/*
 * Mapper.h
 *
 * (c) 2013 Sofian Audry -- info(@)sofianaudry(.)com
 * (c) 2013 Alexandre Quessy -- alexandre(@)quessy(.)net
 *
 * 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/>.
 */


#ifndef MAPPER_H_
#define MAPPER_H_

#include <QtGlobal>

#if __APPLE__
#include <OpenGL/gl.h>
#else
#include <GL/gl.h>
#endif

#include <tr1/memory>

#include <stdlib.h>
#include <stdio.h>

#include "Shape.h"
#include "Paint.h"
#include "Mapping.h"

#include "Util.h"

#include "qtpropertymanager.h"
#include "qtvariantproperty.h"
#include "qttreepropertybrowser.h"
#include "qtbuttonpropertybrowser.h"
#include "qtgroupboxpropertybrowser.h"

#include "variantmanager.h"
#include "variantfactory.h"

/**
 * A way to draw on some kind of shape.
 * 
 * This is an abstract class for specific ways to draw
 * a mapping ie. a shape applied to a paint.
 * 
 * Each mapping (ie. shape x paint combination) that is possible in
 * this software are implemented using a child of this
 * class.
 */
class Mapper : public QObject
{
  Q_OBJECT

public:
  typedef std::tr1::shared_ptr<Mapper> ptr;

protected:
  /// Constructor. A mapper applies to a mapping.
  Mapper(Mapping::ptr mapping);
  virtual ~Mapper();

public:
  /// Returns a pointer to the properties editor for that mapper.
  virtual QWidget* getPropertiesEditor();

  /// Draws the output.
  virtual void draw(QPainter* painter) = 0;

  /// Draws the output controls.
  virtual void drawControls(QPainter* painter) = 0;

  /// Draws the input (source) (if applicable).
  virtual void drawInput(QPainter* painter)  { Q_UNUSED(painter); }

  /// Draws the input (source) controls (if applicable).
  virtual void drawInputControls(QPainter* painter) { Q_UNUSED(painter); }

public slots:
  virtual void setValue(QtProperty* property, const QVariant& value);
  virtual void updateShape(Shape* shape) { Q_UNUSED(shape); }
  virtual void updatePaint() {}

signals:
  void valueChanged();

protected:
  Mapping::ptr _mapping;
  QtAbstractPropertyBrowser* _propertyBrowser;
  QtVariantEditorFactory* _variantFactory;
  QtVariantPropertyManager* _variantManager;
  QtProperty* _topItem;
  QtProperty* _outputItem;

  std::map<QtProperty*, std::pair<Shape*, int> > _propertyToVertex;

  // FIXME: use typedefs, member of the class for type names that are too long to type:
  std::tr1::shared_ptr<Shape> outputShape;

  virtual void _buildShapeProperty(QtProperty* shapeItem, Shape* shape);
  virtual void _updateShapeProperty(QtProperty* shapeItem, Shape* shape);
};

/**
 * Draws a color (abstract class).
 */
class ColorMapper : public Mapper
{
  Q_OBJECT

public slots:
  virtual void updatePaint();

protected:
  ColorMapper(Mapping::ptr mapping);
  virtual ~ColorMapper() {}

protected:
  std::tr1::shared_ptr<Color> color;
};

class PolygonColorMapper : public ColorMapper
{
  Q_OBJECT

public:
  PolygonColorMapper(Mapping::ptr mapping) : ColorMapper(mapping) {}
  virtual ~PolygonColorMapper() {}

  virtual void draw(QPainter* painter);
  virtual void drawControls(QPainter* painter);
};

class MeshColorMapper : public ColorMapper
{
  Q_OBJECT

public:
  MeshColorMapper(Mapping::ptr mapping);
  virtual ~MeshColorMapper() {}

  virtual void draw(QPainter* painter);
  virtual void drawControls(QPainter* painter);

public slots:
  virtual void setValue(QtProperty* property, const QVariant& value);

private:
  QtVariantProperty* _meshItem;
};

class EllipseColorMapper : public ColorMapper
{
  Q_OBJECT

public:
  EllipseColorMapper(Mapping::ptr mapping);
  virtual ~EllipseColorMapper() {}

  virtual void draw(QPainter* painter);
  virtual void drawControls(QPainter* painter);
};

/**
 * Draws a texture (abstract class).
 */
class TextureMapper : public Mapper
{
  Q_OBJECT

public:
  TextureMapper(std::tr1::shared_ptr<TextureMapping> mapping);
  virtual ~TextureMapper() {}

  /**
   * This method will call the _doDraw(QPainter*) method to actually perform the drawing.
   * of the mapping.
   */
  virtual void draw(QPainter* painter);
  virtual void drawInput(QPainter* painter);

  virtual void drawControls(QPainter* painter) = 0;
  virtual void drawInputControls(QPainter* painter) = 0;

public slots:
  virtual void updateShape(Shape* shape);
  virtual void updatePaint();

protected:
  virtual void _doDraw(QPainter* painter) = 0;
  void _preDraw(QPainter* painter);
  void _postDraw(QPainter* painter);

protected:
  QtProperty* _inputItem;
  QtVariantProperty* _meshItem;

  // FIXME: use typedefs, member of the class for type names that are too long to type:
  std::tr1::shared_ptr<TextureMapping> textureMapping;
  std::tr1::shared_ptr<Texture> texture;
  std::tr1::shared_ptr<Shape> inputShape;
};

class PolygonTextureMapper : public TextureMapper
{
  Q_OBJECT

public:
  PolygonTextureMapper(std::tr1::shared_ptr<TextureMapping> mapping) : TextureMapper(mapping) {}
  virtual ~PolygonTextureMapper() {}

  virtual void drawControls(QPainter* painter);
  virtual void drawInputControls(QPainter* painter);
};

class TriangleTextureMapper : public PolygonTextureMapper
{
  Q_OBJECT

public:
  TriangleTextureMapper(std::tr1::shared_ptr<TextureMapping> mapping);
  virtual ~TriangleTextureMapper() {}

protected:
  virtual void _doDraw(QPainter* painter);
};

class MeshTextureMapper : public PolygonTextureMapper
{
  Q_OBJECT

public:
  MeshTextureMapper(std::tr1::shared_ptr<TextureMapping> mapping);
  virtual ~MeshTextureMapper() {}

  virtual void drawControls(QPainter* painter);
  virtual void drawInputControls(QPainter* painter);

public slots:
  virtual void setValue(QtProperty* property, const QVariant& value);

protected:
  virtual void _doDraw(QPainter* painter);

private:
  QtVariantProperty* _meshItem;
};

class EllipseTextureMapper : public PolygonTextureMapper {
  Q_OBJECT

public:
  EllipseTextureMapper(std::tr1::shared_ptr<TextureMapping> mapping);
  virtual ~EllipseTextureMapper() {}

  virtual void drawControls(QPainter* painter);
  virtual void drawInputControls(QPainter* painter);

protected:
  virtual void _doDraw(QPainter* painter);
  static void _setPointOfEllipseAtAngle(QPointF& point, const QPointF& center, float hRadius, float vRadius, float rotation, float circularAngle);
};


#endif /* MAPPER_H_ */