// Copyright (C) 2016 EDF
// All Rights Reserved
// This code is published under the GNU Lesser General Public License (GNU LGPL)
#ifndef DYNAMICPROGRAMMINGBYREGRESSIONVARYINGGRIDS_H
#define DYNAMICPROGRAMMINGBYREGRESSIONVARYINGGRIDS_H
#include <fstream>
#include <memory>
#include <functional>
#ifdef USE_MPI
#include <boost/mpi.hpp>
#endif
#include <Eigen/Dense>
#include "StOpt/core/grids/FullGrid.h"
#include "StOpt/dp/OptimizerDPBase.h"

/* \file DynamicProgrammingByRegressionVaryingGrids.h
 * \brief Defines a simple  program  showing how to optimize a problem by dynamic programming without parallel framework
 *        In this case, grids change depending on time
 *        A simple grid  is used
 * \author Xavier Warin
 */

/// \brief Principal function to optimize  a problem
///        The geometry of the  stocks is time dependent
/// \param p_timeChangeGrid    date for changing grids
/// \param p_grids             grids depending on time
/// \param p_optimize          optimizer defining the optimisation between two time steps
/// \param p_regressor         regressor object
/// \param p_funcFinalValue    function defining the final value
/// \param p_pointStock        point stock used for interpolation at initial date
/// \param p_initialRegime     regime at initial date
/// \param p_fileToDump        file to dump continuation values
/// \param p_world             MPI communicator
///
double  DynamicProgrammingByRegressionVaryingGrids(const std::vector<double>    &p_timeChangeGrid,
        const std::vector<std::shared_ptr<StOpt::FullGrid> >   &p_grids,
        const std::shared_ptr<StOpt::OptimizerDPBase > &p_optimize,
        const std::shared_ptr<StOpt::BaseRegression> &p_regressor,
        const std::function<double(const int &, const Eigen::ArrayXd &, const Eigen::ArrayXd &)>   &p_funcFinalValue,
        const Eigen::ArrayXd &p_pointStock,
        const int &p_initialRegime,
        const std::string   &p_fileToDump
#ifdef USE_MPI
        , const boost::mpi::communicator &p_world
#endif
                                                  );

#endif /* DYNAMICPROGRAMMINGBYREGRESSIONVARYINGGRIDS_H */
