use adw::prelude::*;
use gtk::glib;
use std::cell::RefCell;
use std::rc::Rc;
use std::sync::atomic::{AtomicBool, Ordering};
use std::sync::Arc;

use crate::step_indicator::StepIndicator;
use crate::wizard::WizardState;

pub const APP_ID: &str = "live.lashman.Pixstrip";

/// Shared app state accessible from all UI callbacks
#[derive(Clone)]
pub struct AppState {
    pub wizard: Rc<RefCell<WizardState>>,
    pub loaded_files: Rc<RefCell<Vec<std::path::PathBuf>>>,
    pub output_dir: Rc<RefCell<Option<std::path::PathBuf>>>,
}

#[derive(Clone)]
struct WizardUi {
    nav_view: adw::NavigationView,
    step_indicator: StepIndicator,
    back_button: gtk::Button,
    next_button: gtk::Button,
    title: adw::WindowTitle,
    pages: Vec<adw::NavigationPage>,
    toast_overlay: adw::ToastOverlay,
    state: AppState,
}

pub fn build_app() -> adw::Application {
    let app = adw::Application::builder()
        .application_id(APP_ID)
        .build();

    app.connect_activate(build_ui);
    setup_shortcuts(&app);

    app
}

fn setup_shortcuts(app: &adw::Application) {
    app.set_accels_for_action("win.next-step", &["<Alt>Right"]);
    app.set_accels_for_action("win.prev-step", &["<Alt>Left"]);
    app.set_accels_for_action("win.process", &["<Control>Return"]);
    for i in 1..=9 {
        app.set_accels_for_action(
            &format!("win.goto-step({})", i),
            &[&format!("<Alt>{}", i)],
        );
    }
    app.set_accels_for_action("win.add-files", &["<Control>o"]);
}

fn build_ui(app: &adw::Application) {
    let app_state = AppState {
        wizard: Rc::new(RefCell::new(WizardState::new())),
        loaded_files: Rc::new(RefCell::new(Vec::new())),
        output_dir: Rc::new(RefCell::new(None)),
    };

    // Header bar
    let header = adw::HeaderBar::new();
    let title = adw::WindowTitle::new("Pixstrip", "Batch Image Processor");
    header.set_title_widget(Some(&title));

    // Hamburger menu
    let menu = build_menu();
    let menu_button = gtk::MenuButton::builder()
        .icon_name("open-menu-symbolic")
        .menu_model(&menu)
        .primary(true)
        .tooltip_text("Main Menu")
        .build();
    header.pack_end(&menu_button);

    // Step indicator
    let step_indicator = StepIndicator::new(&app_state.wizard.borrow().step_names());

    // Navigation view for wizard content
    let nav_view = adw::NavigationView::new();
    nav_view.set_vexpand(true);

    // Build wizard pages
    let pages = crate::wizard::build_wizard_pages();
    for page in &pages {
        nav_view.add(page);
    }

    // Bottom action bar
    let back_button = gtk::Button::builder()
        .label("Back")
        .tooltip_text("Go to previous step (Alt+Left)")
        .build();
    back_button.add_css_class("flat");

    let next_button = gtk::Button::builder()
        .label("Next")
        .tooltip_text("Go to next step (Alt+Right)")
        .build();
    next_button.add_css_class("suggested-action");

    let bottom_box = gtk::CenterBox::new();
    bottom_box.set_start_widget(Some(&back_button));
    bottom_box.set_end_widget(Some(&next_button));
    bottom_box.set_margin_start(12);
    bottom_box.set_margin_end(12);
    bottom_box.set_margin_top(6);
    bottom_box.set_margin_bottom(6);

    let bottom_bar = gtk::Box::new(gtk::Orientation::Vertical, 0);
    let separator = gtk::Separator::new(gtk::Orientation::Horizontal);
    bottom_bar.append(&separator);
    bottom_bar.append(&bottom_box);

    // Main content layout
    let content_box = gtk::Box::new(gtk::Orientation::Vertical, 0);
    content_box.append(step_indicator.widget());
    content_box.append(&nav_view);

    // Toolbar view with header and bottom bar
    let toolbar_view = adw::ToolbarView::new();
    toolbar_view.add_top_bar(&header);
    toolbar_view.set_content(Some(&content_box));
    toolbar_view.add_bottom_bar(&bottom_bar);

    // Toast overlay wraps everything for in-app notifications
    let toast_overlay = adw::ToastOverlay::new();
    toast_overlay.set_child(Some(&toolbar_view));

    // Window
    let window = adw::ApplicationWindow::builder()
        .application(app)
        .default_width(900)
        .default_height(700)
        .content(&toast_overlay)
        .title("Pixstrip")
        .build();

    let ui = WizardUi {
        nav_view,
        step_indicator,
        back_button,
        next_button,
        title,
        pages,
        toast_overlay,
        state: app_state,
    };

    setup_window_actions(&window, &ui);
    update_nav_buttons(
        &ui.state.wizard.borrow(),
        &ui.back_button,
        &ui.next_button,
    );
    ui.step_indicator.set_current(0);

    window.present();
}

fn build_menu() -> gtk::gio::Menu {
    let menu = gtk::gio::Menu::new();
    menu.append(Some("Settings"), Some("win.show-settings"));
    menu.append(Some("History"), Some("win.show-history"));
    menu
}

fn setup_window_actions(window: &adw::ApplicationWindow, ui: &WizardUi) {
    let action_group = gtk::gio::SimpleActionGroup::new();

    // Next step action
    {
        let ui = ui.clone();
        let action = gtk::gio::SimpleAction::new("next-step", None);
        action.connect_activate(move |_, _| {
            let mut s = ui.state.wizard.borrow_mut();
            if s.can_go_next() {
                s.go_next();
                let idx = s.current_step;
                drop(s);
                navigate_to_step(&ui, idx);
            }
        });
        action_group.add_action(&action);
    }

    // Previous step action
    {
        let ui = ui.clone();
        let action = gtk::gio::SimpleAction::new("prev-step", None);
        action.connect_activate(move |_, _| {
            let mut s = ui.state.wizard.borrow_mut();
            if s.can_go_back() {
                s.go_back();
                let idx = s.current_step;
                drop(s);
                navigate_to_step(&ui, idx);
            }
        });
        action_group.add_action(&action);
    }

    // Go to specific step action
    {
        let ui = ui.clone();
        let action = gtk::gio::SimpleAction::new(
            "goto-step",
            Some(&i32::static_variant_type()),
        );
        action.connect_activate(move |_, param| {
            if let Some(step) = param.and_then(|p| p.get::<i32>()) {
                let target = (step - 1) as usize;
                let s = ui.state.wizard.borrow();
                if target < s.total_steps && s.visited[target] {
                    drop(s);
                    ui.state.wizard.borrow_mut().current_step = target;
                    navigate_to_step(&ui, target);
                }
            }
        });
        action_group.add_action(&action);
    }

    // Process action - runs the pipeline
    {
        let ui = ui.clone();
        let window = window.clone();
        let action = gtk::gio::SimpleAction::new("process", None);
        action.connect_activate(move |_, _| {
            let files = ui.state.loaded_files.borrow().clone();
            if files.is_empty() {
                let toast = adw::Toast::new("No images loaded - go to Step 2 to add images");
                ui.toast_overlay.add_toast(toast);
                return;
            }
            run_processing(&window, &ui);
        });
        action_group.add_action(&action);
    }

    // Add files action - opens file chooser
    {
        let window = window.clone();
        let ui = ui.clone();
        let action = gtk::gio::SimpleAction::new("add-files", None);
        action.connect_activate(move |_, _| {
            open_file_chooser(&window, &ui);
        });
        action_group.add_action(&action);
    }

    // Settings action - opens settings dialog
    {
        let window = window.clone();
        let action = gtk::gio::SimpleAction::new("show-settings", None);
        action.connect_activate(move |_, _| {
            let dialog = crate::settings::build_settings_dialog();
            dialog.present(Some(&window));
        });
        action_group.add_action(&action);
    }

    // History action - shows history dialog
    {
        let window = window.clone();
        let action = gtk::gio::SimpleAction::new("show-history", None);
        action.connect_activate(move |_, _| {
            show_history_dialog(&window);
        });
        action_group.add_action(&action);
    }

    // Connect button clicks
    ui.back_button.connect_clicked({
        let action_group = action_group.clone();
        move |_| {
            ActionGroupExt::activate_action(&action_group, "prev-step", None);
        }
    });

    ui.next_button.connect_clicked({
        let action_group = action_group.clone();
        let ui = ui.clone();
        move |_| {
            let s = ui.state.wizard.borrow();
            if s.is_last_step() {
                drop(s);
                ActionGroupExt::activate_action(&action_group, "process", None);
            } else {
                drop(s);
                ActionGroupExt::activate_action(&action_group, "next-step", None);
            }
        }
    });

    window.insert_action_group("win", Some(&action_group));
}

fn navigate_to_step(ui: &WizardUi, target: usize) {
    let s = ui.state.wizard.borrow();

    // Update step indicator
    ui.step_indicator.set_current(target);
    for (i, visited) in s.visited.iter().enumerate() {
        if *visited && i != target {
            ui.step_indicator.set_completed(i);
        }
    }

    // Navigate - replace entire stack up to target
    if target < ui.pages.len() {
        ui.nav_view.replace(&ui.pages[..=target]);
        ui.title.set_subtitle(&ui.pages[target].title());
    }

    update_nav_buttons(&s, &ui.back_button, &ui.next_button);
}

fn update_nav_buttons(state: &WizardState, back_button: &gtk::Button, next_button: &gtk::Button) {
    back_button.set_sensitive(state.can_go_back());
    back_button.set_visible(state.current_step > 0);

    if state.is_last_step() {
        next_button.set_label("Process");
        next_button.remove_css_class("suggested-action");
        next_button.add_css_class("suggested-action");
        next_button.set_tooltip_text(Some("Start processing (Ctrl+Enter)"));
    } else {
        next_button.set_label("Next");
        next_button.add_css_class("suggested-action");
        next_button.set_tooltip_text(Some("Go to next step (Alt+Right)"));
    }
}

fn open_file_chooser(window: &adw::ApplicationWindow, ui: &WizardUi) {
    let dialog = gtk::FileDialog::builder()
        .title("Select Images")
        .modal(true)
        .build();

    let filter = gtk::FileFilter::new();
    filter.set_name(Some("Image files"));
    filter.add_mime_type("image/jpeg");
    filter.add_mime_type("image/png");
    filter.add_mime_type("image/webp");
    filter.add_mime_type("image/avif");
    filter.add_mime_type("image/gif");
    filter.add_mime_type("image/tiff");
    filter.add_mime_type("image/bmp");

    let filters = gtk::gio::ListStore::new::<gtk::FileFilter>();
    filters.append(&filter);
    dialog.set_filters(Some(&filters));
    dialog.set_default_filter(Some(&filter));

    let ui = ui.clone();
    dialog.open_multiple(Some(window), gtk::gio::Cancellable::NONE, move |result| {
        if let Ok(files) = result {
            let mut paths = ui.state.loaded_files.borrow_mut();
            for i in 0..files.n_items() {
                if let Some(file) = files.item(i)
                    && let Some(gfile) = file.downcast_ref::<gtk::gio::File>()
                    && let Some(path) = gfile.path()
                    && !paths.contains(&path)
                {
                    paths.push(path);
                }
            }
            let count = paths.len();
            drop(paths);

            // Update the images step UI if we can find the label
            update_images_count_label(&ui, count);
        }
    });
}

fn update_images_count_label(ui: &WizardUi, count: usize) {
    // Find the step-images page and switch its stack to "loaded" if we have files
    if let Some(page) = ui.pages.get(1)
        && let Some(stack) = page.child().and_downcast::<gtk::Stack>()
    {
        if count > 0 {
            stack.set_visible_child_name("loaded");
        }
        if let Some(loaded_box) = stack.child_by_name("loaded") {
            update_count_in_box(&loaded_box, count);
        }
    }
}

fn update_count_in_box(widget: &gtk::Widget, count: usize) {
    // Walk the widget tree to find the heading label with "images" text
    if let Some(label) = widget.downcast_ref::<gtk::Label>() {
        if label.css_classes().iter().any(|c| c == "heading") {
            let files = pixstrip_core::storage::PresetStore::new(); // just for format_bytes
            let _ = files; // unused
            label.set_label(&format!("{} images loaded", count));
        }
        return;
    }
    if let Some(bx) = widget.downcast_ref::<gtk::Box>() {
        let mut child = bx.first_child();
        while let Some(c) = child {
            update_count_in_box(&c, count);
            child = c.next_sibling();
        }
    }
}

fn show_history_dialog(window: &adw::ApplicationWindow) {
    let dialog = adw::Dialog::builder()
        .title("Processing History")
        .content_width(500)
        .content_height(400)
        .build();

    let toolbar_view = adw::ToolbarView::new();
    let header = adw::HeaderBar::new();
    toolbar_view.add_top_bar(&header);

    let scrolled = gtk::ScrolledWindow::builder()
        .hscrollbar_policy(gtk::PolicyType::Never)
        .vexpand(true)
        .build();

    let content = gtk::Box::builder()
        .orientation(gtk::Orientation::Vertical)
        .spacing(0)
        .build();

    let history = pixstrip_core::storage::HistoryStore::new();
    match history.list() {
        Ok(entries) if entries.is_empty() => {
            let empty = adw::StatusPage::builder()
                .title("No History Yet")
                .description("Processed batches will appear here")
                .icon_name("document-open-recent-symbolic")
                .vexpand(true)
                .build();
            content.append(&empty);
        }
        Ok(entries) => {
            let group = adw::PreferencesGroup::builder()
                .title("Recent Batches")
                .margin_start(12)
                .margin_end(12)
                .margin_top(12)
                .build();

            for entry in entries.iter().rev() {
                let savings = if entry.total_input_bytes > 0 {
                    let pct = (1.0
                        - entry.total_output_bytes as f64 / entry.total_input_bytes as f64)
                        * 100.0;
                    format!("{:.0}% saved", pct)
                } else {
                    "N/A".into()
                };

                let subtitle = format!(
                    "{}/{} succeeded - {} - {}",
                    entry.succeeded,
                    entry.total,
                    savings,
                    format_duration(entry.elapsed_ms)
                );

                let preset_label = entry
                    .preset_name
                    .as_deref()
                    .unwrap_or("Custom workflow");

                let row = adw::ActionRow::builder()
                    .title(preset_label)
                    .subtitle(&subtitle)
                    .build();
                row.add_prefix(&gtk::Image::from_icon_name("image-x-generic-symbolic"));
                group.add(&row);
            }
            content.append(&group);
        }
        Err(e) => {
            let error = adw::StatusPage::builder()
                .title("Could not load history")
                .description(e.to_string())
                .icon_name("dialog-error-symbolic")
                .vexpand(true)
                .build();
            content.append(&error);
        }
    }

    scrolled.set_child(Some(&content));
    toolbar_view.set_content(Some(&scrolled));
    dialog.set_child(Some(&toolbar_view));
    dialog.present(Some(window));
}

fn run_processing(_window: &adw::ApplicationWindow, ui: &WizardUi) {
    let files = ui.state.loaded_files.borrow().clone();
    if files.is_empty() {
        return;
    }

    let input_dir = files[0]
        .parent()
        .unwrap_or_else(|| std::path::Path::new("."))
        .to_path_buf();

    let output_dir = ui
        .state
        .output_dir
        .borrow()
        .clone()
        .unwrap_or_else(|| input_dir.join("processed"));

    // Build job - for now use default settings (resize off, compress high, strip metadata)
    let mut job = pixstrip_core::pipeline::ProcessingJob::new(&input_dir, &output_dir);
    job.compress = Some(pixstrip_core::operations::CompressConfig::Preset(
        pixstrip_core::types::QualityPreset::High,
    ));
    job.metadata = Some(pixstrip_core::operations::MetadataConfig::StripAll);

    for file in &files {
        job.add_source(file);
    }

    // Build processing UI inline in the nav_view
    let processing_page = crate::processing::build_processing_page();
    ui.nav_view.push(&processing_page);

    // Hide bottom nav buttons during processing
    ui.back_button.set_visible(false);
    ui.next_button.set_visible(false);
    ui.title.set_subtitle("Processing...");

    // Get references to progress widgets inside the page
    let progress_bar = find_widget_by_type::<gtk::ProgressBar>(&processing_page);
    let cancel_flag = Arc::new(AtomicBool::new(false));

    // Find cancel button and wire it
    wire_cancel_button(&processing_page, cancel_flag.clone());

    // Run processing in a background thread
    let (tx, rx) = std::sync::mpsc::channel::<ProcessingMessage>();

    let cancel = cancel_flag.clone();
    std::thread::spawn(move || {
        let executor = pixstrip_core::executor::PipelineExecutor::with_cancel(cancel);
        let result = executor.execute(&job, |update| {
            let _ = tx.send(ProcessingMessage::Progress {
                current: update.current,
                total: update.total,
                file: update.current_file,
            });
        });
        match result {
            Ok(r) => {
                let _ = tx.send(ProcessingMessage::Done(r));
            }
            Err(e) => {
                let _ = tx.send(ProcessingMessage::Error(e.to_string()));
            }
        }
    });

    // Poll for messages from the processing thread
    let ui_for_rx = ui.clone();
    glib::timeout_add_local(std::time::Duration::from_millis(50), move || {
        while let Ok(msg) = rx.try_recv() {
            match msg {
                ProcessingMessage::Progress {
                    current,
                    total,
                    file,
                } => {
                    if let Some(ref bar) = progress_bar {
                        bar.set_fraction(current as f64 / total as f64);
                        bar.set_text(Some(&format!("{}/{} - {}", current, total, file)));
                    }
                    update_progress_labels(&ui_for_rx.nav_view, current, total, &file);
                }
                ProcessingMessage::Done(result) => {
                    show_results(&ui_for_rx, &result);
                    return glib::ControlFlow::Break;
                }
                ProcessingMessage::Error(err) => {
                    let toast = adw::Toast::new(&format!("Processing failed: {}", err));
                    ui_for_rx.toast_overlay.add_toast(toast);
                    ui_for_rx.back_button.set_visible(true);
                    ui_for_rx.next_button.set_visible(true);
                    if let Some(visible) = ui_for_rx.nav_view.visible_page()
                        && visible.tag().as_deref() == Some("processing")
                    {
                        ui_for_rx.nav_view.pop();
                    }
                    return glib::ControlFlow::Break;
                }
            }
        }
        glib::ControlFlow::Continue
    });
}

fn show_results(
    ui: &WizardUi,
    result: &pixstrip_core::executor::BatchResult,
) {
    let results_page = crate::processing::build_results_page();

    // Update result stats by walking the widget tree
    update_results_stats(&results_page, result);

    // Wire the action buttons
    wire_results_actions(ui, &results_page);

    ui.nav_view.push(&results_page);

    ui.title.set_subtitle("Processing Complete");
    ui.back_button.set_visible(false);
    ui.next_button.set_label("Process More");
    ui.next_button.set_visible(true);

    // Save history
    let history = pixstrip_core::storage::HistoryStore::new();
    let _ = history.add(pixstrip_core::storage::HistoryEntry {
        timestamp: format!(
            "{}",
            std::time::SystemTime::now()
                .duration_since(std::time::UNIX_EPOCH)
                .unwrap_or_default()
                .as_secs()
        ),
        input_dir: String::new(),
        output_dir: String::new(),
        preset_name: None,
        total: result.total,
        succeeded: result.succeeded,
        failed: result.failed,
        total_input_bytes: result.total_input_bytes,
        total_output_bytes: result.total_output_bytes,
        elapsed_ms: result.elapsed_ms,
        output_files: vec![],
    });

    // Show toast
    let savings = if result.total_input_bytes > 0 {
        let pct =
            (1.0 - result.total_output_bytes as f64 / result.total_input_bytes as f64) * 100.0;
        format!(
            "{} images processed, {:.0}% space saved",
            result.succeeded, pct
        )
    } else {
        format!("{} images processed", result.succeeded)
    };
    let toast = adw::Toast::new(&savings);
    toast.set_timeout(5);
    ui.toast_overlay.add_toast(toast);
}

fn update_results_stats(
    page: &adw::NavigationPage,
    result: &pixstrip_core::executor::BatchResult,
) {
    // Walk the widget tree looking for ActionRows to update
    walk_widgets(&page.child(), &|widget| {
        if let Some(row) = widget.downcast_ref::<adw::ActionRow>() {
            let title = row.title();
            match title.as_str() {
                "Images processed" => {
                    row.set_subtitle(&format!("{} images", result.succeeded));
                }
                "Original size" => {
                    row.set_subtitle(&format_bytes(result.total_input_bytes));
                }
                "Output size" => {
                    row.set_subtitle(&format_bytes(result.total_output_bytes));
                }
                "Space saved" => {
                    if result.total_input_bytes > 0 {
                        let pct = (1.0
                            - result.total_output_bytes as f64
                                / result.total_input_bytes as f64)
                            * 100.0;
                        row.set_subtitle(&format!("{:.1}%", pct));
                    }
                }
                "Processing time" => {
                    row.set_subtitle(&format_duration(result.elapsed_ms));
                }
                _ => {}
            }
        }
    });
}

fn wire_results_actions(
    ui: &WizardUi,
    page: &adw::NavigationPage,
) {
    walk_widgets(&page.child(), &|widget| {
        if let Some(row) = widget.downcast_ref::<adw::ActionRow>() {
            match row.title().as_str() {
                "Open Output Folder" => {
                    let ui = ui.clone();
                    row.connect_activated(move |_| {
                        let output = ui.state.output_dir.borrow().clone();
                        if let Some(dir) = output {
                            let _ = gtk::gio::AppInfo::launch_default_for_uri(
                                &format!("file://{}", dir.display()),
                                gtk::gio::AppLaunchContext::NONE,
                            );
                        }
                    });
                }
                "Process Another Batch" => {
                    let ui = ui.clone();
                    row.connect_activated(move |_| {
                        reset_wizard(&ui);
                    });
                }
                _ => {}
            }
        }
    });
}

fn reset_wizard(ui: &WizardUi) {
    // Reset state
    {
        let mut s = ui.state.wizard.borrow_mut();
        s.current_step = 0;
        s.visited = vec![false; s.total_steps];
        s.visited[0] = true;
    }
    ui.state.loaded_files.borrow_mut().clear();

    // Reset nav
    ui.nav_view.replace(&ui.pages[..1]);
    ui.step_indicator.set_current(0);
    ui.title.set_subtitle("Batch Image Processor");
    ui.back_button.set_visible(false);
    ui.next_button.set_label("Next");
    ui.next_button.set_visible(true);
    ui.next_button.add_css_class("suggested-action");
}

fn wire_cancel_button(page: &adw::NavigationPage, cancel_flag: Arc<AtomicBool>) {
    walk_widgets(&page.child(), &|widget| {
        if let Some(button) = widget.downcast_ref::<gtk::Button>()
            && button.label().as_deref() == Some("Cancel")
        {
            let flag = cancel_flag.clone();
            button.connect_clicked(move |btn| {
                flag.store(true, Ordering::Relaxed);
                btn.set_sensitive(false);
                btn.set_label("Cancelling...");
            });
        }
    });
}

fn update_progress_labels(nav_view: &adw::NavigationView, current: usize, total: usize, file: &str) {
    if let Some(page) = nav_view.visible_page() {
        walk_widgets(&page.child(), &|widget| {
            if let Some(label) = widget.downcast_ref::<gtk::Label>() {
                if label.css_classes().iter().any(|c| c == "heading")
                    && label.label().contains("images")
                {
                    label.set_label(&format!("{} / {} images", current, total));
                }
                if label.css_classes().iter().any(|c| c == "dim-label")
                    && label.label().contains("Estimating")
                {
                    label.set_label(&format!("Current: {}", file));
                }
            }
        });
    }
}

// --- Utility functions ---

enum ProcessingMessage {
    Progress {
        current: usize,
        total: usize,
        file: String,
    },
    Done(pixstrip_core::executor::BatchResult),
    Error(String),
}

fn find_widget_by_type<T: IsA<gtk::Widget>>(page: &adw::NavigationPage) -> Option<T> {
    let result: RefCell<Option<T>> = RefCell::new(None);
    walk_widgets(&page.child(), &|widget| {
        if result.borrow().is_none()
            && let Some(w) = widget.downcast_ref::<T>()
        {
            *result.borrow_mut() = Some(w.clone());
        }
    });
    result.into_inner()
}

fn walk_widgets(widget: &Option<gtk::Widget>, f: &dyn Fn(&gtk::Widget)) {
    let Some(w) = widget else { return };
    f(w);
    let mut child = w.first_child();
    while let Some(c) = child {
        walk_widgets(&Some(c.clone()), f);
        child = c.next_sibling();
    }
}


fn format_bytes(bytes: u64) -> String {
    if bytes < 1024 {
        format!("{} B", bytes)
    } else if bytes < 1024 * 1024 {
        format!("{:.1} KB", bytes as f64 / 1024.0)
    } else if bytes < 1024 * 1024 * 1024 {
        format!("{:.1} MB", bytes as f64 / (1024.0 * 1024.0))
    } else {
        format!("{:.1} GB", bytes as f64 / (1024.0 * 1024.0 * 1024.0))
    }
}

fn format_duration(ms: u64) -> String {
    if ms < 1000 {
        format!("{}ms", ms)
    } else if ms < 60_000 {
        format!("{:.1}s", ms as f64 / 1000.0)
    } else {
        let mins = ms / 60_000;
        let secs = (ms % 60_000) / 1000;
        format!("{}m {}s", mins, secs)
    }
}