/*
    Copyright (c) 2010 Volker Krause <vkrause@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 "searchmanager.h"
#include <akdebug.h>
#include "agentsearchengine.h"
#include "nepomuksearchengine.h"
#include "entities.h"
#include "xesamsearchengine.h"
#include <storage/notificationcollector.h>

using namespace Akonadi;

SearchManager* SearchManager::m_instance = 0;

Q_DECLARE_METATYPE( Collection )

SearchManager::SearchManager( const QStringList &searchEngines, QObject *parent  ) :
  QObject( parent )
{
  Q_ASSERT( m_instance == 0 );
  m_instance = this;

  qRegisterMetaType<Collection>();

  m_engines.reserve( searchEngines.size() );
  foreach ( const QString &engineName, searchEngines ) {
    if ( engineName == QLatin1String( "Nepomuk" ) ) {
      m_engines.append( new NepomukSearchEngine );
    } else if ( engineName == QLatin1String( "Agent" ) ) {
      m_engines.append( new AgentSearchEngine );
    } else if ( engineName == QLatin1String( "Xesam" ) ) {
      m_engines.append( new XesamSearchEngine );
    } else {
      akError() << "Unknown search engine type: " << engineName;
    }
  }
}

SearchManager::~SearchManager()
{
  qDeleteAll( m_engines );
  m_instance = 0;
}

SearchManager* SearchManager::instance()
{
  return m_instance;
}

bool SearchManager::addSearch(const Collection& collection)
{
  if ( collection.queryString().isEmpty() || collection.queryLanguage().isEmpty() )
    return false;

  // send to the main thread
  QMetaObject::invokeMethod( this, "addSearchInternal", Qt::QueuedConnection, Q_ARG(Collection, collection) );
  return true;
}

void SearchManager::addSearchInternal(const Collection& collection)
{
  foreach ( AbstractSearchEngine* engine, m_engines )
    engine->addSearch( collection );
}

bool SearchManager::removeSearch(qint64 id)
{
  // send to the main thread
  QMetaObject::invokeMethod( this, "removeSearchInternal", Qt::QueuedConnection, Q_ARG(qint64, id) );
  return true;
}

void SearchManager::removeSearchInternal(qint64 id)
{
  foreach ( AbstractSearchEngine* engine, m_engines )
    engine->removeSearch( id );
}

void SearchManager::updateSearch(const Akonadi::Collection& collection, NotificationCollector* collector)
{
  removeSearch( collection.id() );
  foreach ( const PimItem &item, collection.pimItems() )
    collector->itemUnlinked( item, collection );
  collection.clearPimItems();
  addSearch( collection );
}

#include "searchmanager.moc"
