//! The Kiss3D App is created.
use crate::pclrenderer::PointCloudRenderer;
use kiss3d::camera::Camera;
use kiss3d::planar_camera::PlanarCamera;
use kiss3d::post_processing::PostProcessingEffect;
use kiss3d::renderer::Renderer;
use kiss3d::text::Font;
use kiss3d::window::{State, Window};
use na::{Point2, Point3};
use nalgebra as na;

/// Global State for the app
pub struct AppState {
    /// The Renderer for the App to use
    pub point_cloud_renderer: PointCloudRenderer,
}

impl State for AppState {
    // Return the custom renderer that will be called
    // at each render loop.
    #[allow(clippy::type_complexity)]
    fn cameras_and_effect_and_renderer(
        &mut self,
    ) -> (
        Option<&mut dyn Camera>,
        Option<&mut dyn PlanarCamera>,
        Option<&mut dyn Renderer>,
        Option<&mut dyn PostProcessingEffect>,
    ) {
        (None, None, Some(&mut self.point_cloud_renderer), None)
    }

    fn step(&mut self, window: &mut Window) {
        let num_points_text = format!(
            "Number of points: {}",
            self.point_cloud_renderer.num_points()
        );
        window.draw_text(
            &num_points_text,
            &Point2::new(0.0, 20.0),
            50.0,
            &Font::default(),
            &Point3::new(1.0, 1.0, 1.0),
        );
    }
}