#pragma once

#include "aliases.h"

enum {
  ES_INIT_SUCCESS = 0,
  ES_INIT_NULL_POINTER,
  ES_INIT_ALREADY_INITIALISED,
  ES_INIT_ALLOCATION_FAILED,
};

typedef struct event Event;
struct event {
  u64 id;
};

typedef struct event_listener EventListener;
struct event_listener {
  Event event;
  u64 id;
};

typedef struct event_system EventSystem;

typedef void (EventCallback)(void *data);

u32           es_init(EventSystem **es, u64 initial_event_capacity, u64 initial_listeners_capacity);
void          es_deinit(EventSystem **es);
Event         es_register_event(EventSystem *es);
void          es_deregister_event(EventSystem *es, Event event);
EventListener es_add_event_listener(EventSystem *es, u64 id, EventCallback *listener);
void          es_remove_event_listener(EventSystem *es, EventListener listener);
void          es_emit_event(EventSystem *es, u64 id, void *data);