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

/*
Copyright (C) 2009 Mark Joshi

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.
*/


#ifndef quantlib_market_model_pathwise_call_specified_hpp
#define quantlib_market_model_pathwise_call_specified_hpp

#include <ql/methods/montecarlo/exercisestrategy.hpp>
#include <ql/models/marketmodels/curvestates/lmmcurvestate.hpp>
#include <ql/models/marketmodels/evolutiondescription.hpp>
#include <ql/models/marketmodels/pathwisemultiproduct.hpp>
#include <ql/types.hpp>
#include <ql/utilities/clone.hpp>
#include <memory>
#include <valarray>
#include <vector>

namespace QuantLib
{
    class curveState;


    class CallSpecifiedPathwiseMultiProduct : public MarketModelPathwiseMultiProduct
    {
    public:
      CallSpecifiedPathwiseMultiProduct(
          const Clone<MarketModelPathwiseMultiProduct>& underlying,
          const Clone<ExerciseStrategy<CurveState> >&,
          Clone<MarketModelPathwiseMultiProduct> rebate = Clone<MarketModelPathwiseMultiProduct>());
      //! \name MarketModelPathwiseMultiProduct interface
      //@{
      std::vector<Size> suggestedNumeraires() const override;
      const EvolutionDescription& evolution() const override;
      std::vector<Time> possibleCashFlowTimes() const override;
      Size numberOfProducts() const override;
      Size maxNumberOfCashFlowsPerProductPerStep() const override;
      void reset() override;
      bool nextTimeStep(const CurveState& currentState,
                        std::vector<Size>& numberCashFlowsThisStep,
                        std::vector<std::vector<MarketModelPathwiseMultiProduct::CashFlow> >&
                            cashFlowsGenerated) override;

        std::unique_ptr<MarketModelPathwiseMultiProduct> clone() const override;

        bool alreadyDeflated() const override;
        //@}
        const MarketModelPathwiseMultiProduct& underlying() const;
        const ExerciseStrategy<CurveState>& strategy() const;
        const MarketModelPathwiseMultiProduct& rebate() const;
        void enableCallability();
        void disableCallability();
              

    private:
        Clone<MarketModelPathwiseMultiProduct> underlying_;
        Clone<ExerciseStrategy<CurveState> > strategy_;
        Clone<MarketModelPathwiseMultiProduct> rebate_;
        EvolutionDescription evolution_;
        std::vector<std::valarray<bool> > isPresent_;
        std::vector<Time> cashFlowTimes_;
        Size rebateOffset_ = 0UL;
        bool wasCalled_ = false;
        std::vector<Size> dummyCashFlowsThisStep_;
        std::vector<std::vector<CashFlow> > dummyCashFlowsGenerated_;
        Size currentIndex_ = 0UL;
        bool callable_ = true;
    };

}

#endif
