rusticity-term 0.1.10

use crate::app::App;
use crate::common::{CyclicEnum, InputFocus};
use crate::keymap::Mode;
use crate::ui::lambda::{filtered_lambda_functions, DetailTab as LambdaDetailTab, FILTER_CONTROLS};
use crate::ui::monitoring::MonitoringState;

// ── Navigation ────────────────────────────────────────────────────────────────

pub fn next_item(app: &mut App) {
    if app.lambda_state.current_function.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Code
    {
        if let Some(func_name) = &app.lambda_state.current_function.clone() {
            if let Some(func) = app
                .lambda_state
                .table
                .items
                .iter()
                .find(|f| f.name == *func_name)
            {
                let max = func.layers.len().saturating_sub(1);
                if !func.layers.is_empty() {
                    app.lambda_state.layer_selected =
                        (app.lambda_state.layer_selected + 1).min(max);
                }
            }
        }
    } else if app.lambda_state.current_function.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Versions
    {
        let filtered: Vec<_> = app
            .lambda_state
            .version_table
            .items
            .iter()
            .filter(|v| {
                app.lambda_state.version_table.filter.is_empty()
                    || v.version
                        .to_lowercase()
                        .contains(&app.lambda_state.version_table.filter.to_lowercase())
                    || v.aliases
                        .to_lowercase()
                        .contains(&app.lambda_state.version_table.filter.to_lowercase())
                    || v.description
                        .to_lowercase()
                        .contains(&app.lambda_state.version_table.filter.to_lowercase())
            })
            .collect();
        if !filtered.is_empty() {
            app.lambda_state.version_table.selected =
                (app.lambda_state.version_table.selected + 1).min(filtered.len() - 1);
            app.lambda_state.version_table.snap_to_page();
        }
    } else if app.lambda_state.current_function.is_some()
        && (app.lambda_state.detail_tab == LambdaDetailTab::Aliases
            || (app.lambda_state.current_version.is_some()
                && app.lambda_state.detail_tab == LambdaDetailTab::Configuration))
    {
        let version_filter = app.lambda_state.current_version.clone();
        let filtered: Vec<_> = app
            .lambda_state
            .alias_table
            .items
            .iter()
            .filter(|a| {
                (version_filter.is_none() || a.versions.contains(version_filter.as_ref().unwrap()))
                    && (app.lambda_state.alias_table.filter.is_empty()
                        || a.name
                            .to_lowercase()
                            .contains(&app.lambda_state.alias_table.filter.to_lowercase())
                        || a.versions
                            .to_lowercase()
                            .contains(&app.lambda_state.alias_table.filter.to_lowercase())
                        || a.description
                            .to_lowercase()
                            .contains(&app.lambda_state.alias_table.filter.to_lowercase()))
            })
            .collect();
        if !filtered.is_empty() {
            app.lambda_state.alias_table.selected =
                (app.lambda_state.alias_table.selected + 1).min(filtered.len() - 1);
            app.lambda_state.alias_table.snap_to_page();
        }
    } else if app.lambda_state.current_function.is_none() {
        let filtered = filtered_lambda_functions(app);
        if !filtered.is_empty() {
            app.lambda_state.table.next_item(filtered.len());
            app.lambda_state.table.snap_to_page();
        }
    }
}

pub fn prev_item(app: &mut App) {
    if app.lambda_state.current_function.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Code
    {
        app.lambda_state.layer_selected = app.lambda_state.layer_selected.saturating_sub(1);
    } else if app.lambda_state.current_function.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Versions
    {
        app.lambda_state.version_table.prev_item();
    } else if app.lambda_state.current_function.is_some()
        && (app.lambda_state.detail_tab == LambdaDetailTab::Aliases
            || (app.lambda_state.current_version.is_some()
                && app.lambda_state.detail_tab == LambdaDetailTab::Configuration))
    {
        app.lambda_state.alias_table.prev_item();
    } else if app.lambda_state.current_function.is_none() {
        app.lambda_state.table.prev_item();
    }
}

pub fn page_down_filter_input(app: &mut App) {
    if app.lambda_state.current_function.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Versions
        && app.lambda_state.version_input_focus == InputFocus::Pagination
    {
        let page_size = app.lambda_state.version_table.page_size.value();
        let filtered_count: usize = app
            .lambda_state
            .version_table
            .items
            .iter()
            .filter(|v| {
                app.lambda_state.version_table.filter.is_empty()
                    || v.version
                        .to_lowercase()
                        .contains(&app.lambda_state.version_table.filter.to_lowercase())
                    || v.aliases
                        .to_lowercase()
                        .contains(&app.lambda_state.version_table.filter.to_lowercase())
                    || v.description
                        .to_lowercase()
                        .contains(&app.lambda_state.version_table.filter.to_lowercase())
            })
            .count();
        let target = app.lambda_state.version_table.selected + page_size;
        app.lambda_state.version_table.selected = target.min(filtered_count.saturating_sub(1));
    } else if app.lambda_state.current_function.is_some()
        && (app.lambda_state.detail_tab == LambdaDetailTab::Aliases
            || (app.lambda_state.current_version.is_some()
                && app.lambda_state.detail_tab == LambdaDetailTab::Configuration))
        && app.lambda_state.alias_input_focus == InputFocus::Pagination
    {
        let page_size = app.lambda_state.alias_table.page_size.value();
        let version_filter = app.lambda_state.current_version.clone();
        let filtered_count = app
            .lambda_state
            .alias_table
            .items
            .iter()
            .filter(|a| {
                (version_filter.is_none() || a.versions.contains(version_filter.as_ref().unwrap()))
                    && (app.lambda_state.alias_table.filter.is_empty()
                        || a.name
                            .to_lowercase()
                            .contains(&app.lambda_state.alias_table.filter.to_lowercase())
                        || a.versions
                            .to_lowercase()
                            .contains(&app.lambda_state.alias_table.filter.to_lowercase())
                        || a.description
                            .to_lowercase()
                            .contains(&app.lambda_state.alias_table.filter.to_lowercase()))
            })
            .count();
        let target = app.lambda_state.alias_table.selected + page_size;
        app.lambda_state.alias_table.selected = target.min(filtered_count.saturating_sub(1));
    } else if app.lambda_state.current_function.is_none() {
        let page_size = app.lambda_state.table.page_size.value();
        let filtered_count = filtered_lambda_functions(app).len();
        app.lambda_state.input_focus.handle_page_down(
            &mut app.lambda_state.table.selected,
            &mut app.lambda_state.table.scroll_offset,
            page_size,
            filtered_count,
        );
    }
}

pub fn page_down_normal(app: &mut App) {
    let len = filtered_lambda_functions(app).len();
    app.lambda_state.table.page_down(len);
}

pub fn page_up_filter_input(app: &mut App) {
    if app.lambda_state.current_function.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Versions
        && app.lambda_state.version_input_focus == InputFocus::Pagination
    {
        let page_size = app.lambda_state.version_table.page_size.value();
        app.lambda_state.version_table.selected = app
            .lambda_state
            .version_table
            .selected
            .saturating_sub(page_size);
    } else if app.lambda_state.current_function.is_some()
        && (app.lambda_state.detail_tab == LambdaDetailTab::Aliases
            || (app.lambda_state.current_version.is_some()
                && app.lambda_state.detail_tab == LambdaDetailTab::Configuration))
        && app.lambda_state.alias_input_focus == InputFocus::Pagination
    {
        let page_size = app.lambda_state.alias_table.page_size.value();
        app.lambda_state.alias_table.selected = app
            .lambda_state
            .alias_table
            .selected
            .saturating_sub(page_size);
    } else if app.lambda_state.current_function.is_none() {
        let page_size = app.lambda_state.table.page_size.value();
        app.lambda_state.input_focus.handle_page_up(
            &mut app.lambda_state.table.selected,
            &mut app.lambda_state.table.scroll_offset,
            page_size,
        );
    }
}

pub fn page_up_normal(app: &mut App) {
    app.lambda_state.table.page_up();
}

pub fn scroll_up(app: &mut App) {
    if app.lambda_state.current_function.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Monitor
        && !app.lambda_state.is_metrics_loading()
    {
        app.lambda_state
            .set_monitoring_scroll(app.lambda_state.monitoring_scroll().saturating_sub(1));
    }
}

pub fn scroll_down(app: &mut App) {
    if app.lambda_state.current_function.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Monitor
        && !app.lambda_state.is_metrics_loading()
    {
        app.lambda_state
            .set_monitoring_scroll((app.lambda_state.monitoring_scroll() + 1).min(9));
    }
}

pub fn expand_row(app: &mut App) {
    if app.lambda_state.current_function.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Code
    {
        if app.lambda_state.layer_expanded != Some(app.lambda_state.layer_selected) {
            app.lambda_state.layer_expanded = Some(app.lambda_state.layer_selected);
        } else {
            app.lambda_state.layer_expanded = None;
        }
    } else if app.lambda_state.current_function.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Versions
    {
        app.lambda_state.version_table.toggle_expand();
    } else if app.lambda_state.current_function.is_some()
        && (app.lambda_state.detail_tab == LambdaDetailTab::Aliases
            || (app.lambda_state.current_version.is_some()
                && app.lambda_state.detail_tab == LambdaDetailTab::Configuration))
    {
        app.lambda_state.alias_table.toggle_expand();
    } else if app.lambda_state.current_function.is_none() {
        app.lambda_state.table.expand();
    }
}

pub fn collapse_row(app: &mut App) {
    app.lambda_state.table.collapse();
}

pub fn prev_pane(app: &mut App) {
    if app.lambda_state.current_function.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Code
    {
        app.lambda_state.layer_expanded = None;
    } else if app.lambda_state.current_function.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Versions
    {
        app.lambda_state.version_table.collapse();
    } else if app.lambda_state.current_function.is_some()
        && (app.lambda_state.detail_tab == LambdaDetailTab::Aliases
            || (app.lambda_state.current_version.is_some()
                && app.lambda_state.detail_tab == LambdaDetailTab::Configuration))
    {
        app.lambda_state.alias_table.collapse();
    } else if app.lambda_state.current_function.is_none() {
        app.lambda_state.table.collapse();
    }
}

pub fn go_to_page(app: &mut App, page: usize) {
    if app.lambda_state.current_function.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Versions
    {
        let filtered_count = app
            .lambda_state
            .version_table
            .filtered(|v| {
                app.lambda_state.version_table.filter.is_empty()
                    || v.version
                        .to_lowercase()
                        .contains(&app.lambda_state.version_table.filter.to_lowercase())
                    || v.aliases
                        .to_lowercase()
                        .contains(&app.lambda_state.version_table.filter.to_lowercase())
                    || v.description
                        .to_lowercase()
                        .contains(&app.lambda_state.version_table.filter.to_lowercase())
            })
            .len();
        app.lambda_state
            .version_table
            .goto_page(page, filtered_count);
    } else {
        let filtered_count = filtered_lambda_functions(app).len();
        app.lambda_state.table.goto_page(page, filtered_count);
    }
}

// ── Filter ────────────────────────────────────────────────────────────────────

pub fn apply_filter_reset(app: &mut App) {
    if app.lambda_state.current_version.is_some() || app.lambda_state.current_function.is_some() {
        app.lambda_state.version_table.reset();
        app.lambda_state.alias_table.reset();
    } else {
        app.lambda_state.table.reset();
    }
}

pub fn start_filter(app: &mut App) {
    if app.lambda_state.current_version.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Configuration
    {
        app.lambda_state.alias_input_focus = InputFocus::Filter;
    } else if app.lambda_state.current_function.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Versions
    {
        app.lambda_state.version_input_focus = InputFocus::Filter;
    } else if app.lambda_state.current_function.is_none() {
        app.lambda_state.input_focus = InputFocus::Filter;
    }
}

pub fn is_pagination_focused(app: &App) -> bool {
    if app.lambda_state.current_function.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Versions
    {
        app.lambda_state.version_input_focus == InputFocus::Pagination
    } else if app.lambda_state.current_function.is_none() {
        app.lambda_state.input_focus == InputFocus::Pagination
    } else {
        false
    }
}

pub fn next_filter_focus(app: &mut App) {
    if app.lambda_state.current_version.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Configuration
    {
        app.lambda_state.alias_input_focus =
            app.lambda_state.alias_input_focus.next(&FILTER_CONTROLS);
    } else if app.lambda_state.current_function.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Versions
    {
        app.lambda_state.version_input_focus =
            app.lambda_state.version_input_focus.next(&FILTER_CONTROLS);
    } else if app.lambda_state.current_function.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Aliases
    {
        app.lambda_state.alias_input_focus =
            app.lambda_state.alias_input_focus.next(&FILTER_CONTROLS);
    } else if app.lambda_state.current_function.is_none() {
        app.lambda_state.input_focus = app.lambda_state.input_focus.next(&FILTER_CONTROLS);
    }
}

pub fn prev_filter_focus(app: &mut App) {
    if app.lambda_state.current_version.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Configuration
    {
        app.lambda_state.alias_input_focus =
            app.lambda_state.alias_input_focus.prev(&FILTER_CONTROLS);
    } else if app.lambda_state.current_function.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Versions
    {
        app.lambda_state.version_input_focus =
            app.lambda_state.version_input_focus.prev(&FILTER_CONTROLS);
    } else if app.lambda_state.current_function.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Aliases
    {
        app.lambda_state.alias_input_focus =
            app.lambda_state.alias_input_focus.prev(&FILTER_CONTROLS);
    } else if app.lambda_state.current_function.is_none() {
        app.lambda_state.input_focus = app.lambda_state.input_focus.prev(&FILTER_CONTROLS);
    }
}

pub fn filter_char_allowed(app: &App) -> bool {
    if app.lambda_state.current_function.is_none() {
        app.lambda_state.input_focus == InputFocus::Filter
    } else if app.lambda_state.current_version.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Configuration
    {
        app.lambda_state.alias_input_focus == InputFocus::Filter
    } else if app.lambda_state.current_function.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Versions
    {
        app.lambda_state.version_input_focus == InputFocus::Filter
    } else if app.lambda_state.current_function.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Aliases
    {
        app.lambda_state.alias_input_focus == InputFocus::Filter
    } else {
        false
    }
}

// ── Actions ───────────────────────────────────────────────────────────────────

pub fn select_item(app: &mut App) {
    if app.lambda_state.current_function.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Versions
    {
        if app.mode == Mode::Normal {
            let page_size = app.lambda_state.version_table.page_size.value();
            let filtered: Vec<_> = app
                .lambda_state
                .version_table
                .items
                .iter()
                .filter(|v| {
                    app.lambda_state.version_table.filter.is_empty()
                        || v.version
                            .to_lowercase()
                            .contains(&app.lambda_state.version_table.filter.to_lowercase())
                        || v.aliases
                            .to_lowercase()
                            .contains(&app.lambda_state.version_table.filter.to_lowercase())
                })
                .collect();
            let current_page = app.lambda_state.version_table.selected / page_size;
            let start_idx = current_page * page_size;
            let end_idx = (start_idx + page_size).min(filtered.len());
            let paginated: Vec<_> = filtered[start_idx..end_idx].to_vec();
            let page_index = app.lambda_state.version_table.selected % page_size;
            if let Some(version) = paginated.get(page_index) {
                app.lambda_state.current_version = Some(version.version.clone());
                app.lambda_state.detail_tab = LambdaDetailTab::Code;
            }
        } else {
            if app.lambda_state.version_table.expanded_item
                == Some(app.lambda_state.version_table.selected)
            {
                app.lambda_state.version_table.collapse();
            } else {
                app.lambda_state.version_table.expanded_item =
                    Some(app.lambda_state.version_table.selected);
            }
        }
    } else if app.lambda_state.current_function.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Aliases
    {
        let filtered: Vec<_> = app
            .lambda_state
            .alias_table
            .items
            .iter()
            .filter(|a| {
                app.lambda_state.alias_table.filter.is_empty()
                    || a.name
                        .to_lowercase()
                        .contains(&app.lambda_state.alias_table.filter.to_lowercase())
                    || a.versions
                        .to_lowercase()
                        .contains(&app.lambda_state.alias_table.filter.to_lowercase())
            })
            .collect();
        if let Some(alias) = app.lambda_state.alias_table.get_selected(&filtered) {
            app.lambda_state.current_alias = Some(alias.name.clone());
        }
    } else if app.lambda_state.current_function.is_none() {
        let filtered = filtered_lambda_functions(app);
        if let Some(func) = app.lambda_state.table.get_selected(&filtered) {
            app.lambda_state.current_function = Some(func.name.clone());
            app.lambda_state.detail_tab = LambdaDetailTab::Code;
            app.update_current_tab_breadcrumb();
        }
    }
}

pub fn go_back(app: &mut App) {
    if app.lambda_state.current_version.is_some() {
        app.lambda_state.current_version = None;
        app.lambda_state.detail_tab = LambdaDetailTab::Versions;
    } else if app.lambda_state.current_alias.is_some() {
        app.lambda_state.current_alias = None;
        app.lambda_state.detail_tab = LambdaDetailTab::Aliases;
    } else if app.lambda_state.current_function.is_some() {
        app.lambda_state.current_function = None;
        app.update_current_tab_breadcrumb();
    }
}

pub fn next_detail_tab(app: &mut App) {
    if app.lambda_state.current_version.is_some() {
        app.lambda_state.version_detail_tab = app.lambda_state.version_detail_tab.next();
        app.lambda_state.detail_tab = app.lambda_state.version_detail_tab.to_detail_tab();
        if app.lambda_state.detail_tab == LambdaDetailTab::Monitor {
            app.lambda_state.set_metrics_loading(true);
            app.lambda_state.set_monitoring_scroll(0);
            app.lambda_state.clear_metrics();
        }
    } else {
        app.lambda_state.detail_tab = app.lambda_state.detail_tab.next();
        if app.lambda_state.detail_tab == LambdaDetailTab::Monitor {
            app.lambda_state.set_metrics_loading(true);
            app.lambda_state.set_monitoring_scroll(0);
            app.lambda_state.clear_metrics();
        }
    }
}

pub fn prev_detail_tab(app: &mut App) {
    if app.lambda_state.current_version.is_some() {
        app.lambda_state.version_detail_tab = app.lambda_state.version_detail_tab.prev();
        app.lambda_state.detail_tab = app.lambda_state.version_detail_tab.to_detail_tab();
        if app.lambda_state.detail_tab == LambdaDetailTab::Monitor {
            app.lambda_state.set_metrics_loading(true);
            app.lambda_state.set_monitoring_scroll(0);
            app.lambda_state.clear_metrics();
        }
    } else {
        app.lambda_state.detail_tab = app.lambda_state.detail_tab.prev();
        if app.lambda_state.detail_tab == LambdaDetailTab::Monitor {
            app.lambda_state.set_metrics_loading(true);
            app.lambda_state.set_monitoring_scroll(0);
            app.lambda_state.clear_metrics();
        }
    }
}

pub fn refresh(app: &mut App) {
    app.lambda_state.table.loading = true;
}

pub fn yank(app: &App) {
    let filtered = filtered_lambda_functions(app);
    if let Some(func) = app.lambda_state.table.get_selected(&filtered) {
        app.clipboard.request_text(&func.arn);
    }
}

// ── Column preferences ────────────────────────────────────────────────────────

pub fn toggle_column(app: &mut App) {
    crate::preferences::bindings::activate_for(app, crate::app::Service::LambdaFunctions);
}

pub fn next_preferences(app: &mut App) {
    crate::preferences::bindings::move_section_for(app, crate::app::Service::LambdaFunctions, true);
}

pub fn prev_preferences(app: &mut App) {
    crate::preferences::bindings::move_section_for(
        app,
        crate::app::Service::LambdaFunctions,
        false,
    );
}

pub fn column_selector_max(app: &App) -> usize {
    crate::preferences::bindings::model_for(app, crate::app::Service::LambdaFunctions).max_index()
}

pub fn column_count(app: &App) -> usize {
    crate::preferences::bindings::model_for(app, crate::app::Service::LambdaFunctions)
        .column_count()
}

// ── Breadcrumb / console URL ──────────────────────────────────────────────────

pub fn breadcrumb(app: &App) -> Vec<String> {
    let mut parts = vec!["Lambda".to_string()];
    if let Some(func) = &app.lambda_state.current_function {
        parts.push(func.clone());
    } else {
        parts.push("Functions".to_string());
    }
    parts
}

pub fn console_url(app: &App) -> String {
    use crate::lambda;
    if let Some(func_name) = &app.lambda_state.current_function {
        if let Some(version) = &app.lambda_state.current_version {
            lambda::console_url_function_version(
                &app.config.region,
                func_name,
                version,
                &app.lambda_state.detail_tab,
            )
        } else {
            lambda::console_url_function_detail(&app.config.region, func_name)
        }
    } else {
        lambda::console_url_functions(&app.config.region)
    }
}

pub fn get_active_filter_mut(app: &mut App) -> Option<&mut String> {
    if app.lambda_state.current_version.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Configuration
    {
        Some(&mut app.lambda_state.alias_table.filter)
    } else if app.lambda_state.current_function.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Versions
    {
        Some(&mut app.lambda_state.version_table.filter)
    } else if app.lambda_state.current_function.is_some()
        && app.lambda_state.detail_tab == LambdaDetailTab::Aliases
    {
        Some(&mut app.lambda_state.alias_table.filter)
    } else {
        Some(&mut app.lambda_state.table.filter)
    }
}

#[cfg(test)]
mod filter_input_regressions {
    use super::*;
    use crate::app::Service;
    use crate::keymap::{handle_key, Action};
    use crate::lambda::Function;
    use crossterm::event::{KeyCode, KeyEvent, KeyModifiers};

    fn press(app: &mut App, code: KeyCode) {
        let action = handle_key(KeyEvent::new(code, KeyModifiers::NONE), app.mode).unwrap();
        app.handle_action(action);
    }

    fn function(name: &str) -> Function {
        Function {
            name: name.into(),
            arn: String::new(),
            application: None,
            description: String::new(),
            package_type: "Zip".into(),
            runtime: String::new(),
            architecture: String::new(),
            code_size: 0,
            code_sha256: String::new(),
            memory_mb: 128,
            timeout_seconds: 30,
            last_modified: String::new(),
            layers: vec![],
        }
    }

    #[test]
    fn lambda_list_filter_accepts_typing_and_backspace_through_keymap() {
        let mut app = App::new_without_client("test".into(), Some("us-east-1".into()));
        app.current_service = Service::LambdaFunctions;
        app.service_selected = true;
        app.mode = Mode::Normal;
        app.lambda_state.table.items = vec![
            function("BETA-GrafanaWorkspace-Provisioner"),
            function("BETA-SagemakerHyperpodEks-FsxDraKmsGrantGrantFnDEE-test"),
        ];
        app.lambda_state.table.selected = 1;
        app.lambda_state.table.scroll_offset = 50;
        app.lambda_state.table.expanded_item = Some(1);
        app.lambda_state.input_focus = InputFocus::Pagination;
        press(&mut app, KeyCode::Char('i'));
        assert_eq!(app.mode, Mode::FilterInput);
        assert_eq!(app.lambda_state.input_focus, InputFocus::Filter);
        for c in "Fsx".chars() {
            press(&mut app, KeyCode::Char(c));
        }
        assert_eq!(app.lambda_state.table.filter, "Fsx");
        assert_eq!(filtered_lambda_functions(&app).len(), 1);
        assert!(filtered_lambda_functions(&app)[0]
            .name
            .contains("FsxDraKmsGrant"));
        assert_eq!(app.lambda_state.table.selected, 0);
        assert_eq!(app.lambda_state.table.scroll_offset, 0);
        assert_eq!(app.lambda_state.table.expanded_item, None);
        press(&mut app, KeyCode::Backspace);
        assert_eq!(app.lambda_state.table.filter, "Fs");
        app.handle_action(Action::DeleteWord);
        assert!(app.lambda_state.table.filter.is_empty());
        assert_eq!(filtered_lambda_functions(&app).len(), 2);
        press(&mut app, KeyCode::Enter);
        assert_eq!(app.mode, Mode::Normal);
    }

    #[test]
    fn lambda_list_pagination_focus_does_not_accept_filter_text() {
        let mut app = App::new_without_client("test".into(), None);
        app.current_service = Service::LambdaFunctions;
        app.service_selected = true;
        app.mode = Mode::Normal;
        press(&mut app, KeyCode::Char('i'));
        press(&mut app, KeyCode::Char('F'));
        press(&mut app, KeyCode::Tab);
        assert_eq!(app.lambda_state.input_focus, InputFocus::Pagination);
        press(&mut app, KeyCode::Char('s'));
        press(&mut app, KeyCode::Char('2'));
        assert_eq!(app.lambda_state.table.filter, "F");
        assert_eq!(app.page_input, "2");
        press(&mut app, KeyCode::BackTab);
        press(&mut app, KeyCode::Char('s'));
        assert_eq!(app.lambda_state.table.filter, "Fs");
    }

    #[test]
    fn lambda_detail_filter_permission_stays_scoped_to_version_and_alias_controls() {
        let mut app = App::new_without_client("test".into(), None);
        app.lambda_state.current_function = Some("fn".into());
        for tab in [LambdaDetailTab::Versions, LambdaDetailTab::Aliases] {
            app.lambda_state.detail_tab = tab;
            app.lambda_state.version_input_focus = InputFocus::Filter;
            app.lambda_state.alias_input_focus = InputFocus::Filter;
            assert!(filter_char_allowed(&app));
            app.lambda_state.version_input_focus = InputFocus::Pagination;
            app.lambda_state.alias_input_focus = InputFocus::Pagination;
            assert!(!filter_char_allowed(&app));
        }
        app.lambda_state.detail_tab = LambdaDetailTab::Code;
        app.lambda_state.input_focus = InputFocus::Filter;
        assert!(!filter_char_allowed(&app));
    }
}