/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/*

 * This file is part of the LibreOffice project.

 *

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/.

 *

 * This file incorporates work covered by the following license notice:

 *

 *   Licensed to the Apache Software Foundation (ASF) under one or more

 *   contributor license agreements. See the NOTICE file distributed

 *   with this work for additional information regarding copyright

 *   ownership. The ASF licenses this file to you 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 .

 */

#ifndef INCLUDED_TOOLS_DATETIME_HXX

#define INCLUDED_TOOLS_DATETIME_HXX

#include <tools/toolsdllapi.h>

#include <tools/date.hxx>

#include <tools/time.hxx>

#include <com/sun/star/util/DateTime.hpp>

#include <ostream>

namespace tools

{

class Duration;

}

class SAL_WARN_UNUSED TOOLS_DLLPUBLIC DateTime : public Date, public tools::Time

{

public:

    enum DateTimeInitSystem

    {

        SYSTEM

    };

    enum DateTimeInitEmpty

    {

        EMPTY

    };

                    explicit DateTime( DateTimeInitEmpty ) : Date( Date::EMPTY ), Time( Time::EMPTY ) {}

                    explicit DateTime( DateTimeInitSystem );

                    DateTime( const DateTime& rDateTime ) :

                        Date( rDateTime ), Time( rDateTime ) {}

                    explicit DateTime( const Date& rDate ) : Date( rDate ), Time(Time::EMPTY) {}

                    explicit DateTime( const tools::Time& rTime ) : Date(0), Time( rTime ) {}

                    DateTime( const Date& rDate, const tools::Time& rTime ) :

                        Date( rDate ), Time( rTime ) {}

                    explicit DateTime( const css::util::DateTime& rDateTime );

    css::util::DateTime

                    GetUNODateTime() const

                        { return css::util::DateTime(GetNanoSec(), GetSec(), GetMin(), GetHour(),

                              GetDay(), GetMonth(), GetYear(), false); }

    bool            IsBetween( const DateTime& rFrom,

                               const DateTime& rTo ) const;

    bool            IsEqualIgnoreNanoSec( const DateTime& rDateTime ) const

                    {

                        if ( GetDate() != rDateTime.GetDate() )

                            return false;

                        return Time::IsEqualIgnoreNanoSec( rDateTime );

                    }

    auto            operator <=>( const DateTime& rDateTime ) const

                    {

                        return std::make_pair(GetDate(), GetTime()) <=>

                            std::make_pair(rDateTime.GetDate(), rDateTime.GetTime());

                    }

    bool            operator==(const DateTime& rDateTime) const

                    {

                        return (Date::operator==(rDateTime) && tools::Time::operator==(rDateTime));

                    }

    sal_Int64       GetSecFromDateTime( const Date& rDate ) const;

    void            ConvertToUTC()       { *this -= Time::GetUTCOffset(); }

    void            ConvertToLocalTime() { *this += Time::GetUTCOffset(); }

    void            AddTime( double fTimeInDays );

    DateTime&       operator +=( const tools::Time& rTime );

    DateTime&       operator -=( const tools::Time& rTime );

    /** Duration can be negative, so adding it will subtract its value. */

    DateTime&       operator +=( const tools::Duration& rDuration );

private:

    void            NormalizeTimeRemainderAndApply( tools::Time& rTime );

public:

    TOOLS_DLLPUBLIC friend DateTime operator +( const DateTime& rDateTime, sal_Int32 nDays );

    TOOLS_DLLPUBLIC friend DateTime operator -( const DateTime& rDateTime, sal_Int32 nDays );

    TOOLS_DLLPUBLIC friend DateTime operator +( const DateTime& rDateTime, double fTimeInDays );

    TOOLS_DLLPUBLIC friend DateTime operator -( const DateTime& rDateTime, double fTimeInDays )

                        { return operator+( rDateTime, -fTimeInDays ); }

    TOOLS_DLLPUBLIC friend DateTime operator +( const DateTime& rDateTime, const tools::Time& rTime );

    TOOLS_DLLPUBLIC friend DateTime operator -( const DateTime& rDateTime, const tools::Time& rTime );

    /** Use operator-() if a duration is to be remembered or processed. */

    TOOLS_DLLPUBLIC friend tools::Duration operator -( const DateTime& rDateTime1, const DateTime& rDateTime2 );

    /** Use Sub() if the floating point "time in days" value is to be

        processed. This also takes a shortcut for whole days values (equal

        times), and only for times inflicted values uses an intermediary

        tools::Duration for conversion. Note that the resulting floating point

        value nevertheless in many cases is not an exact representation down to

        nanoseconds. */

    static  double  Sub( const DateTime& rDateTime1, const DateTime& rDateTime2 );

    TOOLS_DLLPUBLIC friend sal_Int64 operator -( const DateTime& rDateTime, const Date& rDate )

                        { return static_cast<const Date&>(rDateTime) - rDate; }

    /** Duration can be negative, so adding it will subtract its value. */

    TOOLS_DLLPUBLIC friend DateTime operator +( const DateTime& rDateTime, const tools::Duration& rDuration );

    DateTime&       operator =( const DateTime& rDateTime );

    DateTime&       operator =( const css::util::DateTime& rUDateTime );

    void            GetWin32FileDateTime( sal_uInt32 & rLower, sal_uInt32 & rUpper ) const;

    static DateTime CreateFromWin32FileDateTime( sal_uInt32 rLower, sal_uInt32 rUpper );

    /// Creates DateTime given a unix time, which is the number of seconds

    /// elapsed since Jan 1st, 1970.

    static DateTime CreateFromUnixTime( const double fSecondsSinceEpoch );

};

inline DateTime& DateTime::operator =( const DateTime& rDateTime )

{

    Date::operator=( rDateTime );

    Time::operator=( rDateTime );

    return *this;

}

template< typename charT, typename traits >

inline std::basic_ostream<charT, traits> & operator <<(

    std::basic_ostream<charT, traits> & stream, const DateTime& datetime)

{

    stream << datetime.GetYear() << '-';

    stream.fill('0');

    stream.width(2);

    stream << datetime.GetMonth() << '-';

    stream.width(2);

    stream << datetime.GetDay() << ' ';

    stream.width(2);

    stream << datetime.GetHour() << ':';

    stream.width(2);

    stream << datetime.GetMin() << ':';

    stream.width(2);

    stream << datetime.GetSec() << ".";

    stream.width(9);

    return stream << datetime.GetNanoSec();

}

#endif

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