/*
 * libfud
 * Copyright 2024 Dominick Allen
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef FUD_UNIQUE_ARRAY_HPP
#define FUD_UNIQUE_ARRAY_HPP

#include "array.hpp"
#include "fud_type_traits.hpp"

#include <cstdlib>
#include <utility>

namespace fud {

template <class T, T... Vs>
class UniqueArray { // NOLINT(cppcoreguidelines-special-member-functions)
  public:
    // NOLINTBEGIN(cppcoreguidelines-avoid-const-or-ref-data-members)
    const Array<T, sizeof...(Vs)> m_values{};
    // NOLINTEND(cppcoreguidelines-avoid-const-or-ref-data-members)

    ~UniqueArray() = default;

    constexpr UniqueArray() : m_values{{Vs...}}
    {
        static_assert(sizeof...(Vs) < 2 || !hasDuplicates<T, Vs...>());
    }

    constexpr UniqueArray(const UniqueArray& rhs) : m_values(rhs.m_values)
    {
        static_assert(sizeof...(Vs) < 2 || !hasDuplicates<T, Vs...>());
    }

    constexpr UniqueArray(UniqueArray&& rhs) noexcept : m_values(std::move(rhs).m_values)
    {
        static_assert(sizeof...(Vs) < 2 || !hasDuplicates<T, Vs...>());
    }

    [[nodiscard]] constexpr size_t size() const
    {
        return sizeof...(Vs);
    }
};

template <typename T=size_t, T... Is>
constexpr UniqueArray<T, Is...> makeStaticIndexSet(std::integer_sequence<T, Is...> /*unused*/)
{
    static_assert(sizeof...(Is) > 0);
    return UniqueArray<T, Is...>{};
}

} // namespace fud

#endif