#ifndef SNAKE_H
#define SNAKE_H

struct GridStruct;

typedef struct Position
{
    int x;
    int y;
    struct Position *next;
} Position;

typedef enum
{
    TOP,
    BOTTOM,
    LEFT,
    RIGHT
} Direction;

struct SnakeStruct
{
    Position *segments_list;
    int size;
    Direction dir;
};

typedef struct SnakeStruct Snake;

Snake *new_snake(void);
void add_segment(Snake *snake, int x, int y);
void free_snake(Snake *snake);
void debug_snake(Snake *snake);
void crawl(Snake *snake, struct GridStruct *g);
Direction determine_initial_direction(struct GridStruct *g, Position *head);

#endif /* SNAKE_H */