/*
 * Copyright (c) 2011 Laurent Montel <montel@kde.org>
 *
 * 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 "recentcollectionaction_p.h"
#include "metatypes.h"
#include <akonadi/entitytreemodel.h>
#include <KConfig>
#include <KConfigGroup>
#include <KLocale>

#include <QMenu>
#include <QAction>
using namespace Akonadi;

static int s_maximumRecentCollection = 10;

RecentCollectionAction::RecentCollectionAction(const QAbstractItemModel *model, QMenu *menu)
  :QObject( menu ),
   mMenu( menu ),
   mModel( model ),
   mRecentAction( 0 )
{
  mAkonadiConfig = KSharedConfig::openConfig( QLatin1String( "akonadikderc" ) );
  KConfigGroup group( mAkonadiConfig, QLatin1String( "Recent Collections" ) );

  mListRecentCollection = group.readEntry( "Collections", QStringList() );
  mRecentAction = mMenu->addAction( i18n( "Recent Folder" ) );
  mMenu->addSeparator();
  fillRecentCollection();
}

RecentCollectionAction::~RecentCollectionAction()
{
}

void RecentCollectionAction::fillRecentCollection()
{
  delete mRecentAction->menu();
  if ( mListRecentCollection.isEmpty() ) {
    mRecentAction->setEnabled( false );
    return;
  }

  QMenu* popup = new QMenu;
  mRecentAction->setMenu( popup );

  const int numberOfRecentCollection(mListRecentCollection.count());
  for ( int i=0; i < numberOfRecentCollection; ++i )
  {
    const QModelIndex index = Akonadi::EntityTreeModel::modelIndexForCollection( mModel, Akonadi::Collection( mListRecentCollection.at( i ).toLongLong() ) );
    if ( index.isValid() ) {
      QAction *action = popup->addAction( actionName( index ) );
      const QIcon icon = mModel->data( index, Qt::DecorationRole ).value<QIcon>();
      action->setIcon( icon );
      action->setData( QVariant::fromValue<QModelIndex>( index ) );
    }
  }
}

QString RecentCollectionAction::actionName(QModelIndex index)
{
  QString name = index.data().toString();
  name.replace( QLatin1String( "&" ), QLatin1String( "&&" ) );

  index = index.parent();
  QString topLevelName;
  while ( index != QModelIndex() ) {
    topLevelName = index.data().toString();
    index = index.parent();
  }
  if ( topLevelName.isEmpty() )
    return QString::fromLatin1( "%1" ).arg( name );
  else {
    topLevelName.replace( QLatin1String( "&" ), QLatin1String( "&&" ) );
    return QString::fromLatin1( "%1 - %2" ).arg( name ).arg( topLevelName );
  }
}

void RecentCollectionAction::addRecentCollection( Akonadi::Collection::Id id )
{
  const QString newCollectionID = QString::number( id );
  if ( mListRecentCollection.isEmpty() ||
       !mListRecentCollection.contains( newCollectionID ) ) {
    if ( mListRecentCollection.count() == s_maximumRecentCollection )
      mListRecentCollection.removeFirst();
    mListRecentCollection.append( newCollectionID );
    writeConfig();
    fillRecentCollection();
  }
}

void RecentCollectionAction::writeConfig()
{
  KConfigGroup group( mAkonadiConfig, QLatin1String( "Recent Collections" ) );
  group.writeEntry( "Collections", mListRecentCollection );
  group.sync();
}

void RecentCollectionAction::cleanRecentCollection()
{
  mListRecentCollection.clear();
  writeConfig();
  fillRecentCollection();
}

#include "recentcollectionaction_p.moc"
