#ifndef ENTITY_H
#define ENTITY_H

#include <stdint.h>
#include <stdbool.h>

typedef uint16_t Entity_ID;

#define INVALID_ENTITY_ID (Entity_ID)65535

typedef enum {
    Entity_Movement_Direction_None,
    Entity_Movement_Direction_Up,
    Entity_Movement_Direction_Down,
    Entity_Movement_Direction_Right,
    Entity_Movement_Direction_Left,
} Entity_Movement_Direction;

typedef enum {
    Entity_Type_Snake_Head,
    Entity_Type_Snake_Body,
    Entity_Type_Food,
} Entity_Type;

typedef struct {
    bool active;

    Entity_ID id;

    Entity_Type type;
    
    uint16_t x;
    uint16_t y;

    uint16_t prev_x;
    uint16_t prev_y;

    Entity_Movement_Direction move_direction;
    
    Entity_ID child;
} Entity;

#endif