//! Opt-in, reproducible category/resize measurements. No hardware settings change.
use super::*;
use cosmic::Application;
use cosmic::iced::advanced::renderer::{Headless, Renderer as _};
use cosmic::iced::advanced::{Layout, Shell, clipboard, layout, mouse, renderer, widget::Tree};
use cosmic::iced::{Color, Event, Font, Pixels, Rectangle, Size, window};

fn fixture() -> App {
    let source = std::env::var_os("FERESE_BENCH_CONFIG")
        .map(|p| std::fs::read_to_string(p).unwrap())
        .unwrap_or_else(|| include_str!("../../../packaging/config.kdl").into());
    let (mut app, _) = App::init(
        Core::default(),
        (
            "/unused/settings-performance.kdl".into(),
            Snapshot::parse(source),
            None,
            None,
        ),
    );
    app.options_loaded(all_options::catalog());
    app.connections.snapshot = Some(connections::performance_snapshot());
    app.tray_apps = (0..12)
        .map(|i| tray_controls::Application {
            id: format!("app-{i}"),
            title: format!("Application {i}"),
        })
        .collect();
    app.displays = (0..3)
        .map(|i| displays::Display {
            connector: format!("DP-{}", i + 1),
            identity: format!("Test display {i}"),
            profile: None,
            logical_width: Some(1920),
            focused: i == 0,
            current: Some(displays::Mode {
                width: 3840,
                height: 2160,
                refresh: 60000,
            }),
            modes: vec![
                displays::Mode {
                    width: 3840,
                    height: 2160,
                    refresh: 60000,
                },
                displays::Mode {
                    width: 2560,
                    height: 1440,
                    refresh: 60000,
                },
            ],
        })
        .collect();
    app
}

#[test]
#[ignore = "category/resize profile; requires the matching compositor schema binary"]
fn profile_all_categories_and_resizing() {
    let runtime = tokio::runtime::Builder::new_current_thread()
        .enable_all()
        .build()
        .unwrap();
    let backend = std::env::var("FERESE_BENCH_BACKEND").unwrap_or_else(|_| "wgpu".into());
    let mut renderer = runtime
        .block_on(cosmic::Renderer::new(
            Font::default(),
            Pixels(14.),
            Some(&backend),
        ))
        .unwrap();
    let scale = 2.;
    for page in Page::ALL {
        let mut app = fixture();
        drop(app.update(Message::Page(page)));
        let theme = app.native_palette.native_theme();
        let mut tree: Option<Tree> = None;
        for frame in 0..18 {
            let scenario = if frame == 0 {
                "cold"
            } else if frame < 4 {
                "warm"
            } else if frame < 14 {
                "resize"
            } else {
                "switch"
            };
            if frame >= 14 {
                drop(app.update(Message::Page(Page::General)));
                drop(app.update(Message::Page(page)));
            }
            let size = if (4..14).contains(&frame) && frame % 2 == 0 {
                Size::new(631., 568.)
            } else {
                Size::new(1272., 760.)
            };
            let viewport = Rectangle::with_size(size);
            let mut messages = Vec::new();
            let started = std::time::Instant::now();
            let mut view = app.page_view();
            let tree = tree.get_or_insert_with(|| Tree::new(&view));
            cosmic::iced::advanced::widget::tree::NAMED
                .with(|named| *named.borrow_mut() = tree.take_all_named());
            tree.diff(view.as_widget_mut());
            let node = view.as_widget_mut().layout(
                tree,
                &renderer,
                &layout::Limits::new(Size::ZERO, size),
            );
            cosmic::iced::advanced::widget::tree::NAMED.with(|named| named.borrow_mut().clear());
            view.as_widget_mut().update(
                tree,
                &Event::Window(window::Event::RedrawRequested(std::time::Instant::now())),
                Layout::new(&node),
                mouse::Cursor::Unavailable,
                &renderer,
                &mut clipboard::Null,
                &mut Shell::new(&mut messages),
                &viewport,
            );
            let layout_us = started.elapsed().as_micros();
            renderer.reset(viewport);
            let started = std::time::Instant::now();
            view.as_widget().draw(
                tree,
                &mut renderer,
                &theme,
                &renderer::Style {
                    text_color: Color::WHITE,
                    icon_color: Color::WHITE,
                    scale_factor: scale as f64,
                },
                Layout::new(&node),
                mouse::Cursor::Unavailable,
                &viewport,
            );
            let draw_us = started.elapsed().as_micros();
            drop(view);
            let started = std::time::Instant::now();
            let pixels = Headless::screenshot(
                &mut renderer,
                Size::new((size.width * scale) as u32, (size.height * scale) as u32),
                scale,
                theme.cosmic().bg_color().into(),
            );
            let render_us = started.elapsed().as_micros();
            if matches!(frame, 0 | 4 | 5)
                && let Some(dir) = std::env::var_os("FERESE_BENCH_IMAGES_DIR")
            {
                let path = PathBuf::from(dir);
                std::fs::create_dir_all(&path).unwrap();
                image::save_buffer(
                    path.join(format!("{page:?}-{frame}.png")),
                    &pixels,
                    (size.width * scale) as u32,
                    (size.height * scale) as u32,
                    image::ColorType::Rgba8,
                )
                .unwrap();
            }
            for message in messages {
                drop(app.update(message));
            }
            eprintln!(
                "AUDIT {}",
                serde_json::json!({"backend":backend,"page":format!("{page:?}"),"frame":frame,"scenario":scenario,"width":size.width,"layout_us":layout_us,"draw_us":draw_us,"render_us":render_us})
            );
        }
    }
}