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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Copyright (C) 2011-2023 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/>.
\*---------------------------------------------------------------------------*/

#include "primitiveMesh.H"
#include "demandDrivenData.H"

// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //

namespace Foam
{
    defineTypeNameAndDebug(primitiveMesh, 0);
}


// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //

Foam::primitiveMesh::primitiveMesh()
:
    nInternalPoints_(0),    // note: points are considered ordered on empty mesh
    nPoints_(0),
    nInternal0Edges_(-1),
    nInternal1Edges_(-1),
    nInternalEdges_(-1),
    nEdges_(-1),
    nInternalFaces_(0),
    nFaces_(0),
    nCells_(0),

    cellShapesPtr_(nullptr),
    edgesPtr_(nullptr),
    ccPtr_(nullptr),
    ecPtr_(nullptr),
    pcPtr_(nullptr),

    cfPtr_(nullptr),
    efPtr_(nullptr),
    pfPtr_(nullptr),

    cePtr_(nullptr),
    fePtr_(nullptr),
    pePtr_(nullptr),
    ppPtr_(nullptr),
    cpPtr_(nullptr),

    labels_(0),

    cellCentresPtr_(nullptr),
    faceCentresPtr_(nullptr),
    cellVolumesPtr_(nullptr),
    faceAreasPtr_(nullptr),
    magFaceAreasPtr_(nullptr)
{}


Foam::primitiveMesh::primitiveMesh
(
    const label nPoints,
    const label nInternalFaces,
    const label nFaces,
    const label nCells
)
:
    nInternalPoints_(-1),
    nPoints_(nPoints),
    nEdges_(-1),
    nInternalFaces_(nInternalFaces),
    nFaces_(nFaces),
    nCells_(nCells),

    cellShapesPtr_(nullptr),
    edgesPtr_(nullptr),
    ccPtr_(nullptr),
    ecPtr_(nullptr),
    pcPtr_(nullptr),

    cfPtr_(nullptr),
    efPtr_(nullptr),
    pfPtr_(nullptr),

    cePtr_(nullptr),
    fePtr_(nullptr),
    pePtr_(nullptr),
    ppPtr_(nullptr),
    cpPtr_(nullptr),

    labels_(0),

    cellCentresPtr_(nullptr),
    faceCentresPtr_(nullptr),
    cellVolumesPtr_(nullptr),
    faceAreasPtr_(nullptr),
    magFaceAreasPtr_(nullptr)
{}


// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //

Foam::primitiveMesh::~primitiveMesh()
{
    clearOut();
}


// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //

bool Foam::primitiveMesh::calcPointOrder
(
    label& nInternalPoints,
    labelList& oldToNew,
    const faceList& faces,
    const label nInternalFaces,
    const label nPoints
)
{
    // Internal points are points that are not used by a boundary face.

    // Map from old to new position
    oldToNew.setSize(nPoints);
    oldToNew = -1;


    // 1. Create compact addressing for boundary points. Start off by indexing
    // from 0 inside oldToNew. (shifted up later on)

    label nBoundaryPoints = 0;
    for (label facei = nInternalFaces; facei < faces.size(); facei++)
    {
        const face& f = faces[facei];

        forAll(f, fp)
        {
            label pointi = f[fp];

            if (oldToNew[pointi] == -1)
            {
                oldToNew[pointi] = nBoundaryPoints++;
            }
        }
    }

    // Now we know the number of boundary and internal points

    nInternalPoints = nPoints - nBoundaryPoints;

    // Move the boundary addressing up
    forAll(oldToNew, pointi)
    {
        if (oldToNew[pointi] != -1)
        {
            oldToNew[pointi] += nInternalPoints;
        }
    }


    // 2. Compact the internal points. Detect whether internal and boundary
    // points are mixed.

    label internalPointi = 0;

    bool ordered = true;

    for (label facei = 0; facei < nInternalFaces; facei++)
    {
        const face& f = faces[facei];

        forAll(f, fp)
        {
            label pointi = f[fp];

            if (oldToNew[pointi] == -1)
            {
                if (pointi >= nInternalPoints)
                {
                    ordered = false;
                }
                oldToNew[pointi] = internalPointi++;
            }
        }
    }

    return ordered;
}


void Foam::primitiveMesh::reset
(
    const label nPoints,
    const label nInternalFaces,
    const label nFaces,
    const label nCells
)
{
    clearOut();

    nPoints_ = nPoints;
    nEdges_ = -1;
    nInternal0Edges_ = -1;
    nInternal1Edges_ = -1;
    nInternalEdges_ = -1;

    nInternalFaces_ = nInternalFaces;
    nFaces_ = nFaces;
    nCells_ = nCells;

    // Check if points are ordered
    label nInternalPoints;
    labelList pointMap;

    bool isOrdered = calcPointOrder
    (
        nInternalPoints,
        pointMap,
        faces(),
        nInternalFaces_,
        nPoints_
    );

    if (isOrdered)
    {
        nInternalPoints_ = nInternalPoints;
    }
    else
    {
        nInternalPoints_ = -1;
    }

    if (debug)
    {
        Pout<< "primitiveMesh::reset : mesh reset to"
            << " nInternalPoints:" << nInternalPoints_
            << " nPoints:" << nPoints_
            << " nEdges:" << nEdges_
            << " nInternalFaces:" << nInternalFaces_
            << " nFaces:" << nFaces_
            << " nCells:" << nCells_
            << endl;
    }
}


void Foam::primitiveMesh::reset
(
    const label nPoints,
    const label nInternalFaces,
    const label nFaces,
    const label nCells,
    cellList& clst
)
{
    reset
    (
        nPoints,
        nInternalFaces,
        nFaces,
        nCells
    );

    cfPtr_ = new cellList(clst, true);
}


void Foam::primitiveMesh::reset
(
    const label nPoints,
    const label nInternalFaces,
    const label nFaces,
    const label nCells,
    cellList&& clst
)
{
    reset
    (
        nPoints,
        nInternalFaces,
        nFaces,
        nCells
    );

    cfPtr_ = new cellList(move(clst));
}


Foam::tmp<Foam::scalarField> Foam::primitiveMesh::movePoints
(
    const pointField& newPoints,
    const pointField& oldPoints
)
{
    if (newPoints.size() <  nPoints() || oldPoints.size() < nPoints())
    {
        FatalErrorInFunction
            << "Cannot move points: size of given point list smaller "
            << "than the number of active points"
            << abort(FatalError);
    }

    // Create swept volumes
    const faceList& f = faces();

    tmp<scalarField> tsweptVols(new scalarField(f.size()));
    scalarField& sweptVols = tsweptVols.ref();

    forAll(f, facei)
    {
        sweptVols[facei] = f[facei].sweptVol(oldPoints, newPoints);
    }

    // Force recalculation of all geometric data with new points
    clearGeom();

    return tsweptVols;
}


const Foam::cellShapeList& Foam::primitiveMesh::cellShapes() const
{
    if (!cellShapesPtr_)
    {
        calcCellShapes();
    }

    return *cellShapesPtr_;
}


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

	/---------------------------------------------------------------------------\
	========= \|
	\\ / F ield \| OpenFOAM: The Open Source CFD Toolbox
	\\ / O peration \| Website: https://openfoam.org
	\\ / A nd \| Copyright (C) 2011-2023 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/>.

	\---------------------------------------------------------------------------/

	#include "primitiveMesh.H"
	#include "demandDrivenData.H"

	// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //

	namespace Foam
	{
	defineTypeNameAndDebug(primitiveMesh, 0);
	}


	// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //

	Foam::primitiveMesh::primitiveMesh()
	:
	nInternalPoints_(0), // note: points are considered ordered on empty mesh
	nPoints_(0),
	nInternal0Edges_(-1),
	nInternal1Edges_(-1),
	nInternalEdges_(-1),
	nEdges_(-1),
	nInternalFaces_(0),
	nFaces_(0),
	nCells_(0),

	cellShapesPtr_(nullptr),
	edgesPtr_(nullptr),
	ccPtr_(nullptr),
	ecPtr_(nullptr),
	pcPtr_(nullptr),

	cfPtr_(nullptr),
	efPtr_(nullptr),
	pfPtr_(nullptr),

	cePtr_(nullptr),
	fePtr_(nullptr),
	pePtr_(nullptr),
	ppPtr_(nullptr),
	cpPtr_(nullptr),

	labels_(0),

	cellCentresPtr_(nullptr),
	faceCentresPtr_(nullptr),
	cellVolumesPtr_(nullptr),
	faceAreasPtr_(nullptr),
	magFaceAreasPtr_(nullptr)
	{}


	Foam::primitiveMesh::primitiveMesh
	(
	const label nPoints,
	const label nInternalFaces,
	const label nFaces,
	const label nCells
	)
	:
	nInternalPoints_(-1),
	nPoints_(nPoints),
	nEdges_(-1),
	nInternalFaces_(nInternalFaces),
	nFaces_(nFaces),
	nCells_(nCells),

	cellShapesPtr_(nullptr),
	edgesPtr_(nullptr),
	ccPtr_(nullptr),
	ecPtr_(nullptr),
	pcPtr_(nullptr),

	cfPtr_(nullptr),
	efPtr_(nullptr),
	pfPtr_(nullptr),

	cePtr_(nullptr),
	fePtr_(nullptr),
	pePtr_(nullptr),
	ppPtr_(nullptr),
	cpPtr_(nullptr),

	labels_(0),

	cellCentresPtr_(nullptr),
	faceCentresPtr_(nullptr),
	cellVolumesPtr_(nullptr),
	faceAreasPtr_(nullptr),
	magFaceAreasPtr_(nullptr)
	{}


	// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //

	Foam::primitiveMesh::~primitiveMesh()
	{
	clearOut();
	}


	// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //

	bool Foam::primitiveMesh::calcPointOrder
	(
	label& nInternalPoints,
	labelList& oldToNew,
	const faceList& faces,
	const label nInternalFaces,
	const label nPoints
	)
	{
	// Internal points are points that are not used by a boundary face.

	// Map from old to new position
	oldToNew.setSize(nPoints);
	oldToNew = -1;


	// 1. Create compact addressing for boundary points. Start off by indexing
	// from 0 inside oldToNew. (shifted up later on)

	label nBoundaryPoints = 0;
	for (label facei = nInternalFaces; facei < faces.size(); facei++)
	{
	const face& f = faces[facei];

	forAll(f, fp)
	{
	label pointi = f[fp];

	if (oldToNew[pointi] == -1)
	{
	oldToNew[pointi] = nBoundaryPoints++;
	}
	}
	}

	// Now we know the number of boundary and internal points

	nInternalPoints = nPoints - nBoundaryPoints;

	// Move the boundary addressing up
	forAll(oldToNew, pointi)
	{
	if (oldToNew[pointi] != -1)
	{
	oldToNew[pointi] += nInternalPoints;
	}
	}


	// 2. Compact the internal points. Detect whether internal and boundary
	// points are mixed.

	label internalPointi = 0;

	bool ordered = true;

	for (label facei = 0; facei < nInternalFaces; facei++)
	{
	const face& f = faces[facei];

	forAll(f, fp)
	{
	label pointi = f[fp];

	if (oldToNew[pointi] == -1)
	{
	if (pointi >= nInternalPoints)
	{
	ordered = false;
	}
	oldToNew[pointi] = internalPointi++;
	}
	}
	}

	return ordered;
	}


	void Foam::primitiveMesh::reset
	(
	const label nPoints,
	const label nInternalFaces,
	const label nFaces,
	const label nCells
	)
	{
	clearOut();

	nPoints_ = nPoints;
	nEdges_ = -1;
	nInternal0Edges_ = -1;
	nInternal1Edges_ = -1;
	nInternalEdges_ = -1;

	nInternalFaces_ = nInternalFaces;
	nFaces_ = nFaces;
	nCells_ = nCells;

	// Check if points are ordered
	label nInternalPoints;
	labelList pointMap;

	bool isOrdered = calcPointOrder
	(
	nInternalPoints,
	pointMap,
	faces(),
	nInternalFaces_,
	nPoints_
	);

	if (isOrdered)
	{
	nInternalPoints_ = nInternalPoints;
	}
	else
	{
	nInternalPoints_ = -1;
	}

	if (debug)
	{
	Pout<< "primitiveMesh::reset : mesh reset to"
	<< " nInternalPoints:" << nInternalPoints_
	<< " nPoints:" << nPoints_
	<< " nEdges:" << nEdges_
	<< " nInternalFaces:" << nInternalFaces_
	<< " nFaces:" << nFaces_
	<< " nCells:" << nCells_
	<< endl;
	}
	}


	void Foam::primitiveMesh::reset
	(
	const label nPoints,
	const label nInternalFaces,
	const label nFaces,
	const label nCells,
	cellList& clst
	)
	{
	reset
	(
	nPoints,
	nInternalFaces,
	nFaces,
	nCells
	);

	cfPtr_ = new cellList(clst, true);
	}


	void Foam::primitiveMesh::reset
	(
	const label nPoints,
	const label nInternalFaces,
	const label nFaces,
	const label nCells,
	cellList&& clst
	)
	{
	reset
	(
	nPoints,
	nInternalFaces,
	nFaces,
	nCells
	);

	cfPtr_ = new cellList(move(clst));
	}


	Foam::tmp<Foam::scalarField> Foam::primitiveMesh::movePoints
	(
	const pointField& newPoints,
	const pointField& oldPoints
	)
	{
	if (newPoints.size() < nPoints() \|\| oldPoints.size() < nPoints())
	{
	FatalErrorInFunction
	<< "Cannot move points: size of given point list smaller "
	<< "than the number of active points"
	<< abort(FatalError);
	}

	// Create swept volumes
	const faceList& f = faces();

	tmp<scalarField> tsweptVols(new scalarField(f.size()));
	scalarField& sweptVols = tsweptVols.ref();

	forAll(f, facei)
	{
	sweptVols[facei] = f[facei].sweptVol(oldPoints, newPoints);
	}

	// Force recalculation of all geometric data with new points
	clearGeom();

	return tsweptVols;
	}


	const Foam::cellShapeList& Foam::primitiveMesh::cellShapes() const
	{
	if (!cellShapesPtr_)
	{
	calcCellShapes();
	}

	return *cellShapesPtr_;
	}


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