use wsg_lib::app::{App, AppHandler};
use wsg_lib::resources::{Material, Mesh, Vertex};
use wsg_lib::utils;

// 1. On définit notre "Jeu" qui implémente le comportement
struct MonQuad {
    mesh: Mesh,
    material: Material,
}

impl AppHandler for MonQuad {
    fn render(&mut self, app: &mut App) {
        // Le rendu devient simple : on accède aux outils via &mut app
        if let Some(frame) = app.context.get_next_frame() {
            app.renderer
                .render(frame.view(), &self.mesh, &self.material);
            app.renderer.present(frame);
        }
    }
}

#[pollster::main]
async fn main() -> Result<(), wsg_lib::utils::WsgError> {
    // 2. Initialisation via le Builder
    let mut app = App::builder()
        .title("Exemple Simple")
        .size(800, 600)
        .build()
        .await?;

    // 3. Setup des ressources (déclaration)
    app.cache
        .register_shader("basic", utils::BASIC_SHADER_PATH)
        .unwrap();

    let vertices: [Vertex; 4] = [
        Vertex {
            position: [-0.5, 0.5, 0.0],
            normal: [0.0, 0.0, 1.0],
            uv: [0.0, 0.0],
            color: [1.0, 0.0, 0.0, 1.0],
        },
        Vertex {
            position: [0.5, 0.5, 0.0],
            normal: [0.0, 0.0, 1.0],
            uv: [1.0, 0.0],
            color: [0.0, 1.0, 0.0, 1.0],
        },
        Vertex {
            position: [0.5, -0.5, 0.0],
            normal: [0.0, 0.0, 1.0],
            uv: [1.0, 1.0],
            color: [0.0, 0.0, 1.0, 1.0],
        },
        Vertex {
            position: [-0.5, -0.5, 0.0],
            normal: [0.0, 0.0, 1.0],
            uv: [0.0, 1.0],
            color: [1.0, 1.0, 0.0, 1.0],
        },
    ];
    let indices: [u16; 6] = [0, 1, 2, 0, 2, 3];

    let mesh = Mesh::new(app.context.device(), &vertices, Some(&indices));
    let material = Material::new(app.renderer.format(), "basic", &mut app.cache);

    // 4. Lancement de la boucle (la magie opère ici)
    let handler = MonQuad { mesh, material };
    app.run(handler)
}