#ifndef PKE_CAMERA_HPP
#define PKE_CAMERA_HPP

#include "pk.h"
#include "components.hpp"

#include <cstdint>

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

struct CameraHandle : public pk_bkt_arr_handle {};

constexpr CameraHandle CameraHandle_MAX = CameraHandle{ PK_BKT_ARR_HANDLE_B_MAX, PK_BKT_ARR_HANDLE_I_MAX };

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 {
		InstanceHandle instHandle = InstanceHandle_MAX;
		InstanceHandle target_inst_handle = InstanceHandle_MAX;
		pk_uuid target_inst_uuid = pk_uuid_zed;
		btTypedConstraint *constraint = nullptr;
	} phys;
	bool isPrimary = false;
};
extern PkeCamera NullCamera;
extern CompInstance NullCameraInstance;
extern PkeCamera *ActiveCamera;

void PkeCamera_Init();
PkeCamera &PkeCamera_Register(pk_uuid uuid, const InstPos &instPos);
PkeCamera *PkeCamera_Get(CameraHandle handle);
PkeCamera *PkeCamera_Get(EntityHandle handle);
void PkeCamera_TargetInstance(CameraHandle cameraHandle, CompInstance *inst);
void PkeCamera_UntargetInstance(CameraHandle cameraHandle);
pk_bkt_arr &PkeCamera_GetPkBktArr();
void PkeCamera_SetPrimary(CameraHandle handle);
void PkeCamera_Teardown();
void PkeCamera_Tick(double delta);

void PkeCamera_Unregister(uint64_t id);

#endif /* PKE_CAMERA_HPP */