use bevy::color::palettes;
use bevy::math::vec2;
use bevy::prelude::*;
use bevy::sprite::Anchor;
use bevy::text::Text2dBounds;

fn main() {
    App::new()
        .add_plugins(DefaultPlugins)
        .add_systems(Startup, setup)
        .run();
}

fn setup(mut commands: Commands) {
    commands.spawn(Camera2dBundle::default());

    let size = vec2(600., 200.);
    commands.spawn(SpriteBundle {
        sprite: Sprite {
            color: palettes::css::NAVY.into(),
            custom_size: Some(size),
            anchor: Anchor::Center,
            ..Default::default()
        },
        transform: Transform::from_translation(300. * Vec3::Y),
        
        ..Default::default()
    });

    commands.spawn(SpriteBundle {
        sprite: Sprite {
            color: palettes::css::NAVY.into(),
            custom_size: Some(size),
            anchor: Anchor::Center,
            ..Default::default()
        },
        ..Default::default()
    });

    commands.spawn(Text2dBundle {
        text: Text::from_section(
            "hello",
            TextStyle {
                font_size: 60.0,
                ..default()
            },
        )
        .with_justify(JustifyText::Center),
        text_2d_bounds: Text2dBounds {
            size: Vec2::new(600., 200.),
        },
        text_anchor: Anchor::Center,
        ..default()
    });
}

fn fix_text2d_layout(
    mut query: Query<&mut TextLayoutInfo, (Changed<TextLayoutInfo>, With<Anchor>)>,
) {
    for mut layout_info in query.iter_mut() {
        let mut min_x = f32::MAX;
        for glyph in layout_info.glyphs.iter() {
            min_x = (glyph.position.x - 0.5 * glyph.size.x).min(min_x);
        }

        for glyph in layout_info.glyphs.iter_mut() {
            glyph.position.x -= min_x;
        }
    }
}