#ifndef _VIEWBASE_H
#define _VIEWBASE_H

#include "Engine.h"

// forward declarations for the OGLFT fonts
namespace OGLFT {
	class Monochrome;
}

namespace Engine {

class Module;
class ModelBase;
class CameraBase;
class OverlayBase;

/** \brief Performs the actual drawing based on Camera and Model
 */

class ViewBase : public Module{ 
	public:
		/** \brief Resizes the View */
		void Resize (int width, int height);

		/** \brief Performs all drawing */
		virtual void Draw ();

		/** \brief Draws a string at the given position using current projection
		 * and modelview matrices */
		void DrawGLString (float x, float y, const char* str);
		/** \brief Stores the eye poisition in eye_out */
		void GetCamereEye (float *eye_out);

		/** \brief Calculates the world coordinates to given screen coordinates */
		void CalcWorldCoordinates (int screen_x, int screen_y, float world_y, float *pos_out);

		unsigned int GetWindowWidth () { return mWindowWidth; };
		unsigned int GetWindowHeight () { return mWindowHeight; };
		int GetFrameRate() { return mFrameRate; };

		void SetDrawAxis (bool draw_axis) { mDrawGrid = draw_axis; };
		bool GetDrawAxis () { return mDrawGrid; };
		void SetDrawGrid (bool draw_grid) { mDrawGrid = draw_grid; };
		bool GetDrawGrid () { return mDrawGrid; };
		void SetGridSize (int x, int z) {	mGridSizeX = x; mGridSizeZ = z;	}

		void AddOverlay (OverlayBase *overlay) { mOverlays.push_back (overlay); };

		/* Input forwarding for the overlays */
		bool SendKeyDown (const SDL_keysym &keysym);
		bool SendKeyUp (const SDL_keysym &keysym);
		bool SendMouseButtonUp (Uint8 button, Uint16 xpos, Uint16 ypos);
		bool SendMouseButtonDown (Uint8 button, Uint16 xpos, Uint16 ypos);

	protected:
		/** \brief Initializes the system */
		int OnInit (int argc, char* argv[]);
		/** \brief Destroys the system (must be called!) */
		void OnDestroy ();

		/** \brief Updates the camera for further drawing */
		virtual void UpdateCamera ();
		/** \brief Draws a grid of 16 x 16 tiles */
		void DrawGrid ();
		/** \brief Draws the level and all the visible Entities */
		virtual void DrawWorld ();
		/** \brief Draws orthographic overlay*/
		void DrawOverlay2D ();

		ModelBase *mModel;
		CameraBase *mCamera;

		std::vector<OverlayBase*> mOverlays;

		/** \brief The height of the canvas we're drawing on */
		unsigned int mWindowHeight;
		/** \brief The width of the canvas we're drawing on */
		unsigned int mWindowWidth;
		/** \brief Stores the current frame rate */
		int mFrameRate;

		bool mDrawAxis;
		bool mDrawGrid;
		int mGridSizeX;
		int mGridSizeZ;

		/** \brief Font that is used in the console */
		OGLFT::Monochrome* mConsoleFont;

		friend class Engine;
};

}

#include "ViewBaseGlobal.h"

#endif // _VIEWBase_H