/*
    Copyright 2000-2009, Felspar Co Ltd. http://fost.3.felspar.com/
    Distributed under the Boost Software License, Version 1.0.
    See accompanying file LICENSE_1_0.txt or copy at
        http://www.boost.org/LICENSE_1_0.txt
*/


#include "fost-datetime.hpp"
#include <fost/detail/timestamp.hpp>
#include <boost/date_time/posix_time/posix_time.hpp>

#include <fost/exception/not_implemented.hpp>


using namespace fostlib;


fostlib::timestamp::timestamp() {
}
fostlib::timestamp::timestamp(boost::posix_time::ptime pt)
: m_ts(pt) {
}


timestamp fostlib::timestamp::now() {
    return boost::posix_time::microsec_clock::universal_time();
}


bool fostlib::timestamp::operator == ( const timestamp &ts ) const {
    return m_ts == ts.m_ts;
}

bool fostlib::timestamp::operator !=( const timestamp &ts ) const {
    return m_ts != ts.m_ts;
}


string fostlib::coercer< string, timestamp >::coerce( timestamp t ) {
    std::string s = boost::posix_time::to_iso_extended_string(fostlib::coerce< boost::posix_time::ptime >(t));
    s[10] = ' ';
    return fostlib::coerce< string >(fostlib::coerce< ascii_string >(s));
}
rfc1123_timestamp fostlib::coercer< rfc1123_timestamp, timestamp >::coerce( timestamp t ) {
    boost::posix_time::ptime ts = fostlib::coerce< boost::posix_time::ptime >(t);
    std::stringstream ss;
    ss.imbue(std::locale(ss.getloc(), new boost::posix_time::time_facet("%a, %d %b %Y %H:%M:%S +0000")));
    ss << ts;
    return rfc1123_timestamp(ascii_string(ss.str()));
}

timestamp fostlib::coercer< timestamp, json >::coerce( const json &j ) {
    nullable< string > s( j.get< string >() );
    if ( s.isnull() )
        throw exceptions::not_implemented(L"fostlib::coercer< timestamp, json >::coerce( const json &j ) -- where the JSON is not a string");
    return timestamp( boost::posix_time::time_from_string( fostlib::coerce< ascii_string >( s.value() ).underlying() ) );
}