//! Aspirational RUIN app API for imperative widget refs, typed shortcuts, and overlay layers.
//!
//! Intentionally non-compiling; this is a design sketch.

use ruin::prelude::*;

#[ruin_runtime::async_main]
async fn main() -> ruin::Result<()> {
    App::new()
        .window(Window::new().title("RUIN Search").size(1100.0, 760.0))
        .mount::<CommandSearchApp>()
        .run()
        .await
}

#[component]
fn CommandSearchApp() -> impl View {
    let query = use_signal(String::new);
    let selected_index = use_signal(|| 0usize);

    let search_input = use_widget_ref::<TextInput>();
    let results_list = use_widget_ref::<ScrollArea>();
    let toast_region = use_widget_ref::<ToastRegion>();

    let results = use_memo(move || fuzzy::search(COMMANDS, &query.get()));

    use_mount({
        let search_input = search_input.clone();
        move || search_input.focus()
    });

    use_shortcut(
        Shortcut::new(Key::Character('K')).with_ctrl(),
        ShortcutScope::Application,
        {
            let search_input = search_input.clone();
            move || search_input.focus()
        },
    );

    use_shortcut(
        Shortcut::new(Key::ArrowDown),
        ShortcutScope::FocusedWithin(results_list.focus_scope()),
        move || {
            selected_index.update(|index| {
                *index = (*index + 1).min(results.with(|items| items.len().saturating_sub(1)));
            });
            results_list.scroll_selected_into_view();
        },
    );

    use_shortcut(
        Shortcut::new(Key::Enter),
        ShortcutScope::FocusedItem(results_list.focus_scope()),
        {
            let toast_region = toast_region.clone();
            move || {
                if let Some(command) = results.with(|items| items.get(selected_index.get()).cloned()) {
                    toast_region.show(command.title.to_string());
                    command.run();
                }
            }
        },
    );

    view! {
        layers(fill = true) {
            layer(kind = LayerKind::Content) {
                column(fill = true, gap = 16, padding = 20) {
                    text(role = TextRole::Heading(1), size = 28, weight = FontWeight::Semibold) {
                        "Command search"
                    }

                    text_input(
                        ref = search_input,
                        value = query,
                        placeholder = "Search commands...",
                    ) {}

                    scroll_area(ref = results_list, fill = true) {
                        list(gap = 8) {
                            for (row_index, command) in results.iter().enumerate() keyed by command.id {
                                CommandRow(
                                    selected = row_index == selected_index.get(),
                                    title = command.title,
                                    subtitle = command.subtitle,
                                    on_press = move |_| command.run(),
                                ) {}
                            }
                        }
                    }
                }
            }

            layer(
                kind = LayerKind::Overlay,
                anchor = Anchor::bottom_right(20.0, 20.0),
                pointer_events = PointerEvents::PassThrough,
            ) {
                ToastRegion(ref = toast_region) {}
            }
        }
    }
}

static COMMANDS: &[Command] = &[];

struct Command {
    id: &'static str,
    title: &'static str,
    subtitle: &'static str,
}

impl Command {
    fn run(&self) {}
}