#pragma once

#ifndef SWATCHVIEWER_H
#define SWATCHVIEWER_H

#ifdef _MSC_VER
#pragma warning(disable : 4251)
#endif

#include "tcommon.h"
#include <QWidget>
#include "tfx.h"
#include "tparamset.h"
#include "trenderer.h"
#include "tthreadmessage.h"
#include "tthread.h"
#include "trop.h"

#include <QTouchDevice>

using namespace TThread;

#undef DVAPI
#undef DVVAR
#ifdef TOONZQT_EXPORTS
#define DVAPI DV_EXPORT_API
#define DVVAR DV_EXPORT_VAR
#else
#define DVAPI DV_IMPORT_API
#define DVVAR DV_IMPORT_VAR
#endif

//-----------------------------------------------------------------------------

//  Forward declarations

class QTouchEvent;
class QGestureEvent;

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

class DVAPI BgPainter {
  std::string m_name;

public:
  BgPainter(std::string name) : m_name(name) {}
  virtual ~BgPainter() {}
  std::string getName() const { return m_name; }
  virtual void paint(const TRaster32P &ras) = 0;
};

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

class DVAPI SolidColorBgPainter final : public BgPainter {
  TPixel32 m_color;

public:
  SolidColorBgPainter(std::string name, TPixel32 color)
      : BgPainter(name), m_color(color) {}

  void paint(const TRaster32P &ras) override { ras->fill(m_color); }
};

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

class DVAPI CheckboardBgPainter final : public BgPainter {
  TPixel32 m_c0, m_c1;

public:
  CheckboardBgPainter(std::string name, TPixel32 c0, TPixel32 c1)
      : BgPainter(name), m_c0(c0), m_c1(c1) {}

  void paint(const TRaster32P &ras) override {
    int n = 4, min = 4;
    TDimensionD d(std::max(min, ras->getLx() / n),
                  std::max(min, ras->getLy() / n));
    d.lx = d.ly = std::max(d.lx, d.ly);
    TRop::checkBoard(ras, m_c0, m_c1, d, TPointD());
  }
};

//=============================================================================
/*! \brief SwatchViewer.

                Inherits \b QWidget.
*/
class DVAPI SwatchViewer final : public QWidget {
  Q_OBJECT

  //! La classe \b Point gestisce un punto che e' collegato a parametri \b
  //! TPointParam.
  /*!Questo tipo di punti consentono di modificare alcuni parametri dell'effetto
  corrente e
  sono editabili dall'utente direttamente nello SwatchViewer*/
  class Point {
  public:
    int m_index;
    TPointParamP m_param;
    bool m_pairFlag;
    Point(int index, const TPointParamP &param)
        : m_index(index), m_param(param), m_pairFlag(false) {}
  };

  TFxP m_fx;
  TFxP m_actualFxClone;

  TRaster32P m_raster;
  TRaster32P m_content;
  TAffine m_aff;
  TAffine m_fxAff;
  TAffine m_contentAff;

  bool m_cameraMode;
  TRect m_cameraRect;

  Qt::MouseButton m_mouseButton;

  std::vector<Point> m_points;
  std::vector<std::pair<int, int>> m_pointPairs;

  int m_selectedPoint;
  TPointD m_pointPosDelta;

  bool m_enabled;
  bool m_firstEnabled;
  int m_frame;
  TThread::Executor m_executor;
  TThread::Mutex m_mutex;

  TRenderer m_renderer;

  BgPainter *m_bgPainter;

  TRaster32P m_crossIcon;

  TPoint m_pos;
  TPoint m_firstPos;
  TRaster32P m_oldContent, m_curContent;

  bool m_computing;

  bool m_touchActive                     = false;
  bool m_gestureActive                   = false;
  QTouchDevice::DeviceType m_touchDevice = QTouchDevice::TouchScreen;
  bool m_zooming                         = false;
  bool m_panning                         = false;
  double m_scaleFactor;  // used for zoom gesture

  bool m_stylusUsed = false;

  friend class ContentRender;

public:
  class ContentRender final : public TThread::Runnable {
  public:
    TRasterFxP m_fx;
    TRasterP m_raster;
    int m_frame;
    TDimension m_size;
    TAffine m_aff;
    SwatchViewer *m_viewer;
    bool m_started;

    TRenderSettings m_info;

    ContentRender(TRasterFx *fx, int frame, const TDimension &size,
                  SwatchViewer *viewer);
    ~ContentRender();

    void run() override;
    int taskLoad() override;

    void onStarted(TThread::RunnableP task) override;
    void onFinished(TThread::RunnableP task) override;
    void onCanceled(TThread::RunnableP task) override;
  };

  SwatchViewer(QWidget *parent = 0, Qt::WindowFlags flags = Qt::WindowFlags());
  ~SwatchViewer();

  static void suspendRendering(bool suspend, bool blocking = true);

  void setCameraMode(bool enabled) { m_cameraMode = enabled; }
  bool getCameraMode() const { return m_cameraMode; }

  void setCameraSize(const TDimension &cameraSize);
  TDimension getCameraSize() const { return m_cameraRect.getSize(); }

  void setFx(const TFxP &fx, const TFxP &actualFx, int frame);

  void updateFrame(int frame);

  bool isEnabled() { return m_enabled; }

public slots:
  void setEnable(bool enabled);
  void updateSize(const QSize &size);
  void setBgPainter(TPixel32 color1, TPixel32 color2 = TPixel32());
  void resetView();
  void fitView();

protected:
  void computeContent();
  TPoint world2win(const TPointD &p) const;
  TPointD win2world(const TPoint &p) const;
  void zoom(const TPoint &pos, double factor);
  void zoom(bool forward, bool reset);
  void pan(const TPoint &delta);

  void updateRaster();

  const TRaster32P &getContent() const { return m_content; }
  void setContent(const TRaster32P &content, const TAffine &contentAff);

  void setAff(const TAffine &aff);

  void contextMenuEvent(QContextMenuEvent *event) override;
  void paintEvent(QPaintEvent *event) override;
  void mousePressEvent(QMouseEvent *event) override;
  void mouseMoveEvent(QMouseEvent *event) override;
  void mouseReleaseEvent(QMouseEvent *event) override;
  void wheelEvent(QWheelEvent *) override;
  void keyPressEvent(QKeyEvent *event) override;
  void resizeEvent(QResizeEvent *event) override;
  void hideEvent(QHideEvent *event) override;

  void mouseDoubleClickEvent(QMouseEvent *event) override;
  void tabletEvent(QTabletEvent *e) override;
  void touchEvent(QTouchEvent *e, int type);
  void gestureEvent(QGestureEvent *e);
  bool event(QEvent *e) override;

private:
  QPointF m_firstPanPoint;

signals:
  void pointPositionChanged(int index, const TPointD &p);
};

#endif  // SWATCHVIEWER_H