/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2006      Refractions Research Inc.
 *
 * 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.
 *
 **********************************************************************
 *
 * Last port: noding/IteratedNoder.java r591 (JTS-1.12+)
 *
 **********************************************************************/

#ifndef GEOS_NODING_ITERATEDNODER_H
#define GEOS_NODING_ITERATEDNODER_H

#include <geos/export.h>

#include <vector>
#include <iostream>

#include <geos/inline.h>

#include <geos/algorithm/LineIntersector.h>
#include <geos/noding/SegmentString.h> // due to inlines
#include <geos/noding/Noder.h> // for inheritance

// Forward declarations
namespace geos {
namespace geom {
class PrecisionModel;
}
}

namespace geos {
namespace noding { // geos::noding

/** \brief
 * Nodes a set of SegmentStrings completely.
 *
 * The set of segmentStrings is fully noded;
 * i.e. noding is repeated until no further
 * intersections are detected.
 *
 * Iterated noding using a FLOATING precision model is not guaranteed to converge,
 * due to roundoff error. This problem is detected and an exception is thrown.
 * Clients can choose to rerun the noding using a lower precision model.
 *
 */
class GEOS_DLL IteratedNoder : public Noder { // implements Noder

private:
    static const int MAX_ITER = 5;


    const geom::PrecisionModel* pm;
    algorithm::LineIntersector li;
    std::vector<SegmentString*>* nodedSegStrings;
    int maxIter;

    /**
     * Node the input segment strings once
     * and create the split edges between the nodes
     */
    void node(std::vector<SegmentString*>* segStrings,
              int* numInteriorIntersections);

public:

    IteratedNoder(const geom::PrecisionModel* newPm)
        :
        pm(newPm),
        li(pm),
        maxIter(MAX_ITER)
    {
    }

    ~IteratedNoder() override {}

    /** \brief
     * Sets the maximum number of noding iterations performed before
     * the noding is aborted.
     *
     * Experience suggests that this should rarely need to be changed
     * from the default.
     * The default is MAX_ITER.
     *
     * @param n the maximum number of iterations to perform
     */
    void
    setMaximumIterations(int n)
    {
        maxIter = n;
    }

    std::vector<SegmentString*>*
    getNodedSubstrings() const override
    {
        return nodedSegStrings;
    }


    /** \brief
     * Fully nodes a list of {@link SegmentString}s, i.e. peforms noding iteratively
     * until no intersections are found between segments.
     *
     * Maintains labelling of edges correctly through the noding.
     *
     * @param inputSegmentStrings a collection of SegmentStrings to be noded
     * @throws TopologyException if the iterated noding fails to converge.
     */
    void computeNodes(std::vector<SegmentString*>* inputSegmentStrings) override; // throw(GEOSException);
};

} // namespace geos::noding
} // namespace geos


#endif // GEOS_NODING_ITERATEDNODER_H
