//
// Created by rov on 12/26/25.
//

#include "render.h"
#include "window.h"

void Render_Frame(const App_t *app) {
    SDL_Renderer *renderer = Window_GetRenderer();
    SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
    SDL_RenderClear(renderer);

    Render_MainWindowBackground(app);

    SDL_RenderPresent(renderer);
}

void Render_MainWindowBackground(const App_t *app) {
    SDL_Renderer *renderer = Window_GetRenderer();

    if (app->bitmap.marbleTexture == NULL) {
        SDL_SetRenderDrawColor(renderer, 64, 64, 64, 255);
        SDL_RenderClear(renderer);
        return;
    }

    const int TILE_SIZE = 128;

    // Calculate how many tiles we need to cover the screen
    const int tilesX = app->metrics.screenWidth / TILE_SIZE + 1;
    const int tilesY = app->metrics.screenHeight / TILE_SIZE + 1;

    for (int y = 0; y < tilesY; y++) {
        for (int x = 0; x < tilesX; x++) {
            SDL_FRect destRect = {
                (float) (x * TILE_SIZE),
                (float) (y * TILE_SIZE),
                (float) TILE_SIZE,
                (float) TILE_SIZE
            };

            SDL_RenderTexture(renderer, app->bitmap.marbleTexture, NULL, &destRect);
        }
    }
}