/***************************************************************************
                          ExpiredElementsDialog.h  -  description
                             -------------------
    begin                : Sat Jun 21 2003
    copyright            : (C) 2003 by Alexander Theel
    email                : alex.theel@gmx.net
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/

#include "ExpiredElementsDialog.h"

#include <qlabel.h>
#include <qpushbutton.h>


// -------------------------------------------------------------------------------
ExpiredElementsDialog::ExpiredElementsDialog( QWidget* pParent )
   : ExpiredElementsDialogInterface(pParent, "expiredElementsDialog", TRUE)
   , mpCollection( NULLPTR )
// -------------------------------------------------------------------------------
{
   connect( pExpiryList, SIGNAL(clicked(QListViewItem*)), this, SLOT(previewEntry(QListViewItem*)) );
   connect( pRemoveFromListButton, SIGNAL(clicked()), this, SLOT(removeSelectedItemsFromDeletionList()) );

   connect( buttonOk, SIGNAL(clicked()), this, SLOT(deleteRemainingEntries()) );
}


// -------------------------------------------------------------------------------
int ExpiredElementsDialog::setUp( CInformationCollection* pCollection )
// -------------------------------------------------------------------------------
{
   if ( (NULLPTR == pCollection) || (NULLPTR == pExpiryList) || (NULLPTR == buttonOk) )
      return 0;

   mpCollection = pCollection;

   expiredElementsMap.clear();
   pExpiryList->clear();


   checkEntryForExpiryDate( mpCollection->getRootElement() );
   if ( pExpiryList->childCount() > 0 )
   {
      show();
      return exec();
   }
   else
   {
      return 0;
   }

   buttonOk->setEnabled( true );
}


// -------------------------------------------------------------------------------
void ExpiredElementsDialog::checkEntryForExpiryDate( CInformationElement* pElement )
// -------------------------------------------------------------------------------
{
   if ( NULLPTR == pElement )
      return;

   if ( pElement->expires() )
   {
      //std::cout<<"ExpiredElementsDialog::checkEntryForExpiryDate; found: "<<pElement->getDescription()<<std::endl;
      if ( pElement->getExpiryDate() < QDate::currentDate() )
      {
         QListViewItem* pItem = new QListViewItem( pExpiryList, pElement->getDescription() );
         pItem->setPixmap( 0, QPixmap(pElement->getIconFileName()) );
         expiredElementsMap.insert( pItem, pElement );
         //std::cout<<"icon="<<pElement->getIconFileName()<<std::endl;
      }
   }

   QPtrListIterator<CInformationElement> it(*pElement->getChildren());
   CInformationElement* x;
   while( (x = it.current()) != 0 ){
      ++it;
      checkEntryForExpiryDate( x );
   }
}


// -------------------------------------------------------------------------------
void ExpiredElementsDialog::removeSelectedItemsFromDeletionList( void )
// -------------------------------------------------------------------------------
{
   if ( NULLPTR == pExpiryList )
      return;

   QListViewItem* x = pExpiryList->firstChild();
   QListViewItem* pItemAbove = NULLPTR;
   while ( NULLPTR != x  )
   {
      //std::cout<<"rem; x->getDescription()="<<x->text(0)<<std::endl;
      if ( pExpiryList->isSelected( x ) )
      {
         CInformationElement* pElement = expiredElementsMap.find( x );
         if ( NULLPTR != pElement )
         {
            pElement->setExpiryDate( false );      // remove expiry date
         }

         expiredElementsMap.remove( x );        // remove from dictionary

         // removing x from qlistview is not a good idea, because
         // otherwise 'x' would be '0'; -> loop would be left after first
         // element is removed -> so delete previouse element
         pItemAbove = x;
         x = x->nextSibling();
         DELETE( pItemAbove );                  // remove from qlistview
      }
      else
      {
         x = x->nextSibling();
      }
   }

   clearPreview();

   // if list is empty, disable the button
   if ( 0 == pExpiryList->childCount() )
   {
      if ( buttonOk )
         buttonOk->setEnabled( false );
   }
}


// -------------------------------------------------------------------------------
// Removes everything from the preview.
// -------------------------------------------------------------------------------
void ExpiredElementsDialog::clearPreview( void )
// -------------------------------------------------------------------------------
{
   pElementIconLabel->setPixmap( QPixmap("") );
   pElementNameLabel->setText( "" );
   pChildCountLabel->setText( "-" );
   pTextEdit->setText( "" );
}


// -------------------------------------------------------------------------------
void ExpiredElementsDialog::previewEntry( QListViewItem* pItem )
// -------------------------------------------------------------------------------
{
   if ( NULLPTR == pItem )
      return;

   CInformationElement* pElement = expiredElementsMap.find( pItem );
   previewEntry( pElement );

}

// -------------------------------------------------------------------------------
void ExpiredElementsDialog::previewEntry( CInformationElement* pElement )
// -------------------------------------------------------------------------------
{
   if ( NULLPTR == pElement )
      return;

   pElementIconLabel->setPixmap( QPixmap(pElement->getIconFileName()) );
   pElementNameLabel->setText( pElement->getDescription() );
   pChildCountLabel->setText( QString::number( pElement->childCount() ) );
   pTextEdit->setText( pElement->getInformation() );
}

// -------------------------------------------------------------------------------
void ExpiredElementsDialog::deleteRemainingEntries( void )
// -------------------------------------------------------------------------------
{
   //std::cout<<"ExpiredElementsDialog::deleteRemainingEntries()"<<std::endl;

   for ( QListViewItem* x = pExpiryList->firstChild(); x != NULLPTR; x = x->nextSibling() )
   {
      CInformationElement* pElement = expiredElementsMap.find( x );

      // It could be the case that the parent of this element was deleted
      // before. Hence this element does not exist anymore.
      if ( pElement )
      {
         pElement->deleteSelf();          // remove "actual" information element from collection
      }
   }
}