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

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

Copyright(c) 2019 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
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions :

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
******************************************************************************/

#include "unit_test_framework.h"

#include "etl/array.h"
#include "etl/multi_array.h"

#include <array>
#include <algorithm>
#include <iterator>

#include "etl/integral_limits.h"

namespace
{
  SUITE(test_array)
  {
    static const size_t SIZE1 = 4UL;
    static const size_t SIZE2 = 3UL;

    using Data         = etl::multi_array<int, SIZE1, SIZE2>;
    using Compare_Data = std::array<std::array<int, SIZE2>, SIZE1>;

    Compare_Data compare_data = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };

    //*************************************************************************
    TEST(test_constructor)
    {
      Data data   = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };

      CHECK_EQUAL(data.size(),     SIZE1);
      CHECK_EQUAL(data.max_size(), SIZE1);

      CHECK_EQUAL(data[0].size(),     SIZE2);
      CHECK_EQUAL(data[0].max_size(), SIZE2);
    }

    //*************************************************************************
    TEST(test_assignment)
    {
      Data data = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };
      Data other_data;

      other_data = data;

      bool isEqual = std::equal(data.begin(), data.end(), other_data.begin());

      CHECK(isEqual);
    }

    //*************************************************************************
    TEST(test_at)
    {
      Data data = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };

      for (size_t i = 0UL; i < data.size(); ++i)
      {
        for (size_t j = 0UL; j < data[0].size(); ++j)
        {
          CHECK_EQUAL(data[i].at(j), compare_data[i].at(j));
        }
      }

      CHECK_THROW({ auto d = data.at(data.size()); (void)d; }, etl::array_out_of_range);
      CHECK_THROW({ auto d = data[0].at(data[0].size()); (void)d; }, etl::array_out_of_range);
    }

    //*************************************************************************
    TEST(test_at_const)
    {
      const Data data = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };

      for (size_t i = 0UL; i < data.size(); ++i)
      {
        for (size_t j = 0UL; j < data[0].size(); ++j)
        {
          CHECK_EQUAL(data[i].at(j), compare_data[i].at(j));
        }

        CHECK_THROW({ auto d = data.at(data.size()); (void)d; }, etl::array_out_of_range);
      }
    }

    //*************************************************************************
    TEST(test_index_operator)
    {
      Data data = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };

      for (size_t i = 0UL; i < data.size(); ++i)
      {
        for (size_t j = 0UL; j < data[0].size(); ++j)
        {
          CHECK_EQUAL(data[i][j], compare_data[i][j]);
        }
      }
    }

    //*************************************************************************
    TEST(test_index_operator_const)
    {
      const Data data = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };

      for (size_t i = 0UL; i < data.size(); ++i)
      {
        for (size_t j = 0UL; j < data[0].size(); ++j)
        {
          CHECK_EQUAL(data[i][j], compare_data[i][j]);
        }
      }
    }

    //*************************************************************************
    TEST(test_front)
    {
      Data data = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };

      int& ref = data.front().front();
      CHECK(ref == compare_data.front().front());
    }

    //*************************************************************************
    TEST(test_front_const)
    {
      const Data data = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };

      const int& ref = data.front().front();
      CHECK(ref == compare_data.front().front());
    }

    //*************************************************************************
    TEST(test_back)
    {
      Data data = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };

      int& ref = data.back().back();
      CHECK(ref == compare_data.back().back());
    }

    //*************************************************************************
    TEST(test_back_const)
    {
      const Data data = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };

      const int& ref = data.back().back();
      CHECK(ref == compare_data.back().back());
    }

    //*************************************************************************
    TEST(test_data)
    {
      Data data = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };

      bool isEqual = std::equal(data.begin(), data.end(), data.data());

      CHECK(isEqual);
    }

    //*************************************************************************
    TEST(test_data_const)
    {
      const Data data = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };

      bool isEqual = std::equal(data.begin(), data.end(), data.data());

      CHECK(isEqual);
    }

    //*************************************************************************
    TEST(test_begin)
    {
      Data data = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };

      CHECK(data.begin() == &data[0]);
      CHECK(data[0].begin() == &data[0][0]);
      CHECK(data[1].begin() == &data[1][0]);
      CHECK(data[2].begin() == &data[2][0]);
      CHECK(data[3].begin() == &data[3][0]);
    }

    //*************************************************************************
    TEST(test_end)
    {
      Data data = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };

      CHECK(data.end() == &data[0] + SIZE1);
      CHECK(data[0].end() == &data[0][0] + SIZE2);
      CHECK(data[1].end() == &data[1][0] + SIZE2);
      CHECK(data[2].end() == &data[2][0] + SIZE2);
      CHECK(data[3].end() == &data[3][0] + SIZE2);
    }

    //*************************************************************************
    TEST(test_cbegin)
    {
      const Data data = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };

      CHECK(data.cbegin() == &data[0]);
      CHECK(data[0].cbegin() == &data[0][0]);
      CHECK(data[1].cbegin() == &data[1][0]);
      CHECK(data[2].cbegin() == &data[2][0]);
      CHECK(data[3].cbegin() == &data[3][0]);
    }

    //*************************************************************************
    TEST(test_cend)
    {
      const Data data = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };

      CHECK(data.cend() == &data[0] + SIZE1);
      CHECK(data[0].cend() == &data[0][0] + SIZE2);
      CHECK(data[1].cend() == &data[1][0] + SIZE2);
      CHECK(data[2].cend() == &data[2][0] + SIZE2);
      CHECK(data[3].cend() == &data[3][0] + SIZE2);
    }

    //*************************************************************************
    TEST(test_rbegin)
    {
      Data data = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };

      typedef etl::multi_array<int, SIZE2> Inner;

      CHECK(data.rbegin() == Data::reverse_iterator(&data[0] + SIZE1));
      CHECK(data[0].rbegin() == Inner::reverse_iterator(&data[0][0] + SIZE2));
      CHECK(data[1].rbegin() == Inner::reverse_iterator(&data[1][0] + SIZE2));
      CHECK(data[2].rbegin() == Inner::reverse_iterator(&data[2][0] + SIZE2));
      CHECK(data[3].rbegin() == Inner::reverse_iterator(&data[3][0] + SIZE2));
    }

    //*************************************************************************
    TEST(test_rend)
    {
      Data data = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };

      typedef etl::multi_array<int, SIZE2> Inner;

      CHECK(data.rend() == Data::reverse_iterator(&data[0]));
      CHECK(data[0].rend() == Inner::reverse_iterator(&data[0][0]));
      CHECK(data[1].rend() == Inner::reverse_iterator(&data[1][0]));
      CHECK(data[2].rend() == Inner::reverse_iterator(&data[2][0]));
      CHECK(data[3].rend() == Inner::reverse_iterator(&data[3][0]));
    }

    //*************************************************************************
    TEST(test_crbegin)
    {
      const Data data = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };

      typedef etl::multi_array<int, SIZE2> Inner;

      CHECK(data.rbegin() == Data::const_reverse_iterator(data.data() + data.size()));
      CHECK(data[0].rbegin() == Inner::const_reverse_iterator(&data[0][0] + SIZE2));
      CHECK(data[1].rbegin() == Inner::const_reverse_iterator(&data[1][0] + SIZE2));
      CHECK(data[2].rbegin() == Inner::const_reverse_iterator(&data[2][0] + SIZE2));
      CHECK(data[3].rbegin() == Inner::const_reverse_iterator(&data[3][0] + SIZE2));
    }

    //*************************************************************************
    TEST(test_crend)
    {
      const Data data = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };

      typedef etl::multi_array<int, SIZE2> Inner;

      CHECK(data.rend() == Data::const_reverse_iterator(&data[0]));
      CHECK(data[0].rend() == Inner::const_reverse_iterator(&data[0][0]));
      CHECK(data[1].rend() == Inner::const_reverse_iterator(&data[1][0]));
      CHECK(data[2].rend() == Inner::const_reverse_iterator(&data[2][0]));
      CHECK(data[3].rend() == Inner::const_reverse_iterator(&data[3][0]));
    }

    //*************************************************************************
    TEST(test_empty)
    {
      Data data{};

      CHECK(!data.empty());
      CHECK(!data[0].empty());
    }

    //*************************************************************************
    TEST(test_size)
    {
      Data data;

      CHECK_EQUAL(SIZE1, data.size());
      CHECK_EQUAL(SIZE2, data[0].size());

      CHECK_EQUAL(SIZE1, data.SIZE);
      CHECK_EQUAL(SIZE2, data[0].SIZE);
    }

    //*************************************************************************
    TEST(test_max_size)
    {
      Data data;

      CHECK_EQUAL(SIZE1, data.max_size());
      CHECK_EQUAL(SIZE2, data[0].max_size());
    }

    //*************************************************************************
    TEST(test_fill)
    {
      Data data;
      typedef etl::multi_array<int, SIZE2> Inner;
      const Inner fillData = { { 12, 13, 14 } };

      data.fill(fillData);

      CHECK(fillData == data[0]);
      CHECK(fillData == data[1]);
      CHECK(fillData == data[2]);
      CHECK(fillData == data[3]);
    }

    //*************************************************************************
    TEST(test_swap)
    {
      Data data1 = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };
      Data data2 = { { { 12, 13, 14 }, { 15, 16, 17 }, { 18, 19, 20 }, { 21, 22, 23 } } };

      Data data1b = { { { 12, 13, 14 }, { 15, 16, 17 }, { 18, 19, 20 }, { 21, 22, 23 } } };
      Data data2b = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };

      using ETL_OR_STD::swap;
      swap(data1, data2);

      CHECK(std::equal(data1b.begin(), data1b.end(), data1.begin()));
      CHECK(std::equal(data2b.begin(), data2b.end(), data2.begin()));
    }

    //*************************************************************************
    TEST(test_assign)
    {
      Data initial = { { { -1, -1, -1 }, { -1, -1, -1 }, { -1, -1, -1 }, { -1, -1, -1 } } };
      Data source  = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };
      Data check1  = { { { 0, 1, 2 }, { 3, 4, 5 }, { -1, -1, -1 }, { -1, -1, -1 } } };
      Data check2  = { { { 0, 1, 2 }, { 3, 4, 5 }, { 99, 99, 99 }, { 99, 99, 99 } } };

      typedef etl::multi_array<int, SIZE2> Inner;
      const Inner ninetynine = { { 99, 99, 99 } };

      Data data;

      // Initial data.
      data.assign(std::begin(initial), std::end(initial));
      bool isEqual = std::equal(data.begin(), data.end(), std::begin(initial));
      CHECK(isEqual);

      // Assign smaller.
      data.assign(std::begin(initial), std::end(initial));
      data.assign(&source[0], &source[2]);
      isEqual = std::equal(data.begin(), data.end(), std::begin(check1));
      CHECK(isEqual);

      // Assign smaller + default.
      data.assign(std::begin(initial), std::end(initial));
      data.assign(&source[0], &source[2], ninetynine);
      isEqual = std::equal(data.begin(), data.end(), std::begin(check2));
      CHECK(isEqual);
    }

    //*************************************************************************
    TEST(test_insert_value)
    {
      Data initial = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };
      Data check1  = { { { 12, 13, 14 }, { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 } } };
      Data check2  = { { { 0, 1, 2 }, { 12, 13, 14 }, { 3, 4, 5 }, { 6, 7, 8 } } };
      Data check3  = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 12, 13, 14 } } };

      typedef etl::multi_array<int, SIZE2> Inner;
      const Inner inserted = { { 12, 13, 14 } };

      Data data;
      Data::iterator result;

      // Insert beginning.
      data.assign(std::begin(initial), std::end(initial));
      result = data.insert_at(0, inserted);
      CHECK(data[0] == *result);
      bool isEqual = std::equal(data.begin(), data.end(), check1.begin());
      CHECK(isEqual);

      // Insert middle.
      data.assign(std::begin(initial), std::end(initial));
      result = data.insert_at(1, inserted);
      CHECK(data[1] == *result);
      isEqual = std::equal(data.begin(), data.end(), check2.begin());
      CHECK(isEqual);

      // Insert end.
      data.assign(std::begin(initial), std::end(initial));
      result = data.insert_at(3, inserted);
      CHECK(data[3] == *result);
      isEqual = std::equal(data.begin(), data.end(), check3.begin());
      CHECK(isEqual);
    }

    //*************************************************************************
    TEST(test_equal)
    {
      Data data1 = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };
      Data data2 = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };

      CHECK(data1 == data2);
    }

    //*************************************************************************
    TEST(test_not_equal)
    {
      Data data1 = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };
      Data data2 = { { { 0, 1, 2 }, { 3, 4, 6 }, { 6, 7, 8 }, { 9, 10, 11 } } };

      CHECK(data1 != data2);
    }

    //*************************************************************************
    TEST(test_less_than)
    {
      Data data    = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };
      Data lesser  = { { { 0, 1, 2 }, { 3, 4, 4 }, { 6, 7, 8 }, { 9, 10, 11 } } };
      Data greater = { { { 0, 1, 2 }, { 3, 4, 6 }, { 6, 7, 8 }, { 9, 10, 11 } } };

      CHECK(lesser    < data);
      CHECK(!(data    < data));
      CHECK(!(greater < data));
    }

    //*************************************************************************
    TEST(test_less_than_equal)
    {
      Data data    = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };
      Data lesser  = { { { 0, 1, 2 }, { 3, 4, 4 }, { 6, 7, 8 }, { 9, 10, 11 } } };
      Data greater = { { { 0, 1, 2 }, { 3, 4, 6 }, { 6, 7, 8 }, { 9, 10, 11 } } };

      CHECK(lesser    <= data);
      CHECK(data      <= data);
      CHECK(!(greater <= data));
    }

    //*************************************************************************
    TEST(test_greater_than)
    {
      Data data    = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };
      Data lesser  = { { { 0, 1, 2 }, { 3, 4, 4 }, { 6, 7, 8 }, { 9, 10, 11 } } };
      Data greater = { { { 0, 1, 2 }, { 3, 4, 6 }, { 6, 7, 8 }, { 9, 10, 11 } } };

      CHECK(greater  > data);
      CHECK(!(data   > data));
      CHECK(!(lesser > data));
    }

    //*************************************************************************
    TEST(test_greater_than_equal)
    {
      Data data    = { { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 9, 10, 11 } } };
      Data lesser  = { { { 0, 1, 2 }, { 3, 4, 4 }, { 6, 7, 8 }, { 9, 10, 11 } } };
      Data greater = { { { 0, 1, 2 }, { 3, 4, 6 }, { 6, 7, 8 }, { 9, 10, 11 } } };

      CHECK(greater  >= data);
      CHECK(data     >= data);
      CHECK(!(lesser >= data));
    }
  };
}