/*
  Copyright 2015 Statoil ASA.

  This file is part of the Open Porous Media project (OPM).

  OPM 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.

  OPM 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 OPM.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef OPM_TABLE_CONTAINER_HPP
#define OPM_TABLE_CONTAINER_HPP

#include <cstddef>
#include <map>
#include <memory>

namespace Opm {

    class SimpleTable;

    class TableContainer {
        /*
          The TableContainer class implements a simple map:
          {tableNumber , Table}. The main functionality of the
          TableContainer class is that the getTable method implements
          the Eclipse behavior:

             If table N is not implemented - use table N - 1.

          The getTable() method will eventually throw an exception if
          not even table 0 is there.

          Consider the following code:

            TableContainer container(10);

            std::shared_ptr<TableType> table0 = std::make_shared<TableType>(...);
            container.addTable( table0 , 0 )

         We create a container with maximum 10 tables, and then we add
         one single table at slot 0; then we have:

            container.size()         == 1
            container.hasTable( 0 )  == true
            container.hasTable( 9 )  == false
            container.hasTable(10 )  == false

            container.getTable( 0 ) == container[9] == table0;
            container.gteTable(10 ) ==> exception
        */
    public:
        explicit TableContainer( size_t maxTables );
        bool empty() const;

        /*
          This is the number of actual tables in the container.
        */
        size_t size() const;
        void addTable(size_t tableNumber , std::shared_ptr<const SimpleTable> table);


        /*
          Observe that the hasTable() method does not invoke the "If
          table N is not implemented use table N - 1 behavior.
        */
        size_t hasTable(size_t tableNumber) const;
        const SimpleTable& getTable(size_t tableNumber) const;
        const SimpleTable& operator[](size_t tableNumber) const;

        template <class TableType>
        const TableType& getTable(size_t tableNumber) const {
            const SimpleTable &simpleTable = getTable( tableNumber );
            const TableType * table = static_cast<const TableType *>( &simpleTable );
            return *table;
        }

    private:
        size_t m_maxTables;
        std::map<size_t , std::shared_ptr<const SimpleTable> > m_tables;
    };

}


#endif