use proj::{
  app::app::App, assets, backend::opengl, shaders::{FRAGMENT_SHADER_SOURCE, VERTEX_SHADER_SOURCE}
};
use winit::event_loop::EventLoop;

const HOUSE_OBJ_PATH: &str = "assets/models/small_house/model.obj";
const HOUSE_MAT_PATH: &str = "assets/models/small_house/materials.mtl";

fn main() {
  dotenvy::dotenv().ok();

  let event_loop = EventLoop::new()
    .expect("Should be able to have Event Loop");

  let _shader_src = opengl::GlShaderSource {
    vertex_src: VERTEX_SHADER_SOURCE.to_string(),
    fragment_src: FRAGMENT_SHADER_SOURCE.to_string()
  };

  // Load OBJ and materials (CPU-side, before GL context)
  let obj_data = match assets::obj::load_obj(HOUSE_OBJ_PATH) {
    Ok(o) => o,
    Err(e) => return eprintln!("Error loading OBJ: {}", e),
  };

  let materials = match assets::mtl::load_materials(HOUSE_MAT_PATH) {
    Ok(m) => m,
    Err(e) => return eprintln!("Error loading materials: {}", e),
  };

  println!("Loaded {} meshes, {} materials", obj_data.meshes.len(), materials.len());

  let mut app = App::<opengl::GlBackend>::new();

  let event_res = event_loop.run_app(&mut app);

  println!("{:#?}", event_res);
}