#include "snake.h"
#include <stdlib.h>

struct snake* add_snake(struct snake* snake,int x,int y){
    struct snake* hlavicka = calloc(1,sizeof(struct snake));

    hlavicka->x = x;
    hlavicka->y = y;
    
    hlavicka->next = snake;
    
    return hlavicka;
}

struct snake* remove_snake(struct snake* snake){
    if (snake == NULL) {
        return NULL; 
    }

    struct snake* nova_hlavicka = snake->next;

    free(snake);

    if (nova_hlavicka == NULL) {
        return NULL;
    }

    struct snake* chvost = nova_hlavicka;
    while (chvost->next != NULL) {
        chvost = chvost->next;
    }

    chvost->next = NULL;

    return nova_hlavicka;
}

void free_snake(struct snake* sn){
}

int is_snake(struct snake* snake,int x,int y){
    return 0;
}

int step_state(struct state* st){
	int nx = (st->snake->x + st->sx);
    int ny = (st->snake->y + st->sy);
    return END_CONTINUE;
}