#ifndef RecentFilesMenu_h
#define RecentFilesMenu_h

/******************************************************************************
*
* Copyright (C) 2002 Hugo PEREIRA <mailto: hugo.pereira@free.fr>
*
* This 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 software 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, see <http://www.gnu.org/licenses/>.
*
*******************************************************************************/

#include "Counter.h"
#include "Debug.h"
#include "FileList.h"

#include <QMenu>
#include <QHash>

/**
\class   RecentFilesMenu
\brief   customized popup menu to open a previously opened file
*/
class RecentFilesMenu: public QMenu, private Base::Counter<RecentFilesMenu>
{

    //* Qt meta object declaration
    Q_OBJECT

    public:

    //* constructor
    explicit RecentFilesMenu( QWidget*, FileList& );

    //* check if a file is in database, removes it if yes
    void remove( const QString& file )
    { fileList_->remove( File( file ).expand() ); }

    //* check if a file is in database, adds it if not, select the file
    void select( const QString& file )
    {
        File newFile( File( file ).expand() );
        emit fileSelected( fileList_->add( newFile ) );
    }

    //* open last valid file, returns true if any
    bool openLastValidFile();

    //* current file
    const FileRecord& currentFile() const
    { return currentFile_; }

    Q_SIGNALS:

    //* signal emited when a file is selected
    void fileSelected( FileRecord );

    public Q_SLOTS:

    //* set current file
    void setCurrentFile( const File& file );

    //* set current file
    void setCurrentFile( const FileRecord& file )
    { currentFile_ = file; }

    //* check if a file is in database, adds it if not
    FileRecord& add( const QString& file )
    { return fileList_->add( File( file ) ); }

    //* check if a file is in database, adds it if not
    FileRecord& add( File file )
    { return fileList_->add( file.expand() ); }

    private Q_SLOTS:

    //* update actions
    /** this is trigger by the fileList valid file check completion */
    void _updateActions();

    //* remove unfound files from file list
    void _clean();

    //* open file
    void _open( QAction* );

    //* display files from internal list
    void _loadFiles();

    private:

    //* associated file list
    FileList* fileList_ = nullptr;

    //* store current file (to appear checked in list)
    FileRecord currentFile_;

    //* action group
    QActionGroup* actionGroup_ = nullptr;

    //* clean action
    QAction* cleanAction_ = nullptr;

    //* map actions to file records
    using ActionMap = QHash<QAction*, FileRecord>;

    //* map actions to FileRecords
    ActionMap actions_;

};

#endif