/**
 * Copyright (c) 2012, OpenGeoSys Community (http://www.opengeosys.org)
 *            Distributed under a Modified BSD License.
 *              See accompanying file LICENSE.txt or
 *              http://www.opengeosys.com/LICENSE.txt
 *
 *
 * \file DateTools.cpp
 *
 * Created on 2010-06-16 by Karsten Rink
 */

#include "DateTools.h"
#include <cmath>
#include <cstdlib>
#include <iostream>

namespace BaseLib {

int date2int(int y, int m, int d)
{
	if ( (y < 1000 || y > 9999) || (m < 1 || m > 12) || (d < 1 || d > 31) )
	{
		std::cout << "Error: date2double() -- input not in expected format." << std::endl;
		return 0;
	}

	int ddate(0);
	ddate = y * 10000;
	ddate += (m * 100);
	ddate += d;

	return ddate;
}

std::string int2date(int date)
{
	if (date>10000000 && date<22000000)
	{
		int y = static_cast<int>(floor(date/10000.0));
		int m = static_cast<int>(floor((date-(y*10000))/100.0));
		int d = date-(y*10000)-(m*100);
		std::stringstream ss;
		if (d<10)
			ss << "0";
		ss << d << ".";
		if (m<10)
			ss << "0";
		ss << m << "." << y;
		return ss.str();
	}
	return "";
}

std::string date2string(double ddate)
{
	if (ddate < 10000101 || ddate > 99991231)
	{
		std::cout << "Error: date2String() -- input not in expected format." << std::endl;
		return "0.0.0000";
	}

	int rest (static_cast<int>(ddate));
	int y = static_cast<int>(floor(rest / 10000.0));
	rest = rest % (y * 10000);
	int m = static_cast<int>(floor(rest / 100.0));
	if (m < 1 || m > 12)
		std::cout << "Warning: date2String() -- month not in [1:12]" << std::endl;
	rest = rest % (m * 100);
	int d = rest;
	if (d < 1 || d > 31)
		std::cout << "Warning: date2String() -- day not in [1:31]" << std::endl;

	std::string day = number2str(d);
	if (d < 10)
		day = "0" + day;
	std::string month = number2str(m);
	if (m < 10)
		month = "0" + month;
	std::string s =  number2str(y) + "-" + month + "-" + day;
	return s;
}

int strDate2int(const std::string &s)
{
	std::string str(s);
	if (s.length() > 10)
		str = s.substr(0,10);
	size_t sep ( str.find(".",0) );
	int d ( atoi(str.substr(0, sep).c_str()) );
	size_t sep2 ( str.find(".", sep + 1) );
	int m ( atoi(str.substr(sep + 1,sep2 - (sep + 1)).c_str()) );
	int y ( atoi(str.substr(sep2 + 1, s.length() - (sep2 + 1)).c_str()) );
	return date2int(y, m, d);
}

int xmlDate2int(const std::string &s)
{
	if (s.length() == 10)
	{
		int d = atoi(s.substr(8,2).c_str());
		if (d < 1 || d > 31)
			std::cout << "Warning: xmlDate2double() -- day not in [1:31]" << std::endl;
		int m = atoi(s.substr(5,2).c_str());
		if (m < 1 || m > 12)
			std::cout << "Warning: xmlDate2double() -- month not in [1:12]" <<
			std::endl;
		int y = atoi(s.substr(0,4).c_str());
		return date2int(y, m, d);
	}
	return 0;
}

} // end namespace BaseLib