#include <locale.h>
#include <langinfo.h>
#include "locale_impl.h"
#include "libc.h"

static const char c_time[] =
    "Sun\0"
    "Mon\0"
    "Tue\0"
    "Wed\0"
    "Thu\0"
    "Fri\0"
    "Sat\0"
    "Sunday\0"
    "Monday\0"
    "Tuesday\0"
    "Wednesday\0"
    "Thursday\0"
    "Friday\0"
    "Saturday\0"
    "Jan\0"
    "Feb\0"
    "Mar\0"
    "Apr\0"
    "May\0"
    "Jun\0"
    "Jul\0"
    "Aug\0"
    "Sep\0"
    "Oct\0"
    "Nov\0"
    "Dec\0"
    "January\0"
    "February\0"
    "March\0"
    "April\0"
    "May\0"
    "June\0"
    "July\0"
    "August\0"
    "September\0"
    "October\0"
    "November\0"
    "December\0"
    "AM\0"
    "PM\0"
    "%a %b %e %T %Y\0"
    "%m/%d/%y\0"
    "%H:%M:%S\0"
    "%I:%M:%S %p\0"
    "\0"
    "\0"
    "%m/%d/%y\0"
    "0123456789\0"
    "%a %b %e %T %Y\0"
    "%H:%M:%S";

static const char c_messages[] =
    "^[yY]\0"
    "^[nN]\0"
    "yes\0"
    "no";
static const char c_numeric[] =
    ".\0"
    "";

char* __nl_langinfo_l(nl_item item, locale_t loc) {
  int cat = item >> 16;
  int idx = item & 65535;
  const char* str;

  if (item == CODESET)
    return MB_CUR_MAX == 1 ? "ASCII" : "UTF-8";

  switch (cat) {
    case LC_NUMERIC:
      if (idx > 1)
        return "";
      str = c_numeric;
      break;
    case LC_TIME:
      if (idx > 0x31)
        return "";
      str = c_time;
      break;
    case LC_MONETARY:
      if (idx > 0)
        return "";
      str = "";
      break;
    case LC_MESSAGES:
      if (idx > 3)
        return "";
      str = c_messages;
      break;
    default:
      return "";
  }

  for (; idx; idx--, str++)
    for (; *str; str++)
      ;
  if (cat != LC_NUMERIC && *str)
    str = LCTRANS(str, cat, loc);
  return (char*)str;
}

char* __nl_langinfo(nl_item item) {
  return __nl_langinfo_l(item, CURRENT_LOCALE);
}

weak_alias(__nl_langinfo, nl_langinfo);
weak_alias(__nl_langinfo_l, nl_langinfo_l);