/*
    This file is part of the kcal library.

    Copyright (c) 2001 Cornelius Schumacher <schumacher@kde.org>
    Copyright (c) 2007 David Jarvie <software@astrojar.org.uk>

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.
*/
/**
  @file
  This file is part of the API for handling calendar data and
  defines the Period class.

  @brief
  Represents a period of time.

  @author Cornelius Schumacher \<schumacher@kde.org\>
*/

#include "period.h"

#include <kdebug.h>
#include <klocalizedstring.h>

using namespace KCal;

//@cond PRIVATE
class KCal::Period::Private
{
  public:
    Private() : mHasDuration( false ) {}
    Private( const KDateTime &start, const KDateTime &end, bool hasDuration )
      : mStart( start ),
        mEnd( end ),
        mHasDuration( hasDuration )
    {}
    KDateTime mStart;    // period starting date/time
    KDateTime mEnd;      // period ending date/time
    bool mHasDuration;   // does period have a duration?
    bool mDailyDuration; // duration is defined as number of days, not seconds
};
//@endcond

Period::Period() : d( new KCal::Period::Private() )
{
}

Period::Period( const KDateTime &start, const KDateTime &end )
  : d( new KCal::Period::Private( start, end, false ) )
{
}

Period::Period( const KDateTime &start, const Duration &duration )
  : d( new KCal::Period::Private( start, duration.end( start ), true ) )
{
  d->mDailyDuration = duration.isDaily();
}

Period::Period( const Period &period )
  : d( new KCal::Period::Private( *period.d ) )
{
}

Period::~Period()
{
  delete d;
}

bool Period::operator<( const Period &other ) const
{
  return d->mStart < other.d->mStart;
}

bool Period::operator==( const Period &other ) const
{
  return
    d->mStart == other.d->mStart &&
    d->mEnd == other.d->mEnd &&
    d->mHasDuration == other.d->mHasDuration;
}

Period &Period::operator=( const Period &other )
{
  // check for self assignment
  if ( &other == this ) {
    return *this;
  }

  *d = *other.d;
  return *this;
}

KDateTime Period::start() const
{
  return d->mStart;
}

KDateTime Period::end() const
{
  return d->mEnd;
}

Duration Period::duration() const
{
  if ( d->mHasDuration ) {
    return Duration( d->mStart, d->mEnd,
                     d->mDailyDuration ? Duration::Days : Duration::Seconds );
  } else {
    return Duration( d->mStart, d->mEnd );
  }
}

Duration Period::duration( Duration::Type type ) const
{
  return Duration( d->mStart, d->mEnd, type );
}

bool Period::hasDuration() const
{
  return d->mHasDuration;
}

void Period::shiftTimes( const KDateTime::Spec &oldSpec,
                         const KDateTime::Spec &newSpec )
{
  if ( oldSpec.isValid() && newSpec.isValid() && oldSpec != newSpec ) {
    d->mStart = d->mStart.toTimeSpec( oldSpec );
    d->mStart.setTimeSpec( newSpec );
    d->mEnd = d->mEnd.toTimeSpec( oldSpec );
    d->mEnd.setTimeSpec( newSpec );
  }
}