/* ****************************************************************************
  This file is part of KBabel

  Copyright (C) 2000 by Matthias Kiefer
                            <matthias.kiefer@gmx.de>
		2003 by Stanislav Visnovsky
			    <visnovsky@kde.org>

  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.

  In addition, as a special exception, the copyright holders give
  permission to link the code of this program with any edition of
  the TQt library by Trolltech AS, Norway (or with modified versions
  of TQt that use the same license as TQt), and distribute linked
  combinations including the two.  You must obey the GNU General
  Public License in all respects for all of the code used other than
  TQt. If you modify this file, you may extend this exception to
  your version of the file, but you are not obligated to do so.  If
  you do not wish to do so, delete this exception statement from
  your version.
	    
**************************************************************************** */
#include <klocale.h>
#include <kapplication.h>
#include <kcmdlineargs.h>
#include <kstaticdeleter.h>
#include <kdebug.h>
#include <kglobal.h>
#include <kinstance.h>
#include <kio/netaccess.h>

#include <tqregexp.h>
#include <tqtextstream.h>
#include <tqtimer.h>

#include "resources.h"
#include "compendiumdata.h"
#include "pocompendium.h"
#include "preferenceswidget.h"
#include "pc_factory.h"

#include <catalog.h>
#include <catalogitem.h>

// ngram length and minimal matching for fuzzy search
#define NGRAM_LEN 3
#define LIM_NGRAM 50  

using namespace KBabel;

static KStaticDeleter< TQDict<CompendiumData> > compDataDeleter;
TQDict<CompendiumData> *PoCompendium::_compDict = 0;

PoCompendium::PoCompendium(TQObject *parent, const char *name)
        : SearchEngine(parent, name)
{
    prefWidget=0;
    data=0;
    error=false;
    stop=false;
    active=false;
    initialized=false;
    loading=false;

    langCode = KGlobal::locale()->language();

    caseSensitive = false;
    ignoreFuzzy=true;
    wholeWords=true;

    matchEqual = true;
    matchNGram = true;
    matchIsContained = false;
    matchContains = true;
    matchWords=true;


    loadTimer = new TQTimer(this);
    connect(loadTimer,TQT_SIGNAL(timeout()),this,TQT_SLOT(slotLoadCompendium()));
}

PoCompendium::~PoCompendium()
{
    if(isSearching())
    {
        stopSearch();
    }

    unregisterData();
}

bool PoCompendium::isReady() const
{
    return (isSearching() || !error);
}


bool PoCompendium::isSearching() const
{
    return (active || loading);
}


void PoCompendium::saveSettings(KConfigBase *config )
{
    if(autoUpdate && prefWidget && prefWidget->settingsChanged())
    {
        applySettings();
    }
        
    config->writeEntry("CaseSensitive",caseSensitive);
    config->writeEntry("IgnoreFuzzy", ignoreFuzzy);
    config->writeEntry("WholeWords", wholeWords);

    config->writeEntry("MatchEqual", matchEqual);
    config->writeEntry("MatchIsContained",matchIsContained);
    config->writeEntry("MatchContains", matchContains);
    config->writeEntry("MatchWords", matchWords);
    config->writeEntry("MatchNGram", matchNGram);  

    config->writeEntry("Compendium", url);
}

void PoCompendium::readSettings(KConfigBase *config)
{    
    caseSensitive = config->readBoolEntry("CaseSensitive", false);
    ignoreFuzzy = config->readBoolEntry("IgnoreFuzzy",true);
    wholeWords = config->readBoolEntry("WholeWords",true);

    matchEqual = config->readBoolEntry("MatchEqual", true);
    matchIsContained = config->readBoolEntry("MatchIsContained", false);
    matchContains = config->readBoolEntry("MatchContains",true);
    matchWords = config->readBoolEntry("MatchWords",true);
    matchNGram = config->readBoolEntry("MatchNGram",true);  

    TQString newPath = config->readEntry("Compendium","http://i18n.kde.org/po_overview/@LANG@.messages");
    if(!initialized)
    {
        url = newPath;
    }
    else if(newPath != url)
    {
        url = newPath;
        loadCompendium();
    }

            
    restoreSettings();
}

PrefWidget *PoCompendium::preferencesWidget(TQWidget *parent)
{
    prefWidget = new CompendiumPreferencesWidget(parent,"pocompendium_prefwidget");
    kdDebug(KBABEL_SEARCH) << "PreferencesWidget is " << prefWidget << endl;
    connect(prefWidget, TQT_SIGNAL(applySettings()), this, TQT_SLOT(applySettings()));
    connect(prefWidget, TQT_SIGNAL(restoreSettings())
                    , this, TQT_SLOT(restoreSettings()));

    restoreSettings();
    
    return prefWidget;
}

const KAboutData *PoCompendium::about() const
{
    return PcFactory::instance()->aboutData();
}


TQString PoCompendium::name() const
{
    return i18n("PO Compendium");
}

TQString PoCompendium::id() const
{
    return "pocompendium";
}

TQString PoCompendium::lastError()
{
    return errorMsg;
}

bool PoCompendium::searchExact(const TQString& text, uint pluralForm, TQPtrList<SearchResult>& results, TQValueList<int>& foundIndices, TQValueList<int>& )
{
    const int *index = data->exactDict(text);
    if(index)
    {
        foundIndices.append(*index);

        SearchResult *result = new SearchResult;
        result->requested = text;
        result->found = data->catalog()->msgid(*index);
#warning	kdWarning() << "PoCompendium can't return plural form translation" << endl;
        result->translation = data->catalog()->msgstr(*index).first();
        result->score = 100;

        TranslationInfo *info = new TranslationInfo;
        info->location = directory(realURL,0);
        info->translator = catalogInfo.lastTranslator;
        info->description = data->catalog()->comment(*index);
        result->descriptions.append(info);

	addResult(result, results);
	return true;
    }
    
    return false;

}

bool PoCompendium::searchCaseInsensitive(const TQString& text, uint pluralForm, TQPtrList<SearchResult>& results, TQValueList<int>& foundIndices, TQValueList<int>& )
{
    TQString searchStr = text.lower();
    
    const TQValueList<int> *indexList = data->allDict(text.lower());
    if(indexList)
    {
        TQValueList<int>::ConstIterator it;
        for( it = indexList->begin(); it != indexList->end(); ++it )
        {
            if(foundIndices.contains(*it))
            {
                continue;
            }

            if(ignoreFuzzy && data->catalog()->isFuzzy(*it))
            {
                continue;
            }


            TQString origStr = data->catalog()->msgid(*it).first();
            origStr = CompendiumData::simplify(origStr);
        
           
            if(!caseSensitive)
            {
                origStr = origStr.lower();
            }

            if(origStr==searchStr)
            {
                foundIndices.append(*it);

                SearchResult *result = new SearchResult;
                result->requested = text;
                result->found = data->catalog()->msgid(*it);
                result->translation = *(data->catalog()->msgstr(*it).at(pluralForm));
                result->score = score(result->requested,*(result->found.at(pluralForm)));

                TranslationInfo *info = new TranslationInfo;
                info->location = directory(realURL,0);
                info->translator = catalogInfo.lastTranslator;
                info->description = data->catalog()->comment(*it);
                result->descriptions.append(info);
		
		addResult(result, results);
		return true;
            }
        }
    }
    return false;
}

bool PoCompendium::searchTextOnly(const TQString& text, uint pluralForm, TQPtrList<SearchResult>& results, TQValueList<int>& foundIndices, TQValueList<int>& )
{
    TQString searchStr = text.lower();
    TQString t = text;
    t.remove( " " );

    const TQValueList<int> *indexList = data->textonlyDict(t.lower());
    if(indexList)
    {
        TQValueList<int>::ConstIterator it;
        for( it = indexList->begin(); it != indexList->end(); ++it )
        {
            if(foundIndices.contains(*it))
            {
                continue;
            }

            if(ignoreFuzzy && data->catalog()->isFuzzy(*it))
            {
                continue;
            }


            TQString origStr = data->catalog()->msgid(*it).first();
            origStr = CompendiumData::simplify(origStr);
        
           
            foundIndices.append(*it);

            SearchResult *result = new SearchResult;
            result->requested = text;
            result->found = data->catalog()->msgid(*it).first();
#warning	    kdWarning() << "PoCompendium can't return plural form translation" << endl;
            result->translation = data->catalog()->msgstr(*it).first();
            result->score = score(result->requested,*(result->found.at(pluralForm)));

            TranslationInfo *info = new TranslationInfo;
            info->location = directory(realURL,0);
            info->translator = catalogInfo.lastTranslator;
            info->description = data->catalog()->comment(*it);
            result->descriptions.append(info);
		
	    addResult(result, results);
	    return true;
        }
    }
    return false;
}

bool PoCompendium::searchWords(const TQString& searchStr, uint pluralForm, TQPtrList<SearchResult>& results, TQValueList<int>& foundIndices, TQValueList<int>& checkedIndices )
{
    uint checkCounter = 0;
    bool foundResults = false;
    
    TQStringList wList = CompendiumData::wordList(searchStr);
    for ( TQStringList::Iterator wit = wList.begin()
               ; wit != wList.end(); ++wit ) 
    {
        if(stop)
            break;

        const TQValueList<int> *indexList = data->wordDict((*wit).lower());
        if(indexList)
        {
            TQValueList<int>::ConstIterator it;
            for( it = indexList->begin(); it != indexList->end(); ++it )
            {
                if(stop)
                    break;
                
                if(foundIndices.contains(*it))
                {
                    continue;
                }
              
                if(checkedIndices.contains(*it))
                {
                    continue;
                }
                
                checkedIndices.append(*it);
                checkCounter++;

                if(ignoreFuzzy && data->catalog()->isFuzzy(*it))
                {
                    continue;
                }
 
                if( (100*(checkCounter+1))%catalogInfo.total < 100)
                {
                    emit progress( (50*checkCounter+1)/catalogInfo.total);
                }
            
                kapp->processEvents(100);

                TQString origStr = data->catalog()->msgid(*it).first();
                origStr = CompendiumData::simplify(origStr);

           
                if(!caseSensitive)
                {
                    origStr = origStr.lower();
                }

                bool found = false;
                if(matchWords)
                {
                    if(!caseSensitive)
                    {
                        found=true;
                    }
                    else
                    {
                        TQString s=*wit;
                        TQString o=origStr;
                        
                        if(wholeWords)
                        {
                            s=" "+*wit+" ";
                            o=" "+origStr+" ";
                        }
                        if(o.contains(s))
                        {
                            found=true;
                        }
                    }
                }

                
                if(!found && origStr==searchStr)
                {
                    found =true;
                }
                 
                // if there is an string which just contains ignored characters,
                // continue
                if(!found && origStr.isEmpty() || 
                    (origStr.length() == 1 && searchStr.length() > 1))
                {
                    continue;
                }
            

                if(!found && matchContains && !wholeWords)
                {
                    TQString s=maskString(searchStr);
                    TQRegExp searchReg(s);

                    if(searchReg.search(origStr) >= 0)
                        found=true;
                }
            
                if(!found && matchIsContained && !wholeWords)
                {
                    TQString s=maskString(origStr);
                    TQRegExp reg(s);

                    if(reg.search(searchStr) >= 0)
                    {
                        found = true;
                    }
                }
                if(!found && matchWords && !wholeWords)
                {
                    TQStringList list = CompendiumData::wordList(searchStr);
                    
                    for ( TQStringList::Iterator wit2 = list.begin()
                       ; wit2 != list.end(); ++wit2 ) 
                    {
                        TQString s=maskString(*wit2);
                        TQRegExp reg(s);

                        if(reg.search(origStr) >= 0)
                        {
                            found = true;
                        }
                    }
                }

                if(found)
                {
                    foundIndices.append(*it);

                    SearchResult *result = new SearchResult;
                    result->requested = searchStr; // FIXME:here should be the original text
                    result->found = data->catalog()->msgid(*it).first();
#warning		    kdWarning() << "PoCompendium can't return plural form translation" << endl;
                    result->translation = data->catalog()->msgstr(*it).first();
                    result->score = score(result->requested,*(result->found.at(pluralForm)));

                    TranslationInfo *info = new TranslationInfo;
                    info->location = directory(realURL,0);
                    info->translator = catalogInfo.lastTranslator;
                    info->description = data->catalog()->comment(*it);
                    result->descriptions.append(info);
 
                    addResult(result, results);
		    
		    foundResults = true;
                }
            }
        }
    }
    
    return foundResults;
}

bool PoCompendium::searchNGram(const TQString& searchStr, uint pluralForm, TQPtrList<SearchResult>& results, TQValueList<int>& foundIndices, TQValueList<int>& checkedIndices )
{
    uint checkCounter = 0;
    bool foundResults = false;
    
    TQRegExp searchReg;
    if(matchContains)
    {
        TQString s=maskString(searchStr);
        searchReg.setPattern(s);
    }

        
    bool breakLoop=false;
    int i=-1;
    while(!breakLoop)    
    {
        if(stop)
        {
    	    breakLoop=true;
            break;
        }

	i++;
            
        if(i >= catalogInfo.total)
        {
            breakLoop = true;
            break;
        }
        
        if( (100*(checkCounter+1))%catalogInfo.total < 100)
        {
            emit progress( 50+(50*(checkCounter+1))/catalogInfo.total);
        }

        if(checkedIndices.contains(i))
        {
            continue;
        }

        checkedIndices.append(i);
        checkCounter++;
  
        if(ignoreFuzzy && data->catalog()->isFuzzy(i))
        {
    	     continue;
        }
        
        if(foundIndices.contains(i))
        {
            continue;
        }
       
        kapp->processEvents(100);

        TQString origStr = data->catalog()->msgid(i).first();
        origStr = CompendiumData::simplify(origStr);
            
        if(!caseSensitive)
        {
            origStr = origStr.lower();
        }

 
        // if there is an string which just contains ignored characters,
        // continue
        if(origStr.isEmpty() || 
                    (origStr.length() == 1 && searchStr.length() > 1))
        {
            continue;
        }
            
        bool found = false;
        if(matchContains && searchReg.search(origStr) >= 0)
        {
            found=true;
        }

        if(!found && matchIsContained)
        {
            TQString s=maskString(origStr);
            TQRegExp reg(s);

            if(reg.search(searchStr) >= 0)
            {
                found = true;
            }
        }

        if(!found && matchWords)
        {
            TQStringList list = CompendiumData::wordList(searchStr);
                    
            for ( TQStringList::Iterator wit2 = list.begin()
                   ; wit2 != list.end(); ++wit2 ) 
            {
                TQString s=maskString(*wit2);

                if(wholeWords)
                {
                    origStr = " "+origStr+" ";
                    s=" "+s+" ";
                }
                TQRegExp reg(s);
                    
                if(reg.search(origStr) >= 0)
                {
                    found = true;
                }
            }
        }

	if(!found && matchNGram)
	{
		// to get more results one could
		// interchange searchStr and origStr when
		// the latter is shorter

	    found = ( ngramMatch(searchStr,origStr,NGRAM_LEN) 
			  > LIM_NGRAM );
	}
       
        if(found)
        {
            foundIndices.append(i);

            SearchResult *result = new SearchResult;
            result->requested = searchStr;
            result->found = data->catalog()->msgid(i).first();
            result->translation = data->catalog()->msgstr(i).first();
#warning	    kdWarning() << "PoCompendium can't return plural form translation" << endl;
            result->score = score(result->requested,*(result->found.at(pluralForm)));

            TranslationInfo *info = new TranslationInfo;
            info->location = directory(realURL,0);
            info->translator = catalogInfo.lastTranslator;
            info->description = data->catalog()->comment(i);
            result->descriptions.append(info);
    
            addResult(result, results);
	    
	    foundResults = true;
        }
    }
    
    return foundResults;
}

bool PoCompendium::startSearch(const TQString& text, uint pluralForm, const SearchFilter* filter)
{
    if(autoUpdate && prefWidget && prefWidget->settingsChanged())
    {
        applySettings();
    }
 
    if(isSearching())
        return false;

    clearResults();
    stop = false;
    active = true;

    if(!initialized)
    {
        if(loadTimer->isActive())
            loadTimer->stop();

        slotLoadCompendium();
    }
    
    if(error || !data)
    {
        active = false;
        return false;
    }

    if(data->active())
    {
        active = false;
        return true;
    }
   
    emit started();


    TQValueList<int> foundIndices;
    TQValueList<int> checkedIndices;
    
    // first, exact search
    searchExact(text, pluralForm, results, foundIndices, checkedIndices);
    
    TQString searchStr=CompendiumData::simplify(text);
    
           
    if(!caseSensitive)
    {
         searchStr = searchStr.lower();

	// do case insensite search if necessary
	searchCaseInsensitive(searchStr, pluralForm, results, foundIndices, checkedIndices);
    }
    
    // search without whitespace
    searchTextOnly(searchStr, pluralForm, results, foundIndices, checkedIndices);
    
    // now, search based on words (contains, is contained, etc)
    searchWords(searchStr, pluralForm, results, foundIndices, checkedIndices);
 
    
    if( matchNGram || 
	(!wholeWords && (matchContains || matchIsContained || matchWords))
	)
    {
	// search based on ngrams
	searchNGram(searchStr, pluralForm, results, foundIndices, checkedIndices);
    } 
    
    emit progress(100);

    active = false;
    stop = false;
    emit finished();
    
    return true;
}

void PoCompendium::stopSearch()
{
    stop=true;
}


void PoCompendium::applySettings()
{    
    if(!prefWidget)
        return;
    
    if(isSearching())
        stopSearch();
    
    caseSensitive = prefWidget->caseSensitive();
    ignoreFuzzy = prefWidget->ignoreFuzzy();
    wholeWords = prefWidget->wholeWords();

    matchEqual = prefWidget->matchEqual();
    matchNGram = prefWidget->matchNGram();
    matchIsContained = prefWidget->matchIsContained();
    matchContains = prefWidget->matchContains();
    matchWords = prefWidget->matchWords();

    
    bool needLoading=false;
    
    
    TQString newPath = prefWidget->url();
    if(!initialized)
    {
        url = newPath;
    }
    else if(newPath != url)
    {
        url = newPath;
        needLoading = true;
    }

    if(needLoading)
    {
        loadCompendium();
        initialized=false;
    }
}

void PoCompendium::restoreSettings()
{
    if(!prefWidget)
        return;
    
    prefWidget->setCaseSensitive(caseSensitive);
    prefWidget->setIgnoreFuzzy(ignoreFuzzy);
    prefWidget->setWholeWords(wholeWords);
    prefWidget->setURL(url);

    prefWidget->setMatchEqual(matchEqual);
    prefWidget->setMatchNGram(matchNGram);
    prefWidget->setMatchIsContained(matchIsContained);
    prefWidget->setMatchContains(matchContains);
    prefWidget->setMatchWords(matchWords);
}
    
void PoCompendium::loadCompendium()
{
    if(!loading && !loadTimer->isActive())
        loadTimer->start(100,true);
}

void PoCompendium::slotLoadCompendium()
{
    if(loading)
        return;

    if(loadTimer->isActive())
        loadTimer->stop();
    
    loading = true;

    if(data)
    {
        unregisterData();
    }


    TQString path=url;
   
    if(path.contains("@LANG@"))
    {
        path.replace("@LANG@",langCode);
    }
    KURL u=KCmdLineArgs::makeURL(path.local8Bit());
    realURL = u.url();
  
    registerData();
    

    if(!data)
    {
        kdError() << "no data object in pocompendium?" << endl;

        loading=false;
        return;
    }

    if(!data->initialized())
    {
        if(!data->active())
        {
            data->load(u);
            recheckData();
            if(error)
            {
                emit hasError(errorMsg);
            }
        }
        else
        {
            connect(data, TQT_SIGNAL(progressEnds()), this, TQT_SLOT(recheckData()));
        }
    }
    else
    {
        recheckData();
        if(error)
        {
            emit hasError(errorMsg);
        }
    }

    initialized=true;
}

void PoCompendium::recheckData()
{
    if(data)
    {
        disconnect(data, TQT_SIGNAL(progressEnds()), this, TQT_SLOT(recheckData()));

        error = data->hasErrors();
        errorMsg = data->errorMsg();

        if(!error)
        {
            catalogInfo = Catalog::headerInfo(data->catalog()->header());
            catalogInfo.total = data->catalog()->numberOfEntries();
            catalogInfo.fuzzy = data->catalog()->numberOfFuzzies();
            catalogInfo.untranslated = data->catalog()->numberOfUntranslated();
        }
    }

    loading=false;
}

TQString PoCompendium::maskString(TQString s)
{
    s.replace("\\","\\\\");
    s.replace("\?","\\?");
    s.replace("[","\\[");
    s.replace(".","\\.");
    s.replace("*","\\*");
    s.replace("+","\\+");
    s.replace("^","\\^");
    s.replace("$","\\$");
    s.replace("(","\\(");
    s.replace(")","\\)");
    s.replace("{","\\{");
    s.replace("}","\\}");
    s.replace("|","\\|");
    
    return s;
}

void PoCompendium::addResult(SearchResult *result, TQPtrList<SearchResult>& res)
{
    if(res.last() && res.last()->score >= result->score)
    {
        res.append(result);
    }
    else
    {
        SearchResult *sr;
        for(sr = res.first(); sr != 0; sr=res.next())
        {
            if(sr->score < result->score)
            {
		int pos = res.at();
		if( pos < 0 ) pos = 0;
                res.insert( pos,result);
                emit resultsReordered();
                break;
            }
        }

        if(!sr)
        {
             res.append(result);
        }
    }

    emit numberOfResultsChanged(res.count());
    emit resultFound(result);
}


void PoCompendium::setLanguageCode(const TQString& lang)
{   
    if(initialized && url.contains("@LANG@") && lang!=langCode 
            && !loadTimer->isActive() )
    {
        initialized=false;
    }
    
    langCode=lang;
}

TQString PoCompendium::translate(const TQString& text, uint pluralForm)
{
    if(!initialized)
    {
        if(loadTimer->isActive())
            loadTimer->stop();

        slotLoadCompendium();
    }
    
    if(error || !data || data->active())
    {
        return TQString();
    }
   

    const int *index = data->exactDict(text);

    if(index)
    {
#warning	kdWarning() << "PoCompendium can't return plural form translation" << endl;
        return data->catalog()->msgstr(*index).first();
    }
   
    return TQString();
}

TQString PoCompendium::fuzzyTranslation(const TQString& text, int &score, const uint pluralForm)
{
  if(!initialized)
    {
      if(loadTimer->isActive())
	loadTimer->stop();

      slotLoadCompendium();
    }
    
  if(error || !data || data->active())
    {
      return TQString();
    }
    
  // try to find fuzzy string
  bool breakLoop = false;
  stop = false;
  int i=-1;
  int best_matching = -1;
  int best_match = 0;
  int total = data->catalog()->numberOfEntries();
 
  TQString searchStr = CompendiumData::simplify(text);

  //kdDebug(750) << "find best match for " << searchStr << endl;

  while(!breakLoop)
    {

      // progress and loop control
      if(stop)
	{
	  breakLoop=true;
	  break;
	}

      i++;

      if(i >= total)
	{
	  breakLoop = true;
	  break;
	}

      if( (100*(i+1))%total < 100)
	{
	  emit progress( (100*(i+1))/total);
	}

      // get a message from the catalog FIXME: plurals
      TQString origStr = data->catalog()->msgid(i).first();
      origStr = CompendiumData::simplify(origStr);

      // don't match too long strings for short search string
      if (origStr.length() > 2*searchStr.length())
	continue;
      //      kdDebug(750) << i << ": matching " << origStr << endl;

      int ngram_result = ngramMatch(searchStr,origStr);

      if (ngram_result > best_match) {
	best_match = ngram_result;
	best_matching = i;

	// kdDebug(750) << "[" << ngram_result << "] " << text << "-"
	// << origStr << endl;
      }
    }

  if (best_match > LIM_NGRAM) {
    score = best_match;
#warning    kdWarning() << "PoCompendium can't return plural form translation" << endl;
    return data->catalog()->msgstr(best_matching).first();
  }
 
  return TQString();
}


TQString PoCompendium::searchTranslation(const TQString& text, int &sc, const uint pluralForm)
{
    if(autoUpdate && prefWidget && prefWidget->settingsChanged())
    {
        applySettings();
    }
 
    if(isSearching())
        return TQString();

    clearResults();
    stop = false;
    active = true;

    if(!initialized)
    {
        if(loadTimer->isActive())
            loadTimer->stop();

        slotLoadCompendium();
    }
    
    if(error || !data)
    {
        active = false;
        return TQString();
    }

    if(data->active())
    {
        active = false;
        return TQString();
    }
   
    emit started();

    TQPtrList<SearchResult> res;
    
    TQValueList<int> foundIndices;
    TQValueList<int> checkedIndices;
    
    // first, exact search
    if( searchExact(text, pluralForm, res, foundIndices, checkedIndices) )
    {
	active = false;
	stop = false;
	emit finished();

	// found, this is the best
	sc = res.first()->score;
	return res.first()->translation;
    }
    
    TQString searchStr=CompendiumData::simplify(text);
    
           
    if(!caseSensitive)
    {
        searchStr = searchStr.lower();

	// do case insensite search if necessary
	if( searchCaseInsensitive(searchStr, pluralForm, res, foundIndices, checkedIndices) )
	{
	    active = false;
	    stop = false;
	    emit finished();
	    
	    // found, return this one
	    sc = res.first()->score;
	    return res.first()->translation;
	}
    }
    
    // search without whitespace
    TQString s = searchStr;
    s.remove( ' ' );
    if( searchTextOnly(s, pluralForm, res, foundIndices, checkedIndices) )
    {
	active = false;
	stop = false;
	emit finished();

	// found, return this one
	sc = res.first()->score;
	return res.first()->translation;
    }
    
    // now, search based on words (contains, is contained, etc)
    searchWords(searchStr, pluralForm, res, foundIndices, checkedIndices);
    
    if( matchNGram || 
	(!wholeWords && (matchContains || matchIsContained || matchWords))
	)
    {
	// search based on ngrams
	searchNGram(searchStr, pluralForm, res, foundIndices, checkedIndices);
    }
    
    active = false;
    stop = false;

    // now, pick up the best one from not exact translations
    if( res.count() > 0 ) {

	emit finished();

	sc = res.first()->score;
	return res.first()->translation;
    }
    
    sc = 0;
    
    return TQString();
}


void PoCompendium::unregisterData()
{
    if(data)
    { 
        disconnect(data, TQT_SIGNAL(progressStarts(const TQString&)), this
            , TQT_SIGNAL(progressStarts(const TQString&)));
        disconnect(data, TQT_SIGNAL(progressEnds()), this , TQT_SIGNAL(progressEnds()));
        disconnect(data, TQT_SIGNAL(progress(int)), this , TQT_SIGNAL(progress(int)));

        if(data->active())
        {
            disconnect(data,TQT_SIGNAL(progressEnds()),this,TQT_SLOT(recheckData()));
        }

        if(data->unregisterObject(this))
        {
            if(!data->active())
            {
                compendiumDict()->remove(realURL);
            }
            else
            {
                connect(data,TQT_SIGNAL(progressEnds()),this,TQT_SLOT(removeData()));
            }
        }

        data=0;
    }
}

void PoCompendium::registerData()
{
    data = compendiumDict()->find(realURL);
    if(!data)
    {
        data = new CompendiumData;
        compendiumDict()->insert(realURL,data);
    }

    data->registerObject(this);
    
    if(data->active())
    {
        emit progressStarts(i18n("Loading PO compendium"));
    }
    
    connect(data, TQT_SIGNAL(
    progressStarts(const TQString&)), this
            , TQT_SIGNAL(progressStarts(const TQString&)));
    connect(data, TQT_SIGNAL(progressEnds()), this , TQT_SIGNAL(progressEnds()));
    connect(data, TQT_SIGNAL(progress(int)), this , TQT_SIGNAL(progress(int)));
}

void PoCompendium::removeData()
{
    const TQObject *s=TQT_TQOBJECT(const_cast<TQT_BASE_OBJECT_NAME*>(sender()));
    if(s && s->inherits("CompendiumData"))
    {
        const CompendiumData *d=static_cast<const CompendiumData*>(s);
        if(d)
        {
            TQDictIterator<CompendiumData> it(*compendiumDict());
            while(it.current())
            {
                if(it.current() == d)
                {
                    if(!d->hasObjects())
                    {
                        compendiumDict()->remove(it.currentKey());
                    }

                    break;
                }

                ++it;
            }
        }
        
    }
}

TQDict<CompendiumData> *PoCompendium::compendiumDict()
{
    if(!_compDict)
    {
        _compDict=compDataDeleter.setObject( new TQDict<CompendiumData> );
        _compDict->setAutoDelete(true);
    }

    return _compDict;
}



#include "pocompendium.moc"
