#pragma once

#ifndef SPREADSHEETVIEWER_H
#define SPREADSHEETVIEWER_H

#include "tcommon.h"
#include <QFrame>
#include <QScrollArea>

#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 declaration
class TFrameHandle;
class SpreadsheetViewer;

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

namespace Spreadsheet {

// forward declaration
class GenericPanel;

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

class DVAPI FrameScroller {
  QList<FrameScroller *> m_connectedScrollers;

public:
  FrameScroller();
  virtual ~FrameScroller();
  void connectScroller(FrameScroller *scroller);
  void disconnectScroller(FrameScroller *scroller);
  bool isScrollerConnected(FrameScroller *scroller);

  virtual QScrollArea *getFrameScrollArea() const = 0;

  void registerFrameScroller();
  void unregisterFrameScroller();

  void prepareToScroll(int dy);
  virtual void onPrepareToScroll(int dy) {}
};

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

class DVAPI DragTool {
public:
  DragTool() {}
  virtual ~DragTool() {}

  virtual void click(int row, int col, QMouseEvent *e) {}
  virtual void drag(int row, int col, QMouseEvent *e) {}
  virtual void release(int row, int col, QMouseEvent *e) {}
};

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

class DVAPI SetFrameDragTool final : public DragTool {
  TFrameHandle *m_frameHandle;

public:
  SetFrameDragTool(TFrameHandle *frameHandle) : m_frameHandle(frameHandle) {}

  void click(int row, int col, QMouseEvent *e) override;
  void drag(int row, int col, QMouseEvent *e) override;
  void release(int row, int col, QMouseEvent *e) override;
};

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

class DVAPI SelectionDragTool final : public DragTool {
  SpreadsheetViewer *m_viewer;
  int m_firstRow, m_firstCol;

public:
  SelectionDragTool(SpreadsheetViewer *viewer);

  void click(int row, int col, QMouseEvent *e) override;
  void drag(int row, int col, QMouseEvent *e) override;
  void release(int row, int col, QMouseEvent *e) override;
};

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

class DVAPI PanTool final : public DragTool {
  SpreadsheetViewer *m_viewer;
  GenericPanel *m_panel;
  QPoint m_lastPos;

public:
  PanTool(GenericPanel *panel);

  void click(int row, int col, QMouseEvent *e) override;
  void drag(int row, int col, QMouseEvent *e) override;
  void release(int row, int col, QMouseEvent *e) override;
};

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

class DVAPI ScrollArea final : public QScrollArea {
  Q_OBJECT

public:
#if QT_VERSION >= 0x050500
  ScrollArea(QWidget *parent = 0, Qt::WindowFlags flags = 0);
#else
  ScrollArea(QWidget *parent = 0, Qt::WFlags flags = 0);
#endif
  virtual ~ScrollArea();

protected:
  // keyPressEvent and wheelEvent are ignored by the ScrollArea
  // and therefore they are handled by the parent (Viewer)
  void keyPressEvent(QKeyEvent *e) override;
  void wheelEvent(QWheelEvent *e) override;
};

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

class DVAPI GenericPanel : public QWidget {
  Q_OBJECT
  SpreadsheetViewer *m_viewer;
  DragTool *m_dragTool;

public:
  GenericPanel(SpreadsheetViewer *viewer);
  virtual ~GenericPanel();

  SpreadsheetViewer *getViewer() const { return m_viewer; }

  virtual DragTool *createDragTool(QMouseEvent *) { return 0; };

protected:
  void paintEvent(QPaintEvent *) override;
  void mousePressEvent(QMouseEvent *) override;
  void mouseReleaseEvent(QMouseEvent *) override;
  void mouseMoveEvent(QMouseEvent *) override;
};

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

class DVAPI RowPanel : public GenericPanel {
  Q_OBJECT
  const int m_xa;  // frame cells start at m_xa
public:
  RowPanel(SpreadsheetViewer *viewer);
  virtual ~RowPanel() {}

  DragTool *createDragTool(QMouseEvent *) override;

protected:
  void paintEvent(QPaintEvent *) override;
  void drawRows(QPainter &p, int r0, int r1);
  void drawCurrentRowGadget(QPainter &p, int r0, int r1);
};

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

class DVAPI ColumnPanel : public GenericPanel {
  Q_OBJECT
public:
  ColumnPanel(SpreadsheetViewer *viewer);
  virtual ~ColumnPanel() {}
};

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

class DVAPI CellPanel : public GenericPanel {
  Q_OBJECT

public:
  CellPanel(SpreadsheetViewer *viewer);
  virtual ~CellPanel() {}

  DragTool *createDragTool(QMouseEvent *) override;

protected:
  void paintEvent(QPaintEvent *) override;
  virtual void drawCells(QPainter &p, int r0, int c0, int r1, int c1) {}
};
}

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

class DVAPI SpreadsheetViewer : public QFrame,
                                public Spreadsheet::FrameScroller {
  Q_OBJECT

  QColor m_lightLightBgColor;  // RowPanel background (124,124,124)
  QColor m_bgColor;         // RowPanel background in scene range(164,164,164)
  QColor m_lightLineColor;  // horizontal line (146,144,146)

  Q_PROPERTY(QColor LightLightBGColor READ getLightLightBGColor WRITE
                 setLightLightBGColor)
  Q_PROPERTY(QColor BGColor READ getBGColor WRITE setBGColor)
  Q_PROPERTY(
      QColor LightLineColor READ getLightLineColor WRITE setLightLineColor)

  QColor m_currentRowBgColor;  // current frame, column
  QColor m_markerLineColor;    // marker interval (0, 255, 246)
  QColor m_textColor;          // text (black)
  QColor m_verticalLineColor;  // vertical line (black)
  Q_PROPERTY(QColor CurrentRowBgColor READ getCurrentRowBgColor WRITE
                 setCurrentRowBgColor)
  Q_PROPERTY(
      QColor MarkerLineColor READ getMarkerLineColor WRITE setMarkerLineColor)
  Q_PROPERTY(QColor TextColor READ getTextColor WRITE setTextColor)
  Q_PROPERTY(QColor VerticalLineColor READ getVerticalLineColor WRITE
                 setVerticalLineColor)

  // key frame
  QColor m_keyFrameColor;          // (219,139,54)
  QColor m_keyFrameBorderColor;    // (82,51,20)
  QColor m_selectedKeyFrameColor;  // (237,197,155)
  // key frame inbetween
  QColor m_inBetweenColor;          // (194,194,176)
  QColor m_inBetweenBorderColor;    // (72,72,65)
  QColor m_selectedInBetweenColor;  // (225,225,216)
  // empty cell
  QColor m_selectedEmptyColor;  // (190,190,190)
  // empty cell in the scene range
  QColor m_selectedSceneRangeEmptyColor;  // (210,210,210)
  Q_PROPERTY(QColor KeyFrameColor READ getKeyFrameColor WRITE setKeyFrameColor)
  Q_PROPERTY(QColor KeyFrameBorderColor READ getKeyFrameBorderColor WRITE
                 setKeyFrameBorderColor)
  Q_PROPERTY(QColor SelectedKeyFrameColor READ getSelectedKeyFrameColor WRITE
                 setSelectedKeyFrameColor)
  Q_PROPERTY(
      QColor InBetweenColor READ getInBetweenColor WRITE setInBetweenColor)
  Q_PROPERTY(QColor InBetweenBorderColor READ getInBetweenBorderColor WRITE
                 setInBetweenBorderColor)
  Q_PROPERTY(QColor SelectedInBetweenColor READ getSelectedInBetweenColor WRITE
                 setSelectedInBetweenColor)
  Q_PROPERTY(QColor SelectedEmptyColor READ getSelectedEmptyColor WRITE
                 setSelectedEmptyColor)
  Q_PROPERTY(
      QColor SelectedSceneRangeEmptyColor READ getSelectedSceneRangeEmptyColor
          WRITE setSelectedSceneRangeEmptyColor)

  QColor m_columnHeaderBorderColor;  // column header border lines (46,47,46)
  QColor m_selectedColumnTextColor;  // selected column text (red)
  Q_PROPERTY(QColor ColumnHeaderBorderColor READ getColumnHeaderBorderColor
                 WRITE setColumnHeaderBorderColor)
  Q_PROPERTY(QColor SelectedColumnTextColor READ getSelectedColumnTextColor
                 WRITE setSelectedColumnTextColor)

  Spreadsheet::ScrollArea *m_columnScrollArea;
  Spreadsheet::ScrollArea *m_rowScrollArea;
  Spreadsheet::ScrollArea *m_cellScrollArea;
  TFrameHandle *m_frameHandle;

  int m_columnWidth;
  int m_rowHeight;

  // QPoint m_delta;
  int m_timerId;
  QPoint m_autoPanSpeed;
  QPoint m_lastAutoPanPos;
  int m_rowCount, m_columnCount;
  int m_currentRow;
  int m_markRowDistance, m_markRowOffset;
  // QRect m_selectedCells; // x=col, y=row
  bool m_isComputingSize;

public:
  SpreadsheetViewer(QWidget *parent);
  virtual ~SpreadsheetViewer();

  int getColumnWidth() const { return m_columnWidth; }
  void setColumnWidth(int width) { m_columnWidth = width; }

  int getRowHeight() const { return m_rowHeight; }
  void setRowHeight(int height) { m_rowHeight = height; }

  void setRowsPanel(Spreadsheet::RowPanel *rows);
  void setColumnsPanel(Spreadsheet::ColumnPanel *columns);
  void setCellsPanel(Spreadsheet::CellPanel *cells);

  int getRowCount() const { return m_rowCount; }

  // provvisorio
  QScrollArea *getFrameScrollArea() const override { return m_cellScrollArea; }

  // QProperty
  void setLightLightBGColor(const QColor &color) {
    m_lightLightBgColor = color;
  }
  QColor getLightLightBGColor() const { return m_lightLightBgColor; }
  void setBGColor(const QColor &color) { m_bgColor = color; }
  QColor getBGColor() const { return m_bgColor; }
  void setLightLineColor(const QColor &color) { m_lightLineColor = color; }
  QColor getLightLineColor() const { return m_lightLineColor; }
  void setCurrentRowBgColor(const QColor &color) {
    m_currentRowBgColor = color;
  }
  QColor getCurrentRowBgColor() const { return m_currentRowBgColor; }
  void setMarkerLineColor(const QColor &color) { m_markerLineColor = color; }
  QColor getMarkerLineColor() const { return m_markerLineColor; }
  void setTextColor(const QColor &color) { m_textColor = color; }
  QColor getTextColor() const { return m_textColor; }
  void setVerticalLineColor(const QColor &color) {
    m_verticalLineColor = color;
  }
  QColor getVerticalLineColor() const { return m_verticalLineColor; }
  void setKeyFrameColor(const QColor &color) { m_keyFrameColor = color; }
  QColor getKeyFrameColor() const { return m_keyFrameColor; }
  void setKeyFrameBorderColor(const QColor &color) {
    m_keyFrameBorderColor = color;
  }
  QColor getKeyFrameBorderColor() const { return m_keyFrameBorderColor; }
  void setSelectedKeyFrameColor(const QColor &color) {
    m_selectedKeyFrameColor = color;
  }
  QColor getSelectedKeyFrameColor() const { return m_selectedKeyFrameColor; }
  void setInBetweenColor(const QColor &color) { m_inBetweenColor = color; }
  QColor getInBetweenColor() const { return m_inBetweenColor; }
  void setInBetweenBorderColor(const QColor &color) {
    m_inBetweenBorderColor = color;
  }
  QColor getInBetweenBorderColor() const { return m_inBetweenBorderColor; }
  void setSelectedInBetweenColor(const QColor &color) {
    m_selectedInBetweenColor = color;
  }
  QColor getSelectedInBetweenColor() const { return m_selectedInBetweenColor; }
  void setSelectedEmptyColor(const QColor &color) {
    m_selectedEmptyColor = color;
  }
  QColor getSelectedEmptyColor() const { return m_selectedEmptyColor; }
  void setSelectedSceneRangeEmptyColor(const QColor &color) {
    m_selectedSceneRangeEmptyColor = color;
  }
  QColor getSelectedSceneRangeEmptyColor() const {
    return m_selectedSceneRangeEmptyColor;
  }
  void setColumnHeaderBorderColor(const QColor &color) {
    m_columnHeaderBorderColor = color;
  }
  QColor getColumnHeaderBorderColor() const {
    return m_columnHeaderBorderColor;
  }
  void setSelectedColumnTextColor(const QColor &color) {
    m_selectedColumnTextColor = color;
  }
  QColor getSelectedColumnTextColor() const {
    return m_selectedColumnTextColor;
  }

  void scroll(QPoint delta);
  void onPrepareToScroll(int dy) override { refreshContentSize(0, dy); }

  void setAutoPanSpeed(const QPoint &speed);
  void setAutoPanSpeed(const QRect &widgetBounds, const QPoint &mousePos);
  void stopAutoPan() { setAutoPanSpeed(QPoint()); }
  bool isAutoPanning() const {
    return m_autoPanSpeed.x() != 0 || m_autoPanSpeed.y() != 0;
  }

  int xToColumn(int x) const;
  int yToRow(int y) const;
  int columnToX(int col) const;
  int rowToY(int row) const;

  bool refreshContentSize(int scrollDx, int scrollDy);

  int getCurrentRow() const { return m_currentRow; }
  void setCurrentRow(int row) { m_currentRow = row; }

  virtual QRect getSelectedCells() const               = 0;
  virtual void selectCells(const QRect &selectedCells) = 0;

  bool isSelectedCell(int row, int col) const {
    return getSelectedCells().contains(QPoint(col, row));
  }
  void setMarkRow(int distance, int offset) {
    m_markRowDistance = distance > 0 ? distance : 6;
    m_markRowOffset   = offset;
  }
  void getMarkRow(int &distance, int &offset) const {
    distance = m_markRowDistance;
    offset   = m_markRowOffset;
  }
  int isMarkRow(int row) const {
    return (row - m_markRowOffset) % m_markRowDistance == 0;
  }

  void setFrameHandle(TFrameHandle *frameHandle);
  TFrameHandle *getFrameHandle() const { return m_frameHandle; }

  void ensureVisibleCol(int col);

protected:
  void showEvent(QShowEvent *) override;
  void hideEvent(QHideEvent *) override;
  void resizeEvent(QResizeEvent *event) override;
  void keyPressEvent(QKeyEvent *event) override;
  void wheelEvent(QWheelEvent *event) override;
  void timerEvent(QTimerEvent *) override;

public slots:
  void setRowCount(int rowCount);
  void setColumnCount(int columnCount);

  void frameSwitched();

  void updateAreas();
  void onVSliderChanged(int);
  void onHSliderChanged(int);
  /*
void updateAllAree();
void updateCellColumnAree();
void updateCellRowAree();
*/
};

#endif