#include "conversions.h"
#include <boost/numeric/conversion/cast.hpp>
#include <stdexcept>

#define SHORT(x) boost::numeric_cast< ::Ice::Short >(x)

namespace Slicer {
	std::string
	dateToString(const Ice::optional<::TMDb::Date> & in)
	{
		if (!in) {
			return std::string();
		}
		struct tm tm;
		memset(&tm, 0, sizeof(struct tm));
		tm.tm_mday = in->Day;
		tm.tm_mon = in->Month;
		tm.tm_year = in->Year;
		mktime(&tm);
		char buf[BUFSIZ];
		auto len = strftime(buf, BUFSIZ, "%Y-%m-%d", &tm);
		return std::string(buf, len);
	}

	IceUtil::Optional<::TMDb::Date>
	stringToDate(const std::string & in)
	{
		if (in.empty()) {
			return IceUtil::None;
		}
		struct tm tm;
		memset(&tm, 0, sizeof(struct tm));
		auto end = strptime(in.c_str(), "%Y-%m-%d", &tm);
		mktime(&tm);
		if (!end || *end) {
			throw std::runtime_error("Invalid date string: " + in);
		}
		return ::TMDb::Date { SHORT(1900 + tm.tm_year), SHORT(1 + tm.tm_mon), SHORT(tm.tm_mday) };
	}

}