#include <cstdlib>
#include <SDL2/SDL.h>
#include <SDL2/SDL2_gfxPrimitives.h>

void init(); // initialize SDL video

// global window and renderer variable
SDL_Renderer *canvas;
SDL_Window *window;

class Shape {
    private:
        int x,y;
        unsigned color;
    public:
        Shape(int x, int y, unsigned color):x(x),y(y),color(color){}
        unsigned getColor()const{return color;}
        int getx()const{return x;}
        int gety()const{return y;}
};

class Rect : public Shape {
    private:
        int w,h;
    public:
        Rect(int x, int y, unsigned color, int w, int h):Shape(x,y,color),w(w),h(h){}
        void draw() const{rectangleColor(canvas,getx(),gety(),getx()+w,gety()+h,getColor());}
};

class Circle : public Shape {
    private:
        int r;
    public:
        Circle(int x, int y, unsigned color, int r):Shape(x,y,color),r(r){}
        void draw() const{circleColor(canvas,getx(),gety(),r,getColor());}
};

int main ( int argc, char** argv )
{
    init();

    SDL_RenderClear(canvas);
    SDL_RenderPresent(canvas);

    Rect r(100,200,0xff0000ff,20,30);
    Circle c(200,100,0xff00ffff,80);
    r.draw();
    c.draw();
//    r.h=2; // KO
//    r.x=4; // KO
    // finally, update the renderer :)
    SDL_RenderPresent(canvas);
    bool done=false;
    while(!done) {
        // check for messages
        SDL_Event event;
        SDL_WaitEvent(&event);
        switch (event.type) {
        // exit if the window is closed
        case SDL_QUIT:
            done = true;
            break;

        // check for keypresses
        case SDL_KEYDOWN:
            // exit if ESCAPE is pressed
            if (event.key.keysym.sym == SDLK_ESCAPE)
                done = true;
            break;
        } // end switch
    } // end of message processing

    return 0;
}

void init()
{
    // initialize SDL video
    if (SDL_Init(SDL_INIT_VIDEO) < 0) {
        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s", SDL_GetError());
        exit(3);
    }


    // make sure SDL cleans up before exit
    atexit(SDL_Quit);

    // create a new window
    if (SDL_CreateWindowAndRenderer(360, 360, SDL_WINDOW_SHOWN, &window, &canvas)) {
        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create window and renderer: %s", SDL_GetError());
        exit(3);
    }
    SDL_DestroyRenderer(canvas);
    canvas = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);

}