#ifndef DocumentClassModel_h
#define DocumentClassModel_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 "ListModel.h"
#include "DocumentClass.h"

#include <QIcon>
#include <QHash>

#include <array>

//* DocumentClass model. Stores file information for display in lists
class DocumentClassModel : public ListModel<DocumentClass, DocumentClass::WeakEqualFTor>, private Base::Counter<DocumentClassModel>
{

    //* Qt meta object declaration
    Q_OBJECT;

    public:

    //* constructor
    explicit DocumentClassModel(QObject* = nullptr);

    //* column type enumeration
    enum ColumnType
    {
        Name,
        FileName,
        nColumns
    };

    //*@name methods reimplemented from base class
    //@{

    //* flags
    Qt::ItemFlags flags( const QModelIndex& ) const override;

    // return data for a given index
    QVariant data( const QModelIndex&, int ) const override;

    //* header data
    QVariant headerData( int, Qt::Orientation, int = Qt::DisplayRole) const override;

    //* number of columns for a given index
    int columnCount(const QModelIndex& = QModelIndex() ) const override
    { return nColumns; }

    //@}

    protected:

    //* sort
    void _sort( int, Qt::SortOrder ) override;

    private Q_SLOTS:

    //* configuration
    void _updateConfiguration();

    private:

    //* list column names
    const std::array<QString, nColumns> columnTitles_ =
    {{
        tr( "Name" ),
        tr( "File" )
    }};

    //* used to sort IconCaches
    class SortFTor: public ItemModel::SortFTor
    {

        public:

        //* constructor
        explicit SortFTor( int type, Qt::SortOrder order ):
            ItemModel::SortFTor( type, order )
        {}

        //* prediction
        bool operator() ( const DocumentClass&, const DocumentClass& ) const;

    };

    //* icon
    static const QIcon& _icon( const QString& );

    //* icon cache
    using IconCache = QHash<QString, QIcon>;

    //* type icon cache
    static IconCache& _icons();

};

#endif