#ifndef PKE_CAMERA_HPP
#define PKE_CAMERA_HPP

#include "components.hpp"
#include "macros.hpp"
#include "vendor/glm_include.hpp"
#include "memory-type-defs.hpp"

#include <cstdint>

TypeSafeInt_Const_Expr(PkeCameraType, uint8_t, 0xFF);
TypeSafeInt_Const_Expr(PkeCameraView, uint8_t, 0xFF);
TypeSafeInt_Const_Expr(PkeCameraStaleFlags, uint8_t, 0xFF);

struct CameraHandle : public PkeHandle {};

constexpr CameraHandle CameraHandle_MAX = CameraHandle{};

constexpr PkeCameraType PKE_CAMERA_TYPE_PERSPECTIVE = PkeCameraType{1 << 0};
constexpr PkeCameraType PKE_CAMERA_TYPE_ORTHOGONAL  = PkeCameraType{1 << 1};

constexpr PkeCameraView PKE_CAMERA_VIEW_TARGET = PkeCameraView{1 << 0};
constexpr PkeCameraView PKE_CAMERA_VIEW_FREE   = PkeCameraView{1 << 1};

constexpr PkeCameraStaleFlags PKE_CAMERA_STALE_POS         = PkeCameraStaleFlags{1 << 0};
constexpr PkeCameraStaleFlags PKE_CAMERA_STALE_ROT         = PkeCameraStaleFlags{1 << 1};
constexpr PkeCameraStaleFlags PKE_CAMERA_STALE_POSROT      = PkeCameraStaleFlags{1 << 0 | 1 << 1};
constexpr PkeCameraStaleFlags PKE_CAMERA_STALE_PERSPECTIVE = PkeCameraStaleFlags{1 << 2};
constexpr PkeCameraStaleFlags PKE_CAMERA_STALE_ALL         = PkeCameraStaleFlags{0xFF};

struct PkeCamera : public Entity_Base {
	CameraHandle camHandle = CameraHandle_MAX;
	PkeCameraType type = PkeCameraType_MAX;
	PkeCameraView view = PkeCameraView_MAX;
	PkeCameraStaleFlags stale = PkeCameraStaleFlags_MAX;
	struct Phys {
		CompInstance *inst = nullptr;
		CompInstance *targetInst = nullptr;
		btTypedConstraint *constraint = nullptr;
	} phys;
	bool isPrimary = false;
};
extern PkeCamera NullCamera;
extern PkeCamera *ActiveCamera;

void PkeCamera_Init();
PkeCamera &PkeCamera_Register(const InstPos &instPos);
PkeCamera *PkeCamera_Get(CameraHandle handle);
PkeCamera *PkeCamera_Get(EntityHandle handle);
void PkeCamera_AttachToInstance(CameraHandle cameraHandle, CompInstance *inst);
void PkeCamera_DetachFromInstance(CameraHandle cameraHandle, CompInstance *inst);
int64_t PkeCamera_GetBucketCount();
PkeCamera *PkeCamera_GetCameras(int64_t bucketIndex, int64_t &count);
void PkeCamera_SetPrimary(CameraHandle handle);
void PkeCamera_Destroy(CameraHandle handle);
void PkeCamera_Teardown();
void PkeCamera_Tick(double delta);

void PkeCamera_Unregister(uint64_t id);

#endif /* PKE_CAMERA_HPP */