#include <SDL3/SDL.h>
#include <cstdlib>
#include <ctime>

struct ARGB
{
    Uint8 b, g, r, a;

    // Constructor
    ARGB(Uint8 blue = 0, Uint8 green = 0, Uint8 red = 0, Uint8 alpha = 255)
        : b(blue), g(green), r(red), a(alpha) {}
};

int main(int argc, char *argv[])
{
    constexpr int WIDTH = 320;
    constexpr int HEIGHT = 240;
    constexpr int ZOOM = 2;

    srand(static_cast<unsigned>(time(nullptr)));

    SDL_Init(SDL_INIT_VIDEO | SDL_INIT_EVENTS);

    SDL_Window *window = SDL_CreateWindow("pixels_white_noise", WIDTH * ZOOM, HEIGHT * ZOOM, SDL_WINDOW_OPENGL);
    SDL_Renderer *renderer = SDL_CreateRenderer(window, nullptr);
    SDL_SetRenderLogicalPresentation(renderer, WIDTH, HEIGHT, SDL_LOGICAL_PRESENTATION_INTEGER_SCALE);
    SDL_Texture *texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, WIDTH, HEIGHT);

    ARGB *pixels;
    int pitch;

    SDL_Event sdlEvent;
    bool exit = false;
    while (!exit)
    {
        while (SDL_PollEvent(&sdlEvent))
        {
            if (sdlEvent.type == SDL_EVENT_QUIT)
            {
                exit = true;
                break;
            }
        }

        SDL_LockTexture(texture, nullptr, (void **)&pixels, &pitch);

        for (int i = 0; i < 76800; ++i)
        {
            pixels[i] = ARGB(rand() % 256, rand() % 256, rand() % 256, 255);
        }

        SDL_UnlockTexture(texture);
        SDL_RenderTexture(renderer, texture, nullptr, nullptr);
        SDL_RenderPresent(renderer);
    }

    SDL_DestroyTexture(texture);
    SDL_DestroyRenderer(renderer);
    SDL_DestroyWindow(window);

    SDL_Quit();

    return 0;
}