use bevy::prelude::*;
use bevy_debug_overlay::{OverlayCamera, OverlayConfig, OverlayPlugin};

fn main() {
    App::new()
        .insert_resource(Msaa::Off)
        .add_plugins(DefaultPlugins)
        // If you need to configure it
        .insert_resource(OverlayConfig::default())
        // Insert the plugin on the app
        .add_plugin(OverlayPlugin)
        .add_startup_system(setup_3d_scene)
        .add_system(update)
        .run();
}

// This is simply the scene from the 3d_scene example of bevy
fn setup_3d_scene(
    mut commands: Commands,
    mut meshes: ResMut<Assets<Mesh>>,
    mut materials: ResMut<Assets<StandardMaterial>>,
) {
    // camera
    commands.spawn((
        Camera3dBundle {
            transform: Transform::from_xyz(-2.0, 2.5, 5.0).looking_at(Vec3::ZERO, Vec3::Y),
            ..default()
        },
        // You need to add the component to your camera
        OverlayCamera::default(),
    ));

    // ground
    commands.spawn(PbrBundle {
        mesh: meshes.add(Mesh::from(shape::Plane {
            size: 5.0,
            subdivisions: 1,
        })),
        material: materials.add(Color::rgb(0.3, 0.5, 0.3).into()),
        ..default()
    });

    // cube
    commands.spawn(PbrBundle {
        mesh: meshes.add(Mesh::from(shape::Cube { size: 1.0 })),
        material: materials.add(Color::rgb(0.8, 0.7, 0.6).into()),
        transform: Transform::from_xyz(0.0, 0.5, 0.0),
        ..default()
    });

    // light
    commands.spawn(PointLightBundle {
        point_light: PointLight {
            intensity: 1500.0,
            shadows_enabled: true,
            ..default()
        },
        transform: Transform::from_xyz(4.0, 8.0, 4.0),
        ..default()
    });
}

fn update(
    key: Res<Input<KeyCode>>,
    mut q: Query<&mut OverlayCamera>,
    mut config: ResMut<OverlayConfig>,
) {
    if key.just_pressed(KeyCode::F11) {
        for mut overlay in &mut q {
            overlay.enabled = !overlay.enabled;
        }
    }

    if key.just_pressed(KeyCode::Z) {
        config.proportional_width = !config.proportional_width;
    }
    if key.just_pressed(KeyCode::X) {
        config.advanced_mode = !config.advanced_mode;
    }
}