#include "cru/common/StringUtil.hpp"

#include <gtest/gtest.h>

using cru::k_invalid_code_point;

// TEST(WinString, Utf8Iterator) {
//   using cru::platform::win::Utf8Iterator;
//   std::string_view text = "aπ你🤣!";
//   Utf8Iterator i{text};
//   ASSERT_EQ(i.Next(), 0x0061);
//   ASSERT_EQ(i.Next(), 0x03C0);
//   ASSERT_EQ(i.Next(), 0x4F60);
//   ASSERT_EQ(i.Next(), 0x1F923);
//   ASSERT_EQ(i.Next(), 0x0021);
//   ASSERT_EQ(i.Next(), k_invalid_code_point);
// }

TEST(WinString, Utf16Iterator) {
  using cru::Utf16Iterator;
  std::u16string_view text = u"aπ你🤣!";
  Utf16Iterator i{text};
  ASSERT_EQ(i.Next(), 0x0061);
  ASSERT_EQ(i.Next(), 0x03C0);
  ASSERT_EQ(i.Next(), 0x4F60);
  ASSERT_EQ(i.Next(), 0x1F923);
  ASSERT_EQ(i.Next(), 0x0021);
  ASSERT_EQ(i.Next(), k_invalid_code_point);
  ASSERT_EQ(i.Previous(), 0x0021);
  ASSERT_EQ(i.Previous(), 0x1F923);
  ASSERT_EQ(i.Previous(), 0x4F60);
  ASSERT_EQ(i.Previous(), 0x03C0);
  ASSERT_EQ(i.Previous(), 0x0061);
  ASSERT_EQ(i.Previous(), k_invalid_code_point);
}

// TEST(WinString, IndexUtf8ToUtf16) {
//   using cru::platform::win::IndexUtf8ToUtf16;
//   std::string_view utf8_string = "aπ你🤣!";
//   std::wstring_view utf16_string = L"aπ你🤣!";
//   ASSERT_EQ(IndexUtf8ToUtf16(utf8_string, 0, utf16_string), 0);
//   ASSERT_EQ(IndexUtf8ToUtf16(utf8_string, 1, utf16_string), 1);
//   ASSERT_EQ(IndexUtf8ToUtf16(utf8_string, 3, utf16_string), 2);
//   ASSERT_EQ(IndexUtf8ToUtf16(utf8_string, 6, utf16_string), 3);
//   ASSERT_EQ(IndexUtf8ToUtf16(utf8_string, 10, utf16_string), 5);
//   ASSERT_EQ(IndexUtf8ToUtf16(utf8_string, 11, utf16_string), 6);
// }

// TEST(WinString, IndexUtf16ToUtf8) {
//   using cru::platform::win::IndexUtf16ToUtf8;
//   std::string_view utf8_string = "aπ你🤣!";
//   std::wstring_view utf16_string = L"aπ你🤣!";
//   ASSERT_EQ(IndexUtf16ToUtf8(utf16_string, 0, utf8_string), 0);
//   ASSERT_EQ(IndexUtf16ToUtf8(utf16_string, 1, utf8_string), 1);
//   ASSERT_EQ(IndexUtf16ToUtf8(utf16_string, 2, utf8_string), 3);
//   ASSERT_EQ(IndexUtf16ToUtf8(utf16_string, 3, utf8_string), 6);
//   ASSERT_EQ(IndexUtf16ToUtf8(utf16_string, 5, utf8_string), 10);
//   ASSERT_EQ(IndexUtf16ToUtf8(utf16_string, 6, utf8_string), 11);
// }