#ifndef ENGINE_HPP
#define ENGINE_HPP

#include <stddef.h>
#define ROW 15
#define COL 21

typedef enum
{
	UP,
	DOWN,
	LEFT,
	RIGHT
} Direction;

typedef struct
{
	int x, y;
} vec2;

int
equals(vec2* a, vec2* b);

void
set(vec2* vec2, int _x, int _y);

typedef struct
{
	unsigned char view[ROW][COL];
	vec2 head;
	vec2 fruit;
	vec2 prev_head;
	int m_score;
	Direction dir;
	vec2* tail[(ROW * COL) - 1];
	int tail_size;

} Engine;

void
engine_init(Engine* engine);

void
engine_display(Engine* engine);

int
process_input(Direction* dir);

int
is_open(char* status, size_t len, Engine* engine);

void
determine_index_zero_pos(Engine* engine);

void
add_tail_and_respawn_fruit(Engine* engine);

void
move_tail_indicies(vec2** tail, int tail_size, vec2* prev_head,
		   unsigned char (*view)[COL]);

#endif