// TRACES: FR-UI-5
//! Back closes the presets menu, and the next Back returns to the grid.
//!
//! The menu at the foot of the tool rail is a `PopupWindow`, and showing a
//! popup takes focus off the develop view until it closes. The menu had
//! nothing focusable of its own, so a Back pressed while it was up had no
//! focus item to bubble from, went unanswered, and on Android an unanswered
//! Back is the platform's: it closed the application from develop. Dismissing
//! a menu with the back gesture is the ordinary thing to do, which is why this
//! was seen often.
//!
//! Runs on Slint's testing backend, as `film_list_reaches_every_stock` does.
#![cfg(debug_assertions)]

use std::cell::Cell;
use std::rc::Rc;

use dr_ui::{AppWindow, Develop};
use i_slint_backend_testing::{init_no_event_loop, ElementHandle};
use slint::platform::{Key, PointerEventButton, WindowEvent};
use slint::{ComponentHandle, SharedString};

const MANAGE: &str = "Save or manage…";

fn key(app: &AppWindow, k: Key) {
    let text: SharedString = k.into();
    app.window()
        .dispatch_event(WindowEvent::KeyPressed { text: text.clone() });
    app.window()
        .dispatch_event(WindowEvent::KeyReleased { text });
}

fn menu_open(app: &AppWindow) -> bool {
    ElementHandle::find_by_accessible_label(app, MANAGE)
        .next()
        .is_some()
}

#[test]
fn back_closes_the_presets_menu_then_leaves_develop() {
    init_no_event_loop();
    let app = AppWindow::new().expect("the window builds on the testing backend");
    app.window().set_size(slint::LogicalSize::new(1600., 1200.));
    app.global::<Develop>().set_enabled(true);
    // The rail offers presets only with a photograph to apply them to.
    app.set_total(3);
    let asked = Rc::new(Cell::new(0));
    app.on_back_requested({
        let asked = asked.clone();
        move || {
            asked.set(asked.get() + 1);
            true
        }
    });
    app.show().unwrap();

    ElementHandle::find_by_accessible_label(&app, "Presets")
        .next()
        .expect("the tool rail's presets entry is on screen")
        .mock_single_click(PointerEventButton::Left);
    assert!(menu_open(&app), "clicking Presets opens the menu");

    key(&app, Key::Back);
    assert!(!menu_open(&app), "Back closes the menu");
    assert_eq!(asked.get(), 0, "closing the menu is the whole step");

    key(&app, Key::Back);
    assert_eq!(asked.get(), 1, "the next Back reaches the shell");
}