use gpui::{
    AppContext as _, IntoElement, ParentElement as _, Render, Styled as _, TestAppContext,
    VisualTestContext, Window, div,
};
use gpui_native_core::status_dot::{StatusDot, StatusDotVariant};
use gpui_native_theme::{ActiveTheme as _, Theme};

struct DotHost;

impl Render for DotHost {
    fn render(&mut self, _window: &mut Window, _cx: &mut gpui::Context<Self>) -> impl IntoElement {
        div().size_full().p_4().child(
            StatusDot::new("test-dot")
                .variant(StatusDotVariant::Success)
                .label("Synced"),
        )
    }
}

fn dot_window() -> (TestAppContext, gpui::AnyWindowHandle) {
    let mut cx = TestAppContext::single();
    cx.update(Theme::init);
    let window = cx.add_window(|_, _| DotHost);
    let window: gpui::AnyWindowHandle = window.into();
    cx.update_window(window, |_, window, cx| {
        window.draw(cx).clear(cx);
    })
    .unwrap();
    (cx, window)
}

/// A medium dot is half the theme's icon size — big enough to read a state
/// from, small enough to sit beside row text. The label must not grow it.
#[test]
fn the_dot_is_half_the_icon_size() {
    let (cx, window) = dot_window();
    let mut visual = VisualTestContext::from_window(window, &cx);
    let dot = visual.debug_bounds("test-dot").expect("dot missing");

    let side = cx.update(|cx| cx.theme().sizes.medium.icon_size) / 2.;
    assert!(
        ((dot.size.width - side).abs() <= gpui::px(0.5))
            && ((dot.size.height - side).abs() <= gpui::px(0.5)),
        "the dot must be {side:?} wide, got {:?}",
        dot.size
    );
}

#[test]
fn the_dot_keeps_a_square_footprint() {
    let (cx, window) = dot_window();
    let mut visual = VisualTestContext::from_window(window, &cx);
    let dot = visual.debug_bounds("test-dot").expect("dot missing");

    assert!(
        (dot.size.width - dot.size.height).abs() <= gpui::px(0.5),
        "the dot must stay circular: {:?}",
        dot.size
    );
}