#ifndef BRUSHINSTANCE_H_
#define BRUSHINSTANCE_H_

#include "renderable.h"
#include "irender.h"
#include "scenelib.h"
#include "selectable.h"

#include "Brush.h"
#include "FaceInstance.h"
#include "EdgeInstance.h"
#include "VertexInstance.h"
#include "BrushClipPlane.h"

class BrushInstanceVisitor
{
	public:
		virtual ~BrushInstanceVisitor ()
		{
		}
		virtual void visit (FaceInstance& face) const = 0;
};

class BrushInstance: public BrushObserver,
		public scene::Instance,
		public Selectable,
		public Renderable,
		public SelectionTestable,
		public ComponentSelectionTestable,
		public ComponentEditable,
		public ComponentSnappable,
		public PlaneSelectable,
		public TransformModifier,	// inherits from Transformable
		public Bounded,
		public Cullable
{
		Brush& m_brush;

		FaceInstances m_faceInstances;

		typedef std::vector<EdgeInstance> EdgeInstances;
		EdgeInstances m_edgeInstances;
		typedef std::vector<VertexInstance> VertexInstances;
		VertexInstances m_vertexInstances;

		ObservedSelectable m_selectable;

		mutable RenderableWireframe m_render_wireframe;
		mutable RenderablePointVector m_render_selected;
		mutable AABB m_aabb_component;
		mutable Array<PointVertex> m_faceCentroidPointsCulled;
		RenderablePointArray m_render_faces_wireframe;
		mutable bool m_viewChanged; // requires re-evaluation of view-dependent cached data

		BrushClipPlane m_clipPlane;

		static Shader* m_state_selpoint;

		BrushInstance (const BrushInstance& other); // NOT COPYABLE
		BrushInstance& operator= (const BrushInstance& other); // NOT ASSIGNABLE
	public:
		STRING_CONSTANT(Name, "BrushInstance");

		BrushInstance (const scene::Path& path, scene::Instance* parent, Brush& brush);
		~BrushInstance ();

		Brush& getBrush ();
		const Brush& getBrush () const;

		// Bounded implementation
		const AABB& localAABB() const;

		// Cullable implementation
		VolumeIntersectionValue intersectVolume (const VolumeTest& test, const Matrix4& localToWorld) const;

		void selectedChanged (const Selectable& selectable);
		typedef MemberCaller1<BrushInstance, const Selectable&, &BrushInstance::selectedChanged> SelectedChangedCaller;

		void selectedChangedComponent (const Selectable& selectable);
		typedef MemberCaller1<BrushInstance, const Selectable&, &BrushInstance::selectedChangedComponent>
				SelectedChangedComponentCaller;

		const BrushInstanceVisitor& forEachFaceInstance (const BrushInstanceVisitor& visitor);

		static void constructStatic ();
		static void destroyStatic ();

		void clear ();
		void reserve (std::size_t size);

		void push_back (Face& face);
		void pop_back ();
		void erase (std::size_t index);
		void connectivityChanged ();

		void edge_clear ();
		void edge_push_back (SelectableEdge& edge);

		void vertex_clear ();
		void vertex_push_back (SelectableVertex& vertex);

		void DEBUG_verify () const;

		bool isSelected () const;
		void setSelected (bool select);
		void invertSelected();

		void update_selected () const;

		void evaluateViewDependent (const VolumeTest& volume, const Matrix4& localToWorld) const;

		void renderComponentsSelected (Renderer& renderer, const VolumeTest& volume, const Matrix4& localToWorld) const;

		void renderComponents (Renderer& renderer, const VolumeTest& volume) const;

		void renderClipPlane (Renderer& renderer, const VolumeTest& volume) const;

		void renderCommon (Renderer& renderer, const VolumeTest& volume) const;

		void renderSolid (Renderer& renderer, const VolumeTest& volume, const Matrix4& localToWorld) const;

		void renderWireframe (Renderer& renderer, const VolumeTest& volume, const Matrix4& localToWorld) const;

		void renderSolid (Renderer& renderer, const VolumeTest& volume) const;

		void renderWireframe (Renderer& renderer, const VolumeTest& volume) const;

		void viewChanged () const;

		void testSelect (Selector& selector, SelectionTest& test);

		bool isSelectedComponents () const;
		void setSelectedComponents (bool select, SelectionSystem::EComponentMode mode);
		void testSelectComponents (Selector& selector, SelectionTest& test, SelectionSystem::EComponentMode mode);

		void selectPlanes (Selector& selector, SelectionTest& test, const PlaneCallback& selectedPlaneCallback);
		void selectReversedPlanes (Selector& selector, const SelectedPlanes& selectedPlanes);

		void transformComponents (const Matrix4& matrix);
		const AABB& getSelectedComponentsBounds () const;

		void snapComponents (float snap);
		void evaluateTransform ();
		void applyTransform ();
		typedef MemberCaller<BrushInstance, &BrushInstance::applyTransform> ApplyTransformCaller;

		void setClipPlane (const Plane3& plane);
};

inline BrushInstance* Instance_getBrush (scene::Instance& instance)
{
	return dynamic_cast<BrushInstance*>(&instance);
}

#endif /*BRUSHINSTANCE_H_*/
