/**
 * @file tests/multithreading/lifegame/graph_manager.cpp
 * @author The ARTIS Development Team
 * See the AUTHORS or Authors.txt file
 */

/*
 * ARTIS - the multimodeling and simulation environment
 * This file is a part of the ARTIS environment
 *
 * Copyright (C) 2013-2022 ULCO http://www.univ-littoral.fr
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef TESTS_MULTITHREADING_LIFEGAME_GRAPH_MANAGER_HPP
#define TESTS_MULTITHREADING_LIFEGAME_GRAPH_MANAGER_HPP

#include <tests/multithreading/lifegame/models.hpp>

#include <artis-star/kernel/pdevs/multithreading/Coordinator.hpp>
#include <artis-star/kernel/pdevs/GraphManager.hpp>
#include <artis-star/kernel/pdevs/Simulator.hpp>

namespace artis {
namespace tests {
namespace multithreading {
namespace lifegame {

struct GridGraphManagerParameters {
  unsigned int begin_column;
  unsigned int end_column;
  unsigned int begin_line;
  unsigned int end_line;
  unsigned int min_column;
  unsigned int max_column;
  unsigned int min_line;
  unsigned int max_line;
};

class FlatGraphManager
  : public artis::pdevs::GraphManager<common::DoubleTime,
    CellParameters,
    GridGraphManagerParameters> {
public:
  enum submodels {
    CELL
  };

  FlatGraphManager(common::Coordinator<common::DoubleTime> *coordinator,
                   const CellParameters &parameters,
                   const GridGraphManagerParameters &graph_parameters)
    :
    artis::pdevs::GraphManager<common::DoubleTime, CellParameters, GridGraphManagerParameters>(
      coordinator, parameters, graph_parameters) {
    unsigned int column_number =
      graph_parameters.end_column - graph_parameters.begin_column + 1;
    unsigned int line_number =
      graph_parameters.end_line - graph_parameters.begin_line + 1;

    for (unsigned int i = graph_parameters.begin_column;
         i <= graph_parameters.end_column; ++i) {
      for (unsigned int j = graph_parameters.begin_line;
           j <= graph_parameters.end_line; ++j) {
        std::ostringstream ss;

        ss << "C_" << i << "_" << j;

        auto cell = new Simulator(ss.str(), parameters);

        _cells.push_back(cell);
        add_children(CELL, cell);
      }
    }
    for (int i = 0; i < (int) column_number; ++i) {
      for (int j = 0; j < (int) line_number; ++j) {
        int index = i * (int) line_number + j;

        // north
        if (j - 1 >= 0) {
          out({_cells[index], Cell::OUT})
            >> in({_cells[i * line_number + j - 1],
                   Cell::IN});
        }
        // south
        if (j + 1 < (int) line_number) {
          out({_cells[index], Cell::OUT})
            >> in({_cells[i * line_number + j + 1],
                   Cell::IN});
        }
        // west
        if (i - 1 >= 0) {
          out({_cells[index], Cell::OUT})
            >> in({_cells[(i - 1) * line_number
                          + j], Cell::IN});
        }
        // east
        if (i + 1 < (int) column_number) {
          out({_cells[index], Cell::OUT})
            >> in({_cells[(i + 1) * line_number
                          + j], Cell::IN});
        }
        // north west
        if (j - 1 >= 0 and i - 1 >= 0) {
          out({_cells[index], Cell::OUT})
            >> in({_cells[(i - 1) * line_number + j
                          - 1], Cell::IN});
        }
        // south west
        if (j + 1 < (int) line_number and i - 1 >= 0) {
          out({_cells[index], Cell::OUT})
            >> in({_cells[(i - 1) * line_number + j
                          + 1], Cell::IN});
        }
        // north east
        if (j - 1 >= 0 and i + 1 < (int) column_number) {
          out({_cells[index], Cell::OUT})
            >> in({_cells[(i + 1) * line_number + j
                          - 1], Cell::IN});
        }
        // south east
        if (j + 1 < (int) line_number and i + 1 < (int) column_number) {
          out({_cells[index], Cell::OUT})
            >> in({_cells[(i + 1) * line_number + j
                          + 1], Cell::IN});
        }
      }
    }
  }

  ~FlatGraphManager() override {
    std::for_each(_cells.begin(), _cells.end(),
                  std::default_delete<Simulator>());
  }

private:
  typedef pdevs::Simulator<common::DoubleTime, Cell, CellParameters> Simulator;
  typedef std::vector<Simulator *> Simulators;

  Simulators _cells;
};

class ParallelBuiltFlatGraphManager : public FlatGraphManager {
public:
  ParallelBuiltFlatGraphManager(
    common::Coordinator<common::DoubleTime> *coordinator,
    const CellParameters &parameters,
    const GridGraphManagerParameters &graph_parameters)
    :
    FlatGraphManager(coordinator, parameters, graph_parameters) {
    // inputs
    unsigned int k = 0;

    // top / bottom
    {
      int j_top = (int) graph_parameters.begin_line - 1;
      int j_bottom = (int) graph_parameters.end_line + 1;

      for (int i = (int) graph_parameters.begin_column - 1;
           i <= (int) graph_parameters.end_column + 1; ++i) {
        std::ostringstream ss_out;

        ++k;
        if (i >= (int) graph_parameters.min_column
            and i <= (int) graph_parameters.max_column
            and j_top >= (int) graph_parameters.min_line) {
          ss_out << "in_" << i << "_" << j_top;
          coordinator->add_in_port({k, ss_out.str()});
        }
        ++k;
        if (i >= (int) graph_parameters.min_column
            and i <= (int) graph_parameters.max_column
            and j_bottom <= (int) graph_parameters.max_line) {
          ss_out << "in_" << i << "_" << j_bottom;
          coordinator->add_in_port({k, ss_out.str()});
        }
      }
    }
    // left / right
    {
      int i_left = (int) graph_parameters.begin_column - 1;
      int i_right = (int) graph_parameters.end_column + 1;

      for (int j = (int) graph_parameters.begin_line;
           j <= (int) graph_parameters.end_line; ++j) {
        std::ostringstream ss_out;

        ++k;
        if (j >= (int) graph_parameters.min_line
            and j <= (int) graph_parameters.max_line
            and i_left >= (int) graph_parameters.min_column) {
          ss_out << "out_" << i_left << "_" << j;
          coordinator->add_in_port({k, ss_out.str()});
        }
        ++k;
        if (j >= (int) graph_parameters.min_line
            and j <= (int) graph_parameters.max_line
            and i_right >= (int) graph_parameters.max_column) {
          ss_out << "out_" << i_right << "_" << j;
          coordinator->add_in_port({k, ss_out.str()});
        }
      }
    }

    // outputs
    k = 0;

    // top / bottom
    {
      int j_top = (int) graph_parameters.begin_line;
      int j_bottom = (int) graph_parameters.end_line;

      for (int i = (int) graph_parameters.begin_column;
           i <= (int) graph_parameters.end_column; ++i) {
        std::ostringstream ss_out;

        ++k;
        ss_out << "out_" << i << "_" << j_top;
        coordinator->add_out_port({k, ss_out.str()});
        ++k;
        ss_out << "out_" << i << "_" << j_bottom;
        coordinator->add_out_port({k, ss_out.str()});
      }
    }
    // left / right
    {
      int i_left = (int) graph_parameters.begin_column;
      int i_right = (int) graph_parameters.end_column;

      for (int j = (int) graph_parameters.begin_line + 1;
           j <= (int) graph_parameters.end_line - 1; ++j) {
        std::ostringstream ss_out;

        ++k;
        ss_out << "out_" << i_left << "_" << j;
        coordinator->add_out_port({k, ss_out.str()});
        ++k;
        ss_out << "out_" << i_right << "_" << j;
        coordinator->add_out_port({k, ss_out.str()});
      }
    }


    //                        for (Edges::const_iterator it = parameters._output_edges.begin();
//                             it != parameters._output_edges.end(); ++it) {
//                            std::ostringstream ss_out;
//
//                            ss_out << "out_" << it->first;
//                            if (not coordinator->exist_out_port(ss_out.str())) {
//                                coordinator->add_out_port(ss_out.str());
//                            }
//                            if (not ParallelBuiltFlatGraphManager::exist_link(
//                                    ParallelBuiltFlatGraphManager::_simulators[it->first],
//                                    "out", coordinator, ss_out.str())) {
//                                ParallelBuiltFlatGraphManager::add_link(
//                                        ParallelBuiltFlatGraphManager::_simulators[it->first],
//                                        "out", coordinator, ss_out.str());
//                            }
//                        }
  }

  void init() {}

  void start(common::DoubleTime::type /* t */) {}

  void transition(
    const common::Models<common::DoubleTime> & /* receivers */,
    common::DoubleTime::type /* t */) {}

  ~ParallelBuiltFlatGraphManager() override = default;
};

class ParallelHierarchicalGraphManager :
  public artis::pdevs::GraphManager<common::DoubleTime,
    CellParameters, GridGraphManagerParameters> {

  typedef artis::pdevs::multithreading::Coordinator<
    common::DoubleTime,
    ParallelHierarchicalGraphManager,
    CellParameters,
    GridGraphManagerParameters> parent_coordinator_type;

public:
  enum submodels {
    S1_1 = 0, S1_2, S2_1, S2_2
  };

  ParallelHierarchicalGraphManager(
    common::Coordinator<common::DoubleTime> *coordinator,
    const CellParameters &parameters,
    const GridGraphManagerParameters &graph_parameters)
    :
    artis::pdevs::GraphManager<common::DoubleTime, CellParameters,
      GridGraphManagerParameters>(
      coordinator, parameters, graph_parameters) {
    // build coordinators (graphs)
    for (unsigned int i = 0; i < 2; ++i) {
      for (unsigned int j = 0; j < 2; ++j) {
        ParallelCoordinator *sub_coordinator = nullptr;
        std::ostringstream ss;

        ss << "S_" << (i + 1) << "_" << (j + 1);
        sub_coordinator = new ParallelCoordinator(ss.str(),
                                                  parameters,
                                                  {i * 5 + 1, (i + 1) * 5, j * 5 + 1, (j + 1) * 5,
                                                   1, 10, 1, 10});
        _coordinators.push_back(sub_coordinator);
        add_child(i, sub_coordinator);
      }
    }

    // builds internal connections (edges)
//                        for (Connections::const_iterator it = parent_connections.begin();
//                             it != parent_connections.end(); ++it) {
//                            const Connection& connection = *it;
//                            std::ostringstream ss_out;
//                            std::ostringstream ss_in;
//
//                            ss_out << "out_" << connection.first.second;
//                            ss_in << "in_" << connection.first.second;
//
//                            if (not exist_link(
//                                    _coordinators[connection.first.first - 1],
//                                    ss_out.str(),
//                                    _coordinators[connection.second.first - 1],
//                                    ss_in.str())) {
//                                add_link(
//                                        _coordinators[connection.first.first - 1],
//                                        ss_out.str(),
//                                        _coordinators[connection.second.first - 1],
//                                        ss_in.str());
//                            }
//                        }

  }

  ~ParallelHierarchicalGraphManager() override {
    for (typename Coordinators::const_iterator it = _coordinators.begin();
         it != _coordinators.end(); ++it) {
      delete *it;
    }
  }

  void init() {
    std::for_each(_coordinators.begin(), _coordinators.end(),
                  [this](ParallelCoordinator *coordinator) {
                    dynamic_cast< parent_coordinator_type *>(this->coordinator())
                      ->attach_child(coordinator, coordinator->get_queue());
                    coordinator->attach_parent(dynamic_cast< parent_coordinator_type *>(this->coordinator())->get_queue());
                  });
  }

private:
  typedef artis::pdevs::multithreading::Coordinator<
    common::DoubleTime,
    ParallelBuiltFlatGraphManager,
    CellParameters,
    GridGraphManagerParameters
  > ParallelCoordinator;
  typedef std::vector<ParallelCoordinator *> Coordinators;

  Coordinators _coordinators;
};

}
}
}
} // namespace artis tests multithreading lifegame

#endif