/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2011-2016 OpenFOAM Foundation
     \\/     M anipulation  |
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.

    OpenFOAM 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.

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

Application
    checkParticles

Description
    Utility for checking position of manually injected particles

\*---------------------------------------------------------------------------*/

#include "fvCFD.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

int main(int argc, char *argv[])
{
    argList::addOption
    (
        "cloud",
        "cloudPrefix",
        "cloudPrefix := { kinematic, reacting, ... }, default is reacting"
    );

    #include "setRootCase.H"
    #include "createTime.H"
    #include "createMesh.H"

    const word modExt ("valid");

    word cloudKind ("reacting");
    args.optionReadIfPresent("cloud", cloudKind);

    IOdictionary cloudProp
        (
         IOobject
         (
          cloudKind + "CloudProperties",
          runTime.constant(),
          mesh,
          IOobject::MUST_READ_IF_MODIFIED,
          IOobject::NO_WRITE
         )
        );

    dictionary injDict (cloudProp.subDict("subModels").subDict("injectionModels"));

    for (dictionary::iterator i = injDict.begin(); i != injDict.end(); ++i)
    {
        Info << "Checking " << (*i).name().name() << endl;

        Info << *i;

        word injectionType ((*i).dict().lookup("type"));

        if (injectionType == "manualInjection")
        {
            word posFileName ((*i).dict().lookup("positionsFile"));

            vectorIOField positions_
            (
                 IOobject
                 (
                  posFileName,
                  runTime.constant(),
                  mesh,
                  IOobject::MUST_READ,
                  IOobject::NO_WRITE
                 )
            );

            vectorIOField oldPositions
            (
                 IOobject
                 (
                  posFileName + ".old",
                  runTime.constant(),
                  mesh,
                  IOobject::NO_READ,
                  IOobject::NO_WRITE
                 ),
                 positions_
            );

            // Info << vectorIOField::subField(positions_, 10);

            labelList validIndices (positions_.size(), -1);
            label validCount = 0;

            forAll (positions_, pI)
            {
                label celli, tfi, tpi;
                point pos (positions_[pI]);
                mesh.findCellFacePt (pos, celli, tfi, tpi);

                if (celli < 0)
                {
                    Info << "Particle " << pI 
                        << " at " << pos << " not in the domain" 
                        << endl;
                }
                else
                {
                    validIndices[validCount] = pI;
                    validCount++;
                }
            }

            Info << (positions_.size() - validCount) << " particles are in bad position" << endl;

            if (validCount < positions_.size())
            {
                Info << "Update positions file " << posFileName << endl;

                vectorField newPositions_ (positions_, labelList::subList(validIndices, validCount));
                positions_.transfer(newPositions_);

                positions_.write();
                oldPositions.write();
            }
        }
    }

    Info<< "End\n" << endl;

    return 0;
}


// ************************************************************************* //