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#ifndef Spine_IkConstraintTimeline_h
#define Spine_IkConstraintTimeline_h

#include <spine/CurveTimeline.h>
#include <spine/ConstraintTimeline.h>

namespace spine {

	/// Changes an IK constraint's IkConstraintPose::getMix(), IkConstraintPose::getSoftness(),
	/// IkConstraintPose::getBendDirection(), IkConstraintPose::getStretch(), and IkConstraintPose::getCompress().
	class SP_API IkConstraintTimeline : public CurveTimeline, public ConstraintTimeline {
		friend class SkeletonBinary;

		friend class SkeletonJson;

		RTTI_DECL

	public:
		explicit IkConstraintTimeline(size_t frameCount, size_t bezierCount, int constraintIndex);

		virtual ~IkConstraintTimeline();

		virtual void apply(Skeleton &skeleton, float lastTime, float time, Array<Event *> *events, float alpha, MixBlend blend,
						   MixDirection direction, bool appliedPose) override;

		/// Sets the time, mix, softness, bend direction, compress, and stretch for the specified frame.
		/// @param frame Between 0 and frameCount, inclusive.
		/// @param time The frame time in seconds.
		/// @param bendDirection 1 or -1.
		void setFrame(int frame, float time, float mix, float softness, int bendDirection, bool compress, bool stretch);

		virtual int getConstraintIndex() const override {
			return _constraintIndex;
		}

		virtual void setConstraintIndex(int inValue) override {
			_constraintIndex = inValue;
		}

	private:
		int _constraintIndex;

		static const int ENTRIES = 6;
		static const int MIX = 1;
		static const int SOFTNESS = 2;
		static const int BEND_DIRECTION = 3;
		static const int COMPRESS = 4;
		static const int STRETCH = 5;
	};
}

#endif /* Spine_IkConstraintTimeline_h */