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/* This file is (c) 2008-2012 Konstantin Isakov <ikm@goldendict.org>
 * Part of GoldenDict. Licensed under GPLv3 or later, see the LICENSE file */

#include "instances.hh"
#include <set>
#include <QBuffer>
#include <utility>

namespace Instances {

using std::set;
using std::string;

Group::Group( const Config::Group & cfgGroup,
              const std::vector< sptr< Dictionary::Class > > & allDictionaries,
              const Config::Group & inactiveGroup ):
  id( cfgGroup.id ),
  name( cfgGroup.name ),
  icon( cfgGroup.icon ),
  favoritesFolder( cfgGroup.favoritesFolder ),
  shortcut( cfgGroup.shortcut )
{
  if ( !cfgGroup.iconData.isEmpty() ) {
    iconData = iconFromData( cfgGroup.iconData );
  }

  QMap< string, sptr< Dictionary::Class > > groupDicts;
  QList< string > dictOrderList;
  auto dictMap = Dictionary::dictToMap( allDictionaries );

  for ( const auto & dict : cfgGroup.dictionaries ) {
    const std::string dictId = dict.id.toStdString();

    //avoid duplicate dictionary in groups in config file.
    if ( dictMap.contains( dictId ) && !dictOrderList.contains( dictId ) ) {
      groupDicts.insert( dictId, dictMap[ dictId ] );
      dictOrderList.push_back( dictId );
    }
  }

  // Remove inactive dictionaries
  if ( !inactiveGroup.dictionaries.isEmpty() ) {
    for ( const auto & dict : inactiveGroup.dictionaries ) {
      const string dictId = dict.id.toStdString();
      groupDicts.remove( dictId );
      dictOrderList.removeOne( dictId );
    }
  }
  for ( const auto & dictId : dictOrderList ) {
    if ( groupDicts.contains( dictId ) ) {
      dictionaries.push_back( groupDicts[ dictId ] );
    }
  }
}

Group::Group():
  id( 0 )
{
}

Group::Group( unsigned id_, QString name_ ):
  id( id_ ),
  name( std::move( name_ ) )
{
}

Config::Group Group::makeConfigGroup()
{
  Config::Group result;

  result.id              = id;
  result.name            = name;
  result.icon            = icon;
  result.shortcut        = shortcut;
  result.favoritesFolder = favoritesFolder;

  if ( !iconData.isNull() ) {
    QDataStream stream( &result.iconData, QIODevice::WriteOnly );

    stream << iconData;
  }

  for ( const auto & dict : dictionaries ) {
    result.dictionaries.push_back(
      Config::DictionaryRef( dict->getId().c_str(), QString::fromUtf8( dict->getName().c_str() ) ) );
  }

  return result;
}

QIcon Group::makeIcon() const
{
  if ( !iconData.isNull() ) {
    return iconData;
  }

  QIcon i = icon.size() ? QIcon( ":/flags/" + icon ) : QIcon();

  return i;
}

void Group::checkMutedDictionaries( Config::DictionarySets * mutedDictionaries ) const
{
  Config::DictionarySets temp;

  for ( const auto & dict : dictionaries ) {
    auto dictId = QString::fromStdString( dict->getId() );
    if ( mutedDictionaries->contains( dictId ) ) {
      temp.insert( dictId );
    }
  }
  *mutedDictionaries = temp;
}

const Group * Groups::findGroup( unsigned id ) const
{
  for ( unsigned x = 0; x < size(); ++x ) {
    if ( operator[]( x ).id == id ) {
      return &( operator[]( x ) );
    }
  }

  return nullptr;
}

void complementDictionaryOrder( Group & group,
                                const Group & inactiveDictionaries,
                                const vector< sptr< Dictionary::Class > > & dicts )
{
  set< string, std::less<> > presentIds;

  for ( unsigned x = group.dictionaries.size(); x--; ) {
    presentIds.insert( group.dictionaries[ x ]->getId() );
  }

  for ( unsigned x = inactiveDictionaries.dictionaries.size(); x--; ) {
    presentIds.insert( inactiveDictionaries.dictionaries[ x ]->getId() );
  }

  for ( const auto & dict : dicts ) {
    if ( presentIds.find( dict->getId() ) == presentIds.end() ) {
      group.dictionaries.push_back( dict );
    }
  }
}

void updateNames( Config::Group & group, const vector< sptr< Dictionary::Class > > & allDictionaries )
{

  for ( unsigned x = group.dictionaries.size(); x--; ) {
    const std::string id = group.dictionaries[ x ].id.toStdString();

    for ( unsigned y = allDictionaries.size(); y--; ) {
      if ( allDictionaries[ y ]->getId() == id ) {
        group.dictionaries[ x ].name = QString::fromUtf8( allDictionaries[ y ]->getName().c_str() );
        break;
      }
    }
  }
}

void updateNames( Config::Groups & groups, const vector< sptr< Dictionary::Class > > & allDictionaries )
{
  for ( auto & group : groups ) {
    updateNames( group, allDictionaries );
  }
}

void updateNames( Config::Class & cfg, const vector< sptr< Dictionary::Class > > & allDictionaries )
{
  updateNames( cfg.dictionaryOrder, allDictionaries );
  updateNames( cfg.inactiveDictionaries, allDictionaries );
  updateNames( cfg.groups, allDictionaries );
}

QIcon iconFromData( const QByteArray & iconData )
{
  QDataStream stream( iconData );

  QIcon result;

  stream >> result;

  return result;
}

} // namespace Instances