/*
    This file is part of the kcal library.

    Copyright (c) 2003 Cornelius Schumacher <schumacher@kde.org>
    Copyright (C) 2005 Reinhold Kainhofer <reinhold@kainhofe.com>

    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.
*/

#include "kcal/calendarlocal.h"

#include <kaboutdata.h>
#include <kcomponentdata.h>
#include <kdebug.h>
#include <kcmdlineargs.h>
#include <ksystemtimezone.h>

#include <QtCore/QFile>
#include <QtCore/QTextStream>



using namespace KCal;

static QString dumpTime( const KDateTime &dt, const KDateTime::Spec &viewSpec );


int main( int argc, char **argv )
{
  KAboutData aboutData( "testrecurrencenew", 0, ki18n("Load recurrence rules with the new class and print out debug messages"), "0.1" );
  KCmdLineArgs::init( argc, argv, &aboutData );

  KCmdLineOptions options;
  options.add("verbose", ki18n("Verbose output"));
  options.add("+input", ki18n("Name of input file"));
  options.add("[+output]", ki18n("optional name of output file for the recurrence dates"));
  KCmdLineArgs::addCmdLineOptions( options );

  KComponentData componentData( &aboutData );
  //QCoreApplication app( KCmdLineArgs::qtArgc(), KCmdLineArgs::qtArgv() );

  KCmdLineArgs *args = KCmdLineArgs::parsedArgs();

  if ( args->count() < 1 ) {
    args->usage( "Wrong number of arguments." );
  }

  QString input = args->arg( 0 );
  kDebug() << "Input file:" << input;

  QTextStream *outstream;
  outstream = 0;
  QString fn("");
  if ( args->count() > 1 ) {
    fn = args->arg( 1 );
    kDebug() << "We have a file name given:" << fn;
  }
  QFile outfile( fn );
  if ( !fn.isEmpty() && outfile.open( QIODevice::WriteOnly ) ) {
    kDebug() << "Opened output file!!!";
    outstream = new QTextStream( &outfile );
  }

  CalendarLocal cal( KDateTime::UTC );

  KDateTime::Spec viewSpec;
  if ( !cal.load( input ) ) return 1;
  QString tz = cal.nonKDECustomProperty( "X-LibKCal-Testsuite-OutTZ" );
  if ( !tz.isEmpty() ) {
    viewSpec = KDateTime::Spec( KSystemTimeZones::zone( tz ) );
  }

  Incidence::List inc = cal.incidences();

  for ( Incidence::List::Iterator it = inc.begin(); it != inc.end(); ++it ) {
    Incidence *incidence = *it;
    kDebug() << "*+*+*+*+*+*+*+*+*+*";
    kDebug() << " ->" << incidence->summary() << "<-";

    incidence->recurrence()->dump();

    KDateTime dt( incidence->recurrence()->endDateTime() );
    int i=0;
    if ( outstream ) {
      if ( !dt.isValid() ) {
        if ( viewSpec.isValid() ) {
          dt = KDateTime( QDate( 2011, 1, 1 ), QTime( 0, 0, 1 ), viewSpec );
        } else {
          dt = KDateTime( QDate( 2011, 1, 1 ), QTime( 0, 0, 1 ) );
        }
      }
      else dt = dt.addYears( 2 );
      kDebug() << "-------------------------------------------";
      kDebug() << " *~*~*~*~ Starting with date:" << dumpTime(dt, viewSpec);
      // Output to file for testing purposes
      while (dt.isValid() && i<500 ) {
        ++i;
        dt = incidence->recurrence()->getPreviousDateTime( dt );
        if ( dt.isValid() )
          (*outstream) << dumpTime(dt, viewSpec) << endl;
      }
    } else {
      if ( !dt.isValid() ) dt = KDateTime( QDate( 2005, 7, 31 ), QTime( 23, 59, 59 ), KDateTime::Spec::UTC() );
      else dt = dt.addYears( 2 );
      incidence->recurrence()->dump();
      kDebug() << "-------------------------------------------";
      kDebug() << " *~*~*~*~ Starting with date:" << dumpTime(dt, viewSpec);
      // Output to konsole
      while ( dt.isValid() && i<50 ) {
        ++i;
        kDebug() << "-------------------------------------------";
        dt = incidence->recurrence()->getPreviousDateTime( dt );
        if ( dt.isValid() )
          kDebug() << " *~*~*~*~ Previous date is:" << dumpTime(dt, viewSpec);
      }
    }
  }

  delete outstream;
  outfile.close();
  return 0;
}


QString dumpTime( const KDateTime &dt, const KDateTime::Spec &viewSpec )
{
  if ( !dt.isValid() )
    return QString();
  KDateTime vdt = viewSpec.isValid() ? dt.toTimeSpec( viewSpec ) : dt;
  QString format;
#ifdef FLOAT_IS_DATE_ONLY
  if ( vdt.isDateOnly() )
    format = QLatin1String( "%Y-%m-%d" );
  else
#endif
    format = QLatin1String( "%Y-%m-%dT%H:%M:%S" );
  if ( vdt.isSecondOccurrence() )
    format += QLatin1String( " %Z" );
  if ( vdt.timeSpec() != KDateTime::ClockTime)
    format += QLatin1String( " %:Z" );
  return vdt.toString( format );
}