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

struct snake* add_snake (struct snake* snake, int x, int y) {
    struct snake* head = NULL;

    head = malloc(sizeof(struct snake));

    if (!head) {
        return snake;
    }    
        head->x = x;
        head->y = y;

        head->next = NULL;

        if (snake !=NULL) {
            head->next = snake;
        }
        return head;
}

struct snake* remove_snake(struct snake* snake) {
    if(snake == NULL || snake-> next == NULL) {
        free(snake);
        return NULL;
    }

    struct snake* previous = NULL;
    struct snake* current = NULL;
    while (current->next !=NULL) {
        previous = current;
        current = current->next;
    }

    if (previous !=NULL) {
        free(previous->next);
        previous->next = NULL;
    }
}