cleansys 0.6.7

use anyhow::Result;
use crossterm::event::{KeyCode, KeyEvent, KeyModifiers};
use crossterm::terminal;
use ratatui::widgets::ListState;
use std::time::Instant;

use crate::components::password_prompt::PasswordPrompt;
use cleansys_core::{check_root, format_size, CleanerCategory, CleanerFn, Status};
use std::time::SystemTime;

#[derive(Debug, Clone)]
pub struct DetailedCleanedItem {
    pub path: String,
    pub size: u64,
    pub category: String,
    pub cleaner_name: String,
    pub timestamp: SystemTime,
    pub item_type: CleanedItemType,
}

#[derive(Debug, Clone, PartialEq)]
pub enum CleanedItemType {
    File,
    Directory,
    Log,
}

impl From<cleansys_core::CleanedItemType> for CleanedItemType {
    fn from(value: cleansys_core::CleanedItemType) -> Self {
        match value {
            cleansys_core::CleanedItemType::File => CleanedItemType::File,
            cleansys_core::CleanedItemType::Directory => CleanedItemType::Directory,
            cleansys_core::CleanedItemType::SymLink => CleanedItemType::File,
        }
    }
}

/// Type alias for pending operations: (category_index, item_index, name, function, requires_root)
pub type PendingOperation = (usize, usize, String, CleanerFn, bool);

#[derive(Debug, Clone, PartialEq)]
pub enum ViewMode {
    Standard,
    Compact,
    Detailed,
    Performance,
}

#[derive(Debug, Clone, PartialEq)]
pub enum SortMode {
    Name,
    Size,
    Status,
    Category,
}

#[derive(Debug, Clone, PartialEq)]
pub enum FilterMode {
    All,
    Selected,
    Completed,
    Errors,
    UserOnly,
    SystemOnly,
}

#[derive(Debug, Clone, PartialEq)]
pub enum ChartType {
    Bar,
    PieCount,
    PieSize,
}

// `Status`, `CleanerItem`, and `CleanerCategory` now live in `cleansys-core`
// so the TUI and GUI front-ends share the exact same domain model.

pub struct App {
    pub categories: Vec<CleanerCategory>,
    pub category_index: usize,
    pub item_list_state: ListState,
    pub is_root: bool,
    pub is_running: bool,
    pub operation_start_time: Option<Instant>,
    pub operation_end_time: Option<Instant>,
    pub total_bytes_cleaned: u64,
    pub show_help: bool,
    pub result_messages: Vec<String>,
    pub detailed_view: bool,
    pub current_cleaner_index: usize,
    pub animation_frame: usize,
    pub last_frame_time: Instant,
    pub terminal_width: u16,
    pub terminal_height: u16,
    pub compact_mode: bool,
    pub show_performance_stats: bool,
    pub operation_count: usize,
    pub errors_count: usize,
    pub paused: bool,
    pub confirmation_mode: bool,
    pub selected_cleaners_count: usize,
    pub view_mode: ViewMode,
    pub sort_mode: SortMode,
    pub filter_mode: FilterMode,
    pub detailed_cleaned_items: Vec<DetailedCleanedItem>,
    pub detailed_list_scroll_state: ListState,
    pub search_query: String,
    pub search_active: bool,
    pub detailed_view_filter: String,
    pub demo_operation_timer: Option<Instant>,
    pub demo_operations_completed: usize,
    pub chart_type: ChartType,
    pub operation_logs: Vec<String>,
    pub show_progress_screen: bool,
    pub password_prompt: PasswordPrompt,
    pub needs_sudo: bool,
    pub pending_operations: Vec<PendingOperation>,
    /// Whether the "confirm this run" overlay is currently shown, awaiting
    /// a yes/no answer before `pending_operations` actually executes.
    pub awaiting_run_confirmation: bool,
    /// Whether the preview (dry-run) results overlay is currently shown.
    pub preview_open: bool,
    /// Results of the most recent preview run: `(cleaner_name, result)`.
    pub preview_results: Vec<(String, cleansys_core::CleaningResult)>,
    /// Whether the "needs Administrator" notice is shown (Windows only;
    /// there is no interactive sudo-password flow there).
    pub needs_admin_notice: bool,
    /// Selected cleaners staged while `awaiting_run_confirmation` is true.
    pub pending_run_selection: Vec<PendingOperation>,
}

impl Default for App {
    fn default() -> Self {
        Self::new()
    }
}

impl App {
    pub fn new() -> Self {
        // Get initial terminal size
        let (width, height) = terminal::size().unwrap_or((80, 24));

        let mut app = App {
            categories: Vec::new(),
            category_index: 0,
            item_list_state: ListState::default(),
            is_root: check_root(),
            is_running: false,
            operation_start_time: None,
            operation_end_time: None,
            total_bytes_cleaned: 0,
            show_help: false,
            result_messages: Vec::new(),
            detailed_view: false,
            current_cleaner_index: 0,
            animation_frame: 0,
            last_frame_time: Instant::now(),
            terminal_width: width,
            terminal_height: height,
            compact_mode: height < 25,
            show_performance_stats: false,
            operation_count: 0,
            errors_count: 0,
            paused: false,
            confirmation_mode: true,
            selected_cleaners_count: 0,
            view_mode: if height < 25 {
                ViewMode::Compact
            } else {
                ViewMode::Standard
            },
            sort_mode: SortMode::Category,
            filter_mode: FilterMode::All,
            detailed_cleaned_items: Vec::new(),
            detailed_list_scroll_state: ListState::default(),
            search_query: String::new(),
            search_active: false,
            detailed_view_filter: String::new(),
            demo_operation_timer: None,
            demo_operations_completed: 0,
            chart_type: ChartType::PieCount,
            operation_logs: Vec::new(),
            show_progress_screen: false,
            password_prompt: PasswordPrompt::new(),
            needs_sudo: false,
            pending_operations: Vec::new(),
            awaiting_run_confirmation: false,
            preview_open: false,
            preview_results: Vec::new(),
            needs_admin_notice: false,
            pending_run_selection: Vec::new(),
        };
        app.item_list_state.select(Some(0));

        app
    }

    pub fn toggle_search(&mut self) {
        self.search_active = !self.search_active;
        if !self.search_active {
            self.search_query.clear();
        }
    }

    pub fn clear_search(&mut self) {
        self.search_active = false;
        self.search_query.clear();
        self.detailed_view_filter.clear();
    }

    pub fn add_search_char(&mut self, c: char) {
        if self.search_active {
            self.search_query.push(c);
        }
    }

    pub fn remove_search_char(&mut self) {
        if self.search_active {
            self.search_query.pop();
        }
    }

    pub fn get_category_distribution(&self) -> Vec<(String, usize, u64)> {
        let mut category_map: std::collections::HashMap<String, (usize, u64)> =
            std::collections::HashMap::new();

        for item in &self.detailed_cleaned_items {
            // Create a unique key that combines cleaner name with category type
            // This differentiates between user and system cleaners with the same name
            let display_name = if item.category.contains("System") {
                format!("{} (System)", item.cleaner_name)
            } else {
                item.cleaner_name.clone()
            };

            let entry = category_map.entry(display_name).or_insert((0, 0));
            entry.0 += 1;
            entry.1 += item.size;
        }

        let mut categories: Vec<(String, usize, u64)> = category_map
            .into_iter()
            .map(|(name, (count, size))| (name, count, size))
            .collect();

        categories.sort_by_key(|b| std::cmp::Reverse(b.2)); // Sort by size descending
        categories
    }

    pub fn next_item(&mut self) {
        let items = &self.categories[self.category_index].items;
        let i = match self.item_list_state.selected() {
            Some(i) => {
                if i >= items.len() - 1 {
                    0
                } else {
                    i + 1
                }
            }
            None => 0,
        };
        self.item_list_state.select(Some(i));
    }

    pub fn previous_item(&mut self) {
        let items = &self.categories[self.category_index].items;
        let i = match self.item_list_state.selected() {
            Some(i) => {
                if i == 0 {
                    items.len() - 1
                } else {
                    i - 1
                }
            }
            None => 0,
        };
        self.item_list_state.select(Some(i));
    }

    pub fn toggle_selected(&mut self) {
        if let Some(i) = self.item_list_state.selected() {
            let item = &mut self.categories[self.category_index].items[i];
            // Allow selection even for root items, will prompt for password later
            item.selected = !item.selected;
        }
    }

    pub fn next_category(&mut self) {
        if self.category_index < self.categories.len() - 1 {
            self.category_index += 1;
        } else {
            self.category_index = 0;
        }
        // Reset selection in new category
        self.item_list_state.select(Some(0));
    }

    pub fn previous_category(&mut self) {
        if self.category_index > 0 {
            self.category_index -= 1;
        } else {
            self.category_index = self.categories.len() - 1;
        }
        // Reset selection in new category
        self.item_list_state.select(Some(0));
    }

    pub fn toggle_help(&mut self) {
        self.show_help = !self.show_help;
    }

    pub fn select_all(&mut self) {
        for item in &mut self.categories[self.category_index].items {
            // Allow selection of all items, will handle root permissions later
            item.selected = true;
        }
    }

    pub fn deselect_all(&mut self) {
        for item in &mut self.categories[self.category_index].items {
            item.selected = false;
        }
    }

    /// Select every item across every category (not just the active tab).
    pub fn select_all_everywhere(&mut self) {
        for category in &mut self.categories {
            for item in &mut category.items {
                item.selected = true;
            }
        }
    }

    /// Deselect every item across every category (not just the active tab).
    pub fn deselect_all_everywhere(&mut self) {
        for category in &mut self.categories {
            for item in &mut category.items {
                item.selected = false;
            }
        }
    }

    /// Gather selected cleaners and either show the confirmation overlay
    /// (when `confirmation_mode` is on) or start execution immediately.
    pub fn request_run(&mut self) -> Result<()> {
        if self.is_running {
            return Ok(());
        }

        let has_selected = self
            .categories
            .iter()
            .any(|c| c.items.iter().any(|i| i.selected));

        if !has_selected {
            self.result_messages
                .push("No items selected. Please select items to clean.".to_string());
            return Ok(());
        }

        let mut selected_cleaners = Vec::new();
        for (cat_idx, category) in self.categories.iter().enumerate() {
            for (item_idx, item) in category.items.iter().enumerate() {
                if item.selected {
                    let name = item.name.clone();
                    let function = item.function;
                    selected_cleaners.push((cat_idx, item_idx, name, function, item.requires_root));
                }
            }
        }

        if selected_cleaners.is_empty() {
            self.operation_logs
                .push("No cleaners selected. Please select at least one cleaner.".to_string());
            return Ok(());
        }

        if self.confirmation_mode {
            self.pending_run_selection = selected_cleaners;
            self.awaiting_run_confirmation = true;
            Ok(())
        } else {
            self.begin_execution(selected_cleaners)
        }
    }

    /// User confirmed the run in the confirmation overlay.
    pub fn confirm_pending_run(&mut self) -> Result<()> {
        self.awaiting_run_confirmation = false;
        let selected_cleaners = std::mem::take(&mut self.pending_run_selection);
        self.begin_execution(selected_cleaners)
    }

    /// User cancelled the confirmation overlay.
    pub fn cancel_run_confirmation(&mut self) {
        self.awaiting_run_confirmation = false;
        self.pending_run_selection.clear();
    }

    /// Preview (dry-run) every selected cleaner synchronously: measures real
    /// sizes/paths without deleting anything or invoking any mutating
    /// external command, and shows the results in an overlay.
    pub fn run_preview(&mut self) {
        if self.is_running {
            return;
        }

        let selected: Vec<(String, cleansys_core::CleanerFn)> = self
            .categories
            .iter()
            .flat_map(|c| c.items.iter())
            .filter(|i| i.selected)
            .map(|i| (i.name.clone(), i.function))
            .collect();

        if selected.is_empty() {
            self.result_messages
                .push("No items selected. Please select items to preview.".to_string());
            return;
        }

        self.preview_results.clear();
        for (name, function) in selected {
            match function(cleansys_core::RunOptions::preview()) {
                Ok(result) => self.preview_results.push((name, result)),
                Err(e) => self
                    .operation_logs
                    .push(format!("⚠️  Preview failed for {name}: {e}")),
            }
        }
        self.preview_open = true;
    }

    /// Close the preview results overlay.
    pub fn close_preview(&mut self) {
        self.preview_open = false;
        self.preview_results.clear();
    }

    /// Actually kick off execution: reset per-run counters/logs, clear all
    /// items' previous status/bytes_cleaned, and mark the given selection as
    /// `Pending`. Shared by both the direct (already-elevated) path in
    /// [`Self::begin_execution`] and the post-password-authentication path in
    /// [`Self::handle_key`] so the two can never drift out of sync again (a
    /// previous copy-pasted duplicate of this omitted the `item.status =
    /// None` reset and the trailing `update_counters()` call, which could
    /// leave stale status/error counts from a prior run visible after
    /// authenticating via the sudo password prompt).
    fn start_operations(&mut self, selected_cleaners: &[PendingOperation]) {
        self.is_running = true;
        self.show_progress_screen = true;
        self.operation_start_time = Some(Instant::now());
        self.operation_end_time = None;
        self.total_bytes_cleaned = 0;
        self.demo_operation_timer = Some(Instant::now());
        self.demo_operations_completed = 0;
        self.result_messages.clear();
        self.operation_logs.clear();
        self.detailed_cleaned_items.clear(); // Clear previous cleaning results
        self.current_cleaner_index = 0;

        // Reset status and bytes_cleaned for all items to start fresh
        for category in &mut self.categories {
            for item in &mut category.items {
                item.bytes_cleaned = 0;
                item.status = None;
            }
        }

        // Set all selected cleaners to Pending
        for (cat_idx, item_idx, _, _, _) in selected_cleaners {
            self.categories[*cat_idx].items[*item_idx].status = Some(Status::Pending);
        }

        self.update_counters();

        // Operations will be processed by update_demo_operations over time.
        // The is_running flag will be automatically turned off when all
        // operations complete.
    }

    /// Test-only public wrapper around the private [`Self::start_operations`],
    /// so integration tests in `tests/` (a separate crate, which can only
    /// see `pub` items) can drive the exact same post-authentication code
    /// path `handle_key` uses. Only compiled into debug builds.
    #[cfg(debug_assertions)]
    pub fn start_operations_for_tests(&mut self, selected_cleaners: &[PendingOperation]) {
        self.start_operations(selected_cleaners);
    }

    /// Actually start execution of the given selected cleaners: prompts for
    /// elevation if needed (sudo password on Unix, an "Administrator
    /// required" notice on Windows), or starts the run directly.
    fn begin_execution(&mut self, selected_cleaners: Vec<PendingOperation>) -> Result<()> {
        let has_root_operations = selected_cleaners.iter().any(|(_, _, _, _, root)| *root);

        // Check if we need elevation. `is_root` reflects whether the process
        // itself was launched with actual root privileges (e.g. `sudo
        // cleansys`) and never changes at runtime; `password_prompt` tracks
        // whether the user has already authenticated via the in-app sudo
        // dialog this session. Both must be considered here, or a user who
        // already authenticated once would be re-prompted for their
        // password on every subsequent run.
        if has_root_operations && !self.is_root && !self.password_prompt.is_authenticated() {
            self.pending_operations.clone_from(&selected_cleaners);
            if cleansys_core::utils::supports_sudo_prompt() {
                self.needs_sudo = true;
                self.password_prompt.show();
            } else {
                self.needs_admin_notice = true;
            }
            return Ok(());
        }

        self.start_operations(&selected_cleaners);

        Ok(())
    }

    pub fn update_animation(&mut self) {
        let now = Instant::now();
        if now.duration_since(self.last_frame_time).as_millis() > 100 {
            self.animation_frame = (self.animation_frame + 1) % 10;
            self.last_frame_time = now;
        }

        // Update demo operations if running
        if self.is_running {
            self.update_demo_operations();
        }
    }

    pub fn update_demo_operations(&mut self) {
        if let Some(start_time) = self.demo_operation_timer {
            let elapsed = start_time.elapsed().as_millis();

            // Find next pending operation to start
            type Operation = (usize, usize, String, CleanerFn, bool);
            let mut pending_operations: Vec<Operation> = Vec::new();
            for (cat_idx, category) in self.categories.iter().enumerate() {
                for (item_idx, item) in category.items.iter().enumerate() {
                    if matches!(item.status, Some(Status::Pending)) {
                        pending_operations.push((
                            cat_idx,
                            item_idx,
                            item.name.to_string(),
                            item.function,
                            item.requires_root,
                        ));
                    }
                }
            }

            // Start next operation every 1.5 seconds (paced so the progress
            // screen shows operations completing one at a time rather than
            // all at once, even though each one runs synchronously).
            let operations_to_start = (elapsed / 1500) as usize;
            if operations_to_start > self.demo_operations_completed
                && !pending_operations.is_empty()
            {
                if let Some((cat_idx, item_idx, _name, _function, _requires_root)) =
                    pending_operations.first()
                {
                    // Set to running
                    self.categories[*cat_idx].items[*item_idx].status = Some(Status::Running);
                    self.demo_operations_completed += 1;
                }
            }

            // Complete running operations after 2 seconds
            let mut running_operations: Vec<Operation> = Vec::new();
            for (cat_idx, category) in self.categories.iter().enumerate() {
                for (item_idx, item) in category.items.iter().enumerate() {
                    if matches!(item.status, Some(Status::Running)) {
                        running_operations.push((
                            cat_idx,
                            item_idx,
                            item.name.to_string(),
                            item.function,
                            item.requires_root,
                        ));
                    }
                }
            }

            // Complete operations that have been running for at least 2 seconds
            for (cat_idx, item_idx, name, function, requires_root) in running_operations {
                self.operation_logs.push(format!("Starting: {}", name));

                // Check if operation requires root and we don't have it
                let result: anyhow::Result<cleansys_core::CleaningResult> =
                    if requires_root && !self.is_root && !self.password_prompt.is_authenticated() {
                        // Show password prompt and pause operations
                        self.needs_sudo = true;
                        self.password_prompt.show();
                        self.is_running = false;
                        self.operation_logs
                            .push(format!("🔒 {}: Waiting for sudo authentication...", name));
                        // Return error to mark this operation as pending
                        Err(anyhow::anyhow!("Waiting for sudo authentication"))
                    } else {
                        self.operation_logs.push(format!("🔄 Executing: {}", name));
                        function(cleansys_core::RunOptions::execute())
                    };

                // Process result
                match result {
                    Ok(cleaning_result) => {
                        let bytes = cleaning_result.total_bytes;
                        let msg = if requires_root {
                            format!(
                                "Cleaned {} (root) ({}, {} item(s))",
                                name,
                                format_size(bytes),
                                cleaning_result.item_count()
                            )
                        } else {
                            format!(
                                "Cleaned {} ({}, {} item(s))",
                                name,
                                format_size(bytes),
                                cleaning_result.item_count()
                            )
                        };
                        self.categories[cat_idx].items[item_idx].status =
                            Some(Status::Success(msg));
                        self.categories[cat_idx].items[item_idx].bytes_cleaned = bytes;
                        self.total_bytes_cleaned += bytes;
                        self.operation_logs.push(format!(
                            "✅ Completed {}: {} freed across {} item(s)",
                            name,
                            format_size(bytes),
                            cleaning_result.item_count()
                        ));

                        // Record real per-item detail (path + size) for the detailed view.
                        let category_name = self.categories[cat_idx].name.clone();
                        for item in &cleaning_result.items {
                            self.operation_logs.push(format!(
                                "  → {} ({})",
                                item.path_str(),
                                format_size(item.size)
                            ));
                            self.add_detailed_cleaned_item(
                                item.path_str(),
                                item.size,
                                category_name.clone(),
                                name.clone(),
                                item.item_type.clone().into(),
                            );
                        }
                        self.categories[cat_idx].items[item_idx].last_result =
                            Some(cleaning_result);

                        if bytes == 0 {
                            self.operation_logs.push(format!(
                                "ℹ️  {}: nothing to clean (already empty on {})",
                                name,
                                cleansys_core::cleaners::platform::platform_name()
                            ));
                        }
                    }
                    Err(e) => {
                        let error_msg = if requires_root && !self.is_root {
                            "Requires sudo - restart with 'sudo cleansys'".to_string()
                        } else {
                            format!(
                                "Failed: {}",
                                e.to_string()
                                    .split(':')
                                    .next_back()
                                    .unwrap_or("Unknown error")
                                    .trim()
                            )
                        };
                        self.categories[cat_idx].items[item_idx].status =
                            Some(Status::Error(error_msg.clone()));
                        self.operation_logs
                            .push(format!("❌ Failed {}: {}", name, error_msg));

                        // Add helpful message for sudo requirement
                        if requires_root
                            && !self.is_root
                            && !self
                                .result_messages
                                .iter()
                                .any(|msg| msg.contains("sudo cleansys"))
                        {
                            self.result_messages.push(
                                "💡 System cleaners require root privileges. Run 'sudo cleansys' to clean system files.".to_string()
                            );
                        }
                    }
                }
            }
        }
    }

    pub fn cancel_sudo_operations(&mut self) {
        // Mark all operations as cancelled
        for category in &mut self.categories {
            for item in &mut category.items {
                if item.selected && matches!(item.status, Some(Status::Running | Status::Pending)) {
                    item.status = Some(Status::Error("Operation cancelled by user".to_string()));
                    item.selected = false; // Deselect the item
                }
            }
        }

        self.result_messages
            .push("Cleaning operations cancelled by user.".to_string());
    }

    pub fn handle_key(&mut self, key: KeyEvent) -> Result<bool> {
        // If password prompt is visible, handle password input first
        if self.password_prompt.is_visible() {
            match key.code {
                KeyCode::Enter => {
                    // Submit password and authenticate
                    match self.password_prompt.submit() {
                        Ok(true) => {
                            // Authentication successful, proceed with operations
                            self.needs_sudo = false;
                            self.password_prompt.hide();

                            // Now start the actual cleaning operations
                            let selected_cleaners = self.pending_operations.clone();
                            self.pending_operations.clear();

                            if !selected_cleaners.is_empty() {
                                self.start_operations(&selected_cleaners);
                            }
                        }
                        Ok(false) => {
                            // Authentication failed, stay on prompt
                        }
                        Err(e) => {
                            self.operation_logs
                                .push(format!("❌ Authentication error: {}", e));
                            self.password_prompt.hide();
                            self.needs_sudo = false;
                            self.pending_operations.clear();
                        }
                    }
                }
                KeyCode::Esc => {
                    // Cancel password prompt
                    self.password_prompt.cancel();
                    self.needs_sudo = false;
                    self.pending_operations.clear();
                }
                KeyCode::Char(c) => {
                    self.password_prompt.add_char(c);
                }
                KeyCode::Backspace => {
                    self.password_prompt.remove_char();
                }
                _ => {}
            }
            return Ok(false);
        }

        // "Needs Administrator" notice (Windows only — no interactive sudo flow there)
        if self.needs_admin_notice {
            match key.code {
                KeyCode::Esc | KeyCode::Enter | KeyCode::Char('q') => {
                    self.needs_admin_notice = false;
                    self.pending_operations.clear();
                }
                _ => {}
            }
            return Ok(false);
        }

        // Run confirmation overlay
        if self.awaiting_run_confirmation {
            match key.code {
                KeyCode::Enter | KeyCode::Char('y') => {
                    self.confirm_pending_run()?;
                }
                KeyCode::Esc | KeyCode::Char('n') => {
                    self.cancel_run_confirmation();
                }
                _ => {}
            }
            return Ok(false);
        }

        // Preview results overlay
        if self.preview_open {
            match key.code {
                KeyCode::Esc | KeyCode::Enter | KeyCode::Char('q') => {
                    self.close_preview();
                }
                _ => {}
            }
            return Ok(false);
        }

        match (key.code, key.modifiers) {
            // Quit
            (KeyCode::Char('q'), _) => {
                if self.show_help {
                    self.show_help = false;
                } else if self.is_running {
                    // Cancel current cleaning operations
                    self.is_running = false;
                    self.cancel_sudo_operations();
                } else {
                    return Ok(true);
                }
            }

            // Navigation
            (KeyCode::Down, _) => {
                if !self.show_help {
                    if self.is_running || self.show_progress_screen {
                        self.scroll_detailed_list_down();
                    } else {
                        self.next_item();
                    }
                }
            }
            (KeyCode::Up, _) => {
                if !self.show_help {
                    if self.is_running || self.show_progress_screen {
                        self.scroll_detailed_list_up();
                    } else {
                        self.previous_item();
                    }
                }
            }
            (KeyCode::Tab, _) => {
                if !self.show_help {
                    self.next_category();
                }
            }
            (KeyCode::BackTab, _) => {
                if !self.show_help {
                    self.previous_category();
                }
            }
            // Selection
            (KeyCode::Char(' '), KeyModifiers::NONE) => {
                if !self.show_help {
                    self.toggle_selected();
                }
            }
            // Run cleaners (shows a confirmation overlay first, unless
            // confirmation prompts are disabled via 'y').
            (KeyCode::Enter, _) => {
                if !self.show_help {
                    self.request_run()?;
                }
            }
            // Preview (dry-run) selected cleaners — measures real sizes/paths
            // without deleting anything.
            (KeyCode::Char('d'), _) => {
                if !self.show_help && !self.is_running {
                    self.run_preview();
                }
            }
            // Help dialog
            (KeyCode::Char('?' | 'h'), _) => {
                self.toggle_help();
            }

            // Toggle search in removed items view
            (KeyCode::Char('/'), _) => {
                if !self.show_help {
                    self.toggle_search();
                }
            }
            // Clear search or cancel operations or return to main menu
            (KeyCode::Esc, _) => {
                if self.search_active {
                    self.clear_search();
                } else if self.is_running {
                    self.is_running = false;
                    self.cancel_sudo_operations();
                } else if self.show_progress_screen {
                    // Return to main menu from completed operations screen
                    self.show_progress_screen = false;
                }
            }
            // Scroll removed items list
            (KeyCode::Char('j'), _) => {
                if !self.show_help {
                    self.scroll_detailed_list_down();
                }
            }
            (KeyCode::Char('k'), _) => {
                if !self.show_help {
                    self.scroll_detailed_list_up();
                }
            }
            // Select all in current category
            (KeyCode::Char('a'), _) => {
                if !self.show_help {
                    self.select_all();
                }
            }
            // Deselect all in current category
            (KeyCode::Char('n'), _) => {
                if !self.show_help {
                    self.deselect_all();
                }
            }
            // Select all across every category
            (KeyCode::Char('A'), _) => {
                if !self.show_help {
                    self.select_all_everywhere();
                }
            }
            // Deselect all across every category
            (KeyCode::Char('N'), _) => {
                if !self.show_help {
                    self.deselect_all_everywhere();
                }
            }

            // Toggle compact mode
            (KeyCode::Char('m'), _) => {
                if !self.show_help {
                    self.toggle_compact_mode();
                }
            }
            // Toggle auto scroll log
            (KeyCode::Char('s'), _) => {
                if !self.show_help && self.is_running {
                    self.toggle_auto_scroll();
                }
            }
            // Toggle performance stats
            (KeyCode::Char('p'), _) => {
                if !self.show_help {
                    self.toggle_performance_stats();
                }
            }
            // Cycle view mode
            (KeyCode::Char('v'), _) => {
                if !self.show_help {
                    self.cycle_view_mode();
                }
            }
            // Cycle sort mode
            (KeyCode::Char('o'), _) => {
                if !self.show_help {
                    self.cycle_sort_mode();
                }
            }
            // Cycle filter mode
            (KeyCode::Char('f'), _) => {
                if !self.show_help {
                    self.cycle_filter_mode();
                }
            }
            // Toggle pause/resume operations
            (KeyCode::Char(' '), KeyModifiers::CONTROL) => {
                if self.is_running {
                    self.toggle_pause();
                }
            }
            // Toggle confirmation mode
            (KeyCode::Char('y'), _) => {
                if !self.show_help {
                    self.toggle_confirmation_mode();
                }
            }
            // Toggle chart type
            (KeyCode::Char('c'), _) => {
                if !self.show_help {
                    self.toggle_chart_type();
                }
            }
            // Clear all errors
            (KeyCode::Char('x'), _) => {
                if !self.show_help {
                    self.clear_errors();
                }
            }
            // Handle search input (only when search is active)
            (KeyCode::Char(c), _) => {
                if self.search_active {
                    self.add_search_char(c);
                } else if !self.show_help {
                    self.toggle_selected();
                }
            }
            // Backspace in search
            (KeyCode::Backspace, _) => {
                if self.search_active {
                    self.remove_search_char();
                }
            }
            // Page scrolling for removed items (when in progress view)
            (KeyCode::PageUp, _) => {
                if self.is_running || self.show_progress_screen {
                    // Scroll up by 10 items
                    for _ in 0..10 {
                        self.scroll_detailed_list_up();
                    }
                }
            }
            (KeyCode::PageDown, _) => {
                if self.is_running || self.show_progress_screen {
                    // Scroll down by 10 items
                    for _ in 0..10 {
                        self.scroll_detailed_list_down();
                    }
                }
            }
            // Enhanced navigation with Ctrl modifiers
            (KeyCode::Home, _) => {
                if !self.show_help {
                    if self.is_running || self.show_progress_screen {
                        self.detailed_list_scroll_state.select(Some(0));
                    } else {
                        self.item_list_state.select(Some(0));
                    }
                }
            }
            (KeyCode::End, _) if !self.show_help => {
                if self.is_running || self.show_progress_screen {
                    if !self.detailed_cleaned_items.is_empty() {
                        let last_index = (self.detailed_cleaned_items.len() * 3).saturating_sub(1);
                        self.detailed_list_scroll_state.select(Some(last_index));
                    }
                } else {
                    let len = self.categories[self.category_index].items.len();
                    if len > 0 {
                        self.item_list_state.select(Some(len - 1));
                    }
                }
            }
            _ => {}
        }

        Ok(false)
    }

    pub fn handle_resize(&mut self, width: u16, height: u16) {
        self.terminal_width = width;
        self.terminal_height = height;
    }

    pub fn toggle_compact_mode(&mut self) {
        self.compact_mode = !self.compact_mode;
        self.view_mode = if self.compact_mode {
            ViewMode::Compact
        } else {
            ViewMode::Standard
        };
    }

    pub fn toggle_auto_scroll(&mut self) {
        // Auto scroll functionality for operation logs
    }

    pub fn toggle_performance_stats(&mut self) {
        self.show_performance_stats = !self.show_performance_stats;
    }

    pub fn cycle_view_mode(&mut self) {
        self.view_mode = match self.view_mode {
            ViewMode::Standard => ViewMode::Compact,
            ViewMode::Compact => ViewMode::Detailed,
            ViewMode::Detailed => ViewMode::Performance,
            ViewMode::Performance => ViewMode::Standard,
        };
    }

    pub fn cycle_sort_mode(&mut self) {
        self.sort_mode = match self.sort_mode {
            SortMode::Name => SortMode::Size,
            SortMode::Size => SortMode::Status,
            SortMode::Status => SortMode::Category,
            SortMode::Category => SortMode::Name,
        };
    }

    pub fn cycle_filter_mode(&mut self) {
        self.filter_mode = match self.filter_mode {
            FilterMode::All => FilterMode::Selected,
            FilterMode::Selected => FilterMode::Completed,
            FilterMode::Completed => FilterMode::Errors,
            FilterMode::Errors => FilterMode::UserOnly,
            FilterMode::UserOnly => FilterMode::SystemOnly,
            FilterMode::SystemOnly => FilterMode::All,
        };
    }

    pub fn toggle_pause(&mut self) {
        self.paused = !self.paused;
    }

    pub fn toggle_confirmation_mode(&mut self) {
        self.confirmation_mode = !self.confirmation_mode;
    }

    pub fn update_counters(&mut self) {
        self.selected_cleaners_count = self
            .categories
            .iter()
            .flat_map(|cat| &cat.items)
            .filter(|item| item.selected)
            .count();

        self.errors_count = self
            .categories
            .iter()
            .flat_map(|cat| &cat.items)
            .filter(|item| matches!(item.status, Some(Status::Error(_))))
            .count();

        self.operation_count = self
            .categories
            .iter()
            .flat_map(|cat| &cat.items)
            .filter(|item| item.status.is_some())
            .count();

        // Auto-complete when all operations are finished
        if self.is_running && self.operation_count > 0 {
            let running_count = self
                .categories
                .iter()
                .flat_map(|cat| &cat.items)
                .filter(|item| matches!(item.status, Some(Status::Running)))
                .count();

            let pending_count = self
                .categories
                .iter()
                .flat_map(|cat| &cat.items)
                .filter(|item| matches!(item.status, Some(Status::Pending)))
                .count();

            let selected_count = self
                .categories
                .iter()
                .flat_map(|cat| &cat.items)
                .filter(|item| item.selected)
                .count();

            // If no operations are running or pending, and we have selected items, mark as complete
            if running_count == 0 && pending_count == 0 && selected_count > 0 {
                self.is_running = false;
                self.demo_operation_timer = None;
                self.operation_end_time = Some(Instant::now());

                // Add completion message
                if !self
                    .result_messages
                    .iter()
                    .any(|msg| msg.contains("Completed"))
                {
                    let summary = format!(
                        "Cleaning completed! Total space freed: {}",
                        format_size(self.total_bytes_cleaned)
                    );
                    self.result_messages
                        .push(format!("✅ {summary} (Press ESC to return to main menu)"));
                    crate::notifications::notify_completion(&summary);
                }
                // Keep show_progress_screen true so user stays on details screen
            }
        }
    }

    pub fn clear_errors(&mut self) {
        for category in &mut self.categories {
            for item in &mut category.items {
                if matches!(item.status, Some(Status::Error(_))) {
                    item.status = None;
                }
            }
        }
        self.errors_count = 0;
    }

    pub fn get_elapsed_time(&self) -> String {
        if let Some(start_time) = self.operation_start_time {
            let elapsed = if let Some(end_time) = self.operation_end_time {
                // Operation completed, show total time
                end_time.duration_since(start_time)
            } else {
                // Operation still running, show current elapsed time
                start_time.elapsed()
            };

            if elapsed.as_secs() < 60 {
                format!("{}s", elapsed.as_secs())
            } else {
                format!("{}m {}s", elapsed.as_secs() / 60, elapsed.as_secs() % 60)
            }
        } else {
            "0s".to_string()
        }
    }

    pub fn add_detailed_cleaned_item(
        &mut self,
        path: String,
        size: u64,
        category: String,
        cleaner_name: String,
        item_type: CleanedItemType,
    ) {
        let item = DetailedCleanedItem {
            path,
            size,
            category,
            cleaner_name,
            timestamp: SystemTime::now(),
            item_type,
        };
        self.detailed_cleaned_items.push(item);

        // Keep only last 1000 items to prevent memory issues
        if self.detailed_cleaned_items.len() > 1000 {
            self.detailed_cleaned_items.remove(0);
        }
    }

    pub fn scroll_detailed_list_up(&mut self) {
        if let Some(selected) = self.detailed_list_scroll_state.selected() {
            if selected > 0 {
                self.detailed_list_scroll_state.select(Some(selected - 1));
            }
        } else {
            // Start from the bottom when first navigating
            let total_items = if !self.detailed_cleaned_items.is_empty() {
                self.detailed_cleaned_items.len() * 3 // Account for spacing between items
            } else {
                45 // Sample items count for demo
            };
            if total_items > 0 {
                self.detailed_list_scroll_state
                    .select(Some(total_items - 1));
            }
        }
    }

    pub fn scroll_detailed_list_down(&mut self) {
        let total_items = if !self.detailed_cleaned_items.is_empty() {
            self.detailed_cleaned_items.len() * 3 // Account for spacing between items
        } else {
            45 // Sample items count for demo
        };

        if let Some(selected) = self.detailed_list_scroll_state.selected() {
            if selected < total_items.saturating_sub(1) {
                self.detailed_list_scroll_state.select(Some(selected + 1));
            }
        } else if total_items > 0 {
            self.detailed_list_scroll_state.select(Some(0));
        }
    }

    pub fn get_filtered_detailed_items(&self) -> Vec<&DetailedCleanedItem> {
        let mut items: Vec<&DetailedCleanedItem> = self
            .detailed_cleaned_items
            .iter()
            .filter(|item| {
                // Apply search filter
                if !self.search_query.is_empty() {
                    let query_lower = self.search_query.to_lowercase();
                    return item.path.to_lowercase().contains(&query_lower)
                        || item.category.to_lowercase().contains(&query_lower)
                        || item.cleaner_name.to_lowercase().contains(&query_lower);
                }

                // Apply category filter
                if !self.detailed_view_filter.is_empty() {
                    return item
                        .category
                        .to_lowercase()
                        .contains(&self.detailed_view_filter.to_lowercase());
                }

                true
            })
            .collect();

        // Sort based on current sort mode
        match self.sort_mode {
            SortMode::Name => items.sort_by(|a, b| a.path.cmp(&b.path)),
            SortMode::Size => items.sort_by_key(|b| std::cmp::Reverse(b.size)), // Largest first
            SortMode::Category => items.sort_by(|a, b| a.category.cmp(&b.category)),
            SortMode::Status => items.sort_by_key(|b| std::cmp::Reverse(b.timestamp)), // Most recent first
        }

        items
    }

    pub fn toggle_chart_type(&mut self) {
        self.chart_type = match self.chart_type {
            ChartType::Bar => ChartType::PieCount,
            ChartType::PieCount => ChartType::PieSize,
            ChartType::PieSize => ChartType::Bar,
        };
    }
}