trusty-mpm 1.0.2

//! The production [`SessionControl`] impl over the daemon's managed surface.
//!
//! Why: the SM-STDIO adapter (DOC-14 §1A.1) and the SM-8 delegation loop both
//! drive sessions through the narrow [`SessionControl`] trait (now defined in
//! `core::sm::control` so the agent-side loop can depend on it too). This file
//! holds the PRODUCTION impl: an in-process bridge onto the daemon's existing
//! managed-session control surface (§2.6) — the SAME code `tm ticket`/the HTTP
//! `…/managed/*` routes use. Keeping it here (not in core) is deliberate: it
//! needs daemon-internal handles (`DaemonState`, `spawn_managed`, …) that core
//! must not depend on. The trait + input/error types are re-exported from this
//! module so `sm_stdio`'s public surface (`pub use control::{…}`) is unchanged.
//! What: [`DaemonSessionControl`] delegates each verb to the in-process
//! [`crate::session_manager::SessionManager`] + [`spawn_managed`]/[`resume_managed`]
//! (so the stdio path and the HTTP path cannot diverge). The trait, [`LaunchParams`],
//! and [`SessionControlError`] are re-exported from [`crate::core::sm::control`].
//! Test: `DaemonSessionControl` is exercised by the daemon's managed-session
//! integration tests (it forwards to the same helpers those cover); the
//! dispatcher's `sm.sessions.*` round-trips use the `tests.rs` mock.

use std::sync::Arc;

use async_trait::async_trait;

// Re-export the relocated trait + types so `sm_stdio`'s public surface
// (`pub use control::{DaemonSessionControl, LaunchParams, SessionControl,
// SessionControlError}`) is unchanged after the SM-8 move to core.
use crate::activity::cache::ActivityState;
pub use crate::core::sm::control::{
    LaunchParams, RawObservation, SessionControl, SessionControlError, Submit, Summary,
};

use crate::daemon::managed_routes::{SpawnParams, record_to_json, resume_managed, spawn_managed};
use crate::daemon::state::DaemonState;
use crate::session_manager::{ManagedError, ManagedSessionId};

/// Production [`SessionControl`] over the in-process managed-session surface.
///
/// Why: the SM runs IN the daemon, so the spec's "delegate to t-mpm's
/// session-manager" is a direct in-process call to the SAME helpers the HTTP
/// `…/managed/*` routes use ([`spawn_managed`]/[`resume_managed`] +
/// [`crate::session_manager::SessionManager`]). Calling them directly (rather
/// than looping back over HTTP) keeps one code path and means the stdio surface
/// inherits every fix to the managed surface for free.
/// What: holds the shared `Arc<DaemonState>` and forwards each verb to its
/// managed-surface counterpart, returning the same flat JSON the HTTP routes do
/// (via [`record_to_json`]).
/// Test: forwards to helpers covered by the managed integration tests; the
/// dispatcher round-trips use the `tests.rs` mock instead.
pub struct DaemonSessionControl {
    /// Shared daemon state holding the managed [`crate::session_manager::SessionManager`].
    state: Arc<DaemonState>,
}

impl DaemonSessionControl {
    /// Build the production control over the daemon's shared state.
    ///
    /// Why: the stdio entry point constructs this once from the daemon state so
    /// every `sm.sessions.*` call reuses the one live session manager.
    /// What: stores the `Arc<DaemonState>`.
    /// Test: construction is trivial; behaviour is covered by the managed tests.
    pub fn new(state: Arc<DaemonState>) -> Self {
        Self { state }
    }

    /// Parse + validate a managed session id string.
    ///
    /// Why: an invalid UUID must become a graceful `NotFound` (→ JSON-RPC error)
    /// rather than a panic, mirroring the HTTP route's 400/404 handling.
    /// What: parses the string into a [`ManagedSessionId`], mapping failure to
    /// [`SessionControlError::NotFound`].
    /// Test: covered by the managed integration tests.
    fn parse_id(session_id: &str) -> Result<ManagedSessionId, SessionControlError> {
        session_id
            .parse::<uuid::Uuid>()
            .map(ManagedSessionId::from)
            .map_err(|_| SessionControlError::NotFound(session_id.to_string()))
    }

    /// Map a manager [`ManagedError`] onto the control error class.
    ///
    /// Why: a post-parse operation failure must preserve the not-found-vs-backend
    /// distinction so the dispatcher picks the right JSON-RPC code. Reserving
    /// [`SessionControlError::NotFound`] for the genuinely-absent session (and the
    /// UUID-parse failure in [`Self::parse_id`]) — and routing every OTHER manager
    /// failure (tmux, store, invalid-state, I/O) to
    /// [`SessionControlError::Backend`] (`-32603`) — keeps `get`/`stop`/`kill`
    /// consistent with `send`/`resume`, which already surface backend failures as
    /// `Backend`.
    /// What: `ManagedError::SessionNotFound` → `NotFound`; every other variant →
    /// `Backend(e.to_string())`.
    /// Test: `tests.rs::stop_backend_failure_is_backend_not_found` and
    /// `kill_backend_failure_is_backend_not_found`.
    fn map_managed_err(e: ManagedError) -> SessionControlError {
        match e {
            ManagedError::SessionNotFound(msg) => SessionControlError::NotFound(msg),
            other => SessionControlError::Backend(other.to_string()),
        }
    }
}

#[async_trait]
impl SessionControl for DaemonSessionControl {
    /// Launch via the shared [`spawn_managed`] flow (provision → tmux → harness).
    ///
    /// Why: the spec maps `sm.sessions.launch` onto `POST /sessions`, whose
    /// engine is [`spawn_managed`]. Forwarding here keeps the adapter a thin
    /// mapping with zero provisioning logic of its own.
    /// What: maps `workdir → repo_url` (unless an explicit `repo_url` was
    /// supplied — WI-A #1585 — in which case that takes precedence), `prompt →
    /// task` (defaulting to a generic description when absent), `model →
    /// runtime`, and `ref_ → git_ref` (WI-A #1585; empty string when absent).
    /// A blank `git_ref` is explicitly handled by `RealGitBackend::worktree_add`
    /// which falls back to fetching `HEAD` (the remote's default branch
    /// pointer) instead of an empty, invalid ref name — see
    /// `provisioner::workspace::blank_git_ref_omits_branch_flag`
    /// for the contract test. Returns `{ session_id }`. The `goal_id` link is
    /// recorded by the caller via the goal store (§9.3), not here, so this
    /// stays purely session-control.
    /// Test: forwards to `spawn_managed` (managed integration tests); the
    /// repo_url/ref_ threading is covered by
    /// `chat_action_tests.rs::execute_launch_threads_repo_url_and_ref_`.
    async fn launch(&self, params: LaunchParams) -> Result<serde_json::Value, SessionControlError> {
        let task = params
            .prompt
            .filter(|p| !p.trim().is_empty())
            .unwrap_or_else(|| "session-manager launched task".to_string());
        // WI-A #1585: an explicit `repo_url` in LaunchParams takes precedence
        // over `workdir` for provisioning; `workdir` is used as the fallback
        // (local-path fast-path or legacy callers that encode the URL there).
        let repo_url = params.repo_url.unwrap_or(params.workdir);
        let git_ref = params.ref_.unwrap_or_default();
        let spawn = SpawnParams {
            repo_url,
            git_ref,
            task,
            name_hint: None,
            runtime: params.model,
            ephemeral: params.ephemeral,
            // `sm.sessions.launch` is the SM-STDIO adapter (a distinct DOC-14
            // subsystem, not the standard MCP tool surface) — never subject to
            // the MCP spawn gate (#1836/#1837), matching `tm launch`/`tm ticket`.
            mcp_initiated: false,
            // Turnkey by default (#1903/#1299): the SM driver launches to work.
            inject_task: None,
            // The SM-STDIO adapter does not expose Deliverable linkage
            // (#2379's CLI surface is `tm sessions new --deliverable`, HTTP-only).
            deliverable_id: None,
            // Keep the #1707 reconnect (#2450): the SM-STDIO adapter is a
            // programmatic driver; an idempotent reconnect for a project that
            // already has a live session is the safe default here too.
            force_new: false,
        };
        let record = spawn_managed(
            &self.state,
            crate::session_manager::ManagedSessionId::new(),
            spawn,
        )
        .await
        .map_err(SessionControlError::Backend)?;
        Ok(serde_json::json!({ "session_id": record.id.to_string() }))
    }

    /// List all managed sessions as `{ sessions: [record, …] }`.
    async fn list(&self) -> Result<serde_json::Value, SessionControlError> {
        let mgr = self.state.session_manager().await;
        let sessions: Vec<serde_json::Value> =
            mgr.list().await.iter().map(record_to_json).collect();
        Ok(serde_json::json!({ "sessions": sessions }))
    }

    /// Get one session record (the flat managed JSON).
    async fn get(&self, session_id: &str) -> Result<serde_json::Value, SessionControlError> {
        let id = Self::parse_id(session_id)?;
        let mgr = self.state.session_manager().await;
        let record = mgr.get(&id).await.map_err(Self::map_managed_err)?;
        Ok(serde_json::json!({ "session": record_to_json(&record) }))
    }

    /// Inject text into the session pane; returns `{ ok: true }`.
    async fn send(
        &self,
        session_id: &str,
        text: &str,
    ) -> Result<serde_json::Value, SessionControlError> {
        let id = Self::parse_id(session_id)?;
        let mgr = self.state.session_manager().await;
        mgr.send_input(&id, text)
            .await
            .map_err(|e| SessionControlError::Backend(e.to_string()))?;
        Ok(serde_json::json!({ "ok": true }))
    }

    /// Stop the runtime, keeping the workspace; returns `{ ok: true }`.
    async fn stop(&self, session_id: &str) -> Result<serde_json::Value, SessionControlError> {
        let id = Self::parse_id(session_id)?;
        let mgr = self.state.session_manager().await;
        mgr.stop(&id).await.map_err(Self::map_managed_err)?;
        Ok(serde_json::json!({ "ok": true }))
    }

    /// Resume a stopped session and re-spawn its runtime; returns `{ ok: true }`.
    async fn resume(&self, session_id: &str) -> Result<serde_json::Value, SessionControlError> {
        let id = Self::parse_id(session_id)?;
        resume_managed(&self.state, &id)
            .await
            .map_err(|e| SessionControlError::Backend(e.to_string()))?;
        Ok(serde_json::json!({ "ok": true }))
    }

    /// Force-stop / reap a session (decommission — terminal teardown).
    ///
    /// Why: `sm.sessions.kill` is the force-stop/reap verb (§1A.1 maps it to the
    /// `DELETE /sessions/{id}` + `/sessions/dead` reap path). The strongest
    /// in-process equivalent is `decommission` (kills runtime + tombstones the
    /// record); a plain `stop` would leave a resumable session, not a reaped one.
    /// What: forwards to `SessionManager::decommission`; returns `{ ok: true }`.
    /// Test: forwards to `decommission` (managed integration tests).
    async fn kill(&self, session_id: &str) -> Result<serde_json::Value, SessionControlError> {
        let id = Self::parse_id(session_id)?;
        let mgr = self.state.session_manager().await;
        mgr.decommission(&id, None)
            .await
            .map_err(Self::map_managed_err)?;
        Ok(serde_json::json!({ "ok": true }))
    }

    /// Inject text via the manager, dispatched per [`Submit`] (#1461).
    ///
    /// Why: the production wiring of the harness-agnostic write verb. It forwards
    /// to [`SessionManager::inject`], which dispatches the keystroke intent onto
    /// the real tmux driver (literal+Enter / literal / C-c).
    /// What: parses the id, then calls `inject`, mapping a manager failure onto
    /// `Backend` (the pane/tmux failure class).
    /// Test: forwards to `SessionManager::inject` (covered by the inject-dispatch
    /// tests against a recording driver in tests/session_control_api.rs).
    async fn inject_text(
        &self,
        session_id: &str,
        text: &str,
        submit: Submit,
    ) -> Result<(), SessionControlError> {
        let id = Self::parse_id(session_id)?;
        let mgr = self.state.session_manager().await;
        mgr.inject(&id, text, submit)
            .await
            .map_err(|e| SessionControlError::Backend(e.to_string()))
    }

    /// Observe the session's raw surface — LLM-FREE (#1461).
    ///
    /// Why: the production wiring of the always-available read verb. It forwards
    /// to [`SessionManager::observe`], which never touches the LLM.
    /// What: parses the id and returns the [`RawObservation`] (pane + liveness +
    /// pending fields). `NotFound` is preserved for a genuinely-absent session.
    /// Test: `observe_returns_raw_pane_without_llm`, `observe_reports_runtime_active`.
    async fn observe(
        &self,
        session_id: &str,
        lines: usize,
    ) -> Result<RawObservation, SessionControlError> {
        let id = Self::parse_id(session_id)?;
        let mgr = self.state.session_manager().await;
        mgr.observe(&id, lines).await.map_err(Self::map_managed_err)
    }

    /// Summarize the session via the activity monitor — LLM-OPTIONAL (#1461).
    ///
    /// Why: the production wiring of the optional inference verb. It reuses the
    /// SAME shared [`crate::activity::monitor::ActivityMonitor`] the `/activity`
    /// route uses, so the content-hash cache and the missing-key degrade are
    /// inherited verbatim — repeated polls on unchanged panes are cheap, and an
    /// unconfigured host returns `Unknown`/`None` instead of erroring.
    /// What: captures the pane (LLM-free), runs `ActivityMonitor::check` (which
    /// converts `MissingApiKey` to an `Unknown` verdict non-erroring), and maps
    /// the verdict onto a [`Summary`] — dropping the placeholder summary text to
    /// `None` whenever the state is `Unknown` (degraded), per the LLM-optional
    /// contract.
    /// Test: `summarize_degrades_to_unknown_without_key`, `summarize_returns_fake_verdict`,
    /// `summarize_serves_cached_verdict` (the last two via a fake-classifier monitor).
    async fn summarize(&self, session_id: &str) -> Result<Summary, SessionControlError> {
        let id = Self::parse_id(session_id)?;
        let mgr = self.state.session_manager().await;
        // Capture is LLM-free and tolerant of a gone pane (empty string).
        let pane_text = mgr.capture_pane(&id, 60).await.unwrap_or_default();
        let monitor = self.state.activity_monitor();
        // `check` already degrades MissingApiKey → Unknown verdict (no error).
        let result = monitor
            .check(session_id, &pane_text)
            .await
            .map_err(|e| SessionControlError::Backend(e.to_string()))?;
        Ok(verdict_to_summary(result.verdict))
    }

    /// Adopt an existing tmux session via the in-process manager (#1433).
    ///
    /// Why: the production wiring of the explicit-adopt verb. It forwards to
    /// [`crate::session_manager::SessionManager::adopt_existing`] so the stdio /
    /// action-loop path and the HTTP `…/managed/adopt` route share one code path.
    /// What: resolves an optional runtime selector (a bad value → `Backend`), then
    /// adopts the named pane with the supplied `cwd`/`task`/`runtime`. Maps the
    /// manager's `TmuxSessionMissing` to `NotFound` (no such pane) and every other
    /// failure (already-adopted, store) to `Backend`. Returns `{ session_id }`.
    /// Test: forwards to `adopt_existing` (covered by the manager unit tests); the
    /// action-loop dispatch is covered by `chat_action_tests.rs`.
    async fn adopt(
        &self,
        tmux_name: &str,
        cwd: &str,
        task: Option<&str>,
        runtime: Option<&str>,
    ) -> Result<serde_json::Value, SessionControlError> {
        let runtime_kind = match runtime {
            None => crate::runtime::RuntimeKind::default(),
            Some(raw) => raw
                .parse::<crate::runtime::RuntimeKind>()
                .map_err(|e| SessionControlError::Backend(e.to_string()))?,
        };
        let mgr = self.state.session_manager().await;
        let record = mgr
            .adopt_existing(
                tmux_name,
                std::path::PathBuf::from(cwd),
                task.unwrap_or_default().to_string(),
                runtime_kind,
                // Chat/action-loop adoptions are durable operator sessions, never
                // ephemeral — they must not be auto-reaped (#1508).
                false,
            )
            .await
            .map_err(|e| match e {
                ManagedError::TmuxSessionMissing(msg) => SessionControlError::NotFound(msg),
                other => SessionControlError::Backend(other.to_string()),
            })?;
        Ok(serde_json::json!({ "session_id": record.id.to_string() }))
    }
}

/// Map an [`crate::activity::cache::ActivityVerdict`] onto a [`Summary`] (#1461).
///
/// Why: the LLM-optional contract says a degraded (`Unknown`) verdict must carry
/// `summary = None` — the placeholder text ("OPENROUTER_API_KEY not configured")
/// is NOT a real summary. Centralising the mapping keeps that rule in one place
/// and mirrors the activity sidecar, which also never stores an `Unknown` summary.
/// What: copies `state`/`confidence`; sets `summary = Some(text)` only when the
/// state is anything other than `Unknown`.
/// Test: `summarize_degrades_to_unknown_without_key` (None) and
/// `summarize_returns_fake_verdict` (Some) in tests/session_control_api.rs.
fn verdict_to_summary(verdict: crate::activity::cache::ActivityVerdict) -> Summary {
    let summary = if verdict.state == ActivityState::Unknown {
        None
    } else {
        Some(verdict.summary)
    };
    Summary {
        state: verdict.state,
        summary,
        confidence: verdict.confidence,
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::activity::cache::ActivityVerdict;

    #[test]
    fn verdict_to_summary_drops_unknown_summary_to_none() {
        // The degraded placeholder (Unknown + "OPENROUTER_API_KEY not configured")
        // must map to summary=None so the LLM-optional contract holds.
        let v = ActivityVerdict {
            state: ActivityState::Unknown,
            summary: "OPENROUTER_API_KEY not configured".into(),
            confidence: 0.0,
        };
        let s = verdict_to_summary(v);
        assert_eq!(s.state, ActivityState::Unknown);
        assert_eq!(s.summary, None);
        assert_eq!(s.confidence, 0.0);
    }

    #[test]
    fn verdict_to_summary_keeps_real_summary() {
        // A genuine (non-Unknown) verdict keeps its summary text and confidence.
        let v = ActivityVerdict {
            state: ActivityState::Working,
            summary: "writing code".into(),
            confidence: 0.87,
        };
        let s = verdict_to_summary(v);
        assert_eq!(s.state, ActivityState::Working);
        assert_eq!(s.summary.as_deref(), Some("writing code"));
        // Approx comparison: `confidence` is an f64 carried through the verdict,
        // so an exact `==` is fragile to float representation. 1e-6 is far
        // tighter than any meaningful confidence delta.
        assert!((s.confidence - 0.87).abs() < 1e-6);
    }
}