#ifndef NS_STR_H
#define NS_STR_H

#include <assert.h>
#include <stdlib.h>
#include <string.h>

struct Str_T {
  char *arr;
  size_t len;
  size_t cap;
};

typedef struct Str_T Str;

static void ns_str_init_empty(Str *nstr, size_t capactiy) {
  nstr->len = 0;
  nstr->cap = capactiy;
  nstr->arr = calloc(nstr->cap, sizeof(char));
}

static void ns_str_push_char(Str *nstr, char c) {
  if (nstr->len + 2 > nstr->cap) {
    nstr->cap += 8;
    nstr->arr = realloc(nstr->arr, nstr->cap * sizeof(char));
    assert(nstr->arr != NULL);
  }
  nstr->arr[nstr->len] = c;
  nstr->len++;
  nstr->arr[nstr->len] = '\0';
}

static void ns_str_push(Str *nstr, char *str) {
  size_t strlen_str = strlen(str);
  if (nstr->len + strlen_str + 1 > nstr->cap) {
    nstr->cap = nstr->len + strlen_str + 8;
    nstr->arr = realloc(nstr->arr, nstr->cap * sizeof(char));
    assert(nstr->arr != NULL);
  }
  strncpy(nstr->arr + nstr->len, str, nstr->cap - nstr->len);
  nstr->len = nstr->len + strlen_str;
}

static void ns_str_set(Str *nstr, char *str) {
  size_t strlen_str = strlen(str);
  nstr->cap = strlen_str + 1;
  nstr->arr = realloc(nstr->arr, nstr->cap * sizeof(char));
  assert(nstr->arr != NULL);
  strncpy(nstr->arr, str, nstr->cap);
  nstr->len = strlen_str;
}

static void ns_str_destroy(Str *nstr) {
  free(nstr->arr);
  nstr->arr = NULL;
  nstr->len = 0;
  nstr->cap = 0;
}

#endif