#ifndef ADS_CONTAINERWIDGET_H
#define ADS_CONTAINERWIDGET_H
/*******************************************************************************
** QtAdcancedDockingSystem
** Copyright (C) 2017 Uwe Kindler
**
** 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 3 of the License, or
** (at your option) any later version.
**
** This program 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 <QList>
#include <QHash>
#include <QPointer>
#include <QFrame>
#include <QGridLayout>
#include <QSplitter>

class QPoint;
class QMenu;

#include "ads/API.h"
#include "ads/Internal.h"
#include "ads/SectionContent.h"
#include "ads/FloatingWidget.h"
#include "ads/Serialization.h"
#include "ads/DropOverlay.h"
#include "ads/ContainerWidget.h"

ADS_NAMESPACE_BEGIN
class SectionWidget;
class DropOverlay;
class InternalContentData;



/*!
 * ContainerWidget is the main container to provide the docking
 * functionality. It manages multiple sections with all possible areas.
 */
class ADS_EXPORT_API MainContainerWidget : public CContainerWidget
{
	Q_OBJECT

	friend class SectionContent;
	friend class SectionWidget;
	friend class FloatingWidget;
	friend class SectionTitleWidget;
    friend class ContainerWidgetPrivate;
    friend class CFloatingTitleWidget;
    friend class CContainerWidget;

public:
	explicit MainContainerWidget(QWidget *parent = nullptr);
	virtual ~MainContainerWidget();

	//
	// Public API
	//

	/*!
	 * Completely removes the <em>sc</em> from this ContainerWidget.
	 * This container will no longer hold a reference to the content.
	 * The content can be safely deleted.
	 */
	bool removeSectionContent(const SectionContent::RefPtr& sc);

	/*!
	 * Shows the specific SectionContent in UI.
	 * Independed of the current state, whether it is used inside a section or is floating.
	 */
	bool showSectionContent(const SectionContent::RefPtr& sc);

	/*!
	 * Closes the specified SectionContent from UI.
	 * Independed of the current state, whether it is used inside a section or is floating.
	 */
	bool hideSectionContent(const SectionContent::RefPtr& sc);

	/*!
	 * Selects the specific SectionContent as current, if it is part of a SectionWidget.
	 * If SC is floating, it does nothing (or should we show it?)
	 */
	bool raiseSectionContent(const SectionContent::RefPtr& sc);

	/*!
	 * Indicates whether the SectionContent <em>sc</em> is visible.
	 */
	bool isSectionContentVisible(const SectionContent::RefPtr& sc);

	/*!
	 * Creates a QMenu based on available SectionContents.
	 * The caller is responsible to delete the menu.
	 */
	QMenu* createContextMenu() const;

	/*!
	 * Serializes the current state of contents and returns it as a plain byte array.
	 * \see restoreState(const QByteArray&)
	 */
	QByteArray saveState() const;

	/*!
	 * Deserilizes the state of contents from <em>data</em>, which was written with <em>saveState()</em>.
	 * \see saveState()
	 */
	bool restoreState(const QByteArray& data);

	//
	// Advanced Public API
	// You usually should not need access to this methods
	//
	/*!
	 * \brief contents
	 * \return List of known SectionContent for this ContainerWidget.
	 */
	QList<SectionContent::RefPtr> contents() const;

	/**
	 * Access function for the section drop overlay
	 */
	QPointer<DropOverlay> sectionDropOverlay() const;

	QPointer<DropOverlay> dropOverlay() const;

	static QSplitter* newSplitter(Qt::Orientation orientation = Qt::Horizontal, QWidget* parent = 0);

	virtual unsigned int zOrderIndex() const {return 0;}

private:
	// Serialization
	QByteArray saveHierarchy() const;
	void saveFloatingWidgets(QDataStream& out) const;
	void saveSectionWidgets(QDataStream& out, QWidget* widget) const;

	bool saveSectionIndex(ADS_NS_SER::SectionIndexData &sid) const;

	bool restoreHierarchy(const QByteArray& data);
	bool restoreFloatingWidgets(QDataStream& in, int version, QList<FloatingWidget*>& floatings);
	bool restoreSectionWidgets(QDataStream& in, int version, QSplitter* currentSplitter, QList<SectionWidget*>& sections, QList<SectionContent::RefPtr>& contentsToHide);

	bool takeContent(const SectionContent::RefPtr& sc, InternalContentData& data);
    void hideContainerOverlay();
	void moveFloatingWidget(const QPoint& TargetPos);

private slots:
	void onActionToggleSectionContentVisibility(bool visible);

signals:
	void orientationChanged();

	/*!
	 * Emits whenever the visibility of a SectionContent changes.
	 * \see showSectionContent(), hideSectionContent()
	 * \since 0.2
	 */
	void sectionContentVisibilityChanged(const SectionContent::RefPtr& sc, bool visible);

private:
	QList<FloatingWidget*> m_Floatings;
	QList<CContainerWidget*> m_Containers;
	QHash<int, HiddenSectionItem> m_HiddenSectionContents;

	// Helper lookup maps, restricted to this container.
	QHash<int, SectionContent::WeakPtr> m_SectionContentIdMap;
	QHash<QString, SectionContent::WeakPtr> m_SectionContentNameMap;
	QHash<int, SectionWidget*> m_SectionWidgetIdMap;

	QPointer<DropOverlay> m_ContainerDropOverlay;
	QPointer<DropOverlay> m_SectionDropOverlay;
};


ADS_NAMESPACE_END
#endif