList;

struct SAnimationInfo
{
    Qt3DSDMSlideHandle m_Slide;
    Qt3DSDMInstanceHandle m_Instance;
    Qt3DSDMPropertyHandle m_Property;
    size_t m_Index;
    EAnimationType m_AnimationType;
    // Use the existing value for the value of the first keyframe.
    // Not reflected in studio at this time, purely a runtime problem.
    // Defaults to false
    bool m_DynamicFirstKeyframe;
    bool m_ArtistEdited;
    SAnimationInfo()
        : m_Index(0)
        , m_AnimationType(EAnimationTypeLinear)
        , m_DynamicFirstKeyframe(false)
        // Animations are assumed to be artist edited.
        // And any change will force this flag to true.
        , m_ArtistEdited(true)

    {
    }
    SAnimationInfo(Qt3DSDMSlideHandle inSlide, Qt3DSDMInstanceHandle inInstance,
                   Qt3DSDMPropertyHandle inProperty, size_t inIndex, EAnimationType inAnimationType,
                   bool inDynamicFirstKeyframe, bool inArtistEdited)
        : m_Slide(inSlide)
        , m_Instance(inInstance)
        , m_Property(inProperty)
        , m_Index(inIndex)
        , m_AnimationType(inAnimationType)
        , m_DynamicFirstKeyframe(inDynamicFirstKeyframe)
        , m_ArtistEdited(inArtistEdited)
    {
    }
};

typedef std::pair<SAnimationInfo, TKeyframeList> TAnimationKeyframesPair;
typedef std::vector<TAnimationKeyframesPair> TAnimationKeyframesPairList;
typedef std::vector<SAnimationInfo> TAnimationInfoList;

/**
 *	Pure animation core.  Not wrapped in any niceties.
 */
class IAnimationCore
{
public:
    virtual ~IAnimationCore() {}
    virtual Qt3DSDMAnimationHandle CreateAnimation(Qt3DSDMSlideHandle inSlide,
                                                  Qt3DSDMInstanceHandle inInstance,
                                                  Qt3DSDMPropertyHandle inProperty, size_t inIndex,
                                                  EAnimationType inAnimationType,
                                                  bool inFirstKeyframeDynamic) = 0;
    virtual void DeleteAnimation(Qt3DSDMAnimationHandle inAnimation) = 0;
    virtual Qt3DSDMAnimationHandle GetAnimation(Qt3DSDMSlideHandle inSlide,
                                               Qt3DSDMInstanceHandle inInstance,
                                               Qt3DSDMPropertyHandle inProperty,
                                               size_t inIndex) const = 0;
    virtual SAnimationInfo GetAnimationInfo(Qt3DSDMAnimationHandle inAnimation) const = 0;
    virtual void GetAnimations(TAnimationHandleList &outAnimations) const = 0;
    virtual void GetAnimations(TAnimationInfoList &outAnimations,
                               Qt3DSDMSlideHandle inMaster = Qt3DSDMSlideHandle(),
                               Qt3DSDMSlideHandle inSlide = Qt3DSDMSlideHandle()) const = 0;

    virtual void GetSpecificInstanceAnimations(Qt3DSDMSlideHandle inSlide,
                                               Qt3DSDMInstanceHandle inInstance,
                                               TAnimationHandleList &outAnimations) = 0;

    virtual void SetFirstKeyframeDynamic(Qt3DSDMAnimationHandle inAnimation, bool inValue) = 0;

    // keyframe manipulation
    virtual Qt3DSDMKeyframeHandle InsertKeyframe(Qt3DSDMAnimationHandle inAnimation,
                                                const TKeyframe &inKeyframe) = 0;
    virtual void EraseKeyframe(Qt3DSDMKeyframeHandle inKeyframe) = 0;
    virtual void DeleteAllKeyframes(Qt3DSDMAnimationHandle inAnimation) = 0;

    // All of these mutators will force the artist edited property
    // of the animation to true.
    virtual Qt3DSDMAnimationHandle
    GetAnimationForKeyframe(Qt3DSDMKeyframeHandle inKeyframe) const = 0;
    virtual TKeyframe GetKeyframeData(Qt3DSDMKeyframeHandle inKeyframe) const = 0;
    virtual void SetKeyframeData(Qt3DSDMKeyframeHandle inKeyframe, const TKeyframe &inData) = 0;
    virtual void GetKeyframes(Qt3DSDMAnimationHandle inAnimation,
                              TKeyframeHandleList &outKeyframes) const = 0;
    virtual size_t GetKeyframeCount(Qt3DSDMAnimationHandle inAnimation) const = 0;
    virtual bool IsFirstKeyframe(Qt3DSDMKeyframeHandle inKeyframe) const = 0;

    virtual void OffsetAnimations(Qt3DSDMSlideHandle inSlide, Qt3DSDMInstanceHandle inInstance,
                                  long inOffset) = 0;

    // Direct mutators of the artist edited feature of animations
    virtual void SetIsArtistEdited(Qt3DSDMAnimationHandle inAnimation, bool inEdited = true) = 0;
    virtual bool IsArtistEdited(Qt3DSDMAnimationHandle inAnimation) const = 0;

    // Animation Evaluation.
    virtual float EvaluateAnimation(Qt3DSDMAnimationHandle inAnimation, float inSeconds) const = 0;

    virtual bool KeyframeValid(Qt3DSDMKeyframeHandle inKeyframe) const = 0;
    virtual bool AnimationValid(Qt3DSDMAnimationHandle inAnimation) const = 0;

    virtual void CopyAnimations(Qt3DSDMSlideHandle inSourceSlide,
                                Qt3DSDMInstanceHandle inSourceInstance,
                                Qt3DSDMSlideHandle inDestSlide,
                                Qt3DSDMInstanceHandle inDestInstance) = 0;
};

typedef std::shared_ptr<IAnimationCore> TAnimationCorePtr;

struct SGetOrSetKeyframeInfo
{
    float m_Value = 0.0;
    float m_EaseIn = -1.f;
    float m_EaseOut = -1.f;
    bool m_AnimationTrackIsDynamic = false;

    SGetOrSetKeyframeInfo(float inValue, float inEaseIn = -1.f, float inEaseOut = -1.f,
                          bool inDynamic = false)
        : m_Value(inValue)
        , m_EaseIn(inEaseIn)
        , m_EaseOut(inEaseOut)
        , m_AnimationTrackIsDynamic(inDynamic)
    {
    }
    SGetOrSetKeyframeInfo() = default;

};
/**
 *	Interface from studio into the animation system that speaks
 *	a language near to that of studio.  Public interface.
 */
class IStudioAnimationSystem
{
public:
    virtual ~IStudioAnimationSystem() {}

    /**
     *	When auto-keyframing is on, all calls to setinstancepropertyvalue will
     *	case a keyframe to be set if the instance is a member of a slide graph.
     */
    virtual void SetAutoKeyframe(bool inAutoKeyframe) = 0;
    /**
     *	Returns true when auto keyframing is set.
     */
    virtual bool GetAutoKeyframe() const = 0;
    /**
     *	Create animation on the property on this instance. If the property was animated and had
     *keyframes previously,
     *	this function will also set the keyframes accordingly.
     */
    virtual void Animate(Qt3DSDMInstanceHandle inInstance, Qt3DSDMPropertyHandle inProperty) = 0;
    /**
     *	Delete animation on the property on this instance
     */
    virtual void Deanimate(Qt3DSDMInstanceHandle inInstance, Qt3DSDMPropertyHandle inProperty) = 0;
    /**
     *	Set a keyframe on this property.  Uses the current time of the slide graph.
     *	If the keyframe is within a given time distance of another, this function will simply change
     *	the keyframed value of the other property to match the current value of this property.
     */
    virtual void KeyframeProperty(Qt3DSDMInstanceHandle inInstance, Qt3DSDMPropertyHandle inProperty,
                                  bool inDoDiffValue) = 0;
    /**
     *	Set the value of a existing a keyframe or create a new one, on this property, at the given
     *time.
     *  If ease in or ease out are unset then the keyframe gets the default ease in or out.
     */
    virtual void SetOrCreateKeyframe(Qt3DSDMInstanceHandle inInstance,
                                     Qt3DSDMPropertyHandle inProperty, float inTimeInSeconds,
                                     SGetOrSetKeyframeInfo *inKeyframeInfo, size_t inNumInfos) = 0;
    /**
     *	Return the animation that is currently controlling this property.  This function will return
     *	an invalid handle value if there is currently no animation controlling this property.
     */
    virtual Qt3DSDMAnimationHandle GetControllingAnimation(Qt3DSDMInstanceHandle inInstance,
                                                          Qt3DSDMPropertyHandle inProperty,
                                                          size_t inIndex) const = 0;

    /**
     *	Return true if the given property is animatable.  You can begin animation by calling
     *KeyframeProperty *or*
     *	by setting auto keyframe to on and setting a property value through the
     *IInstancePropertyCore system.
     */
    virtual bool IsPropertyAnimatable(Qt3DSDMInstanceHandle inInstance,
                                      Qt3DSDMPropertyHandle inProperty) const = 0;

    /**
     *	Return true if the given property is animated. Currently, either 0 or ALL channels are
     *animated. Hence, checking for index = 0 suffices.
     *	And if that changes, this function can be updated accordingly.
     */
    virtual bool IsPropertyAnimated(Qt3DSDMInstanceHandle inInstance,
                                    Qt3DSDMPropertyHandle inProperty) const = 0;

    /**
     *	Specify if new keyframes should be created with smooth ( ie Ease In/Out values = 100 ) or
     *linear ( Ease In/Out values = 0 )
     */
    virtual void SetInterpolation(bool inSmooth) = 0;

    /**
     *	Get an instance property value.  Will override outValue only if the slide, instance,
     *property is animated.
     */
    virtual bool GetAnimatedInstancePropertyValue(Qt3DSDMSlideHandle inSlide,
                                                  Qt3DSDMInstanceHandle inInstance,
                                                  Qt3DSDMPropertyHandle inProperty,
                                                  SValue &outValue) const = 0;
    /**
     *	Set an instance property value.  Will return true in the cases where
     *	the property is actually animated.  May only set local values, or may auto set a keyframed
     *value.
     */
    virtual bool SetAnimatedInstancePropertyValue(Qt3DSDMSlideHandle inSlide,
                                                  Qt3DSDMInstanceHandle inInstance,
                                                  Qt3DSDMPropertyHandle inProperty,
                                                  const SValue &inValue) = 0;

    typedef std::function<void(Qt3DSDMInstanceHandle instance)> TRefreshCallbackFunc;
    virtual void setRefreshCallback(TRefreshCallbackFunc func) = 0;
};

typedef std::shared_ptr<IStudioAnimationSystem> TStudioAnimationSystemPtr;

inline SLinearKeyframe CreateLinearKeyframe(float inSeconds, float inValue)
{
    SLinearKeyframe retval = { inSeconds, inValue };
    return retval;
}

inline SBezierKeyframe CreateBezierKeyframe(float inSeconds, float inValue, float inInTangentTime,
                                            float inInTangentValue, float inOutTangentTime,
                                            float inOutTangentValue)
{
    SBezierKeyframe theBezierKeyframe;
    theBezierKeyframe.m_KeyframeSeconds = inSeconds;
    theBezierKeyframe.m_KeyframeValue = inValue;
    theBezierKeyframe.m_InTangentTime = inInTangentTime;
    theBezierKeyframe.m_InTangentValue = inInTangentValue;
    theBezierKeyframe.m_OutTangentTime = inOutTangentTime;
    theBezierKeyframe.m_OutTangentValue = inOutTangentValue;
    return theBezierKeyframe;
}

inline SEaseInEaseOutKeyframe CreateEaseInEaseOutKeyframe(float inSeconds, float inValue,
                                                          float inEaseIn, float inEaseOut)
{
    SEaseInEaseOutKeyframe retval;
    retval.m_KeyframeSeconds = inSeconds;
    retval.m_KeyframeValue = inValue;
    retval.m_EaseIn = inEaseIn;
    retval.m_EaseOut = inEaseOut;
    return retval;
}

inline SAnimationInfo CreateAnimationInfo(Qt3DSDMSlideHandle inSlide,
                                          Qt3DSDMInstanceHandle inInstance,
                                          Qt3DSDMPropertyHandle inProperty, size_t inIndex,
                                          EAnimationType inAnimationType,
                                          bool inFirstKeyframeDynamic, bool inArtistEdited)
{
    SAnimationInfo retval(inSlide, inInstance, inProperty, inIndex, inAnimationType,
                          inFirstKeyframeDynamic, inArtistEdited);
    return retval;
}

struct SKeyframeValueVisitor
{
    float operator()(const SLinearKeyframe &inKeyframe) const { return inKeyframe.m_KeyframeValue; }
    float operator()(const SBezierKeyframe &inKeyframe) const { return inKeyframe.m_KeyframeValue; }
    float operator()(const SEaseInEaseOutKeyframe &inKeyframe) const
    {
        return inKeyframe.m_KeyframeValue;
    }
    float operator()()
    {
        QT3DS_ASSERT(false);
        return 0.0f;
    }
};

inline float KeyframeValueValue(const TKeyframe &inKeyframe)
{
    return inKeyframe.visit<float>(SKeyframeValueVisitor());
}

struct SKeyframeTimeAnalyzer
{
    float operator()(const SLinearKeyframe &inValue) const { return inValue.m_KeyframeSeconds; }
    float operator()(const SBezierKeyframe &inValue) const { return inValue.m_KeyframeSeconds; }
    float operator()(const SEaseInEaseOutKeyframe &inValue) const
    {
        return inValue.m_KeyframeSeconds;
    }
    float operator()()
    {
        QT3DS_ASSERT(false);
        return 0.0f;
    }
};

inline float KeyframeTime(const TKeyframe &inValue)
{
    return inValue.visit<float>(SKeyframeTimeAnalyzer());
}

inline EAnimationType GetKeyframeType(const TKeyframe &inKeyframe)
{
    return inKeyframe.getType();
}

struct SAnimatableArityVisitor
{
    std::tuple<bool, size_t> operator()(bool) const
    {
        return std::tuple<bool, size_t>(true, 1);
    }
    std::tuple<bool, size_t> operator()(long) const
    {
        return std::tuple<bool, size_t>(true, 1);
    }
    std::tuple<bool, size_t> operator()(float) const
    {
        return std::tuple<bool, size_t>(true, 1);
    }
    std::tuple<bool, size_t> operator()(const SFloat2 &) const
    {
        return std::tuple<bool, size_t>(true, 2);
    }
    std::tuple<bool, size_t> operator()(const SFloat3 &) const
    {
        return std::tuple<bool, size_t>(true, 3);
    }
    std::tuple<bool, size_t> operator()(const SFloat4 &) const
    {
        return std::tuple<bool, size_t>(true, 4);
    }
    template <typename TDataType>
    std::tuple<bool, size_t> operator()(const TDataType &) const
    {
        return std::tuple<bool, size_t>(false, 0);
    }
    std::tuple<bool, size_t> operator()()
    {
        QT3DS_ASSERT(false);
        return std::tuple<bool, size_t>(false, 0);
    }
};

inline std::tuple<bool, size_t> GetVariantAnimatableAndArity(const SValue &inValue)
{
    return inValue.visit<std::tuple<bool, size_t>>(SAnimatableArityVisitor());
}

inline std::tuple<bool, size_t> GetDatatypeAnimatableAndArity(DataModelDataType::Value inDataType)
{
    switch (inDataType) {
    case DataModelDataType::Long:
    case DataModelDataType::Float:
        return std::make_tuple(true, 1);

    case DataModelDataType::Float2:
        return std::make_tuple(true, 2);

    case DataModelDataType::Float3:
        return std::make_tuple(true, 3);

    case DataModelDataType::Float4:
        return std::make_tuple(true, 4);

    default:
        return std::make_tuple(false, 0);
    }
}

template <typename TDataType>
inline TDataType SetFloatValue(float inValue, size_t inIndex, const TDataType &inDataType)
{
    TDataType retval(inDataType);
    retval[inIndex] = inValue;
    return retval;
}

struct SAnimationApplier
{
    float m_Value;
    size_t m_Index;
    SValue operator()(const bool &) { return m_Value > 0.5f; }
    SValue operator()(const qt3ds::QT3DSI32 &) { return static_cast<qt3ds::QT3DSI32>(m_Value + .5f); }
    SValue operator()(const float &) { return m_Value; }
    SValue operator()(const SFloat2 &inValue) { return SetFloatValue(m_Value, m_Index, inValue); }
    SValue operator()(const SFloat3 &inValue) { return SetFloatValue(m_Value, m_Index, inValue); }
    SValue operator()(const SFloat4 &inValue) { return SetFloatValue(m_Value, m_Index, inValue); }
    template <typename TDataType>
    SValue operator()(const TDataType &inValue)
    {
        return inValue;
    }
    SValue operator()()
    {
        QT3DS_ASSERT(false);
        return SValue();
    }
};

inline void SetAnimationValue(float inValue, size_t inIndex, SValue &ioValue)
{
    using namespace std;
    SAnimationApplier theApplier;
    theApplier.m_Value = inValue;
    theApplier.m_Index = inIndex;
    ioValue = ioValue.visit<SValue>(theApplier);
}

template <typename TDataType>
inline float GetFloatValue(const TDataType &inValue, size_t inIndex)
{
    return inValue[inIndex];
}

struct SAnimationGetter
{
    size_t m_Index;
    float operator()(const bool &inValue) const { return inValue ? 1.f : 0.f; }
    float operator()(const long &inValue) const { return static_cast<float>(inValue); }
    float operator()(const float &inValue) const { return inValue; }
    float operator()(const SFloat2 &inValue) const { return GetFloatValue(inValue, m_Index); }
    float operator()(const SFloat3 &inValue) const { return GetFloatValue(inValue, m_Index); }
    float operator()(const SFloat4 &inValue) const { return GetFloatValue(inValue, m_Index); }
    template <typename TDataType>
    float operator()(const TDataType & /*inValue*/) const
    {
        return 0.f;
    }
    float operator()()
    {
        QT3DS_ASSERT(false);
        return 0.0f;
    }
};

inline float GetAnimationValue(size_t inIndex, const SValue &ioValue)
{
    SAnimationGetter theGetter;
    theGetter.m_Index = inIndex;
    return ioValue.visit<float>(theGetter);
}

struct SKeyframeTimeSetter
{
    float m_Seconds;
    TKeyframe operator()(const SLinearKeyframe &inValue) const
    {
        return CreateLinearKeyframe(m_Seconds, inValue.m_KeyframeValue);
    }
    TKeyframe operator()(const SBezierKeyframe &inValue) const
    {
        return CreateBezierKeyframe(m_Seconds, inValue.m_KeyframeValue, inValue.m_InTangentTime,
                                    inValue.m_InTangentValue, inValue.m_OutTangentTime,
                                    inValue.m_OutTangentValue);
    }
    TKeyframe operator()(const SEaseInEaseOutKeyframe &inValue) const
    {
        return CreateEaseInEaseOutKeyframe(m_Seconds, inValue.m_KeyframeValue, inValue.m_EaseIn,
                                           inValue.m_EaseOut);
    }
    TKeyframe operator()()
    {
        QT3DS_ASSERT(false);
        return TKeyframe();
    }
};

inline TKeyframe SetKeyframeSeconds(const TKeyframe &inKeyframe, float inSeconds)
{
    SKeyframeTimeSetter theSetter;
    theSetter.m_Seconds = inSeconds;
    return inKeyframe.visit<TKeyframe>(theSetter);
}

struct SKeyframeTimeGetter
{
    template <typename TKeyframeType>
    float operator()(const TKeyframeType &inValue) const
    {
        return inValue.m_KeyframeSeconds;
    }
    float operator()()
    {
        QT3DS_ASSERT(false);
        return 0.0f;
    }
};

inline float GetKeyframeSeconds(const TKeyframe &inKeyframe)
{
    SKeyframeTimeGetter theGetter;
    return inKeyframe.visit<float>(theGetter);
}

struct SKeyframeValueSetter
{
    float m_Value;
    TKeyframe operator()(const SLinearKeyframe &inValue) const
    {
        return CreateLinearKeyframe(inValue.m_KeyframeSeconds, m_Value);
    }
    TKeyframe operator()(const SBezierKeyframe &inValue) const
    {
        return CreateBezierKeyframe(inValue.m_KeyframeSeconds, m_Value, inValue.m_InTangentTime,
                                    inValue.m_InTangentValue, inValue.m_OutTangentTime,
                                    inValue.m_OutTangentValue);
    }
    TKeyframe operator()(const SEaseInEaseOutKeyframe &inValue) const
    {
        return CreateEaseInEaseOutKeyframe(inValue.m_KeyframeSeconds, m_Value, inValue.m_EaseIn,
                                           inValue.m_EaseOut);
    }
    TKeyframe operator()()
    {
        QT3DS_ASSERT(false);
        return TKeyframe();
    }
};

inline TKeyframe SetKeyframeValue(const TKeyframe &inKeyframe, float inValue)
{
    SKeyframeValueSetter theSetter;
    theSetter.m_Value = inValue;
    return inKeyframe.visit<TKeyframe>(theSetter);
}

inline float AnimationClamp(float inLowerBound, float inUpperBound, float inValue)
{
    if (inValue < inLowerBound)
        return inLowerBound;
    if (inValue > inUpperBound)
        return inUpperBound;
    return inValue;
}

inline SBezierKeyframe
CreateBezierKeyframeFromEaseInEaseOutKeyframe(float *inPreviousValue,
                                              SEaseInEaseOutKeyframe inCurrent, float *inNextValue)
{
    float theValue = inCurrent.m_KeyframeValue;
    float theSeconds = inCurrent.m_KeyframeSeconds;
    float inSeconds = 0.f;
    float inValue = 0.f;
    float outSeconds = 0.f;
    float outValue = 0.f;
    if (inPreviousValue) {
        float thePercent = 1.0f - AnimationClamp(0.0f, 1.0f, inCurrent.m_EaseIn / 100.f);
        double theAmount = 1.0f - thePercent * .333333333334;
        inValue = (float)(*inPreviousValue
                          + ((inCurrent.m_KeyframeValue - *inPreviousValue) * theAmount));
    }
    if (inNextValue) {
        float thePercent = 1.0f - AnimationClamp(0.0f, 1.0f, inCurrent.m_EaseOut / 100.f);
        double theAmount = thePercent * .3333333333334;
        outValue = (float)(inCurrent.m_KeyframeValue
                           + ((*inNextValue - inCurrent.m_KeyframeValue) * theAmount));
    }
    return CreateBezierKeyframe(theSeconds, theValue, inSeconds, inValue, outSeconds, outValue);
}

void CopyKeyframes(const IAnimationCore &inSourceAnimationCore, IAnimationCore &inDestAnimationCore,
                   Qt3DSDMAnimationHandle inDestAnimation, const TKeyframeHandleList &inKeyframes);

Qt3DSDMAnimationHandle CopyAnimation(TAnimationCorePtr inSourceAnimationCore,
                                     Qt3DSDMAnimationHandle inAnimation,
                                     Qt3DSDMSlideHandle inNewSlide,
                                     Qt3DSDMInstanceHandle inNewInstance,
                                     Qt3DSDMPropertyHandle inNewProperty, size_t inNewIndex);

struct SEaseInGetter
{
    float operator()(const SLinearKeyframe &) const { return 0.f; }
    float operator()(const SBezierKeyframe &) const { return 0.f; }
    float operator()(const SEaseInEaseOutKeyframe &inValue) const { return inValue.m_EaseIn; }
    float operator()()
    {
        QT3DS_ASSERT(false);
        return 0.0f;
    }
};
struct SEaseOutGetter
{
    float operator()(const SLinearKeyframe &) const { return 0.f; }
    float operator()(const SBezierKeyframe &) const { return 0.f; }
    float operator()(const SEaseInEaseOutKeyframe &inValue) const { return inValue.m_EaseOut; }
    float operator()()
    {
        QT3DS_ASSERT(false);
        return 0.0f;
    }
};
inline void GetEaseInOutValues(const TKeyframe &inValue, float &outEaseIn, float &outEaseOut)
{
    SEaseInGetter theGetter;
    outEaseIn = inValue.visit<float>(theGetter);

    SEaseOutGetter theEaseOutGetter;
    outEaseOut = inValue.visit<float>(theEaseOutGetter);
}

struct SEaseInSetter
{
    float m_Value;
    TKeyframe operator()(SLinearKeyframe &inValue) const { return inValue; }
    TKeyframe operator()(SBezierKeyframe &inValue) const { return inValue; }
    TKeyframe operator()(SEaseInEaseOutKeyframe &inKeyframe) const
    {
        inKeyframe.m_EaseIn = m_Value;
        return inKeyframe;
    }
    TKeyframe operator()()
    {
        QT3DS_ASSERT(false);
        return TKeyframe();
    }
};
struct SEaseOutSetter
{
    float m_Value;
    TKeyframe operator()(SLinearKeyframe &inValue) const { return inValue; }
    TKeyframe operator()(SBezierKeyframe &inValue) const { return inValue; }
    TKeyframe operator()(SEaseInEaseOutKeyframe &inKeyframe) const
    {
        inKeyframe.m_EaseOut = m_Value;
        return inKeyframe;
    }
    TKeyframe operator()()
    {
        QT3DS_ASSERT(false);
        return TKeyframe();
    }
};
inline TKeyframe SetEaseInOutValues(TKeyframe &inKeyframe, float inEaseIn, float inEaseOut)
{
    SEaseInSetter theSetter;
    theSetter.m_Value = inEaseIn;
    inKeyframe.visit<TKeyframe>(theSetter);

    SEaseOutSetter theEaseOutSetter;
    theEaseOutSetter.m_Value = inEaseOut;
    inKeyframe.visit<TKeyframe>(theEaseOutSetter);

    return inKeyframe;
}

void GetKeyframesAsBezier(Qt3DSDMAnimationHandle inAnimation, const IAnimationCore &inAnimationCore,
                          TBezierKeyframeList &outKeyframes);
}

#endif