// The MIT License (MIT)
//
// Copyright (c) 2018 Mateusz Pusz
//
// 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.

#pragma once

#include <units/base_dimensions.h>
#include <units/time.h>

namespace units {

  struct dimension_frequency : make_dimension_t<exp<base_dim_time, -1>> {};
  template<> struct upcasting_traits<upcast_from<dimension_frequency>> : upcast_to<dimension_frequency> {};

  template<typename T>
  concept bool Frequency =  Quantity<T> && std::experimental::ranges::Same<typename T::dimension, dimension_frequency>;

  template<Unit U = struct hertz, Number Rep = double>
  using frequency = quantity<dimension_frequency, U, Rep>;

  struct millihertz : unit<dimension_frequency, std::milli> {};
  template<> struct upcasting_traits<upcast_from<millihertz>> : upcast_to<millihertz> {};

  struct hertz : derived_unit<dimension_frequency, second> {};
  template<> struct upcasting_traits<upcast_from<hertz>> : upcast_to<hertz> {};

  struct kilohertz : unit<dimension_frequency, std::kilo> {};
  template<> struct upcasting_traits<upcast_from<kilohertz>> : upcast_to<kilohertz> {};

  struct megahertz : unit<dimension_frequency, std::mega> {};
  template<> struct upcasting_traits<upcast_from<megahertz>> : upcast_to<megahertz> {};

  struct gigahertz : unit<dimension_frequency, std::giga> {};
  template<> struct upcasting_traits<upcast_from<gigahertz>> : upcast_to<gigahertz> {};

  struct terahertz : unit<dimension_frequency, std::tera> {};
  template<> struct upcasting_traits<upcast_from<terahertz>> : upcast_to<terahertz> {};

  inline namespace literals {

    // mHz
    constexpr auto operator""_mHz(unsigned long long l) { return frequency<millihertz, std::int64_t>(l); }
    constexpr auto operator""_mHz(long double l) { return frequency<millihertz, long double>(l); }

    // Hz
    constexpr auto operator""_Hz(unsigned long long l) { return frequency<hertz, std::int64_t>(l); }
    constexpr auto operator""_Hz(long double l) { return frequency<hertz, long double>(l); }

    // kHz
    constexpr auto operator""_kHz(unsigned long long l) { return frequency<kilohertz, std::int64_t>(l); }
    constexpr auto operator""_kHz(long double l) { return frequency<kilohertz, long double>(l); }

    // MHz
    constexpr auto operator""_MHz(unsigned long long l) { return frequency<megahertz, std::int64_t>(l); }
    constexpr auto operator""_MHz(long double l) { return frequency<megahertz, long double>(l); }

    // GHz
    constexpr auto operator""_GHz(unsigned long long l) { return frequency<gigahertz, std::int64_t>(l); }
    constexpr auto operator""_GHz(long double l) { return frequency<gigahertz, long double>(l); }

    // THz
    constexpr auto operator""_THz(unsigned long long l) { return frequency<terahertz, std::int64_t>(l); }
    constexpr auto operator""_THz(long double l) { return frequency<terahertz, long double>(l); }

  }  // namespace literals

}  // namespace units