#ifndef GAME_H
#define GAME_H

#define FOOD_COUNT 3

#define END_CONTINUE 0
#define END_WALL 1
#define END_SNAKE 2
#define END_FOOD 3

struct snake {
    int x;
    int y;
    struct snake* next;
};

struct state {
    int width;
    int height;

    struct snake* snake;

    int sx;
    int sy;

    int foodx[FOOD_COUNT];
    int foody[FOOD_COUNT];
};

struct snake* add_snake(struct snake* snake, int x, int y);
struct snake* remove_snake(struct snake* snake);
int is_snake(struct snake* snake, int x, int y);
void free_snake(struct snake* sn);

int step_state(struct state* state);

#endif