/*
	Copyright 2006-2020 The QElectroTech Team
	This file is part of QElectroTech.

	QElectroTech 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.

	QElectroTech 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 QElectroTech. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef DYNAMICELEMENTTEXTMODEL_H
#define DYNAMICELEMENTTEXTMODEL_H

#include <QStandardItemModel>
#include <qstyleditemdelegate.h>
#include "dynamicelementtextitem.h"

class QUndoCommand;
class ElementTextItemGroup;
class Element;

/**
	@brief The DynamicElementTextModel class
	A model to use with QtView.
	This model display and can edit the value of dynamic text of an element.
	Set the delegate DynamicTextItemDelegate as delegate of this model.
*/
class DynamicElementTextModel : public QStandardItemModel
{
	Q_OBJECT
	
	public:
	enum ValueType {
		textFrom =1,
		userText,
		infoText,
		compositeText,
		txtAlignment,
		size,
		font,
		color,
		pos,
		frame,
		rotation,
		textWidth,
		grpAlignment,
		grpPos,
		grpRotation,
		grpVAdjust,
		grpName,
		grpHoldBottom,
		grpFrame
	};
	
	DynamicElementTextModel(Element *element, QObject *parent = nullptr);
	~DynamicElementTextModel() override;
	
	bool indexIsInGroup(const QModelIndex &index) const;
	DynamicElementTextItem *textFromIndex(const QModelIndex &index) const;
	DynamicElementTextItem *textFromItem(QStandardItem *item) const;
	QModelIndex indexFromText(DynamicElementTextItem *text) const;
	QUndoCommand *undoForEditedText(
			DynamicElementTextItem *deti,
			QUndoCommand *parent_undo = nullptr) const;
	QUndoCommand *undoForEditedGroup(
			ElementTextItemGroup *group,
			QUndoCommand *parent_undo = nullptr) const;
	
	ElementTextItemGroup *groupFromIndex(const QModelIndex &index) const;
	ElementTextItemGroup *groupFromItem(QStandardItem *item) const;
	QModelIndex indexFromGroup(ElementTextItemGroup *group) const;
	bool indexIsText(const QModelIndex &index) const;
	bool indexIsGroup(const QModelIndex &index) const;
	
	bool canDropMimeData(const QMimeData *data,
			     Qt::DropAction action,
			     int row,
			     int column,
			     const QModelIndex &parent) const override;
	bool dropMimeData(const QMimeData *data,
			  Qt::DropAction action,
			  int row,
			  int column,
			  const QModelIndex &parent) override;
	QMimeData *mimeData(const QModelIndexList &indexes) const override;
	QStringList mimeTypes() const override;
	
	signals:
	void dataChanged();
	
	private:
	QList<QStandardItem *> itemsForText(DynamicElementTextItem *deti);
	void addText(DynamicElementTextItem *deti);
	void removeText(DynamicElementTextItem *deti);
	void addGroup(ElementTextItemGroup *group);
	void removeGroup(ElementTextItemGroup *group);
	void addTextToGroup(DynamicElementTextItem *deti,
			    ElementTextItemGroup *group);
	void removeTextFromGroup(DynamicElementTextItem *deti,
				 ElementTextItemGroup *group);
	void enableSourceText(DynamicElementTextItem *deti,
			      DynamicElementTextItem::TextFrom tf );
	void enableGroupRotationAndPos(ElementTextItemGroup *group);
	void itemDataChanged(QStandardItem *qsi);
	void setConnection(DynamicElementTextItem *deti, bool set);
	void setConnection(ElementTextItemGroup *group, bool set);
	void updateDataFromText(DynamicElementTextItem *deti,
				DynamicElementTextModel::ValueType type);
	void updateDataFromGroup(ElementTextItemGroup *group,
				 DynamicElementTextModel::ValueType type);
	
	private:
	QPointer<Element> m_element;
	QHash <DynamicElementTextItem *, QStandardItem *> m_texts_list;
	QHash <ElementTextItemGroup *, QStandardItem *> m_groups_list;
	QHash <DynamicElementTextItem *,
	QList<QMetaObject::Connection>> m_hash_text_connect;
	QHash <ElementTextItemGroup *,
	QList<QMetaObject::Connection>> m_hash_group_connect;
	bool m_block_dataChanged = false;
};

class DynamicTextItemDelegate : public QStyledItemDelegate
{
	Q_OBJECT
	
	public:
	DynamicTextItemDelegate(QObject *parent = Q_NULLPTR);
	
	QWidget *createEditor(QWidget *parent,
			      const QStyleOptionViewItem &option,
			      const QModelIndex &index) const override;
	void setModelData(QWidget *editor,
			  QAbstractItemModel *model,
			  const QModelIndex &index) const override;
	
	protected:
	bool eventFilter(QObject *object, QEvent *event) override;
	
	private:
	QStringList availableInfo(DynamicElementTextItem *deti) const;
};

#endif // DYNAMICELEMENTTEXTMODEL_H