#include "../includes/list.h"

List* CreateList() {
    List *new = malloc(sizeof(List));

    if (!new) {
        fprintf(stderr, "Failed to malloc() for new new List.\n");
        return NULL;
    }

    new->content = malloc(sizeof(void*) * LISTDEFAULTSIZE);

    if (!new->content) {
        fprintf(stderr, "Failed to malloc() memory for List contents.\n");
        free(new);
        return NULL;
    }

    new->size = 0;
    new->capacity = LISTDEFAULTSIZE;

    return new;
}

int AddListItem(const void *value, size_t size, List* list) {
    if (!list) return -1;
    if (!value) return -1;
    if (size == 0) return -1;

    if (list->capacity < list->size + 1) {
        void* ptr = realloc(list->content, sizeof(void*) * list->capacity * 2);
        //Note: realloc will free list->root if it succeeds.
        if (!ptr) {
            fprintf(stderr, "Failed to resize array with realloc() (%d bytes).\n", list->capacity * 2);
            return -1;
        }

        list->content = ptr;
        list->capacity = list->capacity * 2;
    }

    void* item = calloc(1, size);

    if (!item) {
        fprintf(stderr, "Failed to calloc() new memory (%lu bytes).\n", size);
        return -1;
    }

    memcpy(item, value, size);

    list->content[list->size] = item;
    list->size++;

    return 0;
}

void DestroyList(List* list) {
    if (!list) return;

    for(int i = 0; i < list->size; i++) {
        free(list->content[i]);
    }

    free(list->content);
    free(list);
}