#include<iostream>
#include<SDL.h>

using namespace std;

int main(int argc, char *argv[])
{
    SDL_Window *window = nullptr;
    SDL_Surface *image1 = nullptr;
    SDL_Surface *image2 = nullptr;
    SDL_Surface *image3 = nullptr;
    SDL_Surface *currentImage = nullptr;
    SDL_Surface *windowSurface = nullptr;

    SDL_Init(SDL_INIT_VIDEO);

    window = SDL_CreateWindow("SDL Rajan's Game", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 640, 480, SDL_WINDOW_SHOWN);    
    windowSurface = SDL_GetWindowSurface(window);

    //Loaded bitmap file to the window
    image1 = SDL_LoadBMP("bitmap example.bmp");
    image2 = SDL_LoadBMP("bitmap example 2.bmp");
    image3 = SDL_LoadBMP("bitmap example 3.bmp");
    currentImage = image1;

    bool IsRunning = true;
    SDL_Event ev;

    while (IsRunning)
    {
        //pollevent, puts events into a cue, and processes the events
        while (SDL_PollEvent(&ev) != 0)
        {
            //getting the quit and the mouse/keyboard events
            if (ev.type == SDL_QUIT)
                IsRunning = false;
            else if (ev.type == SDL_MOUSEBUTTONDOWN)
            {
                if (ev.button.button == SDL_BUTTON_LEFT)
                    currentImage = image1;
                else if (ev.button.button == SDL_BUTTON_RIGHT)
                    currentImage = image2;
                else if (ev.button.button == SDL_BUTTON_X1)
                    currentImage = image3;
            }
        }

        //Drawing the current image to the window
        SDL_BlitSurface(currentImage, NULL, windowSurface, NULL);
        SDL_UpdateWindowSurface(window);
    }

    //Freeing the memory
    SDL_FreeSurface(image1);
    SDL_FreeSurface(image2);
    SDL_FreeSurface(image3);

    currentImage = image1 = image2 = image3 = nullptr;
    window = nullptr;

    SDL_DestroyWindow(window);
    SDL_Quit();

    return 0;
}