/******************************** LICENSE ********************************

 Copyright 2007 European Centre for Medium-Range Weather Forecasts (ECMWF)

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at 

    http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.

 ******************************** LICENSE ********************************/


/*! \file SpotDecoder.h
    \brief Implementation of the Template class SpotDecoder.
    
    Magics Team - ECMWF 2005
    
    Started: Mon 19-Sep-2005
    
    Changes:
    
*/
 


#include "EpsXmlInput.h"
#include "MetaData.h"
#include "CustomisedPoint.h"
#include "DateTime.h"
#include "TextVisitor.h"
#include "LegendVisitor.h"
#include "XmlReader.h"
#include "IntervalMap.h"

#include "Factory.h"
#include <locale>
#include <limits>

using namespace magics;

namespace magics
{

void EpsXmlInput::visit(Transformation& transformation)
{
	decode();
	
	transformation.setDataMinX((minstep_ - dateOffset_) * 3600, base_);
	
	transformation.setDataMaxX((maxstep_+dateOffset_) * 3600, base_);
	
	dateOffset_ = minstep_ - dateOffset_;
	
	transformation.setMinY(miny_);
	transformation.setMaxY(maxy_);
}
		
void EpsXmlInput::decode()
{
	if ( !points_.empty()) return;
	minstep_ =  std::numeric_limits<double>::max();
	maxstep_ =  std::numeric_limits<double>::min();
	miny_ =  std::numeric_limits<double>::max();;
	maxy_ =  std::numeric_limits<double>::min();;
		
	XmlReader parser(true);
	XmlTree tree;	

	try {
		parser.interpret(path_, &tree);		
		tree.visit(*this);
	}
	catch (MagicsException& e)
	{
		MagLog::debug() << e.what() << endl;
	}
}
  	
void EpsXmlInput::customisedPoints(const std::set<string>&, CustomisedPointsList& out)
{
	MagLog::dev() << "EpsXmlInput::customisedPoints-->need to be implemented" <<endl;
	MagLog::dev() << *this << endl;
	decode();

	for (vector<CustomisedPoint*>::iterator point = points_.begin(); point != points_.end(); ++point)
	{
		(**point)["step"] -= (dateOffset_* 3600);	
		out.push_back(*point);
	}
}


void EpsXmlInput::visit(TextVisitor& title)
{
	if ( !long_title_ && !short_title_) return;
	decode();
	if ( long_title_ )
	{
		ostringstream out;
		tm convert = base_;	
		locale loc("");      
		out.imbue(loc);   
		const std::time_put<char>& tfac = use_facet<time_put<char> >(loc); 
		string format = "Forecast %A %e %B %Y %H UTC";
		tfac.put(out, out, ' ', &convert, format.c_str(), format.c_str()+format.length()); 

		ostringstream line;
		GeoPoint position(longitude_, latitude_);
		line << station_ << "(" << position.writeLatitude() << ", " << position.writeLongitude() << ")" << endl;
		title.add(new TextEntry(title_));
		title.add(new TextEntry(line.str()));
		title.add(new TextEntry(out.str()));
	}
	if ( short_title_ )
	{
		title.add(new TextEntry(""));
		title.add(new TextEntry(parameter_));
	}
}

void EpsXmlInput::visit(MetaDataVisitor&)
{
}	

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

EpsXmlInput::EpsXmlInput():dateOffset_(6)
{
}

EpsXmlInput::~EpsXmlInput()
{
}

#define value(s) (tonumber(node.getAttribute(s))*scaling) + offset

void EpsXmlInput::visit(const XmlNode& node)
{
	MagLog::dev() << node.name() << endl;
	if ( node.name() == "forecast" )
	{
		Date date(node.getAttribute("date"));
		Time time(node.getAttribute("time"));
		station_ = node.getAttribute("station");
		title_ = node.getAttribute("title");
		latitude_ = tonumber(node.getAttribute("latitude"));
		longitude_ = tonumber(node.getAttribute("longitude"));
		base_ = DateTime(date, time);
		node.visit(*this);
	}

	static double scaling;
	static double offset;

	if ( node.name() == "param" && node.getAttribute("name") == param_ )
	{
		string s = node.getAttribute("scaling");
		parameter_ = node.getAttribute("title");
		scaling = (s.empty()) ? 1 :  tonumber(s);
		string o = node.getAttribute("offset");
		offset = (o.empty()) ? 0 :  tonumber(o);
		
		node.visit(*this);
	}

	if ( node.name() == "step" )
	{
		MagLog::dev() << node.getAttribute("value") << endl;
		double step = tonumber(node.getAttribute("value"));
		if ( step < minstep_) minstep_ = step;
		if ( step > maxstep_) maxstep_ = step;
		double min = value("min");
		double max = value("max");
		if ( min < miny_) miny_ = min;
		if ( max > maxy_) maxy_ = max;
		CustomisedPoint* point = new CustomisedPoint();						
		point->longitude(step * 3600);		
		//point->insert(make_pair("shift", dateOffset_*3600));		
		point->insert(make_pair("shift", 0 ));
		point->insert(make_pair("step", step* 3600));
		point->insert(make_pair("width", 1.5 * 3600));	

		point->insert(make_pair("year",  base_.date().year()));	
		point->insert(make_pair("month",  base_.date().month()));	
		point->insert(make_pair("day",  base_.date().day()));	
		point->insert(make_pair("hours",  base_.time().hours()));	
		point->insert(make_pair("minutes",  base_.time().minutes()));		    
		point->insert(make_pair("seconds",  base_.time().seconds()));	
		point->insert(make_pair("min", value("min")));	
		point->insert(make_pair("max", value("max")));	
		point->insert(make_pair("ten", value("ten")));	
		point->insert(make_pair("twentyfive", value("twentyfive")));	
		point->insert(make_pair("median", value("median")));	
		point->insert(make_pair("seventyfive", value("seventyfive")));	
		point->insert(make_pair("ninty", value("ninety")));
		if ( !node.getAttribute("forecast").empty() )
			point->insert(make_pair("forecast", value("forecast")));	
		if ( !node.getAttribute("control").empty() )
			point->insert(make_pair("control", value("control")));	

		points_.push_back(point);   	
	}
}
}
