//! This example shows how to setup a basic counter app using feathers
//!
//! To use feathers in your bevy app, you need to use the `bevy_feathers` feature

use bevy::{
    feathers::{
        controls::FeathersButton,
        dark_theme::create_dark_theme,
        display::caption,
        theme::{ThemeBackgroundColor, UiTheme},
        tokens, FeathersPlugins,
    },
    prelude::*,
    ui_widgets::Activate,
};

#[derive(Resource)]
struct Counter(i32);

#[derive(Component, Default, Clone)]
struct CounterText;

fn main() {
    App::new()
        .add_plugins((
            DefaultPlugins,
            // Don't forget to add the plugin.
            // Make sure you are using FeathersPlugins with an `s`
            FeathersPlugins,
        ))
        // Configure feathers to use the dark theme
        .insert_resource(UiTheme(create_dark_theme()))
        .insert_resource(Counter(0))
        .add_systems(Startup, scene.spawn())
        .add_systems(
            Update,
            update_counter_text.run_if(resource_changed::<Counter>),
        )
        .run();
}

fn scene() -> impl SceneList {
    bsn_list! {
        Camera2d
        --
        @demo_root()
    }
}

fn demo_root() -> impl Scene {
    bsn! {
        Node {
            width: percent(100),
            height: percent(100),
            align_items: AlignItems::Center,
            justify_content: JustifyContent::Center,
        }
        ThemeBackgroundColor(tokens::WINDOW_BG)
        Children[
            Node {
                align_items: AlignItems::Center,
                justify_content: JustifyContent::Center,
            }
            Children [
                @FeathersButton
                on(|_activate: On<Activate>, mut counter: ResMut<Counter>| {
                    counter.0 -= 1;
                })
                Children [ @caption("-1") ]
                --
                Node {
                    margin: UiRect::horizontal(px(10.0)),
                }
                @caption("0") CounterText
                --
                @FeathersButton
                on(|_activate: On<Activate>, mut counter: ResMut<Counter>| {
                    counter.0 += 1;
                })
                Children [ @caption("+1") ]
            ]
        ]
    }
}

fn update_counter_text(
    counter: Res<Counter>,
    mut counter_text: Single<&mut Text, With<CounterText>>,
) {
    info!("Counter updated");
    counter_text.0 = format!("{}", counter.0);
}