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** Copyright (C) 2000-2003 Trolltech AS.  All rights reserved.
**
** This file is part of the Qt Assistant.
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** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
** licenses may use this file in accordance with the Qt Commercial License
** Agreement provided with the Software.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
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**********************************************************************/



#ifndef INDEX_H
#define INDEX_H

#include <qstringlist.h>
#include "kvi_pointerhashtable.h"
#include "kvi_pointerlist.h"
#include "kvi_valuelist.h"
#include <qdatastream.h>
#include <qobject.h>

struct Document {
    Document( int d, int f ) : docNumber( d ), frequency( f ) {}
    Document() : docNumber( -1 ), frequency( 0 ) {}
    bool operator==( const Document &doc ) const {
	return docNumber == doc.docNumber;
    }
    bool operator<( const Document &doc ) const {
	return frequency > doc.frequency;
    }
    bool operator<=( const Document &doc ) const {
	return frequency >= doc.frequency;
    }
    bool operator>( const Document &doc ) const {
	return frequency < doc.frequency;
    }
    Q_INT16 docNumber;
    Q_INT16 frequency;
};

QDataStream &operator>>( QDataStream &s, Document &l );
QDataStream &operator<<( QDataStream &s, const Document &l );

class Index : public QObject
{
    Q_OBJECT
public:
    struct Entry {
	Entry( int d ) { documents.append( Document( d, 1 ) ); }
	Entry( KviValueList<Document> l ) : documents( l ) {}
	KviValueList<Document> documents;
    };
    struct PosEntry {
	PosEntry( int p ) { positions.append( p ); }
	KviValueList<uint> positions;
    };
    Index( const QString &dp, const QString &hp );
    Index( const QStringList &dl, const QString &hp );
    void writeDict();
    void readDict();
    int makeIndex();
    QStringList query( const QStringList&, const QStringList&, const QStringList& );
    QString getDocumentTitle( const QString& );
    void setDictionaryFile( const QString& );
    void setDocListFile( const QString& );
    void writeDocumentList();
    void readDocumentList();
    void setupDocumentList();
    const QStringList& documentList() { return docList; };
    const QStringList& titlesList() { return titleList; };
signals:
    void indexingProgress( int );
private slots:
    void setLastWinClosed();
private:
    void parseDocument( const QString&, int );
    void insertInDict( const QString&, int );
    QStringList getWildcardTerms( const QString& );
    QStringList split( const QString& );
    KviValueList<Document> setupDummyTerm( const QStringList& );
    bool searchForPattern( const QStringList&, const QStringList&, const QString& );
    void buildMiniDict( const QString& );
    QStringList docList;
    QStringList titleList;
    KviPointerHashTable<QString,Entry> dict;
    KviPointerHashTable<QString,PosEntry> miniDict;
    uint wordNum;
    QString docPath;
    QString dictFile, docListFile;
    bool alreadyHaveDocList;
    bool lastWindowClosed;
};

struct Term {
    Term( const QString &t, int f, KviValueList<Document> l )
	: term( t ), frequency( f ), documents( l ) {}
    QString term;
    int frequency;
    KviValueList<Document>documents;
};



#define TermList KviPointerList<Term>

#endif