use proj::{
  app::app::App, assets, backend::opengl, geometry::{AttributeType, Mesh, MeshBuilder, VertexFormat, VertexSemantic}, math::{Mat4, Vec2, Vec4}, models::{self, Model}, shaders::{FRAGMENT_SHADER_2D, FRAGMENT_SHADER_SOURCE, VERTEX_SHADER_2D, VERTEX_SHADER_SOURCE, inputs::ShaderInputs}
};
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";

const BUGATTI_OBJ_PATH: &str = "assets/models/bugatti/bugatti.obj";
const BUGATTI_MTL_PATH: &str = "assets/models/bugatti/bugatti.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_2D.to_string(),
    fragment_src: FRAGMENT_SHADER_2D.to_string(),
  };


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

  let mesh = Mesh::builder("triangle", VertexFormat::ui_2d())
    .begin_vertex()
      .position2(Vec2::new(0.0, 0.5))
      .color(Vec4::new(1.0, 0.0, 0.0, 1.0))
    .end_vertex()
    .begin_vertex()
      .position2(Vec2::new(-0.5, -0.5))
      .color(Vec4::new(1.0, 1.0, 0.0, 1.0))
    .end_vertex()
    .begin_vertex()
      .position2(Vec2::new(0.5, -0.5))
      .color(Vec4::new(0.0, 0.0, 1.0, 1.0))
    .end_vertex()
    .build();

  app.meshes.push(mesh);
  app.add_shader(shader_src);

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

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