use crossterm::{
    event::{self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode, KeyEventKind},
    execute,
    terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
};
use ratatui::{
    backend::{Backend, CrosstermBackend},
    layout::{Alignment, Constraint, Direction, Layout, Rect},
    style::{Color, Modifier, Style},
    text::{Line, Span},
    widgets::{
        Block, Borders, Cell, Clear, List, ListItem, ListState, Paragraph, Row, Table, TableState,
        Tabs, Wrap,
    },
    Frame, Terminal,
};
use std::{
    io,
    time::{Duration, Instant},
};
use tokio::sync::mpsc;

use crate::config::{AppConfig, KeybindMode};
use yarr_api::{
    Episode, HealthResource, HistoryItem, QueueItem, ReleaseResource, Series, SonarrClient,
    SystemStatus,
};

#[derive(Debug)]
pub enum AppEvent {
    Tick,
    Key(crossterm::event::KeyEvent),
    Error(String),
    SeriesLoaded(Vec<Series>),
    #[allow(dead_code)]
    EpisodesLoaded(Vec<Episode>),
    QueueLoaded(Vec<QueueItem>),
    HistoryLoaded(Vec<HistoryItem>),
    SystemStatusLoaded(SystemStatus),
    HealthLoaded(Vec<HealthResource>),
    CalendarLoaded(Vec<Episode>),
    SearchResults(Vec<Series>),
    ReleasesLoaded(Vec<ReleaseResource>),
    ReleaseDownloaded(String),
}

#[derive(Debug, Clone, Copy, PartialEq)]
pub enum TabIndex {
    Series,
    Search,
    Calendar,
    Queue,
    History,
    Health,
    Settings,
}

impl TabIndex {
    fn titles() -> Vec<&'static str> {
        vec![
            "Series", "Search", "Calendar", "Queue", "History", "Health", "Settings",
        ]
    }

    fn from_index(index: usize) -> Self {
        match index {
            0 => TabIndex::Series,
            1 => TabIndex::Search,
            2 => TabIndex::Calendar,
            3 => TabIndex::Queue,
            4 => TabIndex::History,
            5 => TabIndex::Health,
            6 => TabIndex::Settings,
            _ => TabIndex::Series,
        }
    }

    fn to_index(&self) -> usize {
        match self {
            TabIndex::Series => 0,
            TabIndex::Search => 1,
            TabIndex::Calendar => 2,
            TabIndex::Queue => 3,
            TabIndex::History => 4,
            TabIndex::Health => 5,
            TabIndex::Settings => 6,
        }
    }
}

pub struct App {
    pub should_quit: bool,
    pub current_tab: TabIndex,
    pub series_list_state: ListState,
    pub episodes_list_state: ListState,
    pub queue_table_state: TableState,
    pub history_table_state: TableState,
    pub health_list_state: ListState,
    pub search_list_state: ListState,
    pub settings_list_state: ListState,
    pub releases_list_state: ListState,
    pub series: Vec<Series>,
    pub episodes: Vec<Episode>,
    pub queue: Vec<QueueItem>,
    pub history: Vec<HistoryItem>,
    pub health: Vec<HealthResource>,
    pub calendar: Vec<Episode>,
    pub system_status: Option<SystemStatus>,
    #[allow(dead_code)]
    pub selected_series: Option<Series>,
    pub loading: bool,
    pub error_message: Option<String>,
    pub search_input: String,
    pub search_results: Vec<Series>,
    pub search_mode: bool,
    pub show_details: bool,
    pub input_mode: bool,
    pub config: AppConfig,
    pub config_changed: bool,
    pub editing_url: bool,
    pub editing_api_key: bool,
    pub url_input: String,
    pub api_key_input: String,
    pub show_releases_popup: bool,
    pub releases: Vec<ReleaseResource>,
    pub selected_search_series: Option<Series>,
    pub loading_releases: bool,
}

impl Default for App {
    fn default() -> Self {
        let mut app = Self {
            should_quit: false,
            current_tab: TabIndex::Series,
            series_list_state: ListState::default(),
            episodes_list_state: ListState::default(),
            queue_table_state: TableState::default(),
            history_table_state: TableState::default(),
            health_list_state: ListState::default(),
            search_list_state: ListState::default(),
            settings_list_state: ListState::default(),
            releases_list_state: ListState::default(),
            series: Vec::new(),
            episodes: Vec::new(),
            queue: Vec::new(),
            history: Vec::new(),
            health: Vec::new(),
            calendar: Vec::new(),
            system_status: None,
            selected_series: None,
            loading: false,
            error_message: None,
            search_input: String::new(),
            search_results: Vec::new(),
            search_mode: false,
            show_details: false,
            input_mode: false,
            config: AppConfig::default(),
            config_changed: false,
            editing_url: false,
            editing_api_key: false,
            url_input: String::new(),
            api_key_input: String::new(),
            show_releases_popup: false,
            releases: Vec::new(),
            selected_search_series: None,
            loading_releases: false,
        };
        app.series_list_state.select(Some(0));
        app.settings_list_state.select(Some(0));
        app.releases_list_state.select(Some(0));
        app
    }
}

impl App {
    pub fn next_tab(&mut self) {
        let current_index = self.current_tab.to_index();
        let next_index = (current_index + 1) % TabIndex::titles().len();
        self.current_tab = TabIndex::from_index(next_index);
    }

    pub fn previous_tab(&mut self) {
        let current_index = self.current_tab.to_index();
        let prev_index = if current_index == 0 {
            TabIndex::titles().len() - 1
        } else {
            current_index - 1
        };
        self.current_tab = TabIndex::from_index(prev_index);
    }

    pub fn next_item(&mut self) {
        if self.show_releases_popup {
            self.next_release();
            return;
        }

        match self.current_tab {
            TabIndex::Series => {
                let len = self.series.len();
                if len > 0 {
                    let i = match self.series_list_state.selected() {
                        Some(i) => (i + 1) % len,
                        None => 0,
                    };
                    self.series_list_state.select(Some(i));
                }
            }
            TabIndex::Calendar => {
                let len = self.calendar.len();
                if len > 0 {
                    let i = match self.episodes_list_state.selected() {
                        Some(i) => (i + 1) % len,
                        None => 0,
                    };
                    self.episodes_list_state.select(Some(i));
                }
            }
            TabIndex::Queue => {
                let len = self.queue.len();
                if len > 0 {
                    let i = match self.queue_table_state.selected() {
                        Some(i) => (i + 1) % len,
                        None => 0,
                    };
                    self.queue_table_state.select(Some(i));
                }
            }
            TabIndex::History => {
                let len = self.history.len();
                if len > 0 {
                    let i = match self.history_table_state.selected() {
                        Some(i) => (i + 1) % len,
                        None => 0,
                    };
                    self.history_table_state.select(Some(i));
                }
            }
            TabIndex::Health => {
                let len = self.health.len();
                if len > 0 {
                    let i = match self.health_list_state.selected() {
                        Some(i) => (i + 1) % len,
                        None => 0,
                    };
                    self.health_list_state.select(Some(i));
                }
            }
            TabIndex::Search => {
                let len = self.search_results.len();
                if len > 0 {
                    let i = match self.search_list_state.selected() {
                        Some(i) => (i + 1) % len,
                        None => 0,
                    };
                    self.search_list_state.select(Some(i));
                }
            }
            TabIndex::Settings => {
                self.next_settings_item();
            }
        }
    }

    pub fn previous_item(&mut self) {
        if self.show_releases_popup {
            self.previous_release();
            return;
        }

        match self.current_tab {
            TabIndex::Series => {
                let len = self.series.len();
                if len > 0 {
                    let i = match self.series_list_state.selected() {
                        Some(i) => {
                            if i == 0 {
                                len - 1
                            } else {
                                i - 1
                            }
                        }
                        None => 0,
                    };
                    self.series_list_state.select(Some(i));
                }
            }
            TabIndex::Calendar => {
                let len = self.calendar.len();
                if len > 0 {
                    let i = match self.episodes_list_state.selected() {
                        Some(i) => {
                            if i == 0 {
                                len - 1
                            } else {
                                i - 1
                            }
                        }
                        None => 0,
                    };
                    self.episodes_list_state.select(Some(i));
                }
            }
            TabIndex::Queue => {
                let len = self.queue.len();
                if len > 0 {
                    let i = match self.queue_table_state.selected() {
                        Some(i) => {
                            if i == 0 {
                                len - 1
                            } else {
                                i - 1
                            }
                        }
                        None => 0,
                    };
                    self.queue_table_state.select(Some(i));
                }
            }
            TabIndex::History => {
                let len = self.history.len();
                if len > 0 {
                    let i = match self.history_table_state.selected() {
                        Some(i) => {
                            if i == 0 {
                                len - 1
                            } else {
                                i - 1
                            }
                        }
                        None => 0,
                    };
                    self.history_table_state.select(Some(i));
                }
            }
            TabIndex::Health => {
                let len = self.health.len();
                if len > 0 {
                    let i = match self.health_list_state.selected() {
                        Some(i) => {
                            if i == 0 {
                                len - 1
                            } else {
                                i - 1
                            }
                        }
                        None => 0,
                    };
                    self.health_list_state.select(Some(i));
                }
            }
            TabIndex::Search => {
                let len = self.search_results.len();
                if len > 0 {
                    let i = match self.search_list_state.selected() {
                        Some(i) => {
                            if i == 0 {
                                len - 1
                            } else {
                                i - 1
                            }
                        }
                        None => 0,
                    };
                    self.search_list_state.select(Some(i));
                }
            }
            TabIndex::Settings => {
                self.previous_settings_item();
            }
        }
    }

    #[allow(dead_code)]
    pub fn get_selected_series(&self) -> Option<&Series> {
        if let Some(index) = self.series_list_state.selected() {
            self.series.get(index)
        } else {
            None
        }
    }

    #[allow(dead_code)]
    pub fn get_selected_search_result(&self) -> Option<&Series> {
        if let Some(index) = self.search_list_state.selected() {
            self.search_results.get(index)
        } else {
            None
        }
    }

    pub fn get_selected_release(&self) -> Option<&ReleaseResource> {
        if let Some(index) = self.releases_list_state.selected() {
            self.releases.get(index)
        } else {
            None
        }
    }

    pub fn show_releases_popup(&mut self, series: Series) {
        self.show_releases_popup = true;
        self.selected_search_series = Some(series);
        self.releases.clear();
        self.releases_list_state.select(Some(0));
        self.loading_releases = true;
    }

    pub fn hide_releases_popup(&mut self) {
        self.show_releases_popup = false;
        self.selected_search_series = None;
        self.releases.clear();
        self.loading_releases = false;
    }

    pub fn next_release(&mut self) {
        if !self.releases.is_empty() {
            let i = match self.releases_list_state.selected() {
                Some(i) => (i + 1) % self.releases.len(),
                None => 0,
            };
            self.releases_list_state.select(Some(i));
        }
    }

    pub fn previous_release(&mut self) {
        if !self.releases.is_empty() {
            let i = match self.releases_list_state.selected() {
                Some(i) => {
                    if i == 0 {
                        self.releases.len() - 1
                    } else {
                        i - 1
                    }
                }
                None => 0,
            };
            self.releases_list_state.select(Some(i));
        }
    }

    pub fn enter_search_mode(&mut self) {
        self.search_mode = true;
        self.input_mode = true;
        self.search_input.clear();
        self.search_results.clear();
        self.search_list_state.select(None);
    }

    pub fn exit_search_mode(&mut self) {
        self.search_mode = false;
        self.input_mode = false;
        self.search_input.clear();
        self.search_results.clear();
    }

    pub fn toggle_details(&mut self) {
        self.show_details = !self.show_details;
    }

    pub fn clear_error(&mut self) {
        self.error_message = None;
    }

    pub fn set_error(&mut self, error: String) {
        self.error_message = Some(error);
    }

    pub fn go_to_first(&mut self) {
        match self.current_tab {
            TabIndex::Series => {
                if !self.series.is_empty() {
                    self.series_list_state.select(Some(0));
                }
            }
            TabIndex::Calendar => {
                if !self.calendar.is_empty() {
                    self.episodes_list_state.select(Some(0));
                }
            }
            TabIndex::Queue => {
                if !self.queue.is_empty() {
                    self.queue_table_state.select(Some(0));
                }
            }
            TabIndex::History => {
                if !self.history.is_empty() {
                    self.history_table_state.select(Some(0));
                }
            }
            TabIndex::Health => {
                if !self.health.is_empty() {
                    self.health_list_state.select(Some(0));
                }
            }
            TabIndex::Search => {
                if !self.search_results.is_empty() {
                    self.search_list_state.select(Some(0));
                }
            }
            TabIndex::Settings => {
                self.settings_list_state.select(Some(0));
            }
        }
    }

    pub fn go_to_last(&mut self) {
        match self.current_tab {
            TabIndex::Series => {
                if !self.series.is_empty() {
                    self.series_list_state.select(Some(self.series.len() - 1));
                }
            }
            TabIndex::Calendar => {
                if !self.calendar.is_empty() {
                    self.episodes_list_state
                        .select(Some(self.calendar.len() - 1));
                }
            }
            TabIndex::Queue => {
                if !self.queue.is_empty() {
                    self.queue_table_state.select(Some(self.queue.len() - 1));
                }
            }
            TabIndex::History => {
                if !self.history.is_empty() {
                    self.history_table_state
                        .select(Some(self.history.len() - 1));
                }
            }
            TabIndex::Health => {
                if !self.health.is_empty() {
                    self.health_list_state.select(Some(self.health.len() - 1));
                }
            }
            TabIndex::Search => {
                if !self.search_results.is_empty() {
                    self.search_list_state
                        .select(Some(self.search_results.len() - 1));
                }
            }
            TabIndex::Settings => {
                self.settings_list_state.select(Some(4)); // Total settings options - 1
            }
        }
    }

    pub fn toggle_keybind_mode(&mut self) {
        self.config.ui.keybind_mode = match self.config.ui.keybind_mode {
            KeybindMode::Normal => KeybindMode::Vim,
            KeybindMode::Vim => KeybindMode::Normal,
        };
        self.config_changed = true;
    }

    pub fn toggle_help(&mut self) {
        self.config.ui.show_help = !self.config.ui.show_help;
        self.config_changed = true;
    }

    pub fn handle_settings_input(&mut self) {
        if let Some(selected) = self.settings_list_state.selected() {
            match selected {
                0 => self.toggle_keybind_mode(),
                1 => self.toggle_help(),
                2 => self.start_editing_url(),
                3 => self.start_editing_api_key(),
                _ => {}
            }
        }
    }

    pub fn start_editing_url(&mut self) {
        self.editing_url = true;
        self.input_mode = true;
        self.url_input = self.config.sonarr.url.clone();
    }

    pub fn start_editing_api_key(&mut self) {
        self.editing_api_key = true;
        self.input_mode = true;
        self.api_key_input = self.config.sonarr.api_key.clone();
    }

    pub fn finish_editing_url(&mut self) {
        let trimmed_url = self.url_input.trim();
        if !trimmed_url.is_empty() {
            // Basic URL validation
            if trimmed_url.starts_with("http://") || trimmed_url.starts_with("https://") {
                self.config.sonarr.url = trimmed_url.to_string();
                self.config_changed = true;
            } else {
                self.set_error("URL must start with http:// or https://".to_string());
            }
        }
        self.editing_url = false;
        self.input_mode = false;
        self.url_input.clear();
    }

    pub fn finish_editing_api_key(&mut self) {
        if !self.api_key_input.trim().is_empty() {
            self.config.sonarr.api_key = self.api_key_input.trim().to_string();
            self.config_changed = true;
        }
        self.editing_api_key = false;
        self.input_mode = false;
        self.api_key_input.clear();
    }

    pub fn cancel_editing(&mut self) {
        self.editing_url = false;
        self.editing_api_key = false;
        self.input_mode = false;
        self.url_input.clear();
        self.api_key_input.clear();
    }

    pub fn next_settings_item(&mut self) {
        let i = match self.settings_list_state.selected() {
            Some(i) => {
                if i >= 4 {
                    0
                } else {
                    i + 1
                }
            }
            None => 0,
        };
        self.settings_list_state.select(Some(i));
    }

    pub fn previous_settings_item(&mut self) {
        let i = match self.settings_list_state.selected() {
            Some(i) => {
                if i == 0 {
                    4
                } else {
                    i - 1
                }
            }
            None => 0,
        };
        self.settings_list_state.select(Some(i));
    }

    pub fn save_config(&mut self) -> Result<(), Box<dyn std::error::Error>> {
        if !self.config_changed {
            return Ok(());
        }

        // Find a writable config path
        let config_paths = crate::config::AppConfig::get_default_config_paths();
        let config_path = if let Some(path) = config_paths.get(1) {
            // Prefer user config directory
            path.clone()
        } else {
            std::env::current_dir()?.join("yarr.toml")
        };

        // Create directory if it doesn't exist
        if let Some(parent) = config_path.parent() {
            std::fs::create_dir_all(parent)?;
        }

        // Save the config
        let toml_content = toml::to_string_pretty(&self.config)?;
        std::fs::write(&config_path, toml_content)?;

        self.config_changed = false;
        Ok(())
    }
}

pub async fn run_app(
    client: SonarrClient,
    config: AppConfig,
) -> Result<(), Box<dyn std::error::Error>> {
    // Setup terminal
    enable_raw_mode()?;
    let mut stdout = io::stdout();
    execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::new(backend)?;

    // Create app and run it
    let mut app = App::default();
    app.config = config;
    let res = run_tui(&mut terminal, &mut app, client).await;

    // Restore terminal
    disable_raw_mode()?;
    execute!(
        terminal.backend_mut(),
        LeaveAlternateScreen,
        DisableMouseCapture
    )?;
    terminal.show_cursor()?;

    res
}

async fn run_tui<B: Backend>(
    terminal: &mut Terminal<B>,
    app: &mut App,
    client: SonarrClient,
) -> Result<(), Box<dyn std::error::Error>> {
    let (tx, mut rx) = mpsc::unbounded_channel();

    // Spawn task to handle keyboard input
    let tx_input = tx.clone();
    tokio::spawn(async move {
        let mut last_tick = Instant::now();
        let tick_rate = Duration::from_millis(250);

        loop {
            let timeout = tick_rate
                .checked_sub(last_tick.elapsed())
                .unwrap_or_else(|| Duration::from_secs(0));

            if event::poll(timeout).unwrap() {
                if let Event::Key(key) = event::read().unwrap() {
                    if key.kind == KeyEventKind::Press {
                        if tx_input.send(AppEvent::Key(key)).is_err() {
                            return;
                        }
                    }
                }
            }

            if last_tick.elapsed() >= tick_rate {
                if tx_input.send(AppEvent::Tick).is_err() {
                    return;
                }
                last_tick = Instant::now();
            }
        }
    });

    // Load initial data
    load_all_data(client.clone(), tx.clone()).await;

    // Main event loop
    while !app.should_quit {
        terminal.draw(|f| ui(f, app))?;

        if let Some(event) = rx.recv().await {
            match event {
                AppEvent::Key(key) => {
                    handle_input(app, key, client.clone(), tx.clone()).await;
                }
                AppEvent::Tick => {
                    // Handle periodic updates if needed
                }
                AppEvent::Error(err) => {
                    app.set_error(err);
                    app.loading = false;
                }
                AppEvent::SeriesLoaded(series) => {
                    app.series = series;
                    app.loading = false;
                    if !app.series.is_empty() && app.series_list_state.selected().is_none() {
                        app.series_list_state.select(Some(0));
                    }
                }
                AppEvent::EpisodesLoaded(episodes) => {
                    app.episodes = episodes;
                    app.loading = false;
                }
                AppEvent::QueueLoaded(queue) => {
                    app.queue = queue;
                    app.loading = false;
                }
                AppEvent::HistoryLoaded(history) => {
                    app.history = history;
                    app.loading = false;
                }
                AppEvent::SystemStatusLoaded(status) => {
                    app.system_status = Some(status);
                    app.loading = false;
                }
                AppEvent::HealthLoaded(health) => {
                    app.health = health;
                    app.loading = false;
                }
                AppEvent::CalendarLoaded(calendar) => {
                    app.calendar = calendar;
                    app.loading = false;
                }
                AppEvent::SearchResults(results) => {
                    app.search_results = results;
                    app.loading = false;
                    if !app.search_results.is_empty() {
                        app.search_list_state.select(Some(0));
                    }
                }
                AppEvent::ReleasesLoaded(releases) => {
                    app.releases = releases;
                    app.loading_releases = false;
                    if !app.releases.is_empty() {
                        app.releases_list_state.select(Some(0));
                    }
                }
                AppEvent::ReleaseDownloaded(title) => {
                    app.hide_releases_popup();
                    app.set_error(format!("Successfully started download: {}", title));
                    app.loading = false;
                }
            }
        }
    }

    Ok(())
}

async fn load_all_data(client: SonarrClient, tx: mpsc::UnboundedSender<AppEvent>) {
    // Load system status
    let client_clone = client.clone();
    let tx_clone = tx.clone();
    tokio::spawn(async move {
        match client_clone.get_system_status().await {
            Ok(status) => {
                let _ = tx_clone.send(AppEvent::SystemStatusLoaded(status));
            }
            Err(e) => {
                let _ = tx_clone.send(AppEvent::Error(format!(
                    "Failed to load system status: {}",
                    e
                )));
            }
        }
    });

    // Load series
    let client_clone = client.clone();
    let tx_clone = tx.clone();
    tokio::spawn(async move {
        match client_clone.get_series().await {
            Ok(series) => {
                let _ = tx_clone.send(AppEvent::SeriesLoaded(series));
            }
            Err(e) => {
                let _ = tx_clone.send(AppEvent::Error(format!("Failed to load series: {}", e)));
            }
        }
    });

    // Load queue
    let client_clone = client.clone();
    let tx_clone = tx.clone();
    tokio::spawn(async move {
        match client_clone.get_queue().await {
            Ok(queue_data) => {
                let _ = tx_clone.send(AppEvent::QueueLoaded(queue_data.records));
            }
            Err(e) => {
                let _ = tx_clone.send(AppEvent::Error(format!("Failed to load queue: {}", e)));
            }
        }
    });

    // Load history
    let client_clone = client.clone();
    let tx_clone = tx.clone();
    tokio::spawn(async move {
        match client_clone.get_history().await {
            Ok(history_data) => {
                let _ = tx_clone.send(AppEvent::HistoryLoaded(history_data.records));
            }
            Err(e) => {
                let _ = tx_clone.send(AppEvent::Error(format!("Failed to load history: {}", e)));
            }
        }
    });

    // Load health
    let client_clone = client.clone();
    let tx_clone = tx.clone();
    tokio::spawn(async move {
        match client_clone.get_health().await {
            Ok(health) => {
                let _ = tx_clone.send(AppEvent::HealthLoaded(health));
            }
            Err(e) => {
                let _ = tx_clone.send(AppEvent::Error(format!("Failed to load health: {}", e)));
            }
        }
    });

    // Load calendar (upcoming episodes)
    let tx_clone = tx;
    tokio::spawn(async move {
        let start = chrono::Utc::now().format("%Y-%m-%d").to_string();
        let end = (chrono::Utc::now() + chrono::Duration::days(7))
            .format("%Y-%m-%d")
            .to_string();

        match client.get_calendar(Some(&start), Some(&end)).await {
            Ok(calendar) => {
                let _ = tx_clone.send(AppEvent::CalendarLoaded(calendar));
            }
            Err(e) => {
                let _ = tx_clone.send(AppEvent::Error(format!("Failed to load calendar: {}", e)));
            }
        }
    });
}

async fn handle_input(
    app: &mut App,
    key: crossterm::event::KeyEvent,
    client: SonarrClient,
    tx: mpsc::UnboundedSender<AppEvent>,
) {
    if app.input_mode {
        handle_input_mode(app, key, client, tx).await;
    } else {
        match app.config.ui.keybind_mode {
            KeybindMode::Normal => handle_normal_mode(app, key, client, tx).await,
            KeybindMode::Vim => handle_vim_mode(app, key, client, tx).await,
        }
    }
}

async fn handle_input_mode(
    app: &mut App,
    key: crossterm::event::KeyEvent,
    client: SonarrClient,
    tx: mpsc::UnboundedSender<AppEvent>,
) {
    match key.code {
        KeyCode::Enter => {
            if app.editing_url {
                app.finish_editing_url();
            } else if app.editing_api_key {
                app.finish_editing_api_key();
            } else if !app.search_input.is_empty() {
                app.loading = true;
                let search_term = app.search_input.clone();
                let client_clone = client.clone();
                let tx_clone = tx.clone();
                tokio::spawn(async move {
                    match client_clone.search_series(&search_term).await {
                        Ok(results) => {
                            let _ = tx_clone.send(AppEvent::SearchResults(results));
                        }
                        Err(e) => {
                            let _ = tx_clone.send(AppEvent::Error(format!("Search failed: {}", e)));
                        }
                    }
                });
                app.input_mode = false;
            }
        }
        KeyCode::Esc => {
            if app.editing_url || app.editing_api_key {
                app.cancel_editing();
            } else {
                app.exit_search_mode();
            }
        }
        KeyCode::Char(c) => {
            if app.editing_url {
                app.url_input.push(c);
            } else if app.editing_api_key {
                app.api_key_input.push(c);
            } else {
                app.search_input.push(c);
            }
        }
        KeyCode::Backspace => {
            if app.editing_url {
                app.url_input.pop();
            } else if app.editing_api_key {
                app.api_key_input.pop();
            } else {
                app.search_input.pop();
            }
        }
        _ => {}
    }
}

async fn handle_normal_mode(
    app: &mut App,
    key: crossterm::event::KeyEvent,
    client: SonarrClient,
    tx: mpsc::UnboundedSender<AppEvent>,
) {
    match key.code {
        KeyCode::Char('q') => app.should_quit = true,
        KeyCode::Tab => app.next_tab(),
        KeyCode::BackTab => app.previous_tab(),
        KeyCode::Down | KeyCode::Char('j') => {
            if app.current_tab == TabIndex::Settings {
                app.next_settings_item();
            } else {
                app.next_item();
            }
        }
        KeyCode::Up | KeyCode::Char('k') => {
            if app.current_tab == TabIndex::Settings {
                app.previous_settings_item();
            } else {
                app.previous_item();
            }
        }
        KeyCode::Char('d') => app.toggle_details(),
        KeyCode::Char('r') => {
            app.loading = true;
            app.clear_error();
            tokio::spawn(async move {
                load_all_data(client, tx).await;
            });
        }
        KeyCode::Char('/') => {
            if app.current_tab == TabIndex::Search {
                app.enter_search_mode();
            }
        }
        KeyCode::Char('s') => {
            if let Err(e) = app.save_config() {
                app.set_error(format!("Failed to save config: {}", e));
            }
        }
        KeyCode::Enter => {
            if app.show_releases_popup {
                // Download the selected release
                if let Some(release) = app.get_selected_release().cloned() {
                    let client_clone = client.clone();
                    let tx_clone = tx.clone();
                    tokio::spawn(async move {
                        match client_clone.download_release(&release).await {
                            Ok(()) => {
                                let title = release.title.unwrap_or_default();
                                let _ = tx_clone.send(AppEvent::ReleaseDownloaded(title));
                            }
                            Err(e) => {
                                let _ = tx_clone
                                    .send(AppEvent::Error(format!("Download failed: {}", e)));
                            }
                        }
                    });
                    app.hide_releases_popup();
                }
            } else if app.current_tab == TabIndex::Search && !app.search_results.is_empty() {
                // Show releases popup for selected search result
                if let Some(selected_series) = app.get_selected_search_result().cloned() {
                    app.show_releases_popup(selected_series.clone());
                    let client_clone = client.clone();
                    let tx_clone = tx.clone();
                    let series_id = selected_series.id.unwrap_or(0);
                    tokio::spawn(async move {
                        match client_clone
                            .search_releases(Some(series_id), None, None)
                            .await
                        {
                            Ok(releases) => {
                                let _ = tx_clone.send(AppEvent::ReleasesLoaded(releases));
                            }
                            Err(e) => {
                                let _ = tx_clone.send(AppEvent::Error(format!(
                                    "Failed to load releases: {}",
                                    e
                                )));
                            }
                        }
                    });
                }
            } else if app.current_tab == TabIndex::Settings {
                app.handle_settings_input();
            }
        }
        KeyCode::Esc => {
            if app.show_releases_popup {
                app.hide_releases_popup();
            } else {
                app.clear_error();
                if app.search_mode {
                    app.exit_search_mode();
                }
            }
        }
        _ => {}
    }
}

async fn handle_vim_mode(
    app: &mut App,
    key: crossterm::event::KeyEvent,
    client: SonarrClient,
    tx: mpsc::UnboundedSender<AppEvent>,
) {
    match key.code {
        // Vim-like quit
        KeyCode::Char('q') => app.should_quit = true,

        // Tab navigation
        KeyCode::Char('w') | KeyCode::Tab => app.next_tab(),
        KeyCode::Char('b') | KeyCode::BackTab => app.previous_tab(),

        // Vim navigation
        KeyCode::Char('j') | KeyCode::Down => {
            if app.current_tab == TabIndex::Settings {
                app.next_settings_item();
            } else {
                app.next_item();
            }
        }
        KeyCode::Char('k') | KeyCode::Up => {
            if app.current_tab == TabIndex::Settings {
                app.previous_settings_item();
            } else {
                app.previous_item();
            }
        }
        KeyCode::Char('h') | KeyCode::Left => app.previous_tab(),
        KeyCode::Char('l') | KeyCode::Right => app.next_tab(),

        // Go to first/last
        KeyCode::Char('g') => {
            // Handle gg for go to first (simplified - in real vim this would need state)
            app.go_to_first();
        }
        KeyCode::Char('G') => app.go_to_last(),

        // Other vim-like commands
        KeyCode::Char('v') => app.toggle_details(), // visual/details mode
        KeyCode::Char('u') => {
            // undo/refresh
            app.loading = true;
            app.clear_error();
            tokio::spawn(async move {
                load_all_data(client, tx).await;
            });
        }
        KeyCode::Char('/') => {
            if app.current_tab == TabIndex::Search {
                app.enter_search_mode();
            }
        }
        KeyCode::Char('i') => {
            // insert mode - enter search if on search tab
            if app.current_tab == TabIndex::Search {
                app.enter_search_mode();
            }
        }
        KeyCode::Enter => {
            if app.current_tab == TabIndex::Settings {
                app.handle_settings_input();
            }
        }
        KeyCode::Char('s') => {
            if let Err(e) = app.save_config() {
                app.set_error(format!("Failed to save config: {}", e));
            }
        }
        KeyCode::Esc => {
            app.clear_error();
            if app.search_mode {
                app.exit_search_mode();
            }
        }
        _ => {}
    }
}

fn ui(f: &mut Frame, app: &App) {
    let size = f.area();

    // Create main layout
    let chunks = Layout::default()
        .direction(Direction::Vertical)
        .constraints([
            Constraint::Length(3), // Header
            Constraint::Min(0),    // Main content
            Constraint::Length(3), // Footer
        ])
        .split(size);

    // Render header
    render_header(f, chunks[0], app);

    // Render main content based on current tab
    match app.current_tab {
        TabIndex::Series => render_series_tab(f, chunks[1], app),
        TabIndex::Calendar => render_calendar_tab(f, chunks[1], app),
        TabIndex::Queue => render_queue_tab(f, chunks[1], app),
        TabIndex::History => render_history_tab(f, chunks[1], app),
        TabIndex::Health => render_health_tab(f, chunks[1], app),
        TabIndex::Search => render_search_tab(f, chunks[1], app),
        TabIndex::Settings => render_settings_tab(f, chunks[1], app),
    }

    // Render footer
    render_footer(f, chunks[2], app);

    // Render releases popup if it should be shown
    if app.show_releases_popup {
        render_releases_popup(f, app);
    }

    // Render error popup if there's an error
    if app.error_message.is_some() {
        render_error_popup(f, size, app);
    }
}

fn render_header(f: &mut Frame, area: Rect, app: &App) {
    let tabs = Tabs::new(TabIndex::titles())
        .block(
            Block::default()
                .borders(Borders::ALL)
                .title("Yarr - Sonarr TUI"),
        )
        .style(Style::default().fg(Color::White))
        .highlight_style(
            Style::default()
                .fg(Color::Yellow)
                .add_modifier(Modifier::BOLD),
        )
        .select(app.current_tab.to_index());

    f.render_widget(tabs, area);
}

fn render_series_tab(f: &mut Frame, area: Rect, app: &App) {
    if app.series.is_empty() {
        let loading_text = if app.loading {
            "Loading series..."
        } else {
            "No series found"
        };
        let paragraph = Paragraph::new(loading_text)
            .block(Block::default().borders(Borders::ALL).title("Series"))
            .alignment(Alignment::Center);
        f.render_widget(paragraph, area);
        return;
    }

    let items: Vec<ListItem> = app
        .series
        .iter()
        .map(|s| {
            let title = s.title.as_deref().unwrap_or("Unknown");
            let status = &s.status;
            let monitored = if s.monitored { "✓" } else { "✗" };

            let stats = s
                .statistics
                .as_ref()
                .map(|stats| format!(" ({}/{})", stats.episode_file_count, stats.episode_count))
                .unwrap_or_default();

            ListItem::new(format!("{} {} [{}]{}", monitored, title, status, stats))
        })
        .collect();

    let list = List::new(items)
        .block(Block::default().borders(Borders::ALL).title("Series"))
        .highlight_style(
            Style::default()
                .fg(Color::Yellow)
                .add_modifier(Modifier::BOLD),
        );

    f.render_stateful_widget(list, area, &mut app.series_list_state.clone());
}

fn render_calendar_tab(f: &mut Frame, area: Rect, app: &App) {
    if app.calendar.is_empty() {
        let loading_text = if app.loading {
            "Loading calendar..."
        } else {
            "No upcoming episodes"
        };
        let paragraph = Paragraph::new(loading_text)
            .block(
                Block::default()
                    .borders(Borders::ALL)
                    .title("Upcoming Episodes"),
            )
            .alignment(Alignment::Center);
        f.render_widget(paragraph, area);
        return;
    }

    let items: Vec<ListItem> = app
        .calendar
        .iter()
        .map(|e| {
            let title = e.title.as_deref().unwrap_or("Unknown Episode");
            let series_title = e
                .series
                .as_ref()
                .and_then(|s| s.title.as_deref())
                .unwrap_or("Unknown Series");
            let air_date = e
                .air_date_utc
                .map(|dt| dt.format("%Y-%m-%d %H:%M").to_string())
                .or_else(|| e.air_date.clone())
                .unwrap_or_default();

            ListItem::new(format!(
                "S{:02}E{:02} {} - {} [{}]",
                e.season_number, e.episode_number, series_title, title, air_date
            ))
        })
        .collect();

    let list = List::new(items)
        .block(
            Block::default()
                .borders(Borders::ALL)
                .title("Upcoming Episodes (Next 7 Days)"),
        )
        .highlight_style(
            Style::default()
                .fg(Color::Yellow)
                .add_modifier(Modifier::BOLD),
        );

    f.render_stateful_widget(list, area, &mut app.episodes_list_state.clone());
}

fn render_queue_tab(f: &mut Frame, area: Rect, app: &App) {
    if app.queue.is_empty() {
        let loading_text = if app.loading {
            "Loading queue..."
        } else {
            "Queue is empty"
        };
        let paragraph = Paragraph::new(loading_text)
            .block(
                Block::default()
                    .borders(Borders::ALL)
                    .title("Download Queue"),
            )
            .alignment(Alignment::Center);
        f.render_widget(paragraph, area);
        return;
    }

    let header = Row::new(vec!["Title", "Status", "Progress", "Quality", "Size"]);
    let rows: Vec<Row> = app
        .queue
        .iter()
        .map(|q| {
            let title = q.title.as_deref().unwrap_or("Unknown");
            let status = &q.status;
            let quality = q
                .quality
                .as_ref()
                .and_then(|qual| qual.quality.name.as_deref())
                .unwrap_or("Unknown");
            let size = format!("{:.1} GB", q.size / 1_000_000_000.0);

            // Simple progress calculation (this would need more sophisticated logic in real implementation)
            let progress = "50%"; // Placeholder

            Row::new(vec![
                Cell::from(title),
                Cell::from(status.as_str()),
                Cell::from(progress),
                Cell::from(quality),
                Cell::from(size),
            ])
        })
        .collect();

    let table = Table::new(
        rows,
        &[
            Constraint::Percentage(40),
            Constraint::Percentage(15),
            Constraint::Percentage(15),
            Constraint::Percentage(15),
            Constraint::Percentage(15),
        ],
    )
    .header(header.style(Style::default().fg(Color::Yellow)))
    .block(
        Block::default()
            .borders(Borders::ALL)
            .title("Download Queue"),
    )
    .row_highlight_style(
        Style::default()
            .fg(Color::Yellow)
            .add_modifier(Modifier::BOLD),
    );

    f.render_stateful_widget(table, area, &mut app.queue_table_state.clone());
}

fn render_history_tab(f: &mut Frame, area: Rect, app: &App) {
    if app.history.is_empty() {
        let loading_text = if app.loading {
            "Loading history..."
        } else {
            "No history found"
        };
        let paragraph = Paragraph::new(loading_text)
            .block(Block::default().borders(Borders::ALL).title("History"))
            .alignment(Alignment::Center);
        f.render_widget(paragraph, area);
        return;
    }

    let header = Row::new(vec!["Date", "Series", "Episode", "Event", "Quality"]);
    let rows: Vec<Row> = app
        .history
        .iter()
        .map(|h| {
            let date = h.date.format("%Y-%m-%d %H:%M").to_string();
            let series = h
                .series
                .as_ref()
                .and_then(|s| s.title.as_deref())
                .unwrap_or("Unknown");
            let episode = h
                .episode
                .as_ref()
                .map(|e| format!("S{:02}E{:02}", e.season_number, e.episode_number))
                .unwrap_or_default();
            let event = h.event_type.as_deref().unwrap_or("Unknown");
            let quality = h
                .quality
                .as_ref()
                .and_then(|q| q.quality.name.as_deref())
                .unwrap_or("Unknown");

            Row::new(vec![
                Cell::from(date),
                Cell::from(series),
                Cell::from(episode),
                Cell::from(event),
                Cell::from(quality),
            ])
        })
        .collect();

    let table = Table::new(
        rows,
        &[
            Constraint::Percentage(20),
            Constraint::Percentage(30),
            Constraint::Percentage(15),
            Constraint::Percentage(20),
            Constraint::Percentage(15),
        ],
    )
    .header(header.style(Style::default().fg(Color::Yellow)))
    .block(Block::default().borders(Borders::ALL).title("History"))
    .row_highlight_style(
        Style::default()
            .fg(Color::Yellow)
            .add_modifier(Modifier::BOLD),
    );

    f.render_stateful_widget(table, area, &mut app.history_table_state.clone());
}

fn render_health_tab(f: &mut Frame, area: Rect, app: &App) {
    if app.health.is_empty() {
        let loading_text = if app.loading {
            "Loading health status..."
        } else {
            "All systems healthy"
        };
        let paragraph = Paragraph::new(loading_text)
            .block(
                Block::default()
                    .borders(Borders::ALL)
                    .title("Health Status"),
            )
            .alignment(Alignment::Center)
            .style(Style::default().fg(Color::Green));
        f.render_widget(paragraph, area);
        return;
    }

    let items: Vec<ListItem> = app
        .health
        .iter()
        .map(|h| {
            let source = h.source.as_deref().unwrap_or("System");
            let message = h.message.as_deref().unwrap_or("No message");
            let health_type = &h.health_type;

            let color = match health_type.as_str() {
                "error" => Color::Red,
                "warning" => Color::Yellow,
                "notice" => Color::Blue,
                _ => Color::Green,
            };

            ListItem::new(format!(
                "[{}] {}: {}",
                health_type.to_uppercase(),
                source,
                message
            ))
            .style(Style::default().fg(color))
        })
        .collect();

    let list = List::new(items)
        .block(
            Block::default()
                .borders(Borders::ALL)
                .title("Health Status"),
        )
        .highlight_style(Style::default().add_modifier(Modifier::BOLD));

    f.render_stateful_widget(list, area, &mut app.health_list_state.clone());
}

fn render_search_tab(f: &mut Frame, area: Rect, app: &App) {
    let chunks = Layout::default()
        .direction(Direction::Vertical)
        .constraints([Constraint::Length(3), Constraint::Min(0)])
        .split(area);

    // Search input
    let input_style = if app.input_mode {
        Style::default().fg(Color::Yellow)
    } else {
        Style::default()
    };

    let input = Paragraph::new(app.search_input.as_str())
        .style(input_style)
        .block(
            Block::default()
                .borders(Borders::ALL)
                .title("Search Series (Press '/' to search, Enter to execute, Enter on result to view releases)"),
        );
    f.render_widget(input, chunks[0]);

    // Search results
    if app.search_results.is_empty() {
        let text = if app.loading {
            "Searching..."
        } else if app.search_input.is_empty() {
            "Enter a search term and press Enter to search for series"
        } else {
            "No results found - try a different search term"
        };

        let paragraph = Paragraph::new(text)
            .block(
                Block::default()
                    .borders(Borders::ALL)
                    .title("Search Results"),
            )
            .alignment(Alignment::Center);
        f.render_widget(paragraph, chunks[1]);
    } else {
        let items: Vec<ListItem> = app
            .search_results
            .iter()
            .map(|s| {
                let title = s.title.as_deref().unwrap_or("Unknown");
                let year = s.year;
                let network = s.network.as_deref().unwrap_or("Unknown Network");
                let overview = s.overview.as_deref().unwrap_or("");
                let truncated_overview = if overview.len() > 80 {
                    format!("{}...", &overview[..77])
                } else {
                    overview.to_string()
                };

                ListItem::new(format!(
                    "{} ({}) - {} | {}",
                    title, year, network, truncated_overview
                ))
            })
            .collect();

        let list = List::new(items)
            .block(
                Block::default()
                    .borders(Borders::ALL)
                    .title("Search Results (Press Enter on a series to view available releases)"),
            )
            .highlight_style(
                Style::default()
                    .fg(Color::Yellow)
                    .add_modifier(Modifier::BOLD),
            );

        f.render_stateful_widget(list, chunks[1], &mut app.search_list_state.clone());
    }
}

fn render_settings_tab(f: &mut Frame, area: Rect, app: &App) {
    if app.editing_url || app.editing_api_key {
        render_settings_input(f, area, app);
    } else {
        render_settings_list(f, area, app);
    }
}

fn render_settings_list(f: &mut Frame, area: Rect, app: &App) {
    let mut settings_items = vec![
        ListItem::new(format!(
            "Keybind Mode: {} (Press Enter to toggle)",
            match app.config.ui.keybind_mode {
                KeybindMode::Normal => "Normal",
                KeybindMode::Vim => "Vim",
            }
        )),
        ListItem::new(format!(
            "Show Help: {} (Press Enter to toggle)",
            if app.config.ui.show_help { "Yes" } else { "No" }
        )),
        ListItem::new(format!(
            "Sonarr URL: {} (Press Enter to edit)",
            if app.config.sonarr.url.is_empty() {
                "Not set"
            } else {
                &app.config.sonarr.url
            }
        )),
        ListItem::new(format!(
            "API Key: {} (Press Enter to edit)",
            if app.config.sonarr.api_key.is_empty() {
                "Not set"
            } else {
                "***hidden***"
            }
        )),
        ListItem::new(if app.config_changed {
            "Settings changed - Press 's' to save"
        } else {
            "Press 's' to save settings"
        }),
    ];

    // Add keybind help based on current mode
    settings_items.push(ListItem::new(""));
    settings_items.push(ListItem::new("Keybind Modes:"));
    settings_items.push(ListItem::new(
        "  Normal: Standard navigation (arrows, j/k, tab)",
    ));
    settings_items.push(ListItem::new(
        "  Vim: Vim-like navigation (hjkl, gg/G, w/b)",
    ));

    let title = if app.config_changed {
        "Settings (Unsaved Changes)"
    } else {
        "Settings"
    };

    let list = List::new(settings_items)
        .block(Block::default().borders(Borders::ALL).title(title))
        .highlight_style(
            Style::default()
                .fg(Color::Yellow)
                .add_modifier(Modifier::BOLD),
        );

    f.render_stateful_widget(list, area, &mut app.settings_list_state.clone());
}

fn render_settings_input(f: &mut Frame, area: Rect, app: &App) {
    let chunks = Layout::default()
        .direction(Direction::Vertical)
        .constraints([
            Constraint::Length(3), // Input field
            Constraint::Min(0),    // Instructions
        ])
        .split(area);

    let (title, current_input, field_name) = if app.editing_url {
        ("Edit Sonarr URL", &app.url_input, "URL")
    } else if app.editing_api_key {
        ("Edit API Key", &app.api_key_input, "API Key")
    } else {
        ("Settings", &String::new(), "")
    };

    // Input field
    let input = Paragraph::new(current_input.as_str())
        .style(Style::default().fg(Color::Yellow))
        .block(
            Block::default()
                .borders(Borders::ALL)
                .title(format!("{} - {}", title, field_name)),
        );
    f.render_widget(input, chunks[0]);

    // Instructions
    let instructions = vec![
        Line::from("Enter: Save and return"),
        Line::from("Esc: Cancel and return"),
        Line::from(""),
        if app.editing_url {
            Line::from("Enter the Sonarr server URL (must start with http:// or https://)")
        } else {
            Line::from("Enter your Sonarr API key (found in Sonarr Settings > General > Security)")
        },
    ];

    let help = Paragraph::new(instructions)
        .block(Block::default().borders(Borders::ALL).title("Instructions"))
        .wrap(Wrap { trim: true });
    f.render_widget(help, chunks[1]);
}

fn render_footer(f: &mut Frame, area: Rect, app: &App) {
    let help_text = if app.show_releases_popup {
        "Enter: Download | Esc: Close | ↑↓/jk: Navigate"
    } else if app.input_mode {
        if app.editing_url || app.editing_api_key {
            "ESC: Cancel | Enter: Save | Type to enter value"
        } else {
            "ESC: Cancel | Enter: Search | Type to enter search term"
        }
    } else if !app.config.ui.show_help {
        "" // Don't show help if disabled
    } else if app.current_tab == TabIndex::Search && !app.search_results.is_empty() {
        "Enter: Show Releases | ↑↓/jk: Navigate | /: Search | Other: Normal keys"
    } else {
        match app.config.ui.keybind_mode {
            KeybindMode::Normal => {
                "q: Quit | Tab: Next Tab | ↑↓/jk: Navigate | d: Details | r: Refresh | /: Search"
            }
            KeybindMode::Vim => {
                "q: Quit | w/b: Tabs | hjkl: Navigate | v: Details | u: Refresh | /: Search | gg/G: First/Last"
            }
        }
    };

    let mut spans = vec![Span::raw(help_text)];

    if let Some(status) = &app.system_status {
        spans.push(Span::raw(" | "));
        spans.push(Span::styled(
            format!("Sonarr v{}", status.version.as_deref().unwrap_or("Unknown")),
            Style::default().fg(Color::Green),
        ));
    }

    if app.loading {
        spans.push(Span::raw(" | "));
        spans.push(Span::styled(
            "Loading...",
            Style::default().fg(Color::Yellow),
        ));
    }

    let paragraph = Paragraph::new(Line::from(spans))
        .block(Block::default().borders(Borders::ALL))
        .alignment(Alignment::Center);

    f.render_widget(paragraph, area);
}

fn render_error_popup(f: &mut Frame, area: Rect, app: &App) {
    if let Some(error) = &app.error_message {
        let popup_area = centered_rect(60, 20, area);

        f.render_widget(Clear, popup_area);

        let error_paragraph = Paragraph::new(error.as_str())
            .block(
                Block::default()
                    .borders(Borders::ALL)
                    .title("Error")
                    .style(Style::default().fg(Color::Red)),
            )
            .wrap(Wrap { trim: true })
            .alignment(Alignment::Center);

        f.render_widget(error_paragraph, popup_area);
    }
}

fn render_releases_popup(f: &mut Frame, app: &App) {
    let area = centered_rect(80, 70, f.area());

    f.render_widget(Clear, area);

    let title = if let Some(ref series) = app.selected_search_series {
        format!(
            "Releases for: {}",
            series.title.as_deref().unwrap_or("Unknown")
        )
    } else {
        "Releases".to_string()
    };

    let block = Block::default()
        .title(title)
        .borders(Borders::ALL)
        .border_style(Style::default().fg(Color::Yellow));

    if app.loading_releases {
        let loading_text = Paragraph::new("Loading releases...")
            .block(block)
            .alignment(Alignment::Center);
        f.render_widget(loading_text, area);
    } else if app.releases.is_empty() {
        let no_releases_text = Paragraph::new("No releases found")
            .block(block)
            .alignment(Alignment::Center);
        f.render_widget(no_releases_text, area);
    } else {
        let inner_area = block.inner(area);
        f.render_widget(block, area);

        let chunks = Layout::default()
            .direction(Direction::Vertical)
            .constraints([Constraint::Min(0), Constraint::Length(3)])
            .split(inner_area);

        let items: Vec<ListItem> = app
            .releases
            .iter()
            .map(|release| {
                let title = release.title.as_deref().unwrap_or("Unknown");
                let size = format_size(release.size.unwrap_or(0));
                let quality = release.quality_weight.unwrap_or(0);
                let indexer = release.indexer.as_deref().unwrap_or("Unknown");
                let seeds = release.seeders.unwrap_or(0);
                let peers = release.leechers.unwrap_or(0);

                let status = if release.download_allowed.unwrap_or(false) {
                    if release.rejected.unwrap_or(false) {
                        "❌ Rejected"
                    } else {
                        "✅ Available"
                    }
                } else {
                    "⛔ Not Allowed"
                };

                ListItem::new(format!(
                    "{} | {} | Q:{} | {} | S:{} P:{} | {}",
                    status, size, quality, indexer, seeds, peers, title
                ))
            })
            .collect();

        let list = List::new(items).highlight_style(
            Style::default()
                .fg(Color::Yellow)
                .add_modifier(Modifier::BOLD),
        );

        f.render_stateful_widget(list, chunks[0], &mut app.releases_list_state.clone());

        let help_text = Paragraph::new("Enter: Download | Esc: Close | ↑↓: Navigate")
            .style(Style::default().fg(Color::Gray))
            .alignment(Alignment::Center)
            .block(Block::default().borders(Borders::TOP));
        f.render_widget(help_text, chunks[1]);
    }
}

fn format_size(bytes: i64) -> String {
    const UNITS: &[&str] = &["B", "KB", "MB", "GB", "TB"];

    if bytes == 0 {
        return "0 B".to_string();
    }

    let mut size = bytes as f64;
    let mut unit_index = 0;

    while size >= 1024.0 && unit_index < UNITS.len() - 1 {
        size /= 1024.0;
        unit_index += 1;
    }

    format!("{:.1} {}", size, UNITS[unit_index])
}

fn centered_rect(percent_x: u16, percent_y: u16, r: Rect) -> Rect {
    let popup_layout = Layout::default()
        .direction(Direction::Vertical)
        .constraints([
            Constraint::Percentage((100 - percent_y) / 2),
            Constraint::Percentage(percent_y),
            Constraint::Percentage((100 - percent_y) / 2),
        ])
        .split(r);

    Layout::default()
        .direction(Direction::Horizontal)
        .constraints([
            Constraint::Percentage((100 - percent_x) / 2),
            Constraint::Percentage(percent_x),
            Constraint::Percentage((100 - percent_x) / 2),
        ])
        .split(popup_layout[1])[1]
}