/*
 * Copyright (c) 2011-2019 Isode Limited.
 * All rights reserved.
 * See the COPYING file for more information.
 */

#include <Swiften/Base/DateTime.h>

#include <locale>

#include <boost/date_time/c_local_time_adjustor.hpp>
#include <boost/date_time/local_time/local_time.hpp>
#include <boost/date_time/posix_time/posix_time.hpp>
#include <boost/date_time/time_facet.hpp>

#include <Swiften/Base/Log.h>
#include <Swiften/Base/String.h>

namespace Swift {

boost::posix_time::ptime stringToDateTime(const std::string& string) {
    static std::locale locale(std::locale::classic(), new boost::local_time::local_time_input_facet("%Y-%m-%d %H:%M:%S%F%ZP"));
    std::istringstream stream(string);
    stream.imbue(locale);
    boost::local_time::local_date_time result(boost::date_time::not_a_date_time);
    stream >> result;
    return result.utc_time();
}

std::string dateTimeToString(const boost::posix_time::ptime& time) {
    std::string stampString = std::string(boost::posix_time::to_iso_extended_string(time));
    String::replaceAll(stampString, ',', ".");
    stampString += "Z";
    return stampString;
}

std::string dateTimeToLocalString(const boost::posix_time::ptime& time) {
    std::string localString;
    try {
        localString = boost::posix_time::to_simple_string(boost::date_time::c_local_adjustor<boost::posix_time::ptime>::utc_to_local(time));
    }
    catch(std::out_of_range& exception) {
        SWIFT_LOG(debug) << exception.what();
    }
    return localString;
}

}