/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2011 Sandro Santilli <strk@keybit.net>
 * Copyright (C) 2006 Refractions Research Inc.
 * Copyright (C) 2001-2002 Vivid Solutions 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/NodedSegmentString.java r320 (JTS-1.12)
 *
 **********************************************************************/


#include <geos/noding/NodedSegmentString.h>
#include <geos/noding/Octant.h>
#include <geos/algorithm/LineIntersector.h>

using namespace geos::algorithm;
using namespace geos::geom;

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

const SegmentNodeList&
NodedSegmentString::getNodeList() const
{
	return nodeList;
}

SegmentNodeList&
NodedSegmentString::getNodeList()
{
	return nodeList;
}

/*static private*/
int
NodedSegmentString::safeOctant(const Coordinate& p0, const Coordinate& p1) 
{
  if ( p0.equals2D(p1) ) return 0;
	return Octant::octant(p0, p1);
}


/*public*/
int
NodedSegmentString::getSegmentOctant(unsigned int index) const
{
	if (index >= size() - 1) return -1;
	return safeOctant(getCoordinate(index), getCoordinate(index+1));
	//return Octant::octant(getCoordinate(index), getCoordinate(index+1));
}

/*public*/
void
NodedSegmentString::addIntersections(LineIntersector *li, unsigned int
		segmentIndex, int geomIndex)
{
	for (int i=0, n=li->getIntersectionNum(); i<n; ++i) {
		addIntersection(li, segmentIndex, geomIndex, i);
	}
}

/*public*/
void
NodedSegmentString::addIntersection(LineIntersector *li,
		unsigned int segmentIndex,
		int geomIndex, int intIndex)
{
    ::geos::ignore_unused_variable_warning(geomIndex);

	const Coordinate &intPt=li->getIntersection(intIndex);
	addIntersection(intPt, segmentIndex);
}

/*public*/
void
NodedSegmentString::addIntersection(const Coordinate& intPt,
	unsigned int segmentIndex)
{
	unsigned int normalizedSegmentIndex = segmentIndex;

	if ( segmentIndex > size()-2 )
	{
		throw util::IllegalArgumentException("SegmentString::addIntersection: SegmentIndex out of range");
	}

	// normalize the intersection point location
	unsigned int nextSegIndex = normalizedSegmentIndex + 1;
	if (nextSegIndex < size())
	{
		const Coordinate& nextPt = pts->getAt(nextSegIndex);

		// Normalize segment index if intPt falls on vertex
		// The check for point equality is 2D only -
		// Z values are ignored
		if (intPt.equals2D(nextPt)) {
			normalizedSegmentIndex = nextSegIndex;
		}
	}

	/*
	 * Add the intersection point to edge intersection list
	 * (unless the node is already known)
	 */
	//SegmentNode *ei=
	nodeList.add(intPt, normalizedSegmentIndex);


}

/* public static */
void
NodedSegmentString::getNodedSubstrings(
	const SegmentString::NonConstVect& segStrings,
	SegmentString::NonConstVect *resultEdgeList)
{
	assert(resultEdgeList);
	for ( SegmentString::NonConstVect::const_iterator
		i=segStrings.begin(), iEnd=segStrings.end();
		i != iEnd; ++i )
	{
		NodedSegmentString* ss = dynamic_cast<NodedSegmentString*>(*i);
		assert(ss);
		ss->getNodeList().addSplitEdges(resultEdgeList);
	}
}

/* public static */
SegmentString::NonConstVect*
NodedSegmentString::getNodedSubstrings(
		const SegmentString::NonConstVect& segStrings)
{
	SegmentString::NonConstVect* resultEdgelist = \
		new SegmentString::NonConstVect();
	getNodedSubstrings(segStrings, resultEdgelist);
	return resultEdgelist;
}

/* virtual public */
const geom::Coordinate&
NodedSegmentString::getCoordinate(unsigned int i) const
{
	return pts->getAt(i);
}

/* virtual public */
geom::CoordinateSequence*
NodedSegmentString::getCoordinates() const
{
	return pts;
}

/* virtual public */
bool
NodedSegmentString::isClosed() const
{
	return pts->getAt(0)==pts->getAt(size()-1);
}

/* public virtual */
std::ostream&
NodedSegmentString::print(std::ostream& os) const
{
	os << "NodedSegmentString: " << std::endl;
	os << " LINESTRING" << *(pts) << ";" << std::endl;
	os << " Nodes: " << nodeList.size() << std::endl;

	return os;
}


} // geos::noding
} // geos