agent_tui/tui/

mod.rs

//! Chat TUI binary — event loop, terminal setup, module wiring.
mod transcript;

mod app;
/// A4: the TUI over `SocketTransport` (`synaps --attach`).
pub mod attach;
pub mod client_diet;
mod clock;
mod commands;
mod dispatch;
mod draw;
mod driver_client;
mod effort;
mod focus;
mod gamba;
mod help_find;
mod helpers;
mod highlight;
mod input;
mod lifecycle;
mod lightbox;
mod loop_arms;
mod markdown;
mod models;
mod plugins;
pub mod quit_guard;
mod render;
mod render_model;
mod render_thread;
mod run_setup;
mod session_link;
mod settings;
mod sidecar;
mod signals;
mod stream_handler;
/// P16.1: terminal capability facts (env-only detection; inert seam).
mod termcaps;
/// Headless test harness — see [`testing::TestHarness`]. Compiled only for
/// in-crate tests or downstream consumers of the `testing` feature.
#[cfg(any(test, feature = "testing"))]
pub mod testing;
pub(crate) mod text_metrics;
mod theme;
mod toast;
mod view_model;
mod viewport;

/// Single process-global lock for ALL tests that mutate config-env vars
/// (`SYNAPS_BASE_DIR`, `HOME`).  Both `migration_tests` (this file) and the
/// `BASE_DIR_TEST_LOCK` tests in `plugins/actions.rs` must hold this lock for
/// the duration of any test that sets or reads those vars, so the two groups
/// can never interleave even when `cargo test` runs them on parallel threads.
#[cfg(test)]
pub(crate) static CONFIG_ENV_TEST_LOCK: std::sync::Mutex<()> = std::sync::Mutex::new(());

pub use run_setup::push_boot_notice;

use app::{App, ChatMessage};
use commands::CommandAction;
use draw::{boot_effect, build_render_model, quit_effect};
use helpers::{apply_setting, fetch_usage, rebuild_display_messages, should_draw};
use input::InputAction;
use lifecycle::setup_terminal;
use render_thread::spawn_render_thread;

use crossterm::event::EventStream;
use futures::StreamExt;
use serde_json::json;
use std::sync::atomic::Ordering;
use std::time::Instant;
use synaps_cli::Result;

use agent_engine::session::{EndReason, SessionCommand};

pub async fn run(
    continue_session: Option<Option<String>>,
    system: Option<String>,
    prompt_manifest: Option<std::path::PathBuf>,
    profile: Option<String>,
    no_extensions: bool,
) -> Result<()> {
    // ── Boot prologue (P12.1: extracted to run_setup.rs) ──
    // run_setup performs engine-boot unpack, App construction (incl. the
    // resumed-session branch), channel/handle setup, render-thread spawn,
    // and tick-throttle init. Behavior byte-identical; the loop below owns
    // every field by value exactly as it did when they were locals.
    let ctx = run_setup::run_setup(
        continue_session,
        system,
        prompt_manifest,
        profile,
        no_extensions,
    )
    .await?;
    run_loop(ctx).await
}

/// The event loop + teardown, shared by the in-process boot and the socket
/// attach (`run_attached`).
pub(crate) async fn run_loop(ctx: run_setup::RunContext) -> Result<()> {
    let run_setup::RunContext {
        mut app,
        mut link,
        http,
        mut prompt_bridge,
        mode,
        mut config,
        registry,
        keybind_registry,
        system_prompt_path,
        render_handle,
        boot_done,
        exit_done,
        term_caps,
        event_reader,
        mut shutdown_signal_rx,
        shutdown_signal_task,
        secret_prompt_rx,
        ext_mgr_shared,
        mut boot_fx_sent,
        mut exit_fx_sent,
        mut last_draw,
    } = ctx;
    // P16.1+P16.2: terminal capabilities — env detection merged with the
    // DA1-fenced query burst run inside run_setup() (after raw-mode enable,
    // BEFORE the EventStream above was created; see run_setup.rs). Still
    // inert: nothing gates on this until P16.3. The only wiring is this
    // `--verbose` (debug-level) boot line dumping the negotiated caps.
    tracing::debug!(caps = %term_caps.summary(), "negotiated terminal capabilities (env + DA1-fenced burst)");
    // P12.2: Option-wrapped so dispatch::handle_input_action can drop the
    // reader early (gamba terminal handoff) through a `&mut` without moving
    // it out of the loop. Always Some outside the dispatch call.
    let mut event_reader = Some(event_reader);
    // Live-MXC layer (myx theme): boot the subscriber when configured.
    loop_arms::boot_myx_live(&mut app);
    // Throttle state for idle subagent reconcile (~1s cadence in the tick arm).
    let mut last_subagent_reconcile: Option<std::time::Instant> = None;
    let mut first_frame_done = false;
    let mut idle_purge = client_diet::IdlePurge::new(matches!(mode, run_setup::TransportMode::Socket));
    loop {
        // Only draw when something actually changed. During streaming, coalesce
        // redraws to the configured frame budget (`max_fps`, default 60fps =
        // ~16ms) — deltas and the spinner arrive faster than the eye reads, and
        // building/publishing the RenderModel per frame is main-thread work
        // (it re-renders the streaming message's markdown each frame). User
        // input bypasses the cap via `force_redraw` so scroll/typing stays
        // instant, and the `!app.streaming` short-circuit renders the final/idle
        // frame immediately so end-of-turn state never lags. Tune via
        // `max_fps = 60|144|240|…` in ~/.synaps-cli/config. (Was a hardcoded
        // 100ms/10fps #131 throttle; 0.3.6 made publish O(viewport) so the cap
        // could be raised to a real frame rate without burning a core.)
        let throttle = std::time::Duration::from_millis(1000 / config.max_fps.max(1) as u64);
        if should_draw(
            app.needs_redraw,
            app.force_redraw,
            app.streaming,
            last_draw.elapsed(),
            throttle,
        ) {
            // Terminal lives on the render thread — get size via the crossterm
            // TTY syscall directly (doesn't need the Terminal object).
            // Skip the frame entirely if the reported size is 0×0 (terminal not
            // yet ready, or a transient resize event) — publishing a 0×0 model
            // would produce layout artifacts.
            let term_size = match crossterm::terminal::size() {
                Ok((w, h)) if w > 0 && h > 0 => ratatui::layout::Size {
                    width: w,
                    height: h,
                },
                _ => {
                    // Terminal not yet ready or transient resize — clear redraw
                    // flags and back off so we don't busy-spin when the size is
                    // 0×0 or the syscall fails (#tui-safety fix 1).
                    app.needs_redraw = false;
                    app.force_redraw = false;
                    last_draw = Instant::now();
                    continue;
                }
            };
            app.needs_redraw = false;
            app.force_redraw = false;
            last_draw = Instant::now();
            let built = build_render_model(
                &mut view_model::ViewInputs::from_app(&mut app),
                &**link.view(),
                &registry,
                term_size,
            );
            if let Some((model, patch)) = built {
                patch.apply(&mut app);
                render_handle.publish(model);
                if !first_frame_done {
                    first_frame_done = true;
                    agent_core::core::memstat::ladder("first_frame", &"");
                }
            }
        }
        idle_purge.observe(app.streaming || app.compacting);

        tokio::select! {

            // ── OS shutdown signals: Ctrl-C from terminal, SIGTERM from systemd/tmux/SSH ──
            signal = shutdown_signal_rx.recv() => {
                if let Some(signal) = signal {
                    tracing::info!(signal = signals::signal_label(signal), "chat UI shutdown signal received");
                    // All OS signals map to ImmediateExit (see signals.rs).
                    // The /quit command sends SpawnExitFx to the render thread
                    // and does NOT go through this path, so removing AnimatedExit
                    // from signals does not affect interactive quit.
                    let signals::ShutdownAction::ImmediateExit = signals::shutdown_action(signal);
                    tracing::info!("immediate exit on {:?}", signal);
                    // The actor cancels the in-flight turn/compaction on End.
                    // Fall through to unified bounded-teardown below the loop.
                    break;
                }
            }

            // ── Client diet: idle purge (socket client only; §4.4) ──
            _ = idle_purge.wait() => {
                idle_purge.fire();
            }

            // ── Ping results — fires when a model ping completes ──
            result = app.ping_rx.recv() => {
                loop_arms::handle_ping_arm(&mut app, result);
            }

            // ── Expanded model-list results ──
            result = app.model_list_rx.recv() => {
                loop_arms::handle_model_list_arm(&mut app, result);
            }

            // ── Async extension loader progress ──
            event = app.extension_loader_rx.recv(), if app.extension_loader_running => {
                loop_arms::handle_extension_loader_arm(&mut app, link.view(), event, ext_mgr_shared.as_ref()).await;
            }

            // ── Widget events from background extension notification watchers ──
            Some(widget_event) = app.widget_rx.recv() => {
                loop_arms::handle_widget_arm(&mut app, widget_event);
            }

            // ── Live MXC palettes (myx theme) — UI-thread apply, same path as /theme ──
            Some(myx_theme) = app.myx_theme_rx.recv() => {
                loop_arms::handle_myx_theme_arm(&mut app, myx_theme);
            }

            // ── Sidecar events — multiplexed across all hosted sidecars (Phase 8 8B) ──
            sidecar_event = self::sidecar::next_event(&mut app.sidecars) => {
                let (pid, event) = sidecar_event;
                self::sidecar::handle_event(&mut app, &pid, event);
                app.request_redraw();
            }

            // ── Sidecar non-blocking startup completion (G3, in-process only) ──
            // Socket path: the TUI does not own a SidecarManager (G Q1);
            // sidecar_starts is always empty under Socket, so this arm pends.
            (pid, result) = self::sidecar::next_startup(&mut app.sidecar_starts) => {
                self::sidecar::finish_startup(&mut app, &registry, pid, result);
                app.request_redraw();
            }

            // ── Secret-prompt answers from the pane (PromptBridge) → Answer ──
            Some((prompt_id, value)) = prompt_bridge.answers_rx.recv() => {
                prompt_bridge.on_local_answer(prompt_id);
                let _ = link.send(SessionCommand::Answer { prompt_id, value }).await;
            }

            // ── Tick: animations + spinner (~60fps when active) ──
            _ = tokio::time::sleep(std::time::Duration::from_millis(16)), if boot_fx_sent || exit_fx_sent || app.streaming || app.compacting || app.transcript.is_empty() || app.logo_dismiss_t.is_some() || app.logo_build_t.is_some() || app.gamba_child.is_some() || app.secret_prompts.is_active() || !app.toasts.is_empty() || app.plugins.as_ref().is_some_and(|p| p.is_install_active()) || !app.subagents.is_empty() || app.theme_transition.is_some() => {
                if loop_arms::handle_animation_tick(
                    &mut app, &config, &registry, &render_handle,
                    &secret_prompt_rx, &boot_done, &exit_done,
                    &mut boot_fx_sent, exit_fx_sent,
                    &mut last_subagent_reconcile,
                )
                .await
                {
                    break;
                }
            }

            // ── Input: keyboard, mouse, paste ──
            maybe_event = event_reader.as_mut().expect("event_reader is always Some outside dispatch").next(), if app.gamba_child.is_none() => {
                match maybe_event {
                    Some(Ok(event)) => {
                        // P7.8: the secret-prompt interception is gone — SecretPrompt
                        // is a stack-routed pane (`route_secret_prompt`), dispatched
                        // below by `input::handle_event` on `modal_stack.top()`.
                        let is_streaming = app.streaming;
                        // Scope the registry read guard to this block so it is
                        // provably released before any later `.await`
                        // (clippy::await_holding_lock) — the guard never spans a
                        // yield point.
                        let action = {
                            let kb_guard = keybind_registry.read().expect("keybind registry poisoned");
                            input::handle_event(event, &mut app, &**link.view(), is_streaming, &registry, &kb_guard, config.scroll_lines.unwrap_or(3))
                        };
                        // Input events (keys, mouse, paste, resize) almost always
                        // change visible state (cursor, input buffer, scroll) and
                        // must feel instant — bypass the streaming redraw throttle.
                        app.request_immediate_redraw();
                        // P12.2: the ~1,300-line InputAction dispatch match moved
                        // verbatim to dispatch::handle_input_action (dispatch.rs).
                        // LoopState lends exactly the loop-locals the match
                        // touched; Break maps to the outer `break` (unused today,
                        // honored anyway), Continue to the old fall-through.
                        let state = dispatch::LoopState {
                            app: &mut app,
                            link: &mut link,
                            http: &http,
                            config: &mut config,
                            registry: &registry,
                            keybind_registry: &keybind_registry,
                            system_prompt_path: &system_prompt_path,
                            render_handle: &render_handle,
                            event_reader: &mut event_reader,
                            ext_mgr_shared: ext_mgr_shared.as_ref(),
                            exit_fx_sent: &mut exit_fx_sent,
                            is_socket: matches!(mode, run_setup::TransportMode::Socket),
                        };
                        if dispatch::handle_input_action(action, state).await.is_break() {
                            break;
                        }
                    }
                    // FIX C (defense in depth): EventStream yields Err or None when
                    // crossterm detects the PTY is gone. Break cleanly here.
                    // NOTE: on some kernels crossterm's EPOLL loop can spin without ever
                    // yielding Err/None on a dead PTY (the confirmed busy-loop bug). The
                    // render thread's I/O error path is the backstop: it logs the error
                    // and keeps rendering until the main loop tears down (does NOT break
                    // the render loop on a single I/O error).
                    Some(Err(_)) | None => break,
                }
            }

            // ── Session envelopes: stream events + every actor notification
            // (PLAN-phase3 §2.4). `None` = the actor is gone (in-process) or
            // the socket closed (reconnect flow, A4).
            maybe_env = link.next_event() => {
                match maybe_env {
                    Some(env) => {
                        if let stream_handler::ArmFlow::Ended = stream_handler::handle_session_event_arm(
                            env, &mut app, &mut link, &registry, &render_handle,
                            &mut prompt_bridge, ext_mgr_shared.as_ref(),
                        ).await {
                            break;
                        }
                    }
                    None => {
                        if !run_setup::try_reconnect(&mut app, &mut link, &mode, &render_handle, &registry).await {
                            break;
                        }
                    }
                }
            }
        }
    }

    // Stop the live-MXC subscriber FIRST — no background task writes past here.
    loop_arms::abort_myx_live(&mut app);

    // ── PART 2: Bounded teardown — the actor saves, fires on_session_end
    // and flushes observability under its own budgets (`SessionActor::
    // finish`); we ask for it and wait for `Ended` within the sum of those
    // budgets plus margin (`SESSION_END_TIMEOUT_SECS`). The channel closing
    // cleanly before `Ended` is observed is a clean exit too (exit 0); only
    // an actor still running past its whole budget is an emergency exit.
    // Over the socket the session lives on: Detach.
    let teardown = std::time::Duration::from_secs(signals::SESSION_END_TIMEOUT_SECS);
    if !link.is_closed() {
        let cmd = match mode {
            run_setup::TransportMode::Local { .. } => SessionCommand::End {
                reason: EndReason::ClientQuit,
            },
            run_setup::TransportMode::Socket => SessionCommand::Detach {
                client: link.client_id(),
            },
        };
        let _ = link.send(cmd).await;
        agent_core::core::memstat::ladder("detach", &"");
        if let run_setup::TransportMode::Local { .. } = mode {
            match tokio::time::timeout(teardown, link.wait_ended()).await {
                Ok(true) => tracing::debug!("clean teardown completed"),
                Ok(false) => {
                    tracing::debug!("session channel closed before Ended — clean exit")
                }
                Err(_elapsed) => {
                    tracing::warn!(
                        budget_secs = signals::SESSION_END_TIMEOUT_SECS,
                        "session end timed out — data may be incomplete"
                    );
                    lifecycle::emergency_exit();
                }
            }
        }
    }

    // Let extension shutdown continue in the background; exit should not hang on
    // extension post/session-end cleanup or slow child-process teardown.
    let _extension_shutdown = ext_mgr_shared.as_ref().map(|m| {
        synaps_cli::extensions::manager::ExtensionManager::shutdown_all_detached(
            std::sync::Arc::clone(m),
        )
    });
    // Stop the signal-listener thread (signal-hook handle, not a JoinHandle).
    shutdown_signal_task.close();

    // ── Render-thread teardown ───────────────────────────────────────────────
    //
    // The render thread owns the Terminal.  We send it a Teardown command and
    // wait for the ack within the combined SAVE + HOOKS budget already spent
    // above.  If the ack doesn't arrive the thread is wedged (dead PTY); we
    // skip the join and let process exit reap it — see RenderHandle::teardown.
    // This self-bounding teardown replaced the old signal watchdog (#116).
    //
    // The render thread's do_teardown() calls emergency_teardown_terminal()
    // (disable_raw_mode + LeaveAlternateScreen + etc.) and show_cursor(), then
    // sends the ack and exits its loop.  The Terminal is dropped when the
    // thread exits — that's safe because crossterm teardown was already done.
    let teardown_budget = std::time::Duration::from_secs(
        signals::TEARDOWN_TIMEOUT_SECS.saturating_sub(signals::SAVE_TIMEOUT_SECS),
    )
    .max(std::time::Duration::from_secs(2));
    let acked = render_handle.teardown(teardown_budget);
    if !acked {
        tracing::warn!("render thread did not ack teardown within budget — watchdog is backstop");
        // emergency_teardown_terminal is a no-op if the terminal is already
        // restored, so calling it here is safe even if the render thread did
        // eventually finish teardown after the timeout.
        lifecycle::emergency_teardown_terminal();
    }

    // ── F9: daemon-lost exit — stderr message + non-zero code ──
    if let Some(lost) = app.daemon_lost {
        eprintln!(
            "synaps: lost the daemon (pid {}) and could not reconnect within {} s \
             — session {}; resume with synaps --attach {} / --continue {}",
            lost.pid, lost.budget_secs, lost.session_id, lost.session_id, lost.session_id,
        );
        std::process::exit(agent_engine::daemon::EXIT_DAEMON_LOST);
    }

    Ok(())
}