use bevy::{
    core_pipeline::{
        fxaa::{Fxaa, Sensitivity},
        prepass::{DepthPrepass, NormalPrepass},
    },
    prelude::*,
};
use bevy_mod_edge_detection::{EdgeDetectionConfig, EdgeDetectionPlugin};

fn main() {
    App::new()
        // MSAA currently doesn't work correctly with the plugin
        .insert_resource(Msaa::Off)
        .add_plugins(DefaultPlugins)
        .add_plugin(EdgeDetectionPlugin)
        .init_resource::<EdgeDetectionConfig>()
        .add_startup_system(setup)
        .run();
}

/// set up a simple 3D scene
fn setup(
    mut commands: Commands,
    mut meshes: ResMut<Assets<Mesh>>,
    mut materials: ResMut<Assets<StandardMaterial>>,
) {
    // set up the camera
    commands.spawn((
        Camera3dBundle {
            transform: Transform::from_xyz(-2.0, 2.5, 5.0).looking_at(Vec3::ZERO, Vec3::Y),
            ..default()
        },
        // The edge detection effect requires the depth and normal prepass
        DepthPrepass,
        NormalPrepass,
        // Add some anti-aliasing because the lines can be really harsh otherwise
        // This isn't required, but some form of AA is recommended
        Fxaa {
            enabled: true,
            edge_threshold: Sensitivity::Extreme,
            edge_threshold_min: Sensitivity::Extreme,
        },
    ));

    // set up basic scene

    // plane
    commands.spawn(PbrBundle {
        mesh: meshes.add(shape::Plane::from_size(5.0).into()),
        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()
    });
}