/***************************************************************************

    source::worx xtree
    Copyright © 2024-2025 c.holzheuer
    christoph.holzheuer@gmail.com

    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.

***************************************************************************/


#ifndef XQVIEWMODEL_H
#define XQVIEWMODEL_H

#include <QUndoStack>
#include <QMenu>
#include <QStandardItemModel>
#include <QAbstractItemView>
#include <QtQmlIntegration>

#include <xqsimpleclipboard.h>
#include <xqmodelsectionlist.h>
#include <xqitemfactory.h>
#include <xqcontextmenu.h>


class XQTreeTable;
class XQItem;
class XQCommand;


//! ein erweitertes QStandardItemModel welches 'seine' view bereits enthält.

class XQViewModel : public QStandardItemModel
{
  Q_OBJECT
  QML_ELEMENT

public:

  XQViewModel(QObject* parent = nullptr);
  virtual ~XQViewModel() = default;

   QHash<int, QByteArray> roleNames() const override;

  XQTreeTable* treeTable();
  virtual void setTreeTable( XQTreeTable* mainView );

  QUndoStack* undoStack();
  void setUndoStack( QUndoStack* undoStack );

  virtual void initModel( const QString& modelName);

  //little helpers
  const XQItem& xqRootItem();

  XQItem&       xqItemFromIndex(const QModelIndex& index) const;
  XQItem&       xqFirstItem(int row) const;

  // undo-/redo-able stuff

  virtual void cmdToggleSection( const XQCommand& command );
  virtual void cmdCut( const XQCommand& command );
  virtual void cmdCutUndo( const XQCommand& command );
  virtual void cmdPaste( const XQCommand& command );
  virtual void cmdPasteUndo( const XQCommand& command );
  virtual void cmdDelete( const XQCommand& command );
  virtual void cmdDeleteUndo( const XQCommand& command );
  virtual void cmdNew( const XQCommand& command );
  virtual void cmdNewUndo( const XQCommand& command );



  /*!

  Derzeit wird die default-implementierung von data/setData genutzt. hier wäre dann die
  Stelle um setData & data an externe 'handler' umzubiegen, siehe giovannies 'model-injection'

  QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override
  {
    return QStandardItemModel::data( index, role );
  }

  bool setData(const QModelIndex& index, const QVariant& value, int role = Qt::EditRole) override
  {
    qDebug() << " --- setData: " << value.toString();
    return QStandardItemModel::setData( index, value, role );
  }

  */

public slots:

  virtual void onShowContextMenu(const QPoint& point);
  virtual void onActionTriggered(QAction* action);

  // handle XQCommands ( == UndoCommand )
  virtual void onCommandRedo( const XQCommand& command );
  virtual void onCommandUndo( const XQCommand& command );

signals:

  void itemCreated( XQItem* newItem );
  void sectionCreated( const XQModelSection& section );
  void sectionToggled( const XQModelSection& section );

protected:

  void addSection(const XQItemList& list, const XQNodePtr& sheetNode );
  virtual void initContextMenu(){}

  // __fixme: should be created from xml
  virtual void setupViewProperties();

protected:

  using MemCall    = void (XQViewModel::*)(const XQCommand&);
  using MemCallMap = QMap<XQCommand::CmdType,MemCall>;

  // das eine reference auf ein globales singleton
  XQItemFactory&        _itemFactory;
  XQSimpleClipBoard     _clipBoard;
  XQModelSectionList    _sections;

  XQTreeTable*       _treeTable{};
  //QAbstractItemView* _treeTable{};
  QUndoStack*       _undoStack{};
  XQContextMenu*    _contextMenu{};

  //! Die Modelbeschreibung
  XQNodePtr      _modelSheet{};
  //! Der eigentliche Inhalt
  XQNodePtr      _contentRoot{};

};

#endif // XQVIEWMODEL_H