#include "queen_attack.h"
#define BOOST_TEST_MAIN
#include <boost/test/unit_test.hpp>
#include "require_equal_containers.h"

BOOST_AUTO_TEST_CASE(queens_in_default_positions)
{
    const queen_attack::chess_board board;

    BOOST_REQUIRE_EQUAL(std::make_pair(0, 3), board.white());
    BOOST_REQUIRE_EQUAL(std::make_pair(7, 3), board.black());
}

#if defined(EXERCISM_RUN_ALL_TESTS)
BOOST_AUTO_TEST_CASE(initialized_with_specific_positions)
{
    const auto white = std::make_pair(3, 7);
    const auto black = std::make_pair(6, 1);
    const queen_attack::chess_board board{white, black};

    BOOST_REQUIRE_EQUAL(white, board.white());
    BOOST_REQUIRE_EQUAL(black, board.black());
}

BOOST_AUTO_TEST_CASE(queen_positions_must_be_distinct)
{
    const auto pos = std::make_pair(3, 7);
    BOOST_REQUIRE_THROW((queen_attack::chess_board{pos, pos}), std::domain_error);
}

BOOST_AUTO_TEST_CASE(string_representation)
{
    const queen_attack::chess_board board{std::make_pair(2, 4), std::make_pair(6, 6)};

    const std::string expected{
        "_ _ _ _ _ _ _ _\n"
        "_ _ _ _ _ _ _ _\n"
        "_ _ _ _ W _ _ _\n"
        "_ _ _ _ _ _ _ _\n"
        "_ _ _ _ _ _ _ _\n"
        "_ _ _ _ _ _ _ _\n"
        "_ _ _ _ _ _ B _\n"
        "_ _ _ _ _ _ _ _\n"};
    BOOST_REQUIRE_EQUAL(expected, static_cast<std::string>(board));
}

BOOST_AUTO_TEST_CASE(queens_cannot_attack)
{
    const queen_attack::chess_board board{std::make_pair(2, 3), std::make_pair(4, 7)};

    BOOST_REQUIRE(!board.can_attack());
}

BOOST_AUTO_TEST_CASE(queens_can_attack_when_they_are_on_the_same_row)
{
    const queen_attack::chess_board board{std::make_pair(2, 4), std::make_pair(2, 7)};

    BOOST_REQUIRE(board.can_attack());
}

BOOST_AUTO_TEST_CASE(queens_can_attack_when_they_are_on_the_same_column)
{
    const queen_attack::chess_board board{std::make_pair(5, 4), std::make_pair(2, 4)};

    BOOST_REQUIRE(board.can_attack());
}

BOOST_AUTO_TEST_CASE(queens_can_attack_diagonally)
{
    const queen_attack::chess_board board{std::make_pair(1, 1), std::make_pair(6, 6)};

    BOOST_REQUIRE(board.can_attack());
}

BOOST_AUTO_TEST_CASE(queens_can_attack_another_diagonally)
{
    const queen_attack::chess_board board{std::make_pair(0, 6), std::make_pair(1, 7)};

    BOOST_REQUIRE(board.can_attack());
}

BOOST_AUTO_TEST_CASE(queens_can_attack_yet_another_diagonally)
{
    const queen_attack::chess_board board{std::make_pair(4, 1), std::make_pair(6, 3)};

    BOOST_REQUIRE(board.can_attack());
}

BOOST_AUTO_TEST_CASE(queens_can_attack_on_the_nw_so_diagonal)
{
    const queen_attack::chess_board board{std::make_pair(1, 6), std::make_pair(6, 1)};

    BOOST_REQUIRE(board.can_attack());
}

BOOST_AUTO_TEST_CASE(queens_cannot_attack_if_not_on_same_row_column_or_diagonal)
{
    const queen_attack::chess_board board{std::make_pair(1, 1), std::make_pair(3, 7)};

    BOOST_REQUIRE(!board.can_attack());
}
#endif