use anyhow::Result;
use std::time::Duration;
use strum::IntoEnumIterator as _;
use tui_logger::TuiWidgetState;
use tui_textarea::TextArea;
use uuid::Uuid;
use ratatui::{
prelude::*,
widgets::{Block, Borders, ListState, Padding, Paragraph, Tabs},
};
use crossterm::event::{self, KeyCode, KeyEvent};
use tokio::sync::mpsc;
use tokio::task;
use crate::{
chat::{Chat, ChatState},
chat_message::ChatMessage,
commands::Command,
frontend,
};
use super::{chat_mode, logs_mode, UIEvent, UserInputCommand};
const TICK_RATE: u64 = 250;
const HEADER: &str = include_str!("ascii_logo");
pub struct App<'a> {
pub text_input: TextArea<'a>,
pub chats: Vec<Chat>,
pub current_chat: uuid::Uuid,
pub ui_tx: mpsc::UnboundedSender<UIEvent>,
pub ui_rx: mpsc::UnboundedReceiver<UIEvent>,
pub command_tx: Option<mpsc::UnboundedSender<Command>>,
pub mode: AppMode,
pub chats_state: ListState,
pub tab_names: Vec<&'static str>,
pub selected_tab: usize,
pub log_state: TuiWidgetState,
pub boot_uuid: Uuid,
}
#[derive(Debug, Clone, Copy, Default, PartialEq)]
pub enum AppMode {
#[default]
Chat,
Logs,
Quit,
}
impl AppMode {
fn on_key(self, app: &mut App, key: KeyEvent) {
match self {
AppMode::Chat => chat_mode::on_key(app, key),
AppMode::Logs => logs_mode::on_key(app, key),
AppMode::Quit => (),
}
}
fn ui(self, f: &mut ratatui::Frame, area: Rect, app: &mut App) {
match self {
AppMode::Chat => chat_mode::ui(f, area, app),
AppMode::Logs => logs_mode::ui(f, area, app),
AppMode::Quit => (),
}
}
fn tab_index(self) -> Option<usize> {
match self {
AppMode::Chat => Some(0),
AppMode::Logs => Some(1),
AppMode::Quit => None,
}
}
fn from_index(index: usize) -> Option<Self> {
match index {
0 => Some(AppMode::Chat),
1 => Some(AppMode::Logs),
_ => None,
}
}
}
impl Default for App<'_> {
fn default() -> Self {
let (ui_tx, ui_rx) = mpsc::unbounded_channel();
let chat = Chat {
name: "Chat #1".to_string(),
..Chat::default()
};
Self {
text_input: new_text_area(),
current_chat: chat.uuid,
chats: vec![chat],
ui_tx,
ui_rx,
command_tx: None,
mode: AppMode::default(),
chats_state: ListState::default().with_selected(Some(0)),
tab_names: vec!["[F1] Chats", "[F2] Logs"],
log_state: TuiWidgetState::new()
.set_default_display_level(log::LevelFilter::Off)
.set_level_for_target("kwaak", log::LevelFilter::Info)
.set_level_for_target("swiftide", log::LevelFilter::Info),
selected_tab: 0,
boot_uuid: Uuid::new_v4(),
}
}
}
fn new_text_area() -> TextArea<'static> {
let mut text_area = TextArea::default();
text_area.set_placeholder_text("Send a message to an agent ...");
text_area.set_placeholder_style(Style::default().fg(Color::Gray));
text_area.set_cursor_line_style(Style::reset());
text_area
}
impl App<'_> {
async fn recv_messages(&mut self) -> Option<UIEvent> {
self.ui_rx.recv().await
}
#[allow(clippy::unused_self)]
pub fn supported_commands(&self) -> Vec<UserInputCommand> {
UserInputCommand::iter().collect()
}
pub fn send_ui_event(&self, msg: impl Into<UIEvent>) {
let event = msg.into();
tracing::debug!("Sending ui event {event}");
if let Err(err) = self.ui_tx.send(event) {
tracing::error!("Failed to send ui event {err}");
}
}
pub fn reset_text_input(&mut self) {
self.text_input = new_text_area();
}
fn on_key(&mut self, key: KeyEvent) {
if key.modifiers == crossterm::event::KeyModifiers::CONTROL
&& key.code == KeyCode::Char('c')
{
tracing::warn!("Ctrl-C pressed, quitting");
return self.send_ui_event(UIEvent::Quit);
}
if let KeyCode::F(index) = key.code {
let index = index - 1;
if let Some(mode) = AppMode::from_index(index as usize) {
return self.change_mode(mode);
}
}
self.mode.on_key(self, key);
}
#[tracing::instrument(skip(self))]
pub fn dispatch_command(&mut self, cmd: &Command) {
self.current_chat_mut().transition(ChatState::Loading);
self.command_tx
.as_ref()
.expect("Command tx not set")
.send(cmd.clone())
.expect("Failed to dispatch command");
}
fn add_chat_message(&mut self, message: ChatMessage) {
if message.uuid() == Some(self.boot_uuid) {
return;
}
let chat = self.find_chat_mut(message.uuid().unwrap_or(self.current_chat));
chat.add_message(message);
}
#[tracing::instrument(skip_all)]
pub async fn run<B: ratatui::backend::Backend>(
&mut self,
terminal: &mut Terminal<B>,
) -> Result<()> {
let handle = task::spawn(poll_ui_events(self.ui_tx.clone()));
let mut has_indexed_on_boot = false;
let mut splash = frontend::splash::Splash::default();
self.dispatch_command(&Command::IndexRepository {
uuid: self.boot_uuid,
});
loop {
terminal.draw(|f| {
if has_indexed_on_boot && splash.is_rendered() {
let base_area = self.draw_base_ui(f);
self.mode.ui(f, base_area, self);
} else {
splash.render(f, "Indexing your code ...");
std::thread::sleep(Duration::from_millis(100));
}
})?;
if self.mode == AppMode::Quit {
break;
}
if let Some(event) = self.recv_messages().await {
if !matches!(event, UIEvent::Tick | UIEvent::Input(_)) {
tracing::debug!("Received ui event: {:?}", event);
}
match event {
UIEvent::Input(key) => {
self.on_key(key);
}
UIEvent::Tick => {
}
UIEvent::CommandDone(uuid) => {
if uuid == self.boot_uuid {
has_indexed_on_boot = true;
self.current_chat_mut().transition(ChatState::Ready);
} else {
self.find_chat_mut(uuid).transition(ChatState::Ready);
}
}
UIEvent::AgentActivity(uuid, activity) => {
self.find_chat_mut(uuid)
.transition(ChatState::LoadingWithMessage(activity));
}
UIEvent::ChatMessage(message) => {
self.add_chat_message(message);
}
UIEvent::NewChat => {
self.add_chat(Chat::default());
}
UIEvent::NextChat => self.next_chat(),
UIEvent::ChangeMode(mode) => self.change_mode(mode),
UIEvent::Quit => {
tracing::warn!("UI received quit event, quitting");
self.dispatch_command(&Command::Quit {
uuid: self.current_chat,
});
self.change_mode(AppMode::Quit);
}
}
}
}
tracing::warn!("Quitting frontend");
handle.abort();
Ok(())
}
fn find_chat_mut(&mut self, uuid: Uuid) -> &mut Chat {
self.chats
.iter_mut()
.find(|chat| chat.uuid == uuid)
.unwrap_or_else(|| panic!("Could not find chat for {uuid}"))
}
fn find_chat(&self, uuid: Uuid) -> &Chat {
self.chats
.iter()
.find(|chat| chat.uuid == uuid)
.unwrap_or_else(|| panic!("Could not find chat for {uuid}"))
}
pub(crate) fn current_chat(&self) -> &Chat {
self.find_chat(self.current_chat)
}
pub(crate) fn current_chat_mut(&mut self) -> &mut Chat {
self.find_chat_mut(self.current_chat)
}
fn add_chat(&mut self, mut new_chat: Chat) {
new_chat.name = format!("Chat #{}", self.chats.len() + 1);
self.current_chat = new_chat.uuid;
self.chats.push(new_chat);
self.chats_state.select_last();
}
fn next_chat(&mut self) {
#[allow(clippy::skip_while_next)]
let Some(next_idx) = self
.chats
.iter()
.position(|chat| chat.uuid == self.current_chat)
.map(|idx| idx + 1)
else {
assert!(
!cfg!(debug_assertions),
"Could not find current chat in chats"
);
return;
};
if let Some(chat) = self.chats.get(next_idx) {
self.chats_state.select(Some(next_idx));
self.current_chat = chat.uuid;
} else {
self.chats_state.select(Some(0));
self.current_chat = self.chats[0].uuid;
}
}
fn draw_base_ui(&self, f: &mut Frame) -> Rect {
let [top_area, main_area] =
Layout::vertical([Constraint::Length(6), Constraint::Min(0)]).areas(f.area());
let [header_area, tabs_area] =
Layout::horizontal([Constraint::Fill(1), Constraint::Length(24)]).areas(top_area);
Tabs::new(self.tab_names.iter().copied())
.block(
Block::default()
.borders(Borders::BOTTOM)
.padding(Padding::top(top_area.height - 2)),
)
.highlight_style(Style::default().add_modifier(Modifier::REVERSED))
.select(self.selected_tab)
.render(tabs_area, f.buffer_mut());
Paragraph::new(HEADER)
.block(
Block::default()
.borders(Borders::BOTTOM)
.padding(Padding::new(1, 0, 1, 0)),
)
.render(header_area, f.buffer_mut());
main_area
}
fn change_mode(&mut self, mode: AppMode) {
self.mode = mode;
if let Some(tab_index) = mode.tab_index() {
self.selected_tab = tab_index;
}
}
}
#[allow(clippy::unused_async)]
async fn poll_ui_events(ui_tx: mpsc::UnboundedSender<UIEvent>) -> Result<()> {
loop {
if event::poll(Duration::from_millis(TICK_RATE))? {
if let crossterm::event::Event::Key(key) = event::read()? {
let _ = ui_tx.send(UIEvent::Input(key));
}
}
let _ = ui_tx.send(UIEvent::Tick);
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_last_or_first_chat() {
let mut app = App::default();
let chat = Chat::default();
let first_uuid = app.current_chat;
let second_uuid = chat.uuid;
assert_eq!(app.current_chat, first_uuid);
app.add_chat(chat);
assert_eq!(app.current_chat, second_uuid);
app.next_chat();
assert_eq!(app.current_chat, first_uuid);
app.next_chat();
assert_eq!(app.current_chat, second_uuid);
}
#[test]
fn test_app_mode_from_index() {
assert_eq!(AppMode::from_index(0), Some(AppMode::Chat));
assert_eq!(AppMode::from_index(1), Some(AppMode::Logs));
assert_eq!(AppMode::from_index(2), None);
}
#[test]
fn test_app_mode_tab_index() {
assert_eq!(AppMode::Chat.tab_index(), Some(0));
assert_eq!(AppMode::Logs.tab_index(), Some(1));
assert_eq!(AppMode::Quit.tab_index(), None);
}
#[test]
fn test_change_mode() {
let mut app = App::default();
assert_eq!(app.mode, AppMode::Chat);
assert_eq!(app.selected_tab, 0);
app.change_mode(AppMode::Logs);
assert_eq!(app.mode, AppMode::Logs);
assert_eq!(app.selected_tab, 1);
app.change_mode(AppMode::Quit);
assert_eq!(app.mode, AppMode::Quit);
assert_eq!(app.selected_tab, 1);
}
}