//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

// UNSUPPORTED: c++03, c++11, c++14, c++17
// UNSUPPORTED: no-localization
// UNSUPPORTED: libcpp-has-no-incomplete-format

// TODO FMT Investigate Windows issues.
// UNSUPPORTED: msvc, target={{.+}}-windows-gnu

// TODO FMT It seems GCC uses too much memory in the CI and fails.
// UNSUPPORTED: gcc-12

// TODO FMT This test should not require std::to_chars(floating-point)
// XFAIL: availability-fp_to_chars-missing

// REQUIRES: locale.fr_FR.UTF-8
// REQUIRES: locale.ja_JP.UTF-8

// <chrono>

// class year_month_weekday_last;

// template<class charT, class traits>
//   basic_ostream<charT, traits>&
//     operator<<(basic_ostream<charT, traits>& os, const year_month_weekday_last& ymwdl);

#include <chrono>
#include <cassert>
#include <sstream>

#include "make_string.h"
#include "platform_support.h" // locale name macros
#include "test_macros.h"

#define SV(S) MAKE_STRING_VIEW(CharT, S)

template <class CharT>
static std::basic_string<CharT> stream_c_locale(std::chrono::year_month_weekday_last ymwdl) {
  std::basic_stringstream<CharT> sstr;
  sstr << ymwdl;
  return sstr.str();
}

template <class CharT>
static std::basic_string<CharT> stream_fr_FR_locale(std::chrono::year_month_weekday_last ymwdl) {
  std::basic_stringstream<CharT> sstr;
  const std::locale locale(LOCALE_fr_FR_UTF_8);
  sstr.imbue(locale);
  sstr << ymwdl;
  return sstr.str();
}

template <class CharT>
static std::basic_string<CharT> stream_ja_JP_locale(std::chrono::year_month_weekday_last ymwdl) {
  std::basic_stringstream<CharT> sstr;
  const std::locale locale(LOCALE_ja_JP_UTF_8);
  sstr.imbue(locale);
  sstr << ymwdl;
  return sstr.str();
}

template <class CharT>
static void test() {
  assert(stream_c_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{-32'768}, std::chrono::month{1}, std::chrono::weekday_last{std::chrono::weekday{0}}}) ==
         SV("-32768 is not a valid year/Jan/Sun[last]"));
  assert(stream_c_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{-32'767}, std::chrono::month{0}, std::chrono::weekday_last{std::chrono::weekday{0}}}) ==
         SV("-32767/0 is not a valid month/Sun[last]"));
  assert(stream_c_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{-32'767}, std::chrono::month{1}, std::chrono::weekday_last{std::chrono::weekday{8}}}) ==
         SV("-32767/Jan/8 is not a valid weekday[last]"));
  assert(stream_c_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{-32'767}, std::chrono::month{1}, std::chrono::weekday_last{std::chrono::weekday{0}}}) ==
         SV("-32767/Jan/Sun[last]"));

  assert(stream_c_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{1970}, std::chrono::month{1}, std::chrono::weekday_last{std::chrono::weekday{0}}}) ==
         SV("1970/Jan/Sun[last]"));

#if defined(__APPLE__)
  assert(stream_fr_FR_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{-32'768}, std::chrono::month{1}, std::chrono::weekday_last{std::chrono::weekday{0}}}) ==
         SV("-32768 is not a valid year/jan/Dim[last]"));
  assert(stream_fr_FR_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{-32'767}, std::chrono::month{0}, std::chrono::weekday_last{std::chrono::weekday{0}}}) ==
         SV("-32767/0 is not a valid month/Dim[last]"));
  assert(stream_fr_FR_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{-32'767}, std::chrono::month{1}, std::chrono::weekday_last{std::chrono::weekday{8}}}) ==
         SV("-32767/jan/8 is not a valid weekday[last]"));
  assert(stream_fr_FR_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{-32'767}, std::chrono::month{1}, std::chrono::weekday_last{std::chrono::weekday{0}}}) ==
         SV("-32767/jan/Dim[last]"));

  assert(stream_fr_FR_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{1970}, std::chrono::month{1}, std::chrono::weekday_last{std::chrono::weekday{0}}}) ==
         SV("1970/jan/Dim[last]"));
#else  //  defined(__APPLE__)
  assert(stream_fr_FR_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{-32'768}, std::chrono::month{1}, std::chrono::weekday_last{std::chrono::weekday{0}}}) ==
         SV("-32768 is not a valid year/janv./dim.[last]"));
  assert(stream_fr_FR_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{-32'767}, std::chrono::month{0}, std::chrono::weekday_last{std::chrono::weekday{0}}}) ==
         SV("-32767/0 is not a valid month/dim.[last]"));
  assert(stream_fr_FR_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{-32'767}, std::chrono::month{1}, std::chrono::weekday_last{std::chrono::weekday{8}}}) ==
         SV("-32767/janv./8 is not a valid weekday[last]"));
  assert(stream_fr_FR_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{-32'767}, std::chrono::month{1}, std::chrono::weekday_last{std::chrono::weekday{0}}}) ==
         SV("-32767/janv./dim.[last]"));

  assert(stream_fr_FR_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{1970}, std::chrono::month{1}, std::chrono::weekday_last{std::chrono::weekday{0}}}) ==
         SV("1970/janv./dim.[last]"));
#endif //  defined(__APPLE__)

#if defined(__APPLE__)
  assert(stream_ja_JP_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{-32'768}, std::chrono::month{1}, std::chrono::weekday_last{std::chrono::weekday{0}}}) ==
         SV("-32768 is not a valid year/ 1/日[last]"));
  assert(stream_ja_JP_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{-32'767}, std::chrono::month{0}, std::chrono::weekday_last{std::chrono::weekday{0}}}) ==
         SV("-32767/0 is not a valid month/日[last]"));
  assert(stream_ja_JP_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{-32'767}, std::chrono::month{1}, std::chrono::weekday_last{std::chrono::weekday{8}}}) ==
         SV("-32767/ 1/8 is not a valid weekday[last]"));
  assert(stream_ja_JP_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{-32'767}, std::chrono::month{1}, std::chrono::weekday_last{std::chrono::weekday{0}}}) ==
         SV("-32767/ 1/日[last]"));

  assert(stream_ja_JP_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{1970}, std::chrono::month{1}, std::chrono::weekday_last{std::chrono::weekday{0}}}) ==
         SV("1970/ 1/日[last]"));
#else    // defined(__APPLE__)
#  if defined(_WIN32) || defined(_AIX)
  assert(stream_ja_JP_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{-32'768}, std::chrono::month{1}, std::chrono::weekday_last{std::chrono::weekday{0}}}) ==
         SV("-32768 is not a valid year/1月/日[last]"));
  assert(stream_ja_JP_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{-32'767}, std::chrono::month{0}, std::chrono::weekday_last{std::chrono::weekday{0}}}) ==
         SV("-32767/0 is not a valid month/日[last]"));
  assert(stream_ja_JP_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{-32'767}, std::chrono::month{1}, std::chrono::weekday_last{std::chrono::weekday{8}}}) ==
         SV("-32767/1月/8 is not a valid weekday[last]"));

  assert(stream_ja_JP_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{-32'767}, std::chrono::month{1}, std::chrono::weekday_last{std::chrono::weekday{0}}}) ==
         SV("-32767/1月/日[last]"));

  assert(stream_ja_JP_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{1970}, std::chrono::month{1}, std::chrono::weekday_last{std::chrono::weekday{0}}}) ==
         SV("1970/1月/日[last]"));
#  else  // defined(_WIN32) || defined(_AIX)
  assert(stream_ja_JP_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{-32'768}, std::chrono::month{1}, std::chrono::weekday_last{std::chrono::weekday{0}}}) ==
         SV("-32768 is not a valid year/ 1月/日[last]"));
  assert(stream_ja_JP_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{-32'767}, std::chrono::month{0}, std::chrono::weekday_last{std::chrono::weekday{0}}}) ==
         SV("-32767/0 is not a valid month/日[last]"));
  assert(stream_ja_JP_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{-32'767}, std::chrono::month{1}, std::chrono::weekday_last{std::chrono::weekday{8}}}) ==
         SV("-32767/ 1月/8 is not a valid weekday[last]"));
  assert(stream_ja_JP_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{-32'767}, std::chrono::month{1}, std::chrono::weekday_last{std::chrono::weekday{0}}}) ==
         SV("-32767/ 1月/日[last]"));

  assert(stream_ja_JP_locale<CharT>(std::chrono::year_month_weekday_last{
             std::chrono::year{1970}, std::chrono::month{1}, std::chrono::weekday_last{std::chrono::weekday{0}}}) ==
         SV("1970/ 1月/日[last]"));
#  endif // defined(_WIN32) || defined(_AIX)
#endif   // defined(__APPLE__)
}

int main(int, char**) {
  test<char>();

#ifndef TEST_HAS_NO_WIDE_CHARACTERS
  test<wchar_t>();
#endif

  return 0;
}