/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/*

 Copyright (C) 2025 Hiroto Ogawa

 This file is part of QuantLib, a free-software/open-source library

 for financial quantitative analysts and developers - http://quantlib.org/

 QuantLib is free software: you can redistribute it and/or modify it

 under the terms of the QuantLib license.  You should have received a

 copy of the license along with this program; if not, please email

 <quantlib-dev@lists.sf.net>. The license is also available online at

 <https://www.quantlib.org/license.shtml>.

 This program is distributed in the hope that it will be useful, but WITHOUT

 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS

 FOR A PARTICULAR PURPOSE.  See the license for more details.

*/

#include <ql/instruments/perpetualfutures.hpp>

#include <ql/time/calendars/nullcalendar.hpp>

#include <utility>

namespace QuantLib {

    PerpetualFutures::PerpetualFutures(

        PerpetualFutures::PayoffType payoffType,

        PerpetualFutures::FundingType fundingType,

        Period fundingFrequency,

        Calendar cal,

        DayCounter dc) : payoffType_(payoffType), fundingType_(fundingType), fundingFrequency_(fundingFrequency),

        cal_(std::move(cal)), dc_(std::move(dc)) {

    }

Unexecuted instantiation: QuantLib::PerpetualFutures::PerpetualFutures(QuantLib::PerpetualFutures::PayoffType, QuantLib::PerpetualFutures::FundingType, QuantLib::Period, QuantLib::Calendar, QuantLib::DayCounter)

Unexecuted instantiation: QuantLib::PerpetualFutures::PerpetualFutures(QuantLib::PerpetualFutures::PayoffType, QuantLib::PerpetualFutures::FundingType, QuantLib::Period, QuantLib::Calendar, QuantLib::DayCounter)

    void PerpetualFutures::setupArguments(PricingEngine::arguments* args) const {

        auto* moreArgs = dynamic_cast<PerpetualFutures::arguments*>(args);

        QL_REQUIRE(moreArgs != nullptr, "wrong argument type");

        moreArgs->payoffType = payoffType_;

        moreArgs->fundingType = fundingType_;

        moreArgs->fundingFrequency = fundingFrequency_;

        moreArgs->cal = cal_;

        moreArgs->dc = dc_;

    }

    PerpetualFutures::arguments::arguments()

    : payoffType(PerpetualFutures::PayoffType(-1)), fundingType(PerpetualFutures::FundingType(-1)),

      fundingFrequency(Period(8, Hours)), cal(NullCalendar()),

      dc(ActualActual(ActualActual::ISDA)) {}

    void PerpetualFutures::arguments::validate() const {

        switch (payoffType) {

            case PerpetualFutures::Linear:

            case PerpetualFutures::Inverse:

            case PerpetualFutures::Quanto:

                break;

            default:

                QL_FAIL("unknown payoff type");

        }

        switch (fundingType) {

            case PerpetualFutures::FundingWithPreviousSpot:

                break;

            case PerpetualFutures::FundingWithCurrentSpot:

                break;

            default:

                QL_FAIL("unknown funding type");

        }

    }

    std::ostream& operator<<(std::ostream& out, PerpetualFutures::PayoffType type) {

        switch (type) {

            case PerpetualFutures::Linear:

                return out << "Linear";

            case PerpetualFutures::Inverse:

                return out << "Inverse";

            case PerpetualFutures::Quanto:

                return out << "Quanto";

            default:

                QL_FAIL("unknown PerpetualFutures::PayoffType(" << int(type) << ")");

        }

    }

    std::ostream& operator<<(std::ostream& out, PerpetualFutures::FundingType type) {

        switch (type) {

            case PerpetualFutures::FundingWithPreviousSpot:

                return out << "FundingWithPreviousSpot";

            case PerpetualFutures::FundingWithCurrentSpot:

                return out << "FundingWithCurrentSpot";

            default:

                QL_FAIL("unknown PerpetualFutures::FundingType(" << int(type) << ")");

        }

    }

}