/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 1991-2009 OpenCFD Ltd.
     \\/     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 2 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, write to the Free Software Foundation,
    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

Description
    Test new primitive patches.

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

#include "argList.H"
#include "Time.H"
#include "polyMesh.H"
#include "primitivePatch.H"
#include "faceIOList.H"
#include "IFstream.H"
#include "OFstream.H"

using namespace Foam;

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

typedef PrimitivePatch<face, List, const pointField&> myPrimitivePatch;


void writeObj(Ostream& os,const pointField& points)
{
    forAll(points, pointI)
    {
        const point& pt = points[pointI];

        os << "v " << pt.x() << ' ' << pt.y()
            << ' ' << pt.z() << endl;
    }
}


void checkFaceEdges
(
    const faceList& localFaces,
    const edgeList& edges,
    const labelListList& faceEdges
)
{
    forAll(faceEdges, faceI)
    {
        const face& f = localFaces[faceI];

        const labelList& myEdges = faceEdges[faceI];

        forAll(f, fp)
        {
            label fp1 = f.fcIndex(fp);

            if (edges[myEdges[fp]] != edge(f[fp], f[fp1]))
            {
                FatalErrorIn("checkFaceEdges")
                    << "Edges of face not in face point order:"
                    << "face:" << faceI << " localF:" << f
                    << " faceEdges:" << myEdges
                    << abort(FatalError);
            }
        }
    }
}


void writeEdges
(
    const pointField& localPoints,
    const edgeList& edges,
    const label nInternalEdges
)
{
    Info<< "Writing internal edges to internalEdges.obj" << nl << endl;

    OFstream intStream("internalEdges.obj");

    writeObj(intStream, localPoints);

    for (label edgeI = 0; edgeI < nInternalEdges; edgeI++)
    {
        const edge& e = edges[edgeI];

        intStream << "l " << e.start()+1 << ' ' << e.end()+1 << endl;
    }

    Info<< "Writing boundary edges to boundaryEdges.obj" << nl << endl;

    OFstream bndStream("boundaryEdges.obj");

    writeObj(bndStream, localPoints);

    for (label edgeI = nInternalEdges; edgeI < edges.size(); edgeI++)
    {
        const edge& e = edges[edgeI];

        bndStream << "l " << e.start()+1 << ' ' << e.end()+1 << endl;
    }
}


void writeFaceEdges
(
    const pointField& localPoints,
    const edgeList& edges,
    const labelListList& faceEdges
)
{
    Info<< "Writing faceEdges per face to faceEdges.obj" << nl << endl;

    OFstream feStream("faceEdges.obj");

    writeObj(feStream, localPoints);

    forAll(faceEdges, faceI)
    {
        const labelList& myEdges = faceEdges[faceI];

        forAll(myEdges, i)
        {
            const edge& e = edges[myEdges[i]];

            feStream<< "l " << e.start()+1 << ' ' << e.end()+1 << endl;
        }
    }
}


void writeEdgeFaces
(
    const pointField& localPoints,
    const faceList& localFaces,
    const edgeList& edges,
    const labelListList& edgeFaces
)
{
    Info<< "Writing edgeFaces per face to edgeFaces.obj" << nl << endl;

    OFstream efStream("edgeFaces.obj");

    pointField ctrs(localFaces.size(), vector::zero);

    forAll(localFaces, faceI)
    {
        ctrs[faceI] = localFaces[faceI].centre(localPoints);
    }
    writeObj(efStream, ctrs);


    forAll(edgeFaces, edgeI)
    {
        const labelList& myFaces = edgeFaces[edgeI];

        forAll(myFaces, i)
        {
            efStream<< "l " << myFaces[0]+1 << ' ' << myFaces[i]+1 << endl;
        }
    }
}


void writeFaceFaces
(
    const pointField& localPoints,
    const faceList& localFaces,
    const labelListList& faceFaces
)
{
    Info<< "Writing faceFaces per face to faceFaces.obj" << nl << endl;

    OFstream ffStream("faceFaces.obj");

    pointField ctrs(localFaces.size(), vector::zero);

    forAll(localFaces, faceI)
    {
        ctrs[faceI] = localFaces[faceI].centre(localPoints);
    }
    writeObj(ffStream, ctrs);

    forAll(faceFaces, faceI)
    {
        const labelList& nbrs = faceFaces[faceI];

        forAll(nbrs, nbI)
        {
            ffStream << "l " << faceI+1 << ' ' << nbrs[nbI]+1 << endl;
        }
    }
}


// Main program:

int main(int argc, char *argv[])
{
    argList::noParallel();
    argList::validArgs.append("patch");

#   include "setRootCase.H"
#   include "createTime.H"
#   include "createPolyMesh.H"

    word patchName(args.additionalArgs()[0]);

    label patchI = mesh.boundaryMesh().findPatchID(patchName);

    const polyPatch& patch = mesh.boundaryMesh()[patchI];

    Info<< "Patch:" << patch.name() << endl;

    PrimitivePatch<face, List, const pointField&> pp(patch, patch.points());

    const pointField& localPoints = pp.localPoints();
    const faceList& localFaces = pp.localFaces();
    const labelListList& faceFaces = pp.faceFaces();
    const edgeList& edges = pp.edges();
    const labelListList& edgeFaces = pp.edgeFaces();
    const labelListList& faceEdges = pp.faceEdges();


    checkFaceEdges(localFaces, edges, faceEdges);

    writeEdges(localPoints, edges, pp.nInternalEdges());

    writeFaceEdges(localPoints, edges, faceEdges);

    writeEdgeFaces(localPoints, localFaces, edges, edgeFaces);

    writeFaceFaces(localPoints, localFaces, faceFaces);

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

    return 0;
}


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