#ifndef ANIMATION_H
#define ANIMATION_H

#include <vector>

#include "render_shared.h"

#define INVALID_ANIMATION_HANDLE -1

// Animation types
typedef /*int16_t*/ int AnimationId_t;

class Model;

/* Joint */
struct Joint
{
	char name[64];
	int parentId;

	glm::vec3 origin;
	glm::quat orient;
};

/* Animation */
struct Animation
{
	char name[64];
	uint32_t numPoses;
	uint32_t numFrames;
	float framerate;
	std::vector< glm::vec3 > origin;
	std::vector< glm::quat > orient;
};

/* Skeleton */
class SkeletonInstance
{
public:
	Model* m_model;
	std::vector<Joint> m_joints;
	std::vector<glm::mat4> m_jointMatrices;
	std::vector<glm::mat4> m_finalMatrices;
	AnimationId_t m_animation;
	float m_time;
	float m_speed;
	bool m_looped;

public:
	SkeletonInstance();
	~SkeletonInstance();

	bool IsValid();

	void LoadAnimation(const char* filename);

	AnimationId_t FindAnimation(const char* name);
	uint32_t GetNumAnimations();
	float GetAnimationTime(AnimationId_t id);

	void PlayAnimation(AnimationId_t id, bool looped);
	void StopAnimation();

	void SetAnimationSpeed(float speed);

	AnimationId_t GetCurrentAnimation();
	float GetCurrentTime();

};

#endif // !ANIMATION_H