#include "stdio.h"
#include "stretchy_buffer.h"

typedef enum {
  DRAWABLE     = 1 << 0,
  COLLIDABLE   = 1 << 1,
  CONTROLLABLE = 1 << 2,
} flag_t;

typedef struct entity_t entity_t;
typedef struct world_t world_t;
typedef struct callback_t callback_t;

struct callback_t {
  unsigned int filter;
  void(*func)(world_t *, entity_t *);
};

struct entity_t {
  unsigned long type, destroy, id;
  void *self;
};

struct world_t {
  unsigned int count;
  entity_t *entities;
  callback_t *cb;
};

world_t *world_new() {
  world_t *self = calloc(1, sizeof(*self));
  self->count = 0;
  self->entities = NULL;
  self->cb = NULL;
  return self;
}

void world_push(world_t *self, entity_t *e) {
  sb_push(self->entities, e);
  self->count = sb_count(self->entities);
}

int main(void) {
  // entity_t bar = { .type = DRAW | COLLISION, .data = NULL };
  return 0;
}