use bevy::{color::palettes::css::*, prelude::*};

fn main() {
    App::new()
        .add_plugins(DefaultPlugins)
        .insert_resource(ClearColor(WHITE.into()))
        .add_systems(Startup, setup_3d)
        .add_systems(Update, move_camera)
        .run();
}

fn setup_3d(
    mut commands: Commands,
    mut meshes: ResMut<Assets<Mesh>>,
    mut materials: ResMut<Assets<StandardMaterial>>,
) {
    commands.spawn((
        Camera::default(),
        Camera3d::default(),
        Transform::default().looking_at(Vec3::new(0.0, -1.0, 0.0), Vec3::Y),
        AmbientLight {
            brightness: 160.0,
            ..default()
        },
    ));

    commands.spawn((
        Mesh3d(meshes.add(Cuboid::default())),
        MeshMaterial3d(materials.add(StandardMaterial {
            base_color: RED.into(),
            ..Default::default()
        })),
        Transform::from_xyz(0.0, -10.0, 0.0),
    ));

    commands.spawn((
        Mesh3d(meshes.add(Cuboid::default())),
        MeshMaterial3d(materials.add(StandardMaterial {
            base_color: GREEN.into(),
            ..Default::default()
        })),
        Transform::from_xyz(0.0, -50.0, 0.0),
    ));

    commands.spawn((
        Mesh3d(meshes.add(Cuboid::default())),
        MeshMaterial3d(materials.add(StandardMaterial {
            base_color: BLUE.into(),
            ..Default::default()
        })),
        Transform::from_xyz(0.0, -100.0, 0.0),
    ));
}

fn move_camera(keys: Res<ButtonInput<KeyCode>>, mut camera: Single<&mut Transform, With<Camera>>) {
    const SPEED: f32 = 0.1;
    if keys.pressed(KeyCode::ArrowLeft) {
        camera.translation.z += SPEED;
    } else if keys.pressed(KeyCode::ArrowRight) {
        camera.translation.z -= SPEED;
    }

    if keys.pressed(KeyCode::ArrowUp) {
        camera.translation.x -= SPEED;
    } else if keys.pressed(KeyCode::ArrowDown) {
        camera.translation.x += SPEED;
    }
}