#include "options.hpp"
#include <cassert>

int main()
{
    /* Skeleton.

    {
        std::array l{…};
        auto [opts, oper] = options::parse(std::cbegin(l), std::cend(l));

        assert((oper == options::Values{…}));
        assert((opts == options::Dictionary{
            {"option", {"value", …}},
            …
        }));
    }
    */

    /* Empty. */
    {
        std::array<const char*, 0> l{};
        auto [opts, oper] = options::parse(std::cbegin(l), std::cend(l));

        assert((oper == options::Values{}));
        assert((opts == options::Dictionary{}));
    }

    /* Operands. */
    {
        std::array l{"all", "these", "are", "operands"};
        auto [opts, oper] = options::parse(std::cbegin(l), std::cend(l));

        assert((oper == options::Values{"all", "these", "are", "operands"}));
        assert((opts == options::Dictionary{}));
    }

    /* Short Unix options. */
    {
        std::array l{"-a", "-b", "-c"};
        auto [opts, oper] = options::parse(std::cbegin(l), std::cend(l));

        assert((oper == options::Values{}));
        assert((opts == options::Dictionary{
            {"a", {}},
            {"b", {}},
            {"c", {}}
        }));
    }

    /* Short Unix options with arguments. */
    {
        std::array l{"-v", "value", "not-a-value", "-w", "-v", "other"};
        auto [opts, oper] = options::parse(std::cbegin(l), std::cend(l));

        assert((oper == options::Values{"not-a-value"}));
        assert((opts == options::Dictionary{
            {"v", {"value", "other"}},
            {"w", {}}
        }));
    }

    /* Short Unix options shorthand. */
    {
        std::array l{"-abcdef", "value", "not-a-value"};
        auto [opts, oper] = options::parse(std::cbegin(l), std::cend(l));

        assert((oper == options::Values{"not-a-value"}));
        assert((opts == options::Dictionary{
            {"a", {}},
            {"b", {}},
            {"c", {}},
            {"d", {}},
            {"e", {}},
            {"f", {"value"}}
        }));
    }

    /* Long GNU options. */
    {
        std::array l{"--long", "--option"};
        auto [opts, oper] = options::parse(std::cbegin(l), std::cend(l));

        assert((oper == options::Values{}));
        assert((opts == options::Dictionary{
            {"long", {}},
            {"option", {}}
        }));
    }

    /* Long GNU options with arguments separated by whitespace. */
    {
        std::array l{"--value", "v", "--value", "-v", "value", "--value"};
        auto [opts, oper] = options::parse(std::cbegin(l), std::cend(l));

        assert((oper == options::Values{}));
        assert((opts == options::Dictionary{
            {"v", {"value"}},
            {"value", {"v"}}
        }));
    }

    /* Long GNU options with arguments separated by equals sign. */
    {
        std::array l{"--value=-2", "--value=-1", "--value=0"};
        auto [opts, oper] = options::parse(std::cbegin(l), std::cend(l));

        assert((oper == options::Values{}));
        assert((opts == options::Dictionary{
            {"value", {"-2", "-1", "0"}}
        }));
    }

    /* Single dash as option-argument. */
    {
        std::array l{"--output", "-", "--input", "-", "-"};
        auto [opts, oper] = options::parse(std::cbegin(l), std::cend(l));

        assert((oper == options::Values{"-"}));
        assert((opts == options::Dictionary{
            {"output", {"-"}},
            {"input", {"-"}}
        }));
    }

    /* Long, short and shorthand options mixed. */
    {
        std::array l{"-abc", "content", "--long", "-short", "tree", "out"};
        auto [opts, oper] = options::parse(std::cbegin(l), std::cend(l));

        assert((oper == options::Values{"out"}));
        assert((opts == options::Dictionary{
            {"a", {}},
            {"b", {}},
            {"c", {"content"}},
            {"long", {}},
            {"s", {}},
            {"h", {}},
            {"o", {}},
            {"r", {}},
            {"t", {"tree"}}
        }));
    }

    /* Operand separator. */
    {
        std::array l{"--option", "--", "--not-option"};
        auto [opts, oper] = options::parse(std::cbegin(l), std::cend(l));

        assert((oper == options::Values{"--not-option"}));
        assert((opts == options::Dictionary{
            {"option", {}}
        }));
    }
}