/*
 * (C) Copyright 1996-2016 ECMWF.
 * 
 * This software is licensed under the terms of the Apache Licence Version 2.0
 * which can be obtained at http://www.apache.org/licenses/LICENSE-2.0. 
 * In applying this licence, ECMWF does not waive the privileges and immunities 
 * granted to it by virtue of its status as an intergovernmental organisation nor
 * does it submit to any jurisdiction.
 */

/*! \file Proj4Projection.cc
    \brief Implementation of Proj4Projection.
    \author Meteorological Visualisation Section, ECMWF

    Started: Tue May 18 17:39:58 2010

*/

#include <Proj4Projection.h>
#include <Polyline.h>
#include <GridPlotting.h>
#include <LabelPlotting.h>
#include <Text.h>
#include "MetaData.h"
#include "MagConfig.h"
#include <MatrixHandler.h>
#include <ParameterSettings.h>
#include <Layer.h>
#include <MagJSon.h>

namespace magics
{

class Epsg
{
public:
	Epsg(const string& name) : name_(name) {
		epsgs_.insert(make_pair(lowerCase(name), this));
		methods_["definition"] = &Epsg::definition;
		methods_["min_longitude"] = &Epsg::minlon;
		methods_["min_latitude"] = &Epsg::minlat;
		methods_["max_longitude"] = &Epsg::maxlon;
		methods_["max_latitude"] = &Epsg::maxlat;
		methods_["method"] = &Epsg::method;
		initMethods_["geos"] = &Epsg::geosinit;
	}
	string name_;
	string definition_;

	typedef void (Epsg::*InitMethod)(const Proj4Projection&);
	typedef void (Epsg::*Method)(const json_spirit::Value&);
	map<string,  Method> methods_;
	map<string,  InitMethod> initMethods_;

	void definition(const json_spirit::Value& value) {
		definition_ =  value.get_value<string>();
	}
	void minlon(const json_spirit::Value& value) {
		minlon_ =  value.get_value<double>();
	}
	void minlat(const json_spirit::Value& value) {
		minlat_ =  value.get_value<double>();
	}
	void maxlon(const json_spirit::Value& value) {
		maxlon_ =  value.get_value<double>();
	}
	void maxlat(const json_spirit::Value& value) {
		maxlat_ =  value.get_value<double>();
	}
	void method(const json_spirit::Value& value) {
		method_ =  value.get_value<string>();
	}

	void init(const Proj4Projection& from) {
		map<string,  InitMethod >::iterator initmethod = initMethods_.find(name_);
		if ( initmethod != initMethods_.end() ) {
			( this->*initmethod->second)(from) ;
		}
	}

	void geosinit(const Proj4Projection& from) {
		
		minlon_ = from.vertical_longitude_ - 80;
		maxlon_ = from.vertical_longitude_ + 80;
		minlat_ = -80;
		maxlat_ = 80;
		
		ostringstream def;
		def << "+proj=geos +h=42164000 +ellps=WGS84 +lon_0=" << from.vertical_longitude_;

		definition_ = def.str();
		
	}


	double minlon_ ;
	double minlat_;
	double maxlon_ ;
	double maxlat_;

	string method_;

	static map<string, Epsg*> epsgs_;

	void  set(const json_spirit::Value&);

	static Epsg* find(const Proj4Projection& from) {
		string name = lowerCase(from.name());
		map<string, Epsg*>::iterator epsg = epsgs_.find(name);
		if ( epsg == epsgs_.end() )  {
			MagLog::warning() << "Can not find information on " << name << ": use epsg instead" << endl;
			return epsgs_.find("EPSG:4326")->second;
		}
		epsg->second->init(from);

		return epsg->second;
	}

	const char* definition() { return definition_.c_str(); }

};



class EpsgConfig : public MagConfig
{
public:
	EpsgConfig() {}
	~EpsgConfig() {}

	void callback(const string&, const json_spirit::Value&);
	void init();
	Epsg* epsg_;
};
}
using namespace magics;

map<string, Epsg*> Epsg::epsgs_;

void EpsgConfig::init()
{
	//methods_["epsg"] =  &EpsgConfig::epsg;
	MagConfigHandler(getEnvVariable("MAGPLUS_HOME") + MAGPLUS_PATH_TO_SHARE_ + "/epsg.json", *this);
}
void Epsg::set(const json_spirit::Value& value)
{
	ASSERT (value.type() == json_spirit::obj_type);
	json_spirit::Object object =value.get_value< json_spirit::Object >();
	for (vector<json_spirit::Pair>::const_iterator entry = object.begin(); entry !=  object.end(); ++entry) {

		map<string,  Method >::iterator method = methods_.find(entry->name_);
	    if ( method != methods_.end() ) {
	    	   ( (this->*method->second)(entry->value_) );
	    }

	}
}
void  EpsgConfig::callback(const string& name, const json_spirit::Value& value)
{

	// here we get an Array of epsg!

	ASSERT (value.type() == json_spirit::array_type);
	json_spirit::Array values = value.get_value<json_spirit::Array>();
	for (unsigned int i = 0; i < values.size(); i++) {
		json_spirit::Object object = values[i].get_value< json_spirit::Object >();
		 for (vector<json_spirit::Pair>::const_iterator entry = object.begin(); entry !=  object.end(); ++entry) {

		 	Epsg* epsg = new Epsg(entry->name_);
		 	epsg->set( entry->value_);
		 }
	}

}

/*!
  \brief Constructor
*/
Proj4Projection::Proj4Projection(const string& definition) : definition_(definition),
						gridMinLon_(DBL_MAX),
						gridMinLat_(DBL_MAX),
						gridMaxLon_(-DBL_MAX),
						gridMaxLat_(-DBL_MAX)
{

	//init();
	EpsgConfig config;
	config.init();
}

Proj4Projection::Proj4Projection(): gridMinLon_(DBL_MAX),
		gridMinLat_(DBL_MAX),
		gridMaxLon_(-DBL_MAX),
		gridMaxLat_(-DBL_MAX)
{
	//init();
	EpsgConfig config;
	config.init();
}


/*!
  \brief Destructor
*/
Proj4Projection::~Proj4Projection() 
{	
}

void Proj4Projection::print(ostream& out) const
{
    out << "Proj4Projection[";
    Proj4ProjectionAttributes::print(out);
    out << "]"; 
} 

Polyline& Proj4Projection::getPCBoundingBox() const
{
	return *PCEnveloppe_;
}

Polyline& Proj4Projection::getUserBoundingBox() const
{
	return *userEnveloppe_;
}

void Proj4Projection::init()  
{
	MagLog::dev() << "Proj4Projection::init()" << *this << endl;

	from_ = pj_init_plus("+proj=longlat +ellps=WGS84 +datum=WGS84");
	projection_ = Epsg::find(*this);
	to_    = pj_init_plus(projection_->definition());
	if ( !to_) {
		MagLog::error() << pj_strerrno(pj_errno) << endl;
		MagLog::error() << " proj4 error " << projection_->definition() << endl;
		ASSERT(false);
	}


	methods_["geos"] = &Proj4Projection::geos;
	methods_["conic"] = &Proj4Projection::conic;
	methods_["simple"] = &Proj4Projection::simple;
	
	

	map<string,  InitMethod >::iterator method = methods_.find(projection_->method_);
	if ( method != methods_.end() )
		(this->*method->second)();
	else
		simple();


	helpers_["full"] = &Proj4Projection::full;
	helpers_["corners"] = &Proj4Projection::corners;
	helpers_["centre"] = &Proj4Projection::centre;
	helpers_["projection"] = &Proj4Projection::projectionSimple;

	if ( coordinates_system_ == "projection" ) 
		setting_ = "projection";

	map<string,  SettingHelper >::iterator helper = helpers_.find(lowerCase(setting_));

	if ( helper != helpers_.end() )
		(this->*helper->second)();
	else {
		MagLog::warning() << " Coud not fing method " << setting_ << " to set the geographical area"
				<< "  Going back to default area" << endl;

		full();
	}

	askedxmin_ =  std::min(min_pcx_, max_pcx_);
	askedxmax_ =  std::max(min_pcx_, max_pcx_);
	askedymin_ =  std::min(min_pcy_, max_pcy_);
	askedymax_ =  std::max(min_pcy_, max_pcy_);
}

void Proj4Projection::full()
{
	if ( projection_->method_ == "simple" ) {

		if ( max_longitude_ != 180. ) {
			if ( max_latitude_ == 90 )	
				max_latitude_ = projection_->maxlat_;
			if ( min_latitude_ == -90 )	
				min_latitude_ = projection_->minlat_;
			corners();
			return;
		}
		if ( max_longitude_ == 180. ) {
			projection_->maxlon_ = 180.;
			if ( max_latitude_ == 90 )	
				max_latitude_ = projection_->maxlat_;
			if ( min_latitude_ == -90 )	
				min_latitude_ = projection_->minlat_;
			corners();
			return;
		}
		
		if ( min_longitude_ != -180 ) {

			// set projection default ! 
			if ( max_latitude_ == 90 )	
				max_latitude_ = projection_->maxlat_;
			if ( min_latitude_ == -90 )	
				min_latitude_ = projection_->minlat_;
			corners();
		}
		
		if ( min_latitude_ != -90 ) {
			
			if ( max_latitude_ == 90 )	
				max_latitude_ = projection_->maxlat_;
			
			corners();
			return;
		}
		if ( max_latitude_ != 90 ) {
			if ( min_longitude_ == -180 )
				min_longitude_ = projection_->minlon_;
			if ( min_latitude_ == -90 )	
				min_latitude_ = projection_->minlat_;			
			corners();
			return;
		}
	
	}
	
}

void Proj4Projection::corners()
{
	// we have to update the PCBounding box!
		min_pcx_ = min_longitude_;
		min_pcy_ = min_latitude_;
		max_pcx_ = max_longitude_;
		max_pcy_ = max_latitude_;

		fast_reproject(min_pcx_, min_pcy_);
		fast_reproject(max_pcx_, max_pcy_);

		Polyline box;
		box.box(PaperPoint(min_pcx_, min_pcy_), PaperPoint(max_pcx_, max_pcy_));

		vector<Polyline> newbox;
		PCEnveloppe_->intersect(box, newbox);
		if ( newbox.empty() ) {
			MagLog::warning() << "Proj4 : the sub-area is not valid : use global view instead" << endl;
		}
		else {
			PCEnveloppe_ = newbox.front().clone();
		}
}

void Proj4Projection::centre()
{
}

PaperPoint Proj4Projection::operator()(const UserPoint& point)  const
{
	if ( ! from_ ) {
		from_ = pj_init_plus("+proj=longlat +ellps=WGS84 +datum=WGS84");
		projection_ = Epsg::find(*this);
		to_    = pj_init_plus(projection_->definition());
	}
	double x = point.x();
	double y = point.y();
	
	
	

	

	x *= DEG_TO_RAD;
	y *= DEG_TO_RAD;

    int error = pj_transform(from_, to_, 1, 1, &x, &y, NULL);
    if ( error ) {
		MagLog::debug() << pj_strerrno(error) << " for " << point << endl;
//		NON Valeurs trop faibles en EPSG:3857 par exemple !  --> Transformation::in(pp) == True !
//		-> Avec ces valeurs, si grille globale, les barbules des poles sont tracées dans l'atlantique sud
//		en formant une couronne centrée vers( 9°W, 66°35S)
//		return PaperPoint(-1000000, -10000000);   .// En plus il manque 1 zero !
		return PaperPoint(-1e10, -1e10);    // Devrait suffire pour que Transformation::in(pp) == False qqsoient from_ et to_
	}
	
	return PaperPoint(x, y, point.value_, point.missing(), point.border(), 0, point.name());
}

PaperPoint Proj4Projection::operator()(const PaperPoint& point)  const
{
	MagLog::dev() << "Proj4Projection::operator()(...) needs implementing." << endl;
	return Transformation::operator()(point);
}

void Proj4Projection::setNewPCBox(double minx, double miny, double maxx, double maxy)
{
	   PaperPoint p1(minx, miny);
	   PaperPoint p2(maxx, maxy);
	   UserPoint   ll, ur;

	   revert(p1, ll);
	   revert(p2, ur);

	   min_longitude_ =ll.x();
	   max_longitude_ = ur.x();
	   min_latitude_ = ll.y();
	   max_latitude_ = ur.y();
	min_pcx_ = minx;
	max_pcx_ = maxx;
	min_pcy_ = miny;
	max_pcy_ = maxy;
}

void Proj4Projection::revert(const PaperPoint& xy, UserPoint& point)  const
{
	static bool first = true;
	if ( first ) {
		
		const_cast<Proj4Projection*>(this)->init();
		first = false;
	}
	if ( PCEnveloppe_->within(xy) == false ) {
				  point = UserPoint(-1000, -1000);
				  
			 return;
	}


	double x = xy.x();
	double y = xy.y();

	int error = pj_transform(to_, from_, 1, 1, &x, &y, NULL );

	if ( error ) {
		MagLog::debug() << pj_strerrno(error) << endl;
		point = UserPoint(-1000, -1000);
		return;
	}

	x *= RAD_TO_DEG;
	y *= RAD_TO_DEG;

	point = UserPoint(x, y);
}


bool Proj4Projection::needShiftedCoastlines()  const
{
	// Will need w new parameter to know!
	return false;
}

void Proj4Projection::aspectRatio(double& width, double& height)  
{
	MagLog::dev() << "Proj4Projection::aspectRatio(...) needs implementing." << endl;
	Transformation::aspectRatio(width, height);
}


void Proj4Projection::add(double lon, double lat)
{
	double x = lon*DEG_TO_RAD;
	double y = DEG_TO_RAD*lat;
	int error =  pj_transform(from_, to_, 1, 1, &x, &y, NULL );
	userEnveloppe_->push_back(PaperPoint(lon, lat));
	PCEnveloppe_->push_back(PaperPoint(x, y));
	
	if ( x < min_pcx_ )  min_pcx_ = x;
	if ( y < min_pcy_ )  min_pcy_ = y;
	if ( x > max_pcx_ )  max_pcx_ = x;
	if ( y > max_pcy_ )  max_pcy_ = y;
	if ( lon < gridMinLon_)  gridMinLon_ = lon;
	if ( lat < gridMinLat_ )  gridMinLat_ = lat;
	if ( lon > gridMaxLon_)  gridMaxLon_ = lon;
	if ( lat > gridMaxLat_ )  gridMaxLat_ = lat;
}

void Proj4Projection::conic()
{
	userEnveloppe_->clear();
		PCEnveloppe_->clear();
	min_pcx_ = DBL_MAX;
		min_pcy_ = DBL_MAX;
		max_pcx_ = -DBL_MAX;
		max_pcy_ = -DBL_MAX;
	/*
	// left
	for ( int lat = projection_->minlat_; lat <= projection_->maxlat_; lat++) {
		add(projection_->minlon_, lat);
	}
	*/
	// top
	add( projection_->minlon_ - vertical_longitude_, projection_->maxlat_);
	for ( int lon = projection_->minlon_; lon <= projection_->maxlon_; lon++) {
		add(lon, projection_->minlat_);
	}
	add( projection_->maxlon_, projection_->maxlat_);
	PCEnveloppe_->correct();
	userEnveloppe_->correct();
	/*
	// right
	for ( int lat = projection_->maxlat_; lat >= projection_->minlat_; lat--) {
		add(projection_->maxlon_, lat);
	}
	// bottom
	for ( int lon = projection_->maxlon_; lon >= projection_->minlon_; lon--) {
			add(lon, projection_->minlat_);
		}
	*/
}



void Proj4Projection::simple()
{
	userEnveloppe_->clear();
	PCEnveloppe_->clear();
	min_pcx_ = DBL_MAX;
	min_pcy_ = DBL_MAX;
	max_pcx_ = -DBL_MAX;
	max_pcy_ = -DBL_MAX;
	add(projection_->minlon_, projection_->minlat_);
	add(projection_->minlon_, projection_->maxlat_);
	add(projection_->maxlon_, projection_->maxlat_);
	add(projection_->maxlon_, projection_->minlat_);
	add(projection_->minlon_, projection_->minlat_);
}

void Proj4Projection::projectionSimple()
{

		min_pcx_ = min_longitude_;
		min_pcy_ = min_latitude_;
		max_pcx_ = max_longitude_;
		max_pcy_ = max_latitude_;
		pj_transform(to_, from_, 1, 1, &min_longitude_, &min_latitude_, NULL );
		pj_transform(to_, from_, 1, 1, &max_longitude_, &max_latitude_, NULL );
	
		min_longitude_ *= RAD_TO_DEG;
		min_latitude_ *= RAD_TO_DEG;
		max_longitude_ *= RAD_TO_DEG;
		max_latitude_ *= RAD_TO_DEG;
	
		Polyline box;
		box.box(PaperPoint(min_pcx_, min_pcy_), PaperPoint(max_pcx_, max_pcy_));

		vector<Polyline> newbox;
		PCEnveloppe_->intersect(box, newbox);
		if ( newbox.empty() ) {
			MagLog::warning() << "Proj4 : the sub-area is not valid : use global view instead" << endl;
		}
		else {
			PCEnveloppe_ = newbox.front().clone();
		}
		// reset 
		setting_ = "corners";
		coordinates_system_ = "latlon";
	
}



void Proj4Projection::geos()
{
	userEnveloppe_->clear();
	PCEnveloppe_->clear();
	// here we have to prepare the enveloppe!
	min_pcx_ = DBL_MAX;
		min_pcy_ = DBL_MAX;
		max_pcx_ = -DBL_MAX;
		max_pcy_ = -DBL_MAX;

		PCEnveloppe_->correct();
		userEnveloppe_->correct();

		map<double, vector<double> > helper;

		for ( int lat = projection_->minlat_; lat <= projection_->maxlat_; lat++) {
			helper.insert(make_pair(lat, vector<double>()));
			for ( int lon =  projection_->minlon_; lon <= projection_->maxlon_; lon++) {
				double x = lon*DEG_TO_RAD;
				double y = DEG_TO_RAD*lat;
				int error =  pj_transform(from_, to_, 1, 1, &x, &y, NULL );
				if ( !error) {
					helper[lat].push_back(lon);
				}
			}
		}
		// now we create the envelope...
		for ( map<double, vector<double> >::iterator lat = helper.begin(); lat != helper.end(); ++lat) {
			if ( lat->second.empty() )
				continue;
			add(lat->second.front(), lat->first);

		}
		// now reverse!
		for ( map<double, vector<double> >::reverse_iterator lat = helper.rbegin(); lat != helper.rend(); ++lat) {
			if ( lat->second.empty() )
				continue;
			add(lat->second.back(), lat->first);
			userEnveloppe_->push_back(PaperPoint(lat->second.back(), lat->first));
		}
}



void Proj4Projection::boundingBox(double& xmin, double& ymin, double& xmax, double& ymax)  const
{
	if ( ! from_ ) {
			from_ = pj_init_plus("+proj=longlat +ellps=WGS84 +datum=WGS84");
			projection_ = Epsg::find(definition_);
			to_    = pj_init_plus(proj4_definition_.c_str());
		}
	ymin = gridMinLat_;
	xmin = gridMinLon_-5;
	ymax = gridMaxLat_;
	xmax = gridMaxLon_+5;
}

double Proj4Projection::getMinX()  const
{
	return gridMinLon_;
}

double Proj4Projection::getMinY()  const
{
	return gridMinLat_;
}

double Proj4Projection::getMaxX()  const
{
	return gridMaxLon_;
}

double Proj4Projection::getMaxY()  const
{
	return gridMaxLat_;
}

void Proj4Projection::setMinX(double x)  
{
	min_longitude_ = x;
}

void Proj4Projection::setMinY(double y)  
{
	min_latitude_ = y;
}

void Proj4Projection::setMaxX(double x)  
{
	max_longitude_ = x;
}

void Proj4Projection::setMaxY(double y)  
{
	max_latitude_ = y;
}

double Proj4Projection::getMinPCX()  const
{
	return min_pcx_;
}

double Proj4Projection::getMinPCY()  const
{
	return min_pcy_;
}

double Proj4Projection::getMaxPCX()  const
{
	return max_pcx_;
}

double Proj4Projection::getMaxPCY()  const
{
	return max_pcy_;
}


void Proj4Projection::gridLongitudes(const GridPlotting& grid)  const
{
	Polyline boundaries;

	for (Polyline::MagLine::const_iterator point = PCEnveloppe_->begin(); point != PCEnveloppe_->end(); ++point )
	{
		boundaries.push_back(*point);
	}

	grid.add(boundaries);

	
	vector<double> longitudes = grid.longitudes();


		const double step = 0.5;
		longitudes.push_back(180);
		const vector<double>::const_iterator lon_end =longitudes.end();

		for (vector<double>::const_iterator lon = longitudes.begin(); lon != lon_end; ++lon)
		{

			Polyline poly;
			poly.setAntiAliasing(false);

			for (double lat = gridMinLat_; (lat == gridMaxLat_ || lat < gridMaxLat_ + step); lat += step)
			{
				PaperPoint p(*lon, lat);
				if ( userEnveloppe_->within(p) )
					poly.push_back((*this)(UserPoint(*lon,lat)));
			}
			if ( *lon == gridMinLon_ || *lon == gridMaxLon_) 
				grid.addFrame(poly);
			else 
				grid.add(poly);
		}
}

void Proj4Projection::gridLatitudes(const GridPlotting& grid)  const
{
	const vector<double>& latitudes = grid.latitudes();

	const double step = 0.5;
	const vector<double>::const_iterator lat_end = latitudes.end();
	for(vector<double>::const_iterator lat = latitudes.begin(); lat != lat_end; ++lat)
	{

		Polyline poly;
		poly.setAntiAliasing(false);
		for (double lon = gridMinLon_; lon <= gridMaxLon_ + step; lon += step)
		{
			PaperPoint p(lon, *lat);
			if ( userEnveloppe_->within(p) )
				poly.push_back((*this)(UserPoint(lon,*lat)));
		}
		if ( *lat == gridMinLat_ || *lat == gridMaxLat_) 
				grid.addFrame(poly);
			else 
				grid.add(poly);
		
	}
}

void Proj4Projection::labels(const LabelPlotting& label, DrawingVisitor& visitor)  const
{
	if ( projection_->method_ == "simple" ) 
		return;
	vector<double> pro4_longitudes;
	pro4_longitudes.push_back(0);
	pro4_longitudes.push_back(90);
	pro4_longitudes.push_back(-90);
	//pro4_longitudes.push_back(180);
	//pro4_longitudes.push_back(-180);
	const vector<double>& longitudes = label.longitudes();
	const vector<double>& latitudes = label.latitudes();
	for (vector<double>::const_iterator lat = latitudes.begin(); lat != latitudes.end(); ++lat)
	{
		for (vector<double>::iterator lon = pro4_longitudes.begin(); lon != pro4_longitudes.end(); ++lon)
		{
			vector<double>::const_iterator ilon = find(longitudes.begin(), longitudes.end(), *lon);
			if ( ilon == longitudes.end() )
				continue;

			UserPoint point(*lon, *lat);
			PaperPoint xy = (*this)(point);

			if ( !in(xy) ) continue;

			Text *text = new Text();
			label.add(text);
			text->setText(writeLatitude(point));
			text->push_back(xy);
			text->setBlanking(true);
		}
	}
}


void Proj4Projection::labels(const LabelPlotting& label, LeftAxisVisitor& visitor)  const
{
	if ( projection_->method_ == "simple" ) {
		const vector<double>& latitudes = label.latitudes();

		for (unsigned int lat = 0; lat < latitudes.size(); lat++ )
		{
			if ( latitudes[lat] < gridMinLat_) 
				continue;
			if ( latitudes[lat] > gridMaxLat_) 
				continue;
			double lon = max_longitude_ - ((max_longitude_-min_longitude_)*.1);
			UserPoint point(lon,latitudes[lat]);
			PaperPoint xy = (*this)(point);
			if ( !in(xy) ) continue;
			Text *text = new Text();
			label.add(text);
			text->setText(writeLatitude(point));
			text->push_back(xy);
			text->setJustification(MRIGHT);
			text->setVerticalAlign(MHALF);
			text->setBlanking(true);
		}
	}
	else {
		double x = max_pcx_ - ((max_pcx_-min_pcx_)*.1);
		// we calculate the intersection of the longitudes with the left side
		verticalLabels(label, min_pcx_, x, MRIGHT);
	}
}

void Proj4Projection::labels(const LabelPlotting& label, RightAxisVisitor& visitor)  const
{
	if ( projection_->method_ == "simple"  ) {
		const vector<double>& latitudes = label.latitudes();
		for (unsigned int lat = 0; lat < latitudes.size(); lat++ )
		{
			if ( latitudes[lat] < gridMinLat_) 
				continue;
			if ( latitudes[lat] > gridMaxLat_) 
				continue;
			double lon = min_longitude_ + ((max_longitude_-min_longitude_)*.1);
			UserPoint point(lon,latitudes[lat]);
			PaperPoint xy = (*this)(point);
			if ( !in(xy) ) continue;
			Text *text = new Text();
			label.add(text);
			text->setText(writeLatitude(point));
			text->push_back(xy);
			text->setJustification(MLEFT);
			text->setVerticalAlign(MHALF);
			text->setBlanking(true);
		}
	}
	else {
		// we calculate the intersection of the longitudes with the right side
		double x = min_pcx_ + ((max_pcx_-min_pcx_)*.1);
		verticalLabels(label, max_pcx_, x, MLEFT);
	}
}

void Proj4Projection::labels(const LabelPlotting& label, BottomAxisVisitor& visitor)  const
{
	if ( projection_->method_ == "simple"  ) {
		const vector<double>& longitudes = label.longitudes();
		const double lat = min_latitude_ + (max_latitude_-min_latitude_)*.8;
		for (unsigned int lon = 0; lon < longitudes.size(); lon++ )
		{
			
			if ( longitudes[lon] < gridMinLon_) 
				continue;
			if ( longitudes[lon] > gridMaxLon_) 
				continue;
			UserPoint point(longitudes[lon],lat);
			PaperPoint xy = (*this)(point);
			if ( !in(xy) ) continue;
			Text *text = new Text();
			label.add(text);
			text->setText(writeLongitude(point));
			
			text->push_back(xy);
			text->setJustification(MCENTRE);
			text->setVerticalAlign(MTOP);
			text->setBlanking(true);
		}
	}
	else {
			// we calculate the intersection of the longitudes with the right side
		double y = min_pcy_ + ((max_pcy_-min_pcy_)*.8);
		horizontalLabels(label, min_pcy_, y, MTOP);
	}
}

inline double CA(PaperPoint& p1, PaperPoint& p2)
{
    return (p2.x() - p1.x()) ? (p2.y() - p1.y())/(p2.x() - p1.x()) : 0;
}

inline double CB(double a, PaperPoint& p)
{
    return p.y() - a * p.x();
}

inline double CX(double a, double b, double y)
{
    return (a) ? (y - b)/a : 0;
}

inline double CY(double a, double b, double x)
{
    return (a * x) + b;
}

inline bool between(double x, double x1, double x2)
{
	return ( std::min(x1, x2) <= x && x <= std::max(x1, x2) );
}

void Proj4Projection::verticalLabels(const LabelPlotting& label, double x, double pos, Justification justif)  const
{
    const vector<double>& longitudes = label.longitudes();
    for (vector<double>::const_iterator lon = longitudes.begin(); lon != longitudes.end(); ++lon)
    {
        // find the equation of the line using 2 points : lon/-20 -->lon/ +20
    	for ( double lat1 = -90, lat2 = -80; lat2 < 90; lat1+=10, lat2+=10) {
    		UserPoint geo1(*lon, lat1);
    		UserPoint geo2(*lon, lat2);
    		PaperPoint xy1 = (*this)(geo1);
    		PaperPoint xy2 = (*this)(geo2);
    		if ( between(x, xy1.x_, xy2.x_) ) {
    			double a = CA(xy1, xy2);
    			double b = CB(a, xy1);
    			PaperPoint xy(x, CY(a, b, x));
    			if ( !in(xy) ) continue;
    			UserPoint geo;
    	        revert(xy, geo);
    	        xy.x(pos);
    			if ( !same(geo.x(),*lon ) ) continue;
    			Text* text = new Text();
    			label.add(text);
    			text->setJustification(justif);
    			text->setVerticalAlign(MHALF);
    		    text->setText(writeLongitude(geo));
    		    text->push_back(xy);
    		}
    	}
    }
}

void Proj4Projection::horizontalLabels(const LabelPlotting& label, double y, double pos, VerticalAlign align)  const
{
	const vector<double>& longitudes = label.longitudes();
	for (vector<double>::const_iterator lon = longitudes.begin(); lon != longitudes.end(); ++lon) {
	    // find the equation of the line using 2 points : lon/-20 -->lon/ +20
		for ( double lat1 = -90, lat2 = -80; lat2 < 90; lat1+=10, lat2+=10) {
			UserPoint geo1(*lon, lat1);
			UserPoint geo2(*lon, lat2);
			PaperPoint xy1 = (*this)(geo1);
			PaperPoint xy2 = (*this)(geo2);
			if ( between(y, xy1.y_, xy2.y_) ) {
				double a = CA(xy1, xy2);
				double b = CB(a, xy1);
				PaperPoint xy(CX(a, b, y), y);
				if ( !in(xy) ) continue;
	        	UserPoint geo;
	        	revert(xy, geo);
	        	xy.y(pos);
	        	if ( !same(geo.x(), *lon ) ) continue;
	        	Text* text = new Text();
	        	label.add(text);
	        	text->setJustification(MCENTRE);
	        	text->setVerticalAlign(align);
	        	text->setText(writeLongitude(geo));
	        	text->push_back(xy);
			}
		}
	}
}

void Proj4Projection::labels(const LabelPlotting& label, TopAxisVisitor& visitor)  const
{
	if ( projection_->method_ == "simple" ) {
		const vector<double>& longitudes = label.longitudes();
		const double lat = min_latitude_ + (max_latitude_-min_latitude_)*.2;
		for (unsigned int lon = 0; lon < longitudes.size(); lon++ )
		{
			if ( longitudes[lon] < gridMinLon_) 
				continue;
			if ( longitudes[lon] > gridMaxLon_) 
				continue;
			UserPoint point(longitudes[lon],lat);
			PaperPoint xy = (*this)(point);
			if ( !in(xy) ) continue;
			Text *text = new Text();
			label.add(text);
			text->setText(writeLongitude(point));
			text->push_back(xy);
			text->setJustification(MCENTRE);
			text->setVerticalAlign(MBOTTOM);
			text->setBlanking(true);
		}
	}
	else {
		// we calculate the intersection of the longitudes with the right side
		double y = min_pcy_ + ((max_pcy_-min_pcy_)*.2);
		horizontalLabels(label, max_pcy_, y, MBOTTOM);
	}
}

void Proj4Projection::reprojectComponents(double& x, double& y, pair<double, double>& components) const
{
	const double speed = sqrt((components.first * components.first) + (components.second * components.second));
	const double angle = atan2(components.second,components.first);
	double ppx=x+cos(angle);
	double ppy=y+sin(angle);

	fast_reproject(ppx, ppy);
	fast_reproject(x, y);

	const double rotation = atan2((ppy - y), (ppx - x));

	// we the angle and the spped we compute u/v...
	components.first  = speed * cos(rotation);
	components.second = speed * sin(rotation);
}

void myprint(double x, double y, bool next = false) 
{
	
	MagLog::dev() << "[" << x << ", " << y << "]";
	if ( next )
		MagLog::dev() << "--->";
	else 
		MagLog::dev() << endl;
}

void Proj4Projection::reprojectSpeedDirection(const PaperPoint& point, pair<double, double>& wind) const
{
	double x = point.x_;
	double y =  point.y_;

	double u = x + (  sin( wind.second*DEG_TO_RAD) );
	double v = y + (  cos( wind.second*DEG_TO_RAD) );

	fast_reproject(x, y);
	fast_reproject(u, v);
	
	double rotation = atan2((u - x), (v - y));
	
	wind.second =   (rotation*RAD_TO_DEG);
	
}

void Proj4Projection::revert(const vector< std::pair<double, double> > & in, vector< std::pair<double, double> > & out) const
{
	const_cast<Proj4Projection*>(this)->init();
	out.reserve(in.size());
	for ( vector< std::pair<double, double> >::const_iterator pt = in.begin();  pt != in.end(); ++pt) {
		  double x = pt->first;
		  double y = pt->second;
		  PaperPoint p(x, y);

		  if ( PCEnveloppe_->within(p) == false ) {
				  out.push_back(make_pair(-1000, -1000));
			  continue;
		  }

		  int error =  pj_transform(to_, from_, 1, 1, &x, &y, NULL );

		  if ( error  ) {
			  MagLog::error() << pj_strerrno(error) << " for " << pt->first << " " << pt->second << endl;
			  out.push_back(make_pair(-1000, -1000));
		  }
		  else {
			  double lon = x*RAD_TO_DEG;
			  if ( lon > gridMaxLon_ ) lon -= 360.;
			  else if ( lon < gridMinLon_ ) lon += 360.;
			  double lat = y*RAD_TO_DEG;
			  out.push_back(make_pair(lon, lat));
		  }
	}
}

void Proj4Projection::coastSetting(map<string, string>& setting, double abswidth, double absheight) const
{
	// work out the ratios of geographical to paper lengths
	//const double xratio = ( xpcmax_ - xpcmin_ ) / abswidth;
	//const double yratio = ( ypcmax_ - ypcmin_ ) / absheight;

	// choose the smallest (smaller ratio means more detail required)
	const double ratio = 10;

	std::string resol = "110m";
	if ( ratio < 100000 )  // highest resolution
	{
		resol = "10m";
	}
	else if ( ratio < 300000)   // medium resolution
	{
		resol = "50m";
	}
	resol = "110m";
	setting["resolution"]      = resol;
	setting["land"]       = resol + "/ne_" + resol + "_land";
	setting["ocean"]      = resol + "/ne_" + resol + "_ocean";
	setting["coast"]      = resol + "/ne_" + resol + "_coastline";
	setting["rivers"]     = resol + "/ne_" + resol + "_rivers_lake_centerlines";
	setting["boundaries"] = resol + "/ne_" + resol + "_admin_0_boundary_lines_land";
	setting["administrative_boundaries"] = resol + "/ne_" + resol + "_admin_1_states_provinces";

	MagLog::dev() << "GeoRectangularProjection::coastSetting[" << abswidth << ", " << absheight << "]->" <<  ratio << " resol: "<<resol<< endl;
}

void Proj4Projection::visit(MetaDataVisitor& visitor, 
	double left, double top, 
	double width, double height,
	double iwidth, double iheight)
{
	ostringstream java;
	double w = getMaxPCX() - getMinPCX();
	double h = getMaxPCY() - getMinPCY();
	java << "{";
	java << "\"name\" : \"proj4\",";
    java << "\"definition\" : \"" << definition_ <<  "\",";
    java << "\"proj4_definition\" : \"" << projection_->definition_ <<  "\",";
	java << "\"top\" : \"" << top <<  "\",";
	java << "\"left\" : \"" << left <<  "\",";
	java << "\"width\" : \"" << width <<  "\",";
	java << "\"height\" : \"" << height <<  "\",";
	java << "\"img_width\" : \"" << iwidth <<  "\",";
	java << "\"img_height\" : \"" << iheight <<  "\",";
	java << "\"pcxmin\" : \"" << getMinPCX() <<  "\",";
	java << "\"pcymin\" : \"" << getMinPCY() <<  "\",";
	java << "\"pcwidth\" : \"" << w <<  "\",";
	java << "\"pcheight\" : \"" << h <<  "\"";
	java << "}";
	visitor.add("projection", java.str());
	ostringstream wf;
	wf << (w/width)<< endl;
	wf << "0\n0\n";
	wf << -(h/height) << endl;
	wf << getMaxPCY() - (h/height)/2<< endl;
	wf <<  getMinPCX() +  (w/width)/ 2<< endl;
	visitor.add("world_file", wf.str());
}

MatrixHandler* Proj4Projection::prepareData(const AbstractMatrix& matrix) const {
	return new GeoBoxMatrixHandler(matrix, *this);
}

bool Proj4Projection::fast_reproject(double& x, double& y) const
{


	x *= DEG_TO_RAD;
	y *= DEG_TO_RAD;
	int error =  pj_transform(from_, to_, 1, 1, &x, &y, NULL );

	if ( error  ) {

			  MagLog::warning()  << pj_strerrno(error) << " for " << x << " " << y << endl;		
			  return false;	  
	}
	return true;
}

double Proj4Projection::patchDistance(double res) const {
	double x1 = 0;
	double y1 = 60;
	double x2 = 0;
	double y2 = 61;
	fast_reproject(x1, y1);
	fast_reproject(x2, y2);

	double degree = ((x1-x2) * (x1-x2)) + ((y1-y2) * (y1-y2));
	return 1000000000;
}

void  Proj4Projection::collect(MetaDataCollector& collector) const
{

	collector["Projection"] = definition_;
	collector["Proj4  Definition"] = projection_->definition();
}

void Proj4Projection::getNewDefinition(const UserPoint& ll, const UserPoint& ur, string& out) const
{
	map<string, string> def;
	def["subpage_map_projection"] = definition_;
	def["subpage_map_area_definition"] = "corners";
	def["subpage_lower_left_longitude"] = tostring(ll.x_);
	def["subpage_lower_left_latitude"] = tostring(ll.y_);
	def["subpage_upper_right_longitude"] = tostring(ur.x_);
	def["subpage_upper_right_latitude"] = tostring(ur.y_);
	::toxml(out, def);
	out = "{" + out + "}";
}

void Proj4Projection::setDefinition(const string& json)
{
	if (json.empty())
				return;

			MagJSon helper;
			helper.interpret(json);

			XmlNode node = **helper.tree_.firstElement();
			node.name("");
			set(node);
}
