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

 *

 * GEOS - Geometry Engine Open Source

 * http://geos.osgeo.org

 *

 * Copyright (C) 2020 Paul Ramsey <pramsey@cleverelephant.ca>

 *

 * This is free software; you can redistribute and/or modify it under

 * the terms of the GNU Lesser General Public Licence as published

 * by the Free Software Foundation.

 * See the COPYING file for more information.

 *

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

#include <geos/operation/overlayng/MaximalEdgeRing.h>

#include <geos/operation/overlayng/OverlayEdge.h>

#include <geos/operation/overlayng/OverlayLabel.h>

#include <geos/operation/overlayng/OverlayEdgeRing.h>

#include <geos/geom/Location.h>

#include <geos/geom/Coordinate.h>

#include <geos/geom/CoordinateSequence.h>

using geos::geom::CoordinateSequence;

using geos::geom::Coordinate;

using geos::geom::Location;

namespace geos {      // geos

namespace operation { // geos.operation

namespace overlayng { // geos.operation.overlayng

/*public*/

std::shared_ptr<const CoordinateSequence>

OverlayEdge::getCoordinatesOriented() const

{

    if (direction) {

        return pts;

    }

    std::unique_ptr<CoordinateSequence> ptsCopy = pts->clone();

    ptsCopy->reverse();

    return ptsCopy;

}

/**

* Adds the coordinates of this edge to the given list,

* in the direction of the edge.

* Duplicate coordinates are removed

* (which means that this is safe to use for a path

* of connected edges in the topology graph).

*

* @param coords the coordinate list to add to

*/

/*public*/

void

OverlayEdge::addCoordinates(CoordinateSequence* coords) const

{

    bool isFirstEdge = coords->size() > 0;

    if (direction) {

        std::size_t startIndex = 1;

        if (isFirstEdge) {

            startIndex = 0;

        }

        coords->add(*pts, startIndex, pts->size() - 1, false);

    }

    else { // is backward

        int startIndex = (int)(pts->size()) - 2;

        if (isFirstEdge) {

            startIndex = (int)(pts->size()) - 1;

        }

        for (int i = startIndex; i >= 0; i--) {

            coords->add(*pts, static_cast<std::size_t>(i), static_cast<std::size_t>(i), false);

        }

    }

}

/*public friend*/

std::ostream&

operator<<(std::ostream& os, const OverlayEdge& oe)

{

    os << "OE( " << oe.orig();

    if (oe.pts->size() > 2) {

        os << ", " << oe.directionPt();

    }

    os << " .. " << oe.dest() << " ) ";

    oe.label->toString(oe.direction, os);

    os << oe.resultSymbol();

    os << " / Sym: ";

    oe.symOE()->getLabel()->toString(oe.symOE()->direction, os);

    os << oe.symOE()->resultSymbol();

    return os;

}

/*public*/

std::string

OverlayEdge::resultSymbol() const

{

    if (isInResultArea()) return std::string(" resA");

    if (isInResultLine()) return std::string(" resL");

    return std::string("");

}

} // namespace geos.operation.overlayng

} // namespace geos.operation

} // namespace geos