/* uuid_test.c
 * Exercising functions from libuuid (uuid(3))
 */

#include <assert.h>
#include <stdio.h>
#include <sys/time.h>
#include <time.h>
#include <uuid/uuid.h>

#define BUFFSIZE 100

int main() {
  uuid_t my_uuid;
  uuid_t my_uuid_copy;
  char my_uuid_string[37];
  time_t uuid_ctime;
  char ctime_string[BUFFSIZE] = {0};
  struct timeval uuid_ctimeval;

  /* Generate uuid */
  uuid_generate_time(my_uuid);
  assert(!uuid_is_null(my_uuid));

  /* Unparse to string */
  uuid_unparse(my_uuid, my_uuid_string);
  printf("Got UUID: %s\n", my_uuid_string);
  uuid_unparse_upper(my_uuid, my_uuid_string);
  printf("uppercase %s\n", my_uuid_string);

  /* Check creation time */
  uuid_ctime = uuid_time(my_uuid, &uuid_ctimeval);
  assert(strftime(ctime_string, BUFFSIZE,
                  "%I:%M:%S %p on %A %B %e, %Y",
                  gmtime(&uuid_ctime)));
  printf("\nUUID created at %s\n", ctime_string);
  printf("More precisely, calendar time: %ld.%06ld\n",
         uuid_ctimeval.tv_sec, uuid_ctimeval.tv_usec);

  /* Parse and compare */
  uuid_parse(my_uuid_string, my_uuid_copy);
  assert(!uuid_compare(my_uuid, my_uuid_copy));

  /* Clear */
  uuid_clear(my_uuid_copy);
  assert(uuid_is_null(my_uuid_copy));

  /* Copy */
  uuid_copy(my_uuid_copy, my_uuid);
  assert(!uuid_is_null(my_uuid_copy));
  assert(!uuid_compare(my_uuid, my_uuid_copy));

  /* Clear */
  uuid_clear(my_uuid);
  uuid_clear(my_uuid_copy);
  assert(uuid_is_null(my_uuid) && uuid_is_null(my_uuid_copy));

  return 0;
}