#ifndef snake_h_INCLUDED
#define snake_h_INCLUDED

#define FOOD_COUNT 20

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

enum endgame {
    END_CONTINUE = 0,
    END_WALL,
    END_SNAKE,
    END_FOOD,
    END_USER
};

struct state {
    struct snake* snake;
    int foodx[FOOD_COUNT];
    int foody[FOOD_COUNT];
    int sx;
    int sy;
    int width;
    int height;
};

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