#ifndef CLASS_SCREEN
#define CLASS_SCREEN

#ifdef WITH_OPENGL
#include <SDL_opengl.h>
#endif
#include <SDL.h>
#include <iostream>
#include <sstream>
#include <string>

#include "../Exception.h"
#include "PngFunctions.h"

#define SDL_GRAPHIC 0
#define GL_GRAPHIC 1

extern std::string screens_dir;

namespace graphic
{

/// This is the screen (or window) where everything is blitted, it uses SDL
/// to get an available surface
class Screen
{
	private:
	 /// screen width
	 int _width;
	 /// screen height
	 int _height;

	 /// screen surface
	 SDL_Surface * _surface;

	 /// screen flags
	 Uint32 _flags;

	 /// number of screenshots taken
	 int _num_screens;

	 /// init the graphic contest
	 void InitScreen();

	public:
	 /// empty constructor
	 Screen(Uint16 w, Uint16 h, Uint32 flags = SDL_SWSURFACE);
	 /// destroyer -> video surface is freed by SDL_Quit
	 ~Screen() { };

	 /// set screen flags
	 void SetFlags(Uint32 flags);
	 /// get setted screen flags
	 Uint32 GetFlags() { return _flags; };

	 /// set screen resolution
	 void SetResolution(Uint16 w, Uint16 h);

	 /// go in fullscreen mode
	 void GoFullScreen();
	 /// go in windowed mode
	 void GoWindowed();

	 /// get the Bits Per Pixel format (8 - 16 - 24 - 32)
	 Uint8  GetBitPP() { return _surface->format->BitsPerPixel; };

	 /// update the entire screen
	 void Update();
	 /// update part of the screen
	 void UpdateRect(SDL_Rect & rect);

	 /// fill the surface with a color
	 void Fill(SDL_Color & color);

	 /// clear the screen
	 void Clear();

	 /// return a value that rapresents the current graphic mode
	 int GetGraphicMode()
	 {
		#ifdef WITH_OPENGL
		if(_flags & SDL_OPENGL)
			return GL_GRAPHIC;
		else
		#endif
			return SDL_GRAPHIC;
	 };

	 /// return screen width
	 int GetW() { return _width; };
	 /// return screen height
	 int GetH() { return _height; };

	 #ifdef WITH_OPENGL
	 // chage the graphic contest
	 void ChangeGraphicMode(bool graphic = SDL_GRAPHIC);
	 #endif

	 /// take a screenshot and save the PNG file in data/screens/
	 void TakeScreenshot();
};

/// external pointer to the screen
extern Screen * screen;

}

#endif