#pragma once

#include <Core/Container/Vector.h>
#include <Entity/entity_common.h>

typedef struct World          World;
typedef struct EntityTemplate EntityTemplate;
typedef struct Entity         Entity;
typedef struct Class          Class;
typedef struct Archive        Archive;

typedef struct typed_entity_array typed_entity_array;
struct typed_entity_array
{
    Arena*          arena;
    EntityTemplate* array;
    size_t          count;
};

typedef struct EntityManager EntityManager;
struct EntityManager
{
    uint64 next_local_counter;

    // TODO: Should be a pool
    VectorArena Entities;

    typed_entity_array by_type[Entity_Type_Count];
};

extern EntityID g_entity_manager_id;

void            InitEntityManager(World* world);
void            ShutdownEntityManager(void);
EntityManager*  GetEntityManager(void);
EntityTemplate* RegisterEntity(EntityManager* manager, Entity* base, DerivedType entity);
Entity*         allocate_entity(EntityManager* manager, const Class* derived_type_class);
void            UpdateEntityManager(EntityManager* manager);
Entity*         deserialize_entity(Archive* archive, EntityManager* manager);
void            update_local_counter(EntityManager* manager, EntityID entity_id);