kcode-k1-chat-thread-session-inference-settlement 0.1.0

#![forbid(unsafe_code)]
#![doc = include_str!("../Documentation.md")]

use kcode_k1_chat_model_usage_session::ModelUsageSession;
use kcode_k1_chat_thread_actor_channel::{ActorShim, BoxValue};
use kcode_k1_chat_thread_durable_state::DurableThread;
use kcode_k1_chat_thread_rust_code_session::{PersistCompletion, RustCodeSession};
use kcode_k1_chat_thread_session_provider::SessionProvider;
use kcode_k1_chat_thread_web_search_tasks::WebSearchTasks;
use kcode_k1_codex_adapter::ShimOutput;

pub struct InferenceSettlement {
    stop: bool,
    stage_error: Option<String>,
}

impl InferenceSettlement {
    pub fn should_stop(&self) -> bool {
        self.stop
    }

    pub fn into_stage_error(self) -> Option<String> {
        self.stage_error
    }
}

#[allow(clippy::too_many_arguments)]
pub async fn settle_inference(
    durable: &mut DurableThread,
    provider: &mut SessionProvider,
    usage: &mut ModelUsageSession,
    searches: &mut WebSearchTasks,
    mut rust_code: Option<&mut RustCodeSession>,
    job: u64,
    shim: ActorShim,
    result: Result<ShimOutput<BoxValue>, String>,
) -> Result<InferenceSettlement, String> {
    provider.accept_inferred(job)?;
    let key = provider.active_key().to_owned();
    match result {
        Err(error) => {
            searches.abort();
            if let Some(rust) = rust_code.as_deref_mut() {
                rust.abort();
            }
            let stage_error = error.clone();
            durable.fail(job, error, true);
            if let Some(rust) = rust_code.as_deref_mut() {
                rust.clear_authorization_mirror();
            }
            provider.settle_failure();
            let stop = usage.finish_inference(durable, &key, None).await.is_err();
            Ok(InferenceSettlement {
                stop,
                stage_error: (!stop).then_some(stage_error),
            })
        }
        Ok(output) => {
            let active_without_completion = rust_code
                .as_ref()
                .is_some_and(|rust| rust.is_busy() && !rust.has_completion());
            let (resume, terminal) = durable.complete_with_terminal_response(job, output)?;
            if rust_code.as_ref().is_some_and(|rust| rust.has_completion()) {
                let outcome = rust_code
                    .as_deref_mut()
                    .expect("completion requires Rust support")
                    .persist_completion(durable, job)?;
                if !matches!(outcome, PersistCompletion::Committed(None)) {
                    return Err(
                        "Rust code completion did not commit at terminal boundary".to_owned()
                    );
                }
            }
            if active_without_completion {
                return Err("Codex inference completed while Rust code work remains".to_owned());
            }
            if rust_code
                .as_ref()
                .is_some_and(|rust| rust.has_completion() || rust.is_busy())
            {
                return Err("Rust code work restarted at terminal boundary".to_owned());
            }
            if usage
                .finish_inference(durable, &key, Some(terminal))
                .await
                .is_err()
            {
                return Ok(InferenceSettlement {
                    stop: true,
                    stage_error: None,
                });
            }
            provider.settle_success(shim);
            if !resume && !searches.is_busy() {
                if let Some(rust) = rust_code {
                    rust.clear_authorization(durable);
                } else {
                    durable.clear_authorization();
                }
            }
            Ok(InferenceSettlement {
                stop: false,
                stage_error: None,
            })
        }
    }
}