#include <iostream>
#include <SDL2/SDL.h>

int main(int argc, char* argv[]) {
    if (SDL_Init(SDL_INIT_VIDEO) < 0) {
        SDL_Log("Unable to initialize SDL: %s", SDL_GetError());
        return -1;
    }

    SDL_Window* window = SDL_CreateWindow("Fullscreen Toggle with Aspect Ratio",
                                          SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
                                          640, 480, SDL_WINDOW_RESIZABLE);

    if (!window) {
        SDL_Log("Unable to create window: %s", SDL_GetError());
        SDL_Quit();
        return -1;
    }

    SDL_Renderer* renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
    if (!renderer) {
        SDL_Log("Unable to create renderer: %s", SDL_GetError());
        SDL_DestroyWindow(window);
        SDL_Quit();
        return -1;
    }

    int isFullscreen = 0;
    int running = 1;
    SDL_Event event;

    while (running) {
        while (SDL_PollEvent(&event)) {
            if (event.type == SDL_QUIT) {
                running = 0;
            }
            if (event.type == SDL_KEYDOWN) {
                if (event.key.keysym.sym == SDLK_RETURN && (event.key.keysym.mod & KMOD_ALT)) {
                    // Přepnutí mezi fullscreen a oknem
                    isFullscreen = !isFullscreen;
                    SDL_SetWindowFullscreen(window, isFullscreen ? SDL_WINDOW_FULLSCREEN_DESKTOP : 0);
                }
            }
        }

        // Renderování
        SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
        SDL_RenderClear(renderer);
        SDL_RenderPresent(renderer);
    }

    // Uklid zdrojů
    SDL_DestroyRenderer(renderer);
    SDL_DestroyWindow(window);
    SDL_Quit();
    return 0;
}