use crate::prelude::*;

/// Menu Plugin; empty struct for Plugin impl
pub(crate) struct MenuPlugin;

impl Plugin for MenuPlugin {
    fn build(&self, app: &mut App) {
        app.init_state::<MenuState>();
        app.add_systems(Startup, init_menu_ui);
        app.add_systems(
            Update,
            manage_visibility::<MenuState>.run_if(state_changed::<MenuState>),
        );
        app.add_systems(
            Update,
            button_state_action::<MenuState>.run_if(any_component_changed::<Interaction>),
        );
    }
}

/// State tracking if the menu is open or closed
#[derive(States, Debug, Clone, PartialEq, Eq, Hash, Default, Component)]
pub(crate) enum MenuState {
    #[default]
    Open,
    Closed,
}

/// Initialize menu UI nodes at startup
fn init_menu_ui(mut commands: Commands) {
    commands
        .spawn((MenuState::Open, GameChoice::None, Pickable::IGNORE))
        .add(UiContainer)
        .with_children(|parent| {
            parent.spawn_empty().add(UiTitle {
                text: "Game Jam Casino",
                ..default()
            });
            parent
                .spawn(SetState(GameChoice::Dice))
                .add(UiButton { label: "Dice" });
        });
}