/******************************************************************************
The MIT License(MIT)

Embedded Template Library.
https://github.com/ETLCPP/etl
https://www.etlcpp.com

Copyright(c) 2025 John Wellbelove

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files(the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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******************************************************************************/

#include "unit_test_framework.h"

#include <string>
#include <array>
#include <algorithm>
#include <atomic>

#include "etl/const_wstring.h"
#include "etl/string_view.h"

#if ETL_USING_CPP14

#undef STR
#define STR(x) L##x

namespace
{
  SUITE(test_const_string_wchar_t)
  {
    using Text = etl::const_wstring;
    using View = etl::wstring_view;

    using TextSTD = std::wstring;

    static constexpr Text::const_pointer text_pointer = STR("Hello World");
    static constexpr Text                text(STR("Hello World"));
    static constexpr size_t              Length = etl::strlen(STR("Hello World"));

    //*************************************************************************
    template <typename T1, typename T2>
    bool Equal(const T1& compare_text, const T2& test_text)
    {
      return (compare_text.size() == test_text.size()) && std::equal(test_text.begin(), test_text.end(), compare_text.begin());
    }

    //*************************************************************************
    template <typename T1, typename T2>
    bool Equal(const T1* compare_text, const T2& test_text)
    {
      return (etl::strlen(compare_text) == test_text.size()) && std::equal(test_text.begin(), test_text.end(), compare_text);
    }

    //*************************************************************************
    TEST(test_constructor_null_string)
    {
      static constexpr Text text_from_literal_empty(STR(""));

      static constexpr auto text_empty = text_from_literal_empty.empty();
      CHECK_TRUE(text_empty);

      static constexpr auto text_full = text_from_literal_empty.full();
      CHECK_TRUE(text_full);

      static constexpr auto text_capacity = text_from_literal_empty.capacity();
      CHECK_EQUAL(0, text_capacity);

      static constexpr auto text_max_size = text_from_literal_empty.max_size();
      CHECK_EQUAL(0, text_max_size);

      static constexpr auto text_size = text_from_literal_empty.size();
      CHECK_EQUAL(0, text_size);

      static constexpr auto text_length = text_from_literal_empty.length();
      CHECK_EQUAL(0, text_length);

      static constexpr auto text_available = text_from_literal_empty.available();
      CHECK_EQUAL(0, text_available);

      static constexpr auto text_is_truncated = text_from_literal_empty.is_truncated();
      CHECK_FALSE(text_is_truncated);

      static constexpr auto text_is_secure = text_from_literal_empty.is_secure();
      CHECK_FALSE(text_is_secure);
    }

    //*************************************************************************
    TEST(test_constructor_char_pointer)
    {
      static constexpr Text text_from_pointer(text_pointer);

      static constexpr auto text_empty = text_from_pointer.empty();
      CHECK_FALSE(text_empty);

      static constexpr auto text_full = text_from_pointer.full();
      CHECK_TRUE(text_full);

      static constexpr auto text_capacity = text_from_pointer.capacity();
      CHECK_EQUAL(Length, text_capacity);

      static constexpr auto text_max_size = text_from_pointer.max_size();
      CHECK_EQUAL(Length, text_max_size);

      static constexpr auto text_size = text_from_pointer.size();
      CHECK_EQUAL(Length, text_size);

      static constexpr auto text_length = text_from_pointer.length();
      CHECK_EQUAL(Length, text_length);

      static constexpr auto text_available = text_from_pointer.available();
      CHECK_EQUAL(0, text_available);

      static constexpr auto text_is_truncated = text_from_pointer.is_truncated();
      CHECK_FALSE(text_is_truncated);

      static constexpr auto text_is_secure = text_from_pointer.is_secure();
      CHECK_FALSE(text_is_secure);

      static constexpr Text::const_pointer text_data = text_from_pointer.data();
      CHECK_EQUAL(&text_pointer[0], text_data);

      static constexpr Text::const_pointer text_data_end = text_from_pointer.data_end();
      CHECK_EQUAL(&text_pointer[Length], text_data_end);

      static constexpr auto text_begin = text_from_pointer.begin();
      CHECK_EQUAL(&text_pointer[0], text_begin);

      static constexpr auto text_cbegin = text_from_pointer.cbegin();
      CHECK_EQUAL(&text_pointer[0], text_cbegin);

      static constexpr auto text_rbegin = text_from_pointer.rbegin();
      CHECK_EQUAL(&text_pointer[Length - 1], etl::addressof(*text_rbegin));

      static constexpr auto text_crbegin = text_from_pointer.crbegin();
      CHECK_EQUAL(&text_pointer[Length - 1], etl::addressof(*text_crbegin));

      static constexpr auto text_end = text_from_pointer.end();
      CHECK_EQUAL(&text_pointer[Length], text_end);

      static constexpr auto text_cend = text_from_pointer.cend();
      CHECK_EQUAL(&text_pointer[Length], text_cend);

      static constexpr auto text_rend = text_from_pointer.rend();
      CHECK_EQUAL(&text_pointer[0] - 1, etl::addressof(*text_rend));

      static constexpr auto text_crend = text_from_pointer.crend();
      CHECK_EQUAL(&text_pointer[0] - 1, etl::addressof(*text_crend));

      bool is_equal = Equal(std::wstring(text_pointer), text);
      CHECK(is_equal);
    }

    //*************************************************************************
    TEST(test_constructor_from_literal)
    {
      static constexpr Text text_from_literal(STR("Hello World"));

      static constexpr auto text_empty = text_from_literal.empty();
      CHECK_FALSE(text_empty);

      static constexpr auto text_full = text_from_literal.full();
      CHECK_TRUE(text_full);

      static constexpr auto text_capacity = text_from_literal.capacity();
      CHECK_EQUAL(Length, text_capacity);

      static constexpr auto text_max_size = text_from_literal.max_size();
      CHECK_EQUAL(Length, text_max_size);

      static constexpr auto text_size = text_from_literal.size();
      CHECK_EQUAL(Length, text_size);

      static constexpr auto text_length = text_from_literal.length();
      CHECK_EQUAL(Length, text_length);

      static constexpr auto text_available = text_from_literal.available();
      CHECK_EQUAL(0, text_available);

      static constexpr auto text_is_truncated = text_from_literal.is_truncated();
      CHECK_FALSE(text_is_truncated);

      static constexpr auto text_is_secure = text_from_literal.is_secure();
      CHECK_FALSE(text_is_secure);

      static constexpr Text::const_pointer text_data = text_from_literal.data();
      CHECK_EQUAL(&text_pointer[0], text_data);

      static constexpr Text::const_pointer text_data_end = text_from_literal.data_end();
      CHECK_EQUAL(&text_pointer[Length], text_data_end);

      static constexpr auto text_begin = text_from_literal.begin();
      CHECK_EQUAL(&text_pointer[0], text_begin);

      static constexpr auto text_cbegin = text_from_literal.cbegin();
      CHECK_EQUAL(&text_pointer[0], text_cbegin);

      static constexpr auto text_rbegin = text_from_literal.rbegin();
      CHECK_EQUAL(&text_pointer[Length - 1], etl::addressof(*text_rbegin));

      static constexpr auto text_crbegin = text_from_literal.crbegin();
      CHECK_EQUAL(&text_pointer[Length - 1], etl::addressof(*text_crbegin));

      static constexpr auto text_end = text_from_literal.end();
      CHECK_EQUAL(&text_pointer[Length], text_end);

      static constexpr auto text_cend = text_from_literal.cend();
      CHECK_EQUAL(&text_pointer[Length], text_cend);

      static constexpr auto text_rend = text_from_literal.rend();
      CHECK_EQUAL(&text_pointer[0] - 1, etl::addressof(*text_rend));

      static constexpr auto text_crend = text_from_literal.crend();
      CHECK_EQUAL(&text_pointer[0] - 1, etl::addressof(*text_crend));

      bool is_equal = Equal(std::wstring(text_pointer), text);
      CHECK(is_equal);
    }

    //*************************************************************************
    TEST(test_constructor_truncated)
    {
      static constexpr Text text_from_pointer(text_pointer, true);
      static constexpr Text text_from_literal(STR("Hello World"), true);

      static constexpr auto text_from_pointer_is_truncated = text_from_pointer.is_truncated();
      CHECK_TRUE(text_from_pointer_is_truncated);

      static constexpr auto text_from_literal_is_truncated = text_from_literal.is_truncated();
      CHECK_TRUE(text_from_literal_is_truncated);
    }

    //*************************************************************************
    TEST(test_copy_constructor)
    {
      static constexpr Text text_copy(text);

      static constexpr auto text_empty = text_copy.empty();
      CHECK_FALSE(text_empty);

      static constexpr auto text_full = text_copy.full();
      CHECK_TRUE(text_full);

      static constexpr auto text_capacity = text_copy.capacity();
      CHECK_EQUAL(Length, text_capacity);

      static constexpr auto text_max_size = text_copy.max_size();
      CHECK_EQUAL(Length, text_max_size);

      static constexpr auto text_size = text_copy.size();
      CHECK_EQUAL(Length, text_size);

      static constexpr auto text_length = text_copy.length();
      CHECK_EQUAL(Length, text_length);

      static constexpr auto text_available = text_copy.available();
      CHECK_EQUAL(0, text_available);

      static constexpr auto text_is_truncated = text_copy.is_truncated();
      CHECK_FALSE(text_is_truncated);

      static constexpr auto text_is_secure = text_copy.is_secure();
      CHECK_FALSE(text_is_secure);

      static constexpr Text::const_pointer text_data = text_copy.data();
      CHECK_EQUAL(&text_pointer[0], text_data);

      static constexpr Text::const_pointer text_data_end = text_copy.data_end();
      CHECK_EQUAL(&text_pointer[Length], text_data_end);

      static constexpr auto text_begin = text_copy.begin();
      CHECK_EQUAL(&text_pointer[0], text_begin);

      static constexpr auto text_cbegin = text_copy.cbegin();
      CHECK_EQUAL(&text_pointer[0], text_cbegin);

      static constexpr auto text_rbegin = text_copy.rbegin();
      CHECK_EQUAL(&text_pointer[Length - 1], etl::addressof(*text_rbegin));

      static constexpr auto text_crbegin = text_copy.crbegin();
      CHECK_EQUAL(&text_pointer[Length - 1], etl::addressof(*text_crbegin));

      static constexpr auto text_end = text_copy.end();
      CHECK_EQUAL(&text_pointer[Length], text_end);

      static constexpr auto text_cend = text_copy.cend();
      CHECK_EQUAL(&text_pointer[Length], text_cend);

      static constexpr auto text_rend = text_copy.rend();
      CHECK_EQUAL(&text_pointer[0] - 1, etl::addressof(*text_rend));
       
      static constexpr auto text_crend = text_copy.crend();
      CHECK_EQUAL(&text_pointer[0] - 1, etl::addressof(*text_crend));

      bool is_equal = Equal(std::wstring(text_pointer), text);
      CHECK(is_equal);
    }

    //*************************************************************************
    TEST(test_copy_constructor_from_truncated)
    {
      static constexpr Text text_original(STR("Hello World"), true);
      static constexpr Text text_copy(text_original);

      static constexpr auto text_empty = text_copy.empty();
      CHECK_FALSE(text_empty);

      static constexpr auto text_full = text_copy.full();
      CHECK_TRUE(text_full);

      static constexpr auto text_capacity = text_copy.capacity();
      CHECK_EQUAL(Length, text_capacity);

      static constexpr auto text_max_size = text_copy.max_size();
      CHECK_EQUAL(Length, text_max_size);

      static constexpr auto text_size = text_copy.size();
      CHECK_EQUAL(Length, text_size);

      static constexpr auto text_length = text_copy.length();
      CHECK_EQUAL(Length, text_length);

      static constexpr auto text_available = text_copy.available();
      CHECK_EQUAL(0, text_available);

      static constexpr auto text_is_truncated = text_copy.is_truncated();
      CHECK_TRUE(text_is_truncated);

      static constexpr auto text_is_secure = text_copy.is_secure();
      CHECK_FALSE(text_is_secure);

      static constexpr Text::const_pointer text_data = text_copy.data();
      CHECK_EQUAL(&text_pointer[0], text_data);

      static constexpr Text::const_pointer text_data_end = text_copy.data_end();
      CHECK_EQUAL(&text_pointer[Length], text_data_end);

      static constexpr auto text_begin = text_copy.begin();
      CHECK_EQUAL(&text_pointer[0], text_begin);

      static constexpr auto text_cbegin = text_copy.cbegin();
      CHECK_EQUAL(&text_pointer[0], text_cbegin);

      static constexpr auto text_rbegin = text_copy.rbegin();
      CHECK_EQUAL(&text_pointer[Length - 1], etl::addressof(*text_rbegin));

      static constexpr auto text_crbegin = text_copy.crbegin();
      CHECK_EQUAL(&text_pointer[Length - 1], etl::addressof(*text_crbegin));

      static constexpr auto text_end = text_copy.end();
      CHECK_EQUAL(&text_pointer[Length], text_end);

      static constexpr auto text_cend = text_copy.cend();
      CHECK_EQUAL(&text_pointer[Length], text_cend);

      static constexpr auto text_rend = text_copy.rend();
      CHECK_EQUAL(&text_pointer[0] - 1, etl::addressof(*text_rend));

      static constexpr auto text_crend = text_copy.crend();
      CHECK_EQUAL(&text_pointer[0] - 1, etl::addressof(*text_crend));

      bool is_equal = Equal(std::wstring(text_pointer), text);
      CHECK(is_equal);
    }

    //*************************************************************************
    TEST(test_begin)
    {
      static constexpr Text::const_iterator p_begin  = text.begin();
      static constexpr Text::const_iterator p_cbegin = text.cbegin();

      CHECK_EQUAL(&text_pointer[0], p_begin);
      CHECK_EQUAL(&text_pointer[0], p_cbegin);
    }
 
    //*************************************************************************
    TEST(test_index)
    {
      static constexpr Text::value_type c0  = text[0];
      static constexpr Text::value_type c1  = text[1];
      static constexpr Text::value_type c2  = text[2];
      static constexpr Text::value_type c3  = text[3];
      static constexpr Text::value_type c4  = text[4];
      static constexpr Text::value_type c5  = text[5];
      static constexpr Text::value_type c6  = text[6];
      static constexpr Text::value_type c7  = text[7];
      static constexpr Text::value_type c8  = text[8];
      static constexpr Text::value_type c9  = text[9];
      static constexpr Text::value_type c10 = text[10];
      static constexpr Text::value_type c11 = text[11];

      CHECK_EQUAL(text_pointer[0],  c0);
      CHECK_EQUAL(text_pointer[1],  c1);
      CHECK_EQUAL(text_pointer[2],  c2);
      CHECK_EQUAL(text_pointer[3],  c3);
      CHECK_EQUAL(text_pointer[4],  c4);
      CHECK_EQUAL(text_pointer[5],  c5);
      CHECK_EQUAL(text_pointer[6],  c6);
      CHECK_EQUAL(text_pointer[7],  c7);
      CHECK_EQUAL(text_pointer[8],  c8);
      CHECK_EQUAL(text_pointer[9],  c9);
      CHECK_EQUAL(text_pointer[10], c10);
      CHECK_EQUAL(text_pointer[11], c11);
    }

    //*************************************************************************
    TEST(test_at)
    {
      static constexpr Text::value_type c0  = text.at(0);
      static constexpr Text::value_type c1  = text.at(1);
      static constexpr Text::value_type c2  = text.at(2);
      static constexpr Text::value_type c3  = text.at(3);
      static constexpr Text::value_type c4  = text.at(4);
      static constexpr Text::value_type c5  = text.at(5);
      static constexpr Text::value_type c6  = text.at(6);
      static constexpr Text::value_type c7  = text.at(7);
      static constexpr Text::value_type c8  = text.at(8);
      static constexpr Text::value_type c9  = text.at(9);
      static constexpr Text::value_type c10 = text.at(10);

      CHECK_EQUAL(text_pointer[0],  c0);
      CHECK_EQUAL(text_pointer[1],  c1);
      CHECK_EQUAL(text_pointer[2],  c2);
      CHECK_EQUAL(text_pointer[3],  c3);
      CHECK_EQUAL(text_pointer[4],  c4);
      CHECK_EQUAL(text_pointer[5],  c5);
      CHECK_EQUAL(text_pointer[6],  c6);
      CHECK_EQUAL(text_pointer[7],  c7);
      CHECK_EQUAL(text_pointer[8],  c8);
      CHECK_EQUAL(text_pointer[9],  c9);
      CHECK_EQUAL(text_pointer[10], c10);
    }

    //*************************************************************************
    TEST(test_front)
    {
      CHECK_TRUE(text_pointer[0] == text.front());
    }

    //*************************************************************************
    TEST(test_back)
    {
      CHECK_TRUE(text_pointer[Length - 1] == text.back());
    }

    //*************************************************************************
    TEST(test_data)
    {
      static constexpr Text::const_pointer p_data = text.data();

      CHECK_EQUAL(&text[0], p_data);
    }

    //*************************************************************************
    TEST(test_data_end)
    {
      static constexpr Text::const_pointer p_data = text.data_end();

      CHECK_EQUAL(&text[Length], p_data);
    }

    //*************************************************************************
    TEST(test_c_str)
    {
      static constexpr Text::const_pointer p_data = text.c_str();

      CHECK_EQUAL(&text[0], p_data);
      CHECK_EQUAL(Length, etl::strlen(p_data));
    }

    //*************************************************************************
    TEST(test_const_iterator)
    {
      static constexpr Text::const_iterator itr = text.begin();

      Text::const_iterator begin = text.begin();
      Text::const_iterator end   = text.end();

      bool is_equal = std::equal(begin, end, itr);
      CHECK_TRUE(is_equal);
    }

    //*************************************************************************
    TEST(test_const_reverse_iterator)
    {
      static constexpr Text::const_reverse_iterator ritr = text.rbegin();

      etl::reverse_iterator<Text::const_pointer> rbegin(text_pointer + Length);
      etl::reverse_iterator<Text::const_pointer> rend(text_pointer);

      bool is_equal = std::equal(rbegin, rend, ritr);
      CHECK_TRUE(is_equal);
    }

    //*************************************************************************
    TEST(test_to_view)
    {
      static constexpr View view(text);

      CHECK_TRUE(text.begin() == view.begin());
      CHECK_TRUE(text.end()   == view.end());

      bool is_equal = std::equal(text.begin(), text.end(), view.begin());
      CHECK_TRUE(is_equal);
    }

    //*************************************************************************
#if ETL_USING_STL
    TEST(test_write_string_to_std_basic_ostream)
    {
      Text text1(STR("Hello World"));

      std::wstringstream sstream;

      sstream << text1;

      TextSTD sstream_string = sstream.str();

      View sstream_view(sstream_string.data(), sstream_string.size());

      CHECK(text1 == sstream_view);
    }
#endif
  };
}

#endif