#pragma once

#include<cglm/mat4.h>
#include<cglm/quat.h>
#include<stdint.h>
#include<stddef.h>

struct k3AnimationBone {
	vec4 translation;
	versor rotation;
};

enum k3AnimationOp {
	k3_ANIM_BASIC,
	k3_ANIM_BLEND,
	k3_ANIM_ADD,
};

struct k3AnimationFountain {
	float fps;
	size_t frameCount;
	size_t bones;
	uint16_t id;
	_Alignas(16) struct k3AnimationBone frames[];
};

struct k3Animation {
	enum k3AnimationOp op;
	size_t bones;
	struct k3AnimationBone *cache;
	size_t ref;
};

struct k3AnimationBasic {
	enum k3AnimationOp op;
	size_t bones;
	struct k3AnimationBone *cache;
	size_t ref;
	
	struct k3AnimationFountain *fountain;
	bool loop;
};

struct k3AnimationBlend {
	enum k3AnimationOp op;
	size_t bones;
	struct k3AnimationBone *cache;
	size_t ref;
	
	size_t children;
	float *offsets;
	float *speeds;
	float *weights;
	struct k3Animation **subs;
};

struct k3AnimationAdd {
	enum k3AnimationOp op;
	size_t bones;
	struct k3AnimationBone *cache;
	size_t ref;
	
	struct k3Animation *sub1;
	struct k3Animation *sub2;
	
	float scale;
};

bool k3AnimationUpdate(struct k3Animation *anim, float time);
void k3AnimationFree(struct k3Animation *anim);