/*
  Copyright (c) 2010 Bertjan Broeksema <broeksema@kde.org>
  Copyright (c) 2010 Klarälvdalens Datakonsult AB, a KDAB Group company <info@kdab.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 "incidencedatetime.h"
#ifdef KDEPIM_MOBILE_UI
#include "ui_dialogmobile.h"
#include "ui_dialogmoremobile.h"
#else
#include "ui_dialogdesktop.h"
#endif
//#ifdef KDEPIM_MOBILE_UI
//#include "ui_iedatetimemobile.h"
//#else
//#include "../editoralarms.h"
//#include "ui_incidencedatetime.h"
//#endif

#include <calendarsupport/kcalprefs.h>

#include <KCalCore/ICalTimeZones>
#include <KCalUtils/IncidenceFormatter>

#include <KDebug>
#include <KSystemTimeZone>

using namespace IncidenceEditorNG;

/**
 * Returns true if the incidence's dates are equal to the default ones specified in config.
 */
static bool incidenceHasDefaultTimes( const KCalCore::Incidence::Ptr &incidence )
{
  if ( !incidence || incidence->allDay() ) {
    return false;
  }

  QTime defaultDuration = CalendarSupport::KCalPrefs::instance()->defaultDuration().time();
  if ( !defaultDuration.isValid() ) {
    return false;
  }

  QTime defaultStart = CalendarSupport::KCalPrefs::instance()->mStartTime.time();
  if ( !defaultStart.isValid() ) {
    return false;
  }

  if ( incidence->dtStart().time() == defaultStart ) {
    if ( incidence->type() == KCalCore::Incidence::TypeJournal ) {
      return true; // no duration to compare with
    }

    const KDateTime start = incidence->dtStart();
    const KDateTime end   = incidence->dateTime( KCalCore::Incidence::RoleEnd );
    if ( !end.isValid() || !start.isValid() ) {
      return false;
    }

    const int durationInSeconds = defaultDuration.hour() * 3600 + defaultDuration.minute() * 60;
    return start.secsTo( end ) == durationInSeconds;
  }

  return false;
}

IncidenceDateTime::IncidenceDateTime( Ui::EventOrTodoDesktop *ui )
  : IncidenceEditor( 0 ), mTimeZones( new KCalCore::ICalTimeZones ), mUi( ui ),
    mTimezoneCombosWereVisibile( false )
{
  setTimeZonesVisibility( false );
  setObjectName( "IncidenceDateTime" );

#ifdef KDEPIM_MOBILE_UI
  Q_UNUSED(mTimezoneCombosWereVisibile);
  mUi->mTimeZoneComboStart->setVisible( false );
  mUi->mTimeZoneComboEnd->setVisible( false );

  // We don't want to see the combobox list / calendar in the mobile version
  mUi->mStartDateEdit->setOptions( mUi->mStartDateEdit->options() & ~KDateComboBox::EditDate );
  mUi->mEndDateEdit->setOptions( mUi->mEndDateEdit->options() & ~KDateComboBox::EditDate );
  mUi->mStartTimeEdit->clear();
  mUi->mEndTimeEdit->clear();

  // This event filter is not needed in the desktop version
  mUi->mStartDateEdit->installEventFilter( this );
  mUi->mEndDateEdit->installEventFilter( this );
  mUi->mStartTimeEdit->installEventFilter( this );
  mUi->mEndTimeEdit->installEventFilter( this );
#else
  mUi->mTimeZoneLabel->setVisible( !mUi->mWholeDayCheck->isChecked() );
  mUi->mTimeZoneLabel->setContextMenuPolicy(Qt::NoContextMenu);
  connect( mUi->mTimeZoneLabel, SIGNAL(linkActivated(QString)),
           SLOT(toggleTimeZoneVisibility()) );
#endif

  QList<QLineEdit*> lineEdits;
  lineEdits << mUi->mStartDateEdit->lineEdit() << mUi->mEndDateEdit->lineEdit()
            << mUi->mStartTimeEdit->lineEdit() << mUi->mEndTimeEdit->lineEdit();
  foreach ( QLineEdit *lineEdit, lineEdits ) {
    KLineEdit *klineEdit = qobject_cast<KLineEdit*>( lineEdit );
    if ( klineEdit ) {
      klineEdit->setClearButtonShown( false );
    }
  }

  connect( mUi->mFreeBusyCheck, SIGNAL(toggled(bool)), SLOT(checkDirtyStatus()) );
  connect( mUi->mWholeDayCheck, SIGNAL(toggled(bool)), SLOT(enableTimeEdits()) );
  connect( mUi->mWholeDayCheck, SIGNAL(toggled(bool)), SLOT(checkDirtyStatus()) );

  connect( this, SIGNAL(startDateChanged(QDate)), SLOT(updateStartToolTips()) );
  connect( this, SIGNAL(startTimeChanged(QTime)), SLOT(updateStartToolTips()) );
  connect( this, SIGNAL(endDateChanged(QDate)), SLOT(updateEndToolTips()) );
  connect( this, SIGNAL(endTimeChanged(QTime)), SLOT(updateEndToolTips()) );
  connect( mUi->mWholeDayCheck, SIGNAL(toggled(bool)), SLOT(updateStartToolTips()) );
  connect( mUi->mWholeDayCheck, SIGNAL(toggled(bool)), SLOT(updateEndToolTips()) );
  connect( mUi->mStartCheck, SIGNAL(toggled(bool)), SLOT(updateStartToolTips()) );
  connect( mUi->mEndCheck, SIGNAL(toggled(bool)), SLOT(updateEndToolTips()) );
}

IncidenceDateTime::~IncidenceDateTime()
{
  delete mTimeZones;
}

bool IncidenceDateTime::eventFilter( QObject *obj, QEvent *event )
{
  if ( event->type() == QEvent::FocusIn ) {
    if ( obj == mUi->mStartDateEdit ) {
      kDebug() << "emiting startDateTime: " << mUi->mStartDateEdit;
      emit startDateFocus( obj );
    } else if ( obj == mUi->mEndDateEdit ) {
      kDebug() << "emiting endDateTime: " << mUi->mEndDateEdit;
      emit endDateFocus( obj );
    } else if ( obj == mUi->mStartTimeEdit ) {
      kDebug() << "emiting startTimeTime: " << mUi->mStartTimeEdit;
      emit startTimeFocus( obj );
    } else if ( obj == mUi->mEndTimeEdit ) {
      kDebug() << "emiting endTimeTime: " << mUi->mEndTimeEdit;
      emit endTimeFocus( obj );
    }

    return true;
  } else {
    // standard event processing
    return QObject::eventFilter( obj, event );
  }
}

void IncidenceDateTime::load( const KCalCore::Incidence::Ptr &incidence )
{
  if ( mLoadedIncidence && *mLoadedIncidence == *incidence ) {
    return;
  }

  const bool isTemplate             = incidence->customProperty( "kdepim", "isTemplate" ) == "true";
  const bool templateOverridesTimes = incidenceHasDefaultTimes( mLoadedIncidence );

  mLoadedIncidence = incidence;
  mLoadingIncidence = true;

  // We can only handle events or todos.
  if ( KCalCore::Todo::Ptr todo = IncidenceDateTime::incidence<KCalCore::Todo>() ) {
    load( todo, isTemplate, templateOverridesTimes );
  } else if ( KCalCore::Event::Ptr event = IncidenceDateTime::incidence<KCalCore::Event>() ) {
    load( event, isTemplate, templateOverridesTimes );
  } else if ( KCalCore::Journal::Ptr journal = IncidenceDateTime::incidence<KCalCore::Journal>() ) {
    load( journal, isTemplate, templateOverridesTimes );
  } else {
    kDebug() << "Not an Incidence.";
  }

  // Set the initial times before calling enableTimeEdits, as enableTimeEdits
  // assumes that the initial times are initialized.
  mInitialStartDT = currentStartDateTime();
  mInitialEndDT = currentEndDateTime();

  enableTimeEdits();

  if ( mUi->mTimeZoneComboStart->currentIndex() == 0 ) { // Floating
    mInitialStartDT.setTimeSpec( mInitialStartDT.toLocalZone().timeSpec() );
  }

  if ( mUi->mTimeZoneComboEnd->currentIndex() == 0 ) { // Floating
    mInitialEndDT.setTimeSpec( mInitialEndDT.toLocalZone().timeSpec() );
  }

  mWasDirty = false;
  mLoadingIncidence = false;
}

void IncidenceDateTime::save( const KCalCore::Incidence::Ptr &incidence )
{
  if ( KCalCore::Todo::Ptr todo =
       IncidenceDateTime::incidence<KCalCore::Todo>( incidence ) ) {
    save( todo );
  } else if ( KCalCore::Event::Ptr event =
              IncidenceDateTime::incidence<KCalCore::Event>( incidence ) ) {
    save( event );
  } else if ( KCalCore::Journal::Ptr journal =
              IncidenceDateTime::incidence<KCalCore::Journal>( incidence ) ) {
    save( journal );
  } else {
    Q_ASSERT_X( false, "IncidenceDateTimeEditor::save",
                "Only implemented for todos, events and journals" );
  }
}

bool IncidenceDateTime::isDirty() const
{
  if ( KCalCore::Todo::Ptr todo = IncidenceDateTime::incidence<KCalCore::Todo>() ) {
    return isDirty( todo );
  } else if ( KCalCore::Event::Ptr event = IncidenceDateTime::incidence<KCalCore::Event>() ) {
    return isDirty( event );
  } else if ( KCalCore::Journal::Ptr journal = IncidenceDateTime::incidence<KCalCore::Journal>() ) {
    return isDirty( journal );
  } else {
    Q_ASSERT_X( false, "IncidenceDateTimeEditor::isDirty",
                "Only implemented for todos and events" );
    return false;
  }
}

void IncidenceDateTime::setActiveDate( const QDate &activeDate )
{
  mActiveDate = activeDate;
}

QDate IncidenceDateTime::startDate() const
{
  return currentStartDateTime().date();
}

QDate IncidenceDateTime::endDate() const
{
  return currentEndDateTime().date();
}

QTime IncidenceDateTime::startTime() const
{
  return currentStartDateTime().time();
}

QTime IncidenceDateTime::endTime() const
{
  return currentEndDateTime().time();
}

/// private slots for General

void IncidenceDateTime::setTimeZonesVisibility( bool visible )
{
#ifndef KDEPIM_MOBILE_UI
  static const QString tz( i18nc( "@action show or hide the time zone widgets", "Time zones" ) );
  QString placeholder( "<a href=\"hide\"><font color='blue'>&lt;&lt; %1</font></a>" );
  if ( visible ) {
    placeholder = placeholder.arg( tz );
  } else {
    placeholder = QString( "<a href=\"show\"><font color='blue'>%1 &gt;&gt;</font></a>" );
    placeholder = placeholder.arg( tz );
  }
  mUi->mTimeZoneLabel->setText( placeholder );
#endif

  mUi->mTimeZoneComboStart->setVisible( visible );
  mUi->mTimeZoneComboEnd->setVisible( visible && type() != KCalCore::Incidence::TypeJournal );
}

void IncidenceDateTime::toggleTimeZoneVisibility()
{
  setTimeZonesVisibility( !mUi->mTimeZoneComboStart->isVisible() );
}

void IncidenceDateTime::updateStartTime( const QTime &newTime )
{
  if ( !newTime.isValid() ) {
    return;
  }

  KDateTime endDateTime = currentEndDateTime();
  const int secsep = mCurrentStartDateTime.secsTo( endDateTime );
  mCurrentStartDateTime.setTime( newTime );
  if ( mUi->mEndCheck->isChecked() ) {
    // Only update the end time when it is actually enabled, adjust end time so
    // that the event/todo has the same duration as before.
    endDateTime = mCurrentStartDateTime.addSecs( secsep );
    mUi->mEndTimeEdit->setTime( endDateTime.time() );
    mUi->mEndDateEdit->setDate( endDateTime.date() );
  }

  emit startTimeChanged( mCurrentStartDateTime.time() );
  checkDirtyStatus();
}

void IncidenceDateTime::updateStartDate( const QDate &newDate )
{
  if ( !newDate.isValid() ) {
    return;
  }

  const bool dateChanged = mCurrentStartDateTime.date().day() != newDate.day() ||
                           mCurrentStartDateTime.date().month() != newDate.month();

  KDateTime endDateTime = currentEndDateTime();
  int daysep = mCurrentStartDateTime.daysTo( endDateTime );
  mCurrentStartDateTime.setDate( newDate );
  if ( mUi->mEndCheck->isChecked() ) {
    // Only update the end time when it is actually enabled, adjust end time so
    // that the event/todo has the same duration as before.
    endDateTime.setDate( mCurrentStartDateTime.date().addDays( daysep ) );
    mUi->mEndDateEdit->setDate( endDateTime.date() );
  }

  checkDirtyStatus();

  if ( dateChanged ) {
    emit startDateChanged( mCurrentStartDateTime.date() );
  }
}

void IncidenceDateTime::updateStartSpec()
{
  const QDate prevDate = mCurrentStartDateTime.date();

  if ( mUi->mEndCheck->isChecked() &&
       currentEndDateTime().timeSpec() == mCurrentStartDateTime.timeSpec() ) {
    mUi->mTimeZoneComboEnd->selectTimeSpec( mUi->mTimeZoneComboStart->selectedTimeSpec() );
  }

  mCurrentStartDateTime.setTimeSpec( mUi->mTimeZoneComboStart->selectedTimeSpec() );

  const bool dateChanged = mCurrentStartDateTime.date().day() != prevDate.day() ||
                           mCurrentStartDateTime.date().month() != prevDate.month();

  if ( dateChanged ) {
    emit startDateChanged( mCurrentStartDateTime.date() );
  }

  if ( type() == KCalCore::Incidence::TypeJournal ) {
    checkDirtyStatus();
  }
}

/// private slots for Todo

void IncidenceDateTime::enableStartEdit( bool enable )
{
  mUi->mStartDateEdit->setEnabled( enable );

  if ( mUi->mEndCheck->isChecked() || mUi->mStartCheck->isChecked() ) {
    mUi->mWholeDayCheck->setEnabled( true );
    setTimeZoneLabelEnabled( !mUi->mWholeDayCheck->isChecked() );
  } else {
    mUi->mWholeDayCheck->setEnabled( false );
    mUi->mWholeDayCheck->setChecked( false );
    setTimeZoneLabelEnabled( false );
  }

  if ( enable ) {
    mUi->mStartTimeEdit->setEnabled( !mUi->mWholeDayCheck->isChecked() );
    mUi->mTimeZoneComboStart->setEnabled( !mUi->mWholeDayCheck->isChecked() );
  } else {
    mUi->mStartTimeEdit->setEnabled( false );
    mUi->mTimeZoneComboStart->setEnabled( false );
  }

  mUi->mTimeZoneComboStart->setFloating( !mUi->mTimeZoneComboStart->isEnabled() );
  checkDirtyStatus();
}

void IncidenceDateTime::enableEndEdit( bool enable )
{
  mUi->mEndDateEdit->setEnabled( enable );

  if( mUi->mEndCheck->isChecked() || mUi->mStartCheck->isChecked() ) {
    mUi->mWholeDayCheck->setEnabled( true );
    setTimeZoneLabelEnabled( !mUi->mWholeDayCheck->isChecked() );
  } else {
    mUi->mWholeDayCheck->setEnabled( false );
    mUi->mWholeDayCheck->setChecked( false );
    setTimeZoneLabelEnabled( false );
  }

  if ( enable ) {
    mUi->mEndTimeEdit->setEnabled( !mUi->mWholeDayCheck->isChecked() );
    mUi->mTimeZoneComboEnd->setEnabled( !mUi->mWholeDayCheck->isChecked() );
  } else {
    mUi->mEndTimeEdit->setEnabled( false );
    mUi->mTimeZoneComboEnd->setEnabled( false );
  }

  mUi->mTimeZoneComboEnd->setFloating( !mUi->mTimeZoneComboEnd->isEnabled() );
  checkDirtyStatus();
}

bool IncidenceDateTime::timeZonesAreLocal( const KDateTime &start, const KDateTime &end )
{
  // Returns false if the incidence start or end timezone is not the local zone.

  if ( ( start.isValid() && !start.timeSpec().isLocalZone() ) ||
       ( end.isValid() && !end.timeSpec().isLocalZone() ) ) {
    return false;
  } else {
    return true;
  }
}

void IncidenceDateTime::enableTimeEdits()
{
  // NOTE: assumes that the initial times are initialized.
  const bool wholeDayChecked = mUi->mWholeDayCheck->isChecked();

  setTimeZoneLabelEnabled( !wholeDayChecked );

  if ( mUi->mStartCheck->isChecked() ) {
    mUi->mStartTimeEdit->setEnabled( !wholeDayChecked );
    mUi->mTimeZoneComboStart->setEnabled( !wholeDayChecked );
    mUi->mTimeZoneComboStart->setFloating( wholeDayChecked, mInitialStartDT.timeSpec() );
  }
  if ( mUi->mEndCheck->isChecked() ) {
    mUi->mEndTimeEdit->setEnabled( !wholeDayChecked );
    mUi->mTimeZoneComboEnd->setEnabled( !wholeDayChecked );
    mUi->mTimeZoneComboEnd->setFloating( wholeDayChecked, mInitialEndDT.timeSpec() );
  }

  /**
     When editing a whole-day event, unchecking mWholeDayCheck shouldn't set both
     times to 00:00. DTSTART must always be smaller than DTEND
   */
  if ( sender() == mUi->mWholeDayCheck && !wholeDayChecked && // Somebody unchecked it, the incidence will now have time.
       mUi->mStartCheck->isChecked() && mUi->mEndCheck->isChecked() && // The incidence has both start and end/due dates
       currentStartDateTime() == currentEndDateTime() ) { // DTSTART == DTEND. This is illegal, lets correct it.
    // Not sure about the best time here... doesn't really matter, when someone unchecks mWholeDayCheck, she will
    // always want to set a time.
    mUi->mStartTimeEdit->setTime( QTime( 0, 0 ) );
    mUi->mEndTimeEdit->setTime( QTime( 1, 0 ) );
  }

#ifndef KDEPIM_MOBILE_UI
  const bool currentlyVisible = mUi->mTimeZoneLabel->text().contains( "&lt;&lt;" );
  setTimeZonesVisibility( !wholeDayChecked && mTimezoneCombosWereVisibile );
  mTimezoneCombosWereVisibile = currentlyVisible;
  if ( !wholeDayChecked && !timeZonesAreLocal( currentStartDateTime(), currentEndDateTime() ) ) {
    setTimeZonesVisibility( true );
    mTimezoneCombosWereVisibile = true;
  }
#endif
}

bool IncidenceDateTime::isDirty( const KCalCore::Todo::Ptr &todo ) const
{
  Q_ASSERT( todo );

  const bool hasDateTimes = mUi->mStartCheck->isChecked() ||
                            mUi->mEndCheck->isChecked();

  // First check the start time/date of the todo
  if ( todo->hasStartDate() != mUi->mStartCheck->isChecked() ) {
    return true;
  }

  if ( ( hasDateTimes && todo->allDay() ) != mUi->mWholeDayCheck->isChecked() ) {
    return true;
  }

  if ( todo->hasDueDate() != mUi->mEndCheck->isChecked() ) {
    return true;
  }

  if ( mUi->mStartCheck->isChecked() ) {
    // Use mActiveStartTime. This is the KDateTime::Spec selected on load coming from
    // the combobox. We use this one as it can slightly differ (e.g. missing
    // country code in the incidence time spec) from the incidence.
    if ( currentStartDateTime() != mInitialStartDT ) {
      return true;
    }
  }

  if ( mUi->mEndCheck->isChecked() && currentEndDateTime() != mInitialEndDT ) {
    return true;
  }

  return false;
}

/// Event specific methods

bool IncidenceDateTime::isDirty( const KCalCore::Event::Ptr &event ) const
{
  if ( event->allDay() != mUi->mWholeDayCheck->isChecked() ) {
    return true;
  }

  if ( mUi->mFreeBusyCheck->isChecked() &&
       event->transparency() != KCalCore::Event::Opaque ) {
    return true;
  }

  if ( !mUi->mFreeBusyCheck->isChecked() &&
       event->transparency() != KCalCore::Event::Transparent ) {
    return true;
  }

  if ( event->allDay() ) {
    if ( mUi->mStartDateEdit->date() != mInitialStartDT.date() ||
         mUi->mEndDateEdit->date() != mInitialEndDT.date() ) {
      return true;
    }
  } else {
    if ( currentStartDateTime() != mInitialStartDT ||
         currentEndDateTime() != mInitialEndDT ||
         currentStartDateTime().timeSpec() != mInitialStartDT.timeSpec() ||
         currentEndDateTime().timeSpec() != mInitialEndDT.timeSpec() ) {
      return true;
    }
  }

  return false;
}

bool IncidenceDateTime::isDirty( const KCalCore::Journal::Ptr &journal ) const
{
  if ( journal->allDay() != mUi->mWholeDayCheck->isChecked() ) {
    return true;
  }

  if ( journal->allDay() ) {
    if ( mUi->mStartDateEdit->date() != mInitialStartDT.date() ) {
      return true;
    }
  } else {
    if ( currentStartDateTime() != mInitialStartDT ) {
      return true;
    }
  }

  return false;
}

/// Private methods

KDateTime IncidenceDateTime::currentStartDateTime() const
{
  return KDateTime(
    mUi->mStartDateEdit->date(),
    mUi->mStartTimeEdit->time(),
    mUi->mTimeZoneComboStart->selectedTimeSpec() );
}

KDateTime IncidenceDateTime::currentEndDateTime() const
{
  return KDateTime(
    mUi->mEndDateEdit->date(),
    mUi->mEndTimeEdit->time(),
    mUi->mTimeZoneComboEnd->selectedTimeSpec() );
}

void IncidenceDateTime::load( const KCalCore::Event::Ptr &event, bool isTemplate, bool templateOverridesTimes )
{
  // First en/disable the necessary ui bits and pieces
  mUi->mStartCheck->setVisible( false );
  mUi->mStartCheck->setChecked( true ); // Set to checked so we can reuse enableTimeEdits.
  mUi->mEndCheck->setVisible( false );
  mUi->mEndCheck->setChecked( true ); // Set to checked so we can reuse enableTimeEdits.

  // Start time
  connect( mUi->mStartTimeEdit, SIGNAL(timeChanged(QTime)), // when editing with mouse, or up/down arrows
           SLOT(updateStartTime(QTime)) );
  connect( mUi->mStartTimeEdit, SIGNAL(timeEdited(QTime)), // When editing with any key except up/down
           SLOT(updateStartTime(QTime)) );
  connect( mUi->mStartDateEdit, SIGNAL(dateChanged(QDate)),
           SLOT(updateStartDate(QDate)) );
  connect( mUi->mTimeZoneComboStart, SIGNAL(currentIndexChanged(int)),
           SLOT(updateStartSpec()) );
  // End time
  connect( mUi->mEndTimeEdit, SIGNAL(timeChanged(QTime)),
           SLOT(checkDirtyStatus()) );
  connect( mUi->mEndTimeEdit, SIGNAL(timeEdited(QTime)),
           SLOT(checkDirtyStatus()) );
  connect( mUi->mEndDateEdit, SIGNAL(dateChanged(QDate)),
           SLOT(checkDirtyStatus()) );
  connect( mUi->mEndTimeEdit, SIGNAL(timeChanged(QTime)),
           SIGNAL(endTimeChanged(QTime)) );
  connect( mUi->mEndTimeEdit, SIGNAL(timeEdited(QTime)),
           SIGNAL(endTimeChanged(QTime)) );
  connect( mUi->mEndDateEdit, SIGNAL(dateChanged(QDate)),
           SIGNAL(endDateChanged(QDate)) );
  connect( mUi->mTimeZoneComboEnd, SIGNAL(currentIndexChanged(int)),
           SLOT(checkDirtyStatus()) );

  mUi->mWholeDayCheck->setChecked( event->allDay() );
  enableTimeEdits();

  if ( isTemplate ) {
    if ( templateOverridesTimes ) {
        // We only use the template times if the user didn't override them.
        setTimes( event->dtStart(), event->dtEnd() );
    }
  } else {
    KDateTime startDT = event->dtStart();
    KDateTime endDT = event->dtEnd();
    setDateTimes( startDT, endDT );
  }

  switch( event->transparency() ) {
  case KCalCore::Event::Transparent:
    mUi->mFreeBusyCheck->setChecked( false );
    break;
  case KCalCore::Event::Opaque:
    mUi->mFreeBusyCheck->setChecked( true );
    break;
  }
}

void IncidenceDateTime::load( const KCalCore::Journal::Ptr &journal, bool isTemplate, bool templateOverridesTimes )
{
  // First en/disable the necessary ui bits and pieces
  mUi->mStartCheck->setVisible( false );
  mUi->mStartCheck->setChecked( true ); // Set to checked so we can reuse enableTimeEdits.
  mUi->mEndCheck->setVisible( false );
  mUi->mEndCheck->setChecked( true ); // Set to checked so we can reuse enableTimeEdits.
  mUi->mEndDateEdit->setVisible( false );
  mUi->mEndTimeEdit->setVisible( false );
  mUi->mTimeZoneComboEnd->setVisible( false );
  mUi->mEndLabel->setVisible( false );
  mUi->mFreeBusyCheck->setVisible( false );

  // Start time
  connect( mUi->mStartTimeEdit, SIGNAL(timeChanged(QTime)),
           SLOT(updateStartTime(QTime)) );
  connect( mUi->mStartDateEdit, SIGNAL(dateChanged(QDate)),
           SLOT(updateStartDate(QDate)) );
  connect( mUi->mTimeZoneComboStart, SIGNAL(currentIndexChanged(int)),
           SLOT(updateStartSpec()) );

  mUi->mWholeDayCheck->setChecked( journal->allDay() );
  enableTimeEdits();

  if ( isTemplate ) {
    if ( templateOverridesTimes ) {
        // We only use the template times if the user didn't override them.
        setTimes( journal->dtStart(), KDateTime() );
    }
  } else {
    KDateTime startDT = journal->dtStart();

    // Convert UTC to local timezone, if needed (i.e. for kolab #204059)
    if ( startDT.isUtc() ) {
      startDT = startDT.toLocalZone();
    }
    setDateTimes( startDT, KDateTime() );
  }
}

void IncidenceDateTime::load( const KCalCore::Todo::Ptr &todo, bool isTemplate, bool templateOverridesTimes )
{
  // First en/disable the necessary ui bits and pieces
  mUi->mStartCheck->setVisible( true );
  mUi->mStartCheck->setChecked( todo->hasStartDate() );
  mUi->mStartDateEdit->setEnabled( todo->hasStartDate() );
  mUi->mStartTimeEdit->setEnabled( todo->hasStartDate() );
  mUi->mTimeZoneComboStart->setEnabled( todo->hasStartDate() );

  mUi->mEndLabel->setText( i18nc( "@label The due date/time of a to-do", "Due:" ) );
  mUi->mEndCheck->setVisible( true );
  mUi->mEndCheck->setChecked( todo->hasDueDate() );
  mUi->mEndDateEdit->setEnabled( todo->hasDueDate() );
  mUi->mEndTimeEdit->setEnabled( todo->hasDueDate() );
  mUi->mTimeZoneComboEnd->setEnabled( todo->hasDueDate() );

  // These fields where not enabled in the old code either:
  mUi->mFreeBusyCheck->setVisible( false );

  const bool hasDateTimes = mUi->mEndCheck->isChecked() || mUi->mStartCheck->isChecked();
  mUi->mWholeDayCheck->setChecked( hasDateTimes && todo->allDay() );
  mUi->mWholeDayCheck->setEnabled( hasDateTimes );

  // Connect to the right logic
  connect( mUi->mStartCheck, SIGNAL(toggled(bool)), SLOT(enableStartEdit(bool)) );
  connect( mUi->mStartCheck, SIGNAL(toggled(bool)), SIGNAL(startDateTimeToggled(bool)) );
  connect( mUi->mStartDateEdit, SIGNAL(dateChanged(QDate)), SLOT(checkDirtyStatus()) );
  connect( mUi->mStartTimeEdit, SIGNAL(timeChanged(QTime)), SLOT(updateStartTime(QTime)) );
  connect( mUi->mTimeZoneComboStart, SIGNAL(currentIndexChanged(int)), SLOT(checkDirtyStatus()) );

  connect( mUi->mEndCheck, SIGNAL(toggled(bool)), SLOT(enableEndEdit(bool)) );
  connect( mUi->mEndCheck, SIGNAL(toggled(bool)), SIGNAL(endDateTimeToggled(bool)) );
  connect( mUi->mEndDateEdit, SIGNAL(dateChanged(QDate)), SLOT(checkDirtyStatus()) );
  connect( mUi->mEndTimeEdit, SIGNAL(timeChanged(QTime)), SLOT(checkDirtyStatus()) );
  connect( mUi->mEndDateEdit, SIGNAL(dateChanged(QDate)), SIGNAL(endDateChanged(QDate)) );
  connect( mUi->mEndTimeEdit, SIGNAL(timeChanged(QTime)), SIGNAL(endTimeChanged(QTime)) );
  connect( mUi->mTimeZoneComboEnd, SIGNAL(currentIndexChanged(int)), SLOT(checkDirtyStatus()) );

  const KDateTime rightNow = KDateTime( QDate::currentDate(), QTime::currentTime() ).toLocalZone();

  if ( isTemplate ) {
    if ( templateOverridesTimes ) {
        // We only use the template times if the user didn't override them.
        setTimes( todo->dtStart(), todo->dateTime( KCalCore::Incidence::RoleEnd ) );
    }
  } else {
    const KDateTime endDT   = todo->hasDueDate() ? todo->dtDue( true/** first */ ) : rightNow;
    const KDateTime startDT = todo->hasStartDate() ? todo->dtStart( true/** first */ ) : rightNow;
    setDateTimes( startDT, endDT );
  }
}

void IncidenceDateTime::save( const KCalCore::Event::Ptr &event )
{
  if ( mUi->mWholeDayCheck->isChecked() ) { // All day event
    event->setAllDay( true );

    // TODO: need to change this.
    KDateTime eventDTStart = currentStartDateTime();
    eventDTStart.setDateOnly( true );
    event->setDtStart( eventDTStart );

    KDateTime eventDTEnd = currentEndDateTime();
    eventDTEnd.setDateOnly( true );

    event->setDtEnd( eventDTEnd );
  } else { // Timed Event
    event->setAllDay( false );

    // set date/time end
    event->setDtStart( currentStartDateTime() );
    event->setDtEnd( currentEndDateTime() );
  }

  // Free == Event::Transparent
  // Busy == Event::Opaque
  event->setTransparency( mUi->mFreeBusyCheck->isChecked() ?
                          KCalCore::Event::Opaque :
                          KCalCore::Event::Transparent );
}

void IncidenceDateTime::save( const KCalCore::Todo::Ptr &todo )
{
  if ( mUi->mStartCheck->isChecked() ) {
    todo->setDtStart( currentStartDateTime() );
    // Set allday must be executed after setDtStart
    todo->setAllDay( mUi->mWholeDayCheck->isChecked() );
    if ( currentStartDateTime() != mInitialStartDT ) {
      // We don't offer any way to edit the current completed occurrence.
      // So, if the start date changes, reset the dtRecurrence
      todo->setDtRecurrence( currentStartDateTime() );
    }
  } else {
    todo->setDtStart( KDateTime() );
  }

  if ( mUi->mEndCheck->isChecked() ) {
    todo->setDtDue( currentEndDateTime(), true/** first */ );
    // Set allday must be executed after setDtDue
    todo->setAllDay( mUi->mWholeDayCheck->isChecked() );
  } else {
    todo->setDtDue( KDateTime() );
  }
}

void IncidenceDateTime::save( const KCalCore::Journal::Ptr &journal )
{
  journal->setAllDay( mUi->mWholeDayCheck->isChecked() );

  if ( mUi->mWholeDayCheck->isChecked() ) { // All day journal
    KDateTime journalDTStart = currentStartDateTime();
    journalDTStart.setDateOnly( true );
    journal->setDtStart( journalDTStart );
  } else { // Timed Journal
    // set date/time end
    journal->setDtStart( currentStartDateTime() );
  }
}

void IncidenceDateTime::setDateTimes( const KDateTime &start, const KDateTime &end )
{
  const KDateTime::Spec startSpec = start.timeSpec();
  const KDateTime::Spec endSpec = end.timeSpec();

  // Combo boxes only have system time zones
  if ( startSpec.type() == KDateTime::TimeZone ) {
    const KTimeZone systemTz = KSystemTimeZones::zone( startSpec.timeZone().name() );
    if ( !systemTz.isValid() ) {
      const KCalCore::ICalTimeZone icalTz( startSpec.timeZone() );
      mTimeZones->add( icalTz );
    }
  }

  if ( endSpec.type() == KDateTime::TimeZone ) {
    const KTimeZone systemTz = KSystemTimeZones::zone( endSpec.timeZone().name() );
    if ( !systemTz.isValid() ) {
      const KCalCore::ICalTimeZone icalTz( endSpec.timeZone() );
      mTimeZones->add( icalTz );
    }
  }

  mUi->mTimeZoneComboStart->setAdditionalTimeZones( mTimeZones );
  mUi->mTimeZoneComboEnd->setAdditionalTimeZones( mTimeZones );

  if ( start.isValid() ) {
    mUi->mStartDateEdit->setDate( start.date() );
    mUi->mStartTimeEdit->setTime( start.time() );
    mUi->mTimeZoneComboStart->selectTimeSpec( start.timeSpec() );
  } else {
    KDateTime dt( QDate::currentDate(), QTime::currentTime() );
    mUi->mStartDateEdit->setDate( dt.date() );
    mUi->mStartTimeEdit->setTime( dt.time() );
    mUi->mTimeZoneComboStart->selectTimeSpec( dt.timeSpec() );
  }

  if ( end.isValid() ) {
    mUi->mEndDateEdit->setDate( end.date() );
    mUi->mEndTimeEdit->setTime( end.time() );
    mUi->mTimeZoneComboEnd->selectTimeSpec( end.timeSpec() );
  } else {
    KDateTime dt( QDate::currentDate(), QTime::currentTime().addSecs( 60 * 60 ) );
    mUi->mEndDateEdit->setDate( dt.date() );
    mUi->mEndTimeEdit->setTime( dt.time() );
    mUi->mTimeZoneComboEnd->selectTimeSpec( dt.timeSpec() );
  }

  mCurrentStartDateTime = currentStartDateTime();
  emit startDateChanged( start.date() );
  emit startTimeChanged( start.time() );
  emit endDateChanged( end.date() );
  emit endTimeChanged( end.time() );

  updateStartToolTips();
  updateEndToolTips();
}

void IncidenceDateTime::updateStartToolTips()
{
  if ( mUi->mStartCheck->isChecked() ) {
    QString datetimeStr =
      KCalUtils::IncidenceFormatter::dateTimeToString(
        currentStartDateTime(),
        mUi->mWholeDayCheck->isChecked(),
        false,
        KSystemTimeZones::local() );
    mUi->mStartDateEdit->setToolTip( i18n( "Starts: %1", datetimeStr ) );
    mUi->mStartTimeEdit->setToolTip( i18n( "Starts: %1", datetimeStr ) );
  } else {
    mUi->mStartDateEdit->setToolTip( i18n( "Starting Date" ) );
    mUi->mStartTimeEdit->setToolTip( i18n( "Starting Time" ) );
  }
}

void IncidenceDateTime::updateEndToolTips()
{
  if ( mUi->mStartCheck->isChecked() ) {
    QString datetimeStr =
      KCalUtils::IncidenceFormatter::dateTimeToString(
        currentEndDateTime(),
        mUi->mWholeDayCheck->isChecked(),
        false,
        KSystemTimeZones::local() );
    if ( mLoadedIncidence->type() == KCalCore::Incidence::TypeTodo ) {
      mUi->mEndDateEdit->setToolTip( i18n( "Due on: %1", datetimeStr ) );
      mUi->mEndTimeEdit->setToolTip( i18n( "Due on: %1", datetimeStr ) );
    } else {
      mUi->mEndDateEdit->setToolTip( i18n( "Ends: %1", datetimeStr ) );
      mUi->mEndTimeEdit->setToolTip( i18n( "Ends: %1", datetimeStr ) );
    }
  } else {
    if ( mLoadedIncidence->type() == KCalCore::Incidence::TypeTodo ) {
      mUi->mEndDateEdit->setToolTip( i18n( "Due Date" ) );
      mUi->mEndTimeEdit->setToolTip( i18n( "Due Time" ) );
    } else {
      mUi->mEndDateEdit->setToolTip( i18n( "Ending Date" ) );
      mUi->mEndTimeEdit->setToolTip( i18n( "Ending Time" ) );
    }
  }
}

void IncidenceDateTime::setTimes( const KDateTime &start, const KDateTime &end )
{
  // like setDateTimes(), but it set only the start/end time, not the date
  // it is used while applying a template to an event.
  mUi->mStartTimeEdit->blockSignals( true );
  mUi->mStartTimeEdit->setTime( start.time() );
  mUi->mStartTimeEdit->blockSignals( false );

  mUi->mEndTimeEdit->setTime( end.time() );

  mUi->mTimeZoneComboStart->selectTimeSpec( start.timeSpec() );
  mUi->mTimeZoneComboEnd->selectTimeSpec( end.timeSpec() );

//   emitDateTimeStr();
}

void IncidenceDateTime::setStartDate( const QDate &newDate )
{
  mUi->mStartDateEdit->setDate( newDate );
  updateStartDate( newDate );
}

void IncidenceDateTime::setStartTime( const QTime &newTime )
{
  mUi->mStartTimeEdit->setTime( newTime );
  updateStartTime( newTime );
}

bool IncidenceDateTime::startDateTimeEnabled() const
{
  return mUi->mStartCheck->isChecked();
}

bool IncidenceDateTime::endDateTimeEnabled() const
{
  return mUi->mEndCheck->isChecked();
}

bool IncidenceDateTime::isValid() const
{
  if ( startDateTimeEnabled() && !currentStartDateTime().isValid() ) {
    //TODO: Add strings
    qWarning() << "Start date is invalid";
    return false;
  }

  if ( endDateTimeEnabled() && !currentEndDateTime().isValid() ) {
    //TODO: Add strings
    qWarning() << "End date is invalid";
    return false;
  }

  if ( startDateTimeEnabled() && endDateTimeEnabled() &&
       currentStartDateTime() > currentEndDateTime() ) {
    if ( mLoadedIncidence->type() == KCalCore::Incidence::TypeEvent ) {
      mLastErrorString = i18nc( "@info",
                                "The event ends before it starts.\n"
                                "Please correct dates and times." );

    } else if ( mLoadedIncidence->type() == KCalCore::Incidence::TypeTodo ) {
      mLastErrorString = i18nc( "@info",
                                "The to-do is due before it starts.\n"
                                "Please correct dates and times." );

    } else if ( mLoadedIncidence->type() == KCalCore::Incidence::TypeJournal ) {
      return true;
    }

    kDebug() << mLastErrorString;
    return false;
  } else {
    mLastErrorString.clear();
    return true;
  }
}

static QString timespecToString( const KDateTime::Spec &spec )
{
  QString str = QLatin1String( "type=" ) + QString::number( spec.type() ) + QLatin1String( "; timezone=" ) + spec.timeZone().name();
  return str;
}

void IncidenceDateTime::printDebugInfo() const
{
  qDebug() << "startDateTimeEnabled()          : " << startDateTimeEnabled();
  qDebug() << "endDateTimeEnabled()            : " << endDateTimeEnabled();
  qDebug() << "currentStartDateTime().isValid(): " << currentStartDateTime().isValid();
  qDebug() << "currentEndDateTime().isValid()  : " << currentEndDateTime().isValid();
  qDebug() << "currentStartDateTime()          : " << currentStartDateTime().toString();
  qDebug() << "currentEndDateTime()            : " << currentEndDateTime().toString();
  qDebug() << "Incidence type                  : " << mLoadedIncidence->type();
  qDebug() << "allday                          : " << mLoadedIncidence->allDay();
  qDebug() << "mInitialStartDT                 : " << mInitialStartDT.toString();
  qDebug() << "mInitialEndDT                   : " << mInitialEndDT.toString();

  qDebug() << "currentStartDateTime().timeSpec(): " << timespecToString( currentStartDateTime().timeSpec() );
  qDebug() << "currentEndDateTime().timeSpec()  : " << timespecToString( currentStartDateTime().timeSpec() );
  qDebug() << "mInitialStartDT.timeSpec()       : " << timespecToString( mInitialStartDT.timeSpec() );
  qDebug() << "mInitialEndDT.timeSpec()         : " << timespecToString( mInitialEndDT.timeSpec() );

  qDebug() << "dirty test1: " << ( mLoadedIncidence->allDay() != mUi->mWholeDayCheck->isChecked() );
  if ( mLoadedIncidence->type() == KCalCore::Incidence::TypeEvent ) {
    KCalCore::Event::Ptr event = mLoadedIncidence.staticCast<KCalCore::Event>();
    qDebug() << "dirty test2: " << ( mUi->mFreeBusyCheck->isChecked() && event->transparency() != KCalCore::Event::Opaque );
    qDebug() << "dirty test3: " << ( !mUi->mFreeBusyCheck->isChecked() && event->transparency() != KCalCore::Event::Transparent ) ;
  }

  if ( mLoadedIncidence->allDay() ) {
    qDebug() << "dirty test4: " << ( mUi->mStartDateEdit->date() != mInitialStartDT.date() || mUi->mEndDateEdit->date() != mInitialEndDT.date() );
  } else {
    qDebug() << "dirty test4.1: " << ( currentStartDateTime() != mInitialStartDT );
    qDebug() << "dirty test4.2: " << ( currentEndDateTime() != mInitialEndDT );
    qDebug() << "dirty test4.3: " << ( currentStartDateTime().timeSpec() != mInitialStartDT.timeSpec() );
    qDebug() << "dirty test4.4: " << ( currentEndDateTime().timeSpec() != mInitialEndDT.timeSpec() );
  }
}

void IncidenceDateTime::setTimeZoneLabelEnabled( bool enable )
{
#ifndef KDEPIM_MOBILE_UI
  mUi->mTimeZoneLabel->setVisible( enable );
#else
  Q_UNUSED( enable );
#endif
}