#pragma once

#include <limits>

#include <mars_util.h>
#include <mars_grids.h>

#include "gwutil.h"
#include "gmregistry.h"
#include "geomorph.h"
#include "linalgadapt.h"
#include "gwtypes.h"

namespace geoworld
{
	class MountainGM : public HeightMapGeoMorph, public BoundedGeoMorph, public PersistentGeoMorph
	{
	public:
		typedef std::vector < VectorTag< float >::V3 > SeedList;
		
		class MtnState : public PersistentGeoMorph::State
		{
		public:
			SeedList seeds;
			unsigned short nNumMountains;
			float fSeedObedience, fSeedIterations, fRotateThreshold, fPeakHeightFluxPct, fCoarseness, fFalloff, fClumpMaxDisplace;
			unsigned short nMntRangeWidth, nMntRangeAvgHeight;
			GWSurfacePos ptOrigin;
			mars::RangeX< unsigned short > mmnClumpSize;
			mars::BBox< long > bbox;

			virtual mars::ObjectStream & operator >> (mars::ObjectStream & outs) const;
			virtual mars::ObjectStream & operator << (mars::ObjectStream & ins);
		};

		MountainGM (const MtnState & state);
		MountainGM (
			const GWSurfacePos & ptOrigin,
			const float fSeedObedience,
			const float fSeedIterations,
			const unsigned short nMntRangeWidth,
			const unsigned short nMntRangeAvgHeight,
			const mars::RangeX< unsigned short > mmnClumpSize,
			const float fClumpMaxDisplace,
			const unsigned short nNumMountains,
			const float fRotateThreshold,
			const float frPeakHeightFlux,
			const float frCoarseness,
			const float fFalloff
		);

		virtual void init (SynthesisSession & manager, const IGeoWorldAccessor & accessor, const unsigned short nMaxWidth, const unsigned short nMaxHeight);
		virtual mars::BBox< long > getBBox () const { return _bbox; }
		virtual void doMorph (LockedGWSection & section) const;
		virtual mars::ptr< State > createState () const;

	private:
		SeedList _seeds;
		unsigned short _nNumMountains;
		float _fSeedObedience, _fSeedIterations, _fRotateThreshold, _fPeakHeightFluxPct, _fCoarseness, _fFalloff, _fClumpMaxDisplace;
		unsigned short _nMntRangeWidth, _nMntRangeAvgHeight;
		GWSurfacePos _ptOrigin;
		mars::RangeX< unsigned short > _mmnClumpSize;
		mars::BBox< long > _bbox;
	};

	class MountainGMFactory : public GeoMorphFactory, public IPersistentGeoMorphFactory, public ISurfaceBoundedGeoMorphFactory
	{
	private:
		mars::RangeX< unsigned short >
			_mmnNumMountains,
			_mmnClumpSize,
			_mmnRangeWidth,
			_mmnPeakAvgHeight;

		mars::RangeX< float >
			_mmfRotateThreshold,
			_mmfSeedIterations;

		float
			_fSeedObedience,
			_frPeakHeightFlux,
			_fCoarseness,
			_fFalloff,
			_fClumpMaxDisplace;

	public:
		virtual GeoMorph * createRandomInstance(const long x, const long y) const;
		virtual void configure( IConfigGMFactory * pFactoryConfig, const IConfigGMFactory::Settings & settings );
		virtual void save (const GeoMorph * pGM, mars::ObjectStream & outs) const;
		virtual const GeoMorph * restore (mars::ObjectStream & ins) const;
	};
}