/*
  This file is part of KOrganizer.

  Copyright (c) 2001 Cornelius Schumacher <schumacher@kde.org>
  Copyright (C) 2003-2004 Reinhold Kainhofer <reinhold@kainhofer.com>

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

  This program 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 General Public License for more details.

  You should have received a copy of the GNU General Public License along
  with this program; if not, write to the Free Software Foundation, Inc.,
  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

  As a special exception, permission is given to link this program
  with any edition of Qt, and distribute the resulting executable,
  without including the source code for Qt in the source distribution.
*/

// View of Journal entries

#include "journalview.h"
#include "journalframe.h"

#include <calendarsupport/utils.h>

#include <KVBox>

#include <QEvent>
#include <QScrollArea>
#include <QVBoxLayout>

using namespace EventViews;

JournalView::JournalView( QWidget *parent ) : EventView( parent ), mChanger( 0 )
{
  QVBoxLayout *topLayout = new QVBoxLayout( this );
  topLayout->setMargin( 0 );
  mSA = new QScrollArea( this );
  mVBox = new KVBox( mSA->viewport() );
  mSA->setHorizontalScrollBarPolicy( Qt::ScrollBarAlwaysOff );
  mSA->setWidgetResizable ( true );
  mSA->setWidget( mVBox );
  topLayout->addWidget( mSA );

  installEventFilter( this );
}

JournalView::~JournalView()
{
}

void JournalView::appendJournal( const Akonadi::Item &journal, const QDate &dt )
{
  JournalDateView *entry = 0;
  if ( mEntries.contains( dt ) ) {
    entry = mEntries[dt];
  } else {
    entry = new JournalDateView( calendar(), mVBox );
    entry->setDate( dt );
    entry->setIncidenceChanger( mChanger );
    entry->show();
    connect( this, SIGNAL(flushEntries()), entry, SIGNAL(flushEntries()) );
    connect( this, SIGNAL(setIncidenceChangerSignal(Akonadi::IncidenceChanger*)),
             entry, SLOT(setIncidenceChanger(Akonadi::IncidenceChanger*)) );
    connect( this, SIGNAL(journalEdited(Akonadi::Item)),
             entry, SLOT(journalEdited(Akonadi::Item)) );
    connect( this, SIGNAL(journalDeleted(Akonadi::Item)),
             entry, SLOT(journalDeleted(Akonadi::Item)) );

    connect( entry, SIGNAL(editIncidence(Akonadi::Item)),
             this, SIGNAL(editIncidenceSignal(Akonadi::Item)) );
    connect( entry, SIGNAL(deleteIncidence(Akonadi::Item)),
             this, SIGNAL(deleteIncidenceSignal(Akonadi::Item)) );
    connect( entry, SIGNAL(newJournal(QDate)),
             this, SIGNAL(newJournalSignal(QDate)) );
    connect( entry, SIGNAL(incidenceSelected(Akonadi::Item,QDate)),
                    SIGNAL(incidenceSelected(Akonadi::Item,QDate)) );
    connect( entry, SIGNAL(printJournal(KCalCore::Journal::Ptr)),
                    SIGNAL(printJournal(KCalCore::Journal::Ptr)) );
    mEntries.insert( dt, entry );
  }

  if ( entry && CalendarSupport::hasJournal( journal ) ) {
    entry->addJournal( journal );
  }
}

int JournalView::currentDateCount() const
{
  return mEntries.size();
}

Akonadi::Item::List JournalView::selectedIncidences() const
{
  // We don't have a selection in the journal view.
  // FIXME: The currently edited journal is the selected incidence...
  Akonadi::Item::List eventList;
  return eventList;
}

void JournalView::clearEntries()
{
  //kDebug(5850) << "JournalView::clearEntries()";
  QMap<QDate, JournalDateView*>::Iterator it;
  for ( it = mEntries.begin(); it != mEntries.end(); ++it ) {
    delete it.value();
  }
  mEntries.clear();
}
void JournalView::updateView()
{
  QMap<QDate, JournalDateView*>::Iterator it = mEntries.end();
  while ( it != mEntries.begin() ) {
    --it;
    it.value()->clear();
    const KCalCore::Journal::List journals = calendar()->journals( it.key() );
    kDebug() << "updateview found" << journals.count();
    Q_FOREACH ( const KCalCore::Journal::Ptr &journal, journals ) {
      Akonadi::Item item = calendar()->item( journal );
      it.value()->addJournal( item );
    }
  }
}

void JournalView::flushView()
{
  emit flushEntries();
}

void JournalView::showDates( const QDate &start, const QDate &end, const QDate & )
{
  clearEntries();
  if ( end<start ) {
    kWarning() << "End is smaller than start. end=" << end << "; start=" << start;
    return;
  }

  KCalCore::Journal::List jnls;
  for ( QDate d=end; d>=start; d=d.addDays(-1) ) {
    jnls = calendar()->journals( d );
    //kDebug() << "Found" << jnls.count() << "journals on date" << d;
    foreach( const KCalCore::Journal::Ptr &journal, jnls ) {
      Akonadi::Item item = calendar()->item( journal );
      appendJournal( item, d );
    }
    if ( jnls.isEmpty() ) {
      // create an empty dateentry widget
      //updateView();
      //kDebug() << "Appended null journal";
      appendJournal( Akonadi::Item(), d );
    }
  }
}

void JournalView::showIncidences( const Akonadi::Item::List &incidences, const QDate &date )
{
  Q_UNUSED( date );
  clearEntries();
  Q_FOREACH ( const Akonadi::Item &i, incidences ) {
    if ( const KCalCore::Journal::Ptr j = CalendarSupport::journal( i ) ) {
      appendJournal( i, j->dtStart().date() );
    }
  }
}

void JournalView::changeIncidenceDisplay( const Akonadi::Item &incidence,
                                            Akonadi::IncidenceChanger::ChangeType changeType )
{
  if ( KCalCore::Journal::Ptr journal = CalendarSupport::journal( incidence ) ) {
    switch ( changeType ) {
    case Akonadi::IncidenceChanger::ChangeTypeCreate:
      appendJournal( incidence, journal->dtStart().date() );
      break;
    case Akonadi::IncidenceChanger::ChangeTypeModify:
      emit journalEdited( incidence );
      break;
    case Akonadi::IncidenceChanger::ChangeTypeDelete:
      emit journalDeleted( incidence );
      break;
    default:
      kWarning() << "Illegal change type" << changeType;
    }
  }
}

void JournalView::setIncidenceChanger( Akonadi::IncidenceChanger *changer )
{
  mChanger = changer;
  emit setIncidenceChangerSignal( changer );
}

void JournalView::newJournal()
{
  emit newJournalSignal( QDate::currentDate() );
}

bool JournalView::eventFilter( QObject *object, QEvent *event )
{
  Q_UNUSED( object );
  switch ( event->type() ) {
  case QEvent::MouseButtonDblClick:
    emit newJournalSignal( QDate() );
    return true;
  default:
    return false;
  }
}


