// -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
// vi: set et ts=4 sw=2 sts=2:
#ifndef DUNE_CURVED_SURFACE_GRID_BACKUPRESTORE_HH
#define DUNE_CURVED_SURFACE_GRID_BACKUPRESTORE_HH

#include <dune/grid/common/backuprestore.hh>

#include <dune/curvedsurfacegrid/capabilities.hh>

namespace Dune
{
  namespace CGeo
  {

    // BackupRestoreFacilities
    // -----------------------

    template< class Grid, bool hasBackupRestoreFacilities = Capabilities::hasBackupRestoreFacilities<Grid> ::v >
    class BackupRestoreFacilities
    {};

    template< class Grid >
    class BackupRestoreFacilities<Grid, true>
    {
      using Self = BackupRestoreFacilities<Grid, true>;

    protected:
      BackupRestoreFacilities ()
      {}

    private:
      BackupRestoreFacilities (const Self&);
      Self& operator= (const Self&);

    protected:
      const Grid& asImp () const
      {
        return static_cast<const Grid&>(*this);
      }

      Grid& asImp ()
      {
        return static_cast<Grid&>(*this);
      }
    };

  } // namespace CGeo



  // BackupRestoreFacility for CurvedSurfaceGrid
  // -------------------------------------------

  template< class HostGrid, class CoordFunction, int order, class Allocator >
  struct BackupRestoreFacility<CurvedSurfaceGrid<HostGrid, CoordFunction, order, Allocator>>
  {
    using Grid = CurvedSurfaceGrid<HostGrid, CoordFunction, order, Allocator>;
    using HostBackupRestoreFacility = BackupRestoreFacility<HostGrid>;

    static void backup (const Grid& grid, const std::string& filename)
    {
      // notice: We should also backup the coordinate function
      HostBackupRestoreFacility::backup( grid.hostGrid(), filename );
    }

    static void backup (const Grid& grid, const std::ostream& stream)
    {
      // notice: We should also backup the coordinate function
      HostBackupRestoreFacility::backup(grid.hostGrid(), stream);
    }

    static Grid* restore (const std::string& filename)
    {
      // notice: We should also restore the coordinate function
      HostGrid* hostGrid = HostBackupRestoreFacility::restore(filename);
      CoordFunction* coordFunction = new CoordFunction();
      return new Grid(hostGrid, coordFunction);
    }

    static Grid* restore (const std::istream& stream)
    {
      HostGrid* hostGrid = HostBackupRestoreFacility::restore(stream);
      CoordFunction* coordFunction = new CoordFunction();
      return new Grid(hostGrid, coordFunction);
    }
  };

} // namespace Dune

#endif // DUNE_CURVED_SURFACE_GRID_BACKUPRESTORE_HH