#ifndef __GE_CORE_H__
#define __GE_CORE_H__

#include <ge_common.h>
#include <ecs/ge_entity.h>
#include <ecs/ge_render_system.h>
#include <ecs/ge_physics_system.h>

struct ge_engine_core;
typedef struct ge_engine_core ge_core_t;

/**
 * Callback Function
 */
typedef void (*ge_init_func_t)(ge_core_t* core);
typedef void (*ge_exit_func_t)(ge_core_t* core);
typedef void (*ge_run_func_t)(ge_core_t* core);

typedef enum ge_engine_state {
    GE_ENGINE_STATE_RUNNING,
    GE_ENGINE_STATE_EXIT,
} ge_engine_state_t;

struct ge_engine_core {
    struct {
        ge_init_func_t init;
        ge_exit_func_t exit;
        ge_run_func_t process;
    } callbacks;
    ge_engine_state_t state;
    ge_ecs_t ecs;
    DECLARE_GE_KFIFO(einput, ge_uptr_t, 16, ge_event_input_t);
    struct {
        ge_uint_t fps;
    } configs;
    void* context;
    
    struct {
        ge_render_system_t render;
        ge_physics_system_t physics;
    } _systems;
    ge_render_t _render;
    ge_timer_t _timer;
    ge_input_t _input;
    ge_run_func_t _inner_run;
    void* _inner_context;
};

/**
 * Basic Call
 */
int ge_main(ge_core_t* core);
void ge_engine_init(ge_core_t *core);
void ge_engine_run(ge_core_t *core);

#endif // __GE_CORE_H__