/**********************************************************************
 *
 * 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 Licence as published
 * by the Free Software Foundation.
 * See the COPYING file for more information.
 *
 **********************************************************************
 *
 * Last port: simplify/TaggedLinesSimplifier.java rev. 1.4 (JTS-1.7.1)
 *
 **********************************************************************
 *
 * NOTES: changed from JTS design adding a private
 *        TaggedLineStringSimplifier member and making
 *        simplify(collection) method become a templated
 *        function.
 *
 **********************************************************************/

#pragma once

#include <geos/export.h>
#include <vector>
#include <memory>
#include <cassert>

#include <geos/simplify/LineSegmentIndex.h> // for templated function body
#include <geos/simplify/TaggedLineStringSimplifier.h>

#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
#endif

// Forward declarations
namespace geos {
namespace simplify {
class TaggedLineString;
}
}

namespace geos {
namespace simplify { // geos::simplify

/** \brief
 * Simplifies a collection of TaggedLineStrings, preserving topology
 * (in the sense that no new intersections are introduced).
 */
class GEOS_DLL TaggedLinesSimplifier {

public:

    TaggedLinesSimplifier();

    /** \brief
     * Sets the distance tolerance for the simplification.
     *
     * All vertices in the simplified geometry will be within this
     * distance of the original geometry.
     *
     * @param tolerance the approximation tolerance to use
     */
    void setDistanceTolerance(double tolerance);

    /** \brief
     * Simplify a set of {@link TaggedLineString}s
     *
     * @tparam iterator_type an iterator, must support assignment, increment,
     *                       inequality and dereference operators. Dereference
     *                       operator must return a `TaggedLineString*`.
     * @param begin iterator to the first element to be simplified.
     * @param end an iterator to one-past-last element to be simplified.
     */
    template <class iterator_type>
    void
    simplify(
        iterator_type begin,
        iterator_type end)
    {
        // add lines to the index
        for(iterator_type it = begin; it != end; ++it) {
            assert(*it);
            inputIndex->add(*(*it));
        }

        // Simplify lines
        for(iterator_type it = begin; it != end; ++it) {
            assert(*it);
            simplify(*(*it));
        }
    }


private:

    void simplify(TaggedLineString& line);

    std::unique_ptr<LineSegmentIndex> inputIndex;

    std::unique_ptr<LineSegmentIndex> outputIndex;

    std::unique_ptr<TaggedLineStringSimplifier> taggedlineSimplifier;
};

} // namespace geos::simplify
} // namespace geos

#ifdef _MSC_VER
#pragma warning(pop)
#endif

