#ifndef ADJUST_THICKNESS_POPUP_H
#define ADJUST_THICKNESS_POPUP_H

// TnzQt includes
#include "toonzqt/dvdialog.h"

// TnzLib includes
#include "toonz/txshsimplelevel.h"

// TnzCore includes
#include "tvectorimage.h"

// STD includes
#include <vector>
#include <set>

//=====================================================

//    Forward declarations

class TSelection;

namespace DVGui
{
class MeasuredDoubleField;
}

class QPushButton;
class QComboBox;

//=====================================================

//*****************************************************************************
//    Adjust Thickness Popup  declaration
//*****************************************************************************

class AdjustThicknessPopup : public DVGui::Dialog
{
	Q_OBJECT

public:
	AdjustThicknessPopup();

protected:
	void showEvent(QShowEvent *);
	void hideEvent(QHideEvent *);

public:
	class Swatch;

	struct FrameData //!  Xsheet frame data used as processing input.
	{
		TXshSimpleLevelP m_sl; //!< Referenced level.
		int m_frameIdx;		   //!< Index of the referenced level frame index.

	public:
		FrameData();
		FrameData(const TXshSimpleLevelP &sl, int frameIdx);

		static FrameData getCurrent();

		bool operator==(const FrameData &other) const;
		bool operator!=(const FrameData &other) const
		{
			return !operator==(other);
		}

		TVectorImageP image() const;
	};

	struct SelectionData //!  Selection-related data used as processing input.
	{
		enum ContentType //!  Type of content in the selection.
		{
			NONE,		//!< Empty / invalid selection.
			IMAGE,		//!< Selection of entire images, each frame.
			STYLES,		//!< Selection of strokes with specific styles, each frame.
			BOUNDARIES, //!< Selection of boundary strokes.
			STROKES,	//!< Selection of a specific set of strokes, on a
			//!  <I>single image</I>.
		};

		enum FramesType //!  Selection type for frames in the level.
		{
			ALL_FRAMES,		 //!< All frames in the level.
			SELECTED_FRAMES, //!< Frames selected in SelectionData::m_frameIdxs.
		};

	public:
		/*! \remark  Value STROKES restricts m_framesType to SELECTED_FRAMES, and
                 m_frameIdxs to a sigle element.                                    */
		ContentType m_contentType; //!< Content type of the selection.
		FramesType m_framesType;   //!< Frames type of the selection.

		// Level Range / Image  data

		TXshSimpleLevelP m_sl;	 //!< Source level to be processed.
		std::set<int> m_frameIdxs; //!< Level frame indexes to be processed.

		// Additional selected data

		/*! \details    Type values for which m_idxs has a meaning are:
                      \li  STROKES yields selected stroke indexes
                      \li  STYLES  yields selected style indexes                    */
		std::vector<int> m_idxs; //!< Selection of \a sorted indexes whose meaning depends
								 //!  on m_type.
	public:
		SelectionData();
		SelectionData(const TSelection *s);
		SelectionData(const FrameData &fd);

		void getRange(int &startIdx, int &endIdx) const;

		operator bool() const;
	};

private:
	// Widgets

	QComboBox *m_thicknessMode;				 //!< Thickness mode (scale thickness, add thickness, constant).
	DVGui::MeasuredDoubleField *m_fromScale, //!< Starting thickness scale.
		*m_fromDisplacement,				 //!< Starting thickness displacement.
		*m_toScale,							 //!< Ending thickness scale.
		*m_toDisplacement;					 //!< Ending thickness displacement.

	Swatch *m_viewer; //!< Swatch viewer widget.

	QPushButton *m_okBtn; //!< Ok button.

	// Cached processing data

	SelectionData m_selectionData; //!< Current selection-related data.
	FrameData m_currentFrameData;  //!< Current frame-related data.

	FrameData m_previewedFrameData; //!< Currently previewed frame data.
	bool m_validPreview;			//!< Preview validity flag.

private:
	void getTransformParameters(double(&fromTransform)[2],
								double(&toTransform)[2]); //!< Retrieves transform parameters at the end of
														  //!  the selected frames range.
	void updateSelectionData();							  //!< Rebuilds m_selectionData.
	void updateCurrentFrameData();						  //!< Rebuilds m_currentFrameData.
	void updateSelectionGui();							  //!< Updates the popup's GUI according to current
														  //!  level selection.
	void schedulePreviewUpdate();						  //!< Delayed, coalesced updatePreview() invoker.

private slots:

	void onXsheetChanged();	//!< Reactions to xsheet changes.
	void onSelectionChanged(); //!< Reactions to current selection changes.
	void onFrameChanged();	 //!< Reactions to current frame changes.
	void onModeChanged();	  //!< Reactions to m_thicknessMode changes.
	void onParamsChanged();	//!< Reactions to processing parameters changes.

	void updatePreview(); //!< Updates shown preview image.
	void apply();		  //!< Starts processing.
};

#endif // ADJUST_THICKNESS_POPUP_H