#include <getopt.h>
#include <pwd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include "util/versie.h"
#include "util/error.h"
#include "util/debug.h"

static void usage(FILE *f) {
  fprintf(f,
      "Gebruik: wiebenik [-hV]\n"
      "\n"
      "Laat zien wie jij bent"
      "\n"
      "  -h    Toon deze hulptekst\n"
      "  -V    Toon versienummer\n");
}

// Returns pointer to argument array containing the file names
static char** parse_options(int argc, char **argv) {
  int opt;
  while ((opt = getopt(argc, argv, "hV")) != -1) {
    switch (opt) {
      case 'h':
        usage(stdout);
        exit(0);

      case 'V':
        drukkedoos_print_versie(stdout, "wiebenik");
        exit(0);

      case '?':
        usage(stderr);
        exit(1);
    }
  }

  return argv + optind;
}

int entry_wiebenik(int argc, char **argv) {
  parse_options(argc, argv);
  struct passwd *pw = getpwuid(geteuid());
  puts(pw->pw_name);
  return 0;
}