//! The notice for an approval that `brokerd` did not bring: posted only when it has not arrived
//! within the wait (M4b spec, section 7). Do not edit.

#[path = "support/fake_loop.rs"]
mod fake_loop;
#[path = "support/tmp.rs"]
mod tmp;

use std::sync::Mutex;
use std::time::{Duration, Instant};

use fake_loop::{done, event, serve_loop};
use gatewayd::deliver::{Notice, Poster, deliver};
use gatewayd::mm::MmError;
use gatewayd::sessions::{Batch, Thread};
use proto::{SessionId, Timestamp, TurnEvent};
use tmp::TempDir;

const DM: &str = "d0000000000000000000000000";
const ROOT: &str = "r0000000000000000000000000";
const NOTICE: &str =
    "waiting for approval 42: brokerd has not sent it here; answer it with bxctl approvals";

#[derive(Default)]
struct Record(Mutex<Vec<String>>);

impl Poster for Record {
    fn post(&self, _: &str, _: &str, text: &str) -> Result<(), MmError> {
        self.0.lock().unwrap().push(text.to_string());
        Ok(())
    }
}

/// A turn whose loop says approval 42 is pending, then answers; what was posted, and how long it took.
fn turn(tag: &str, posted: &dyn Fn(u64) -> bool, wait: Duration) -> (Vec<String>, Duration) {
    let dir = TempDir::new(tag);
    let socket = dir.path().join("loop.sock");
    let expires = Timestamp::parse("2026-09-24T08:20:00.000Z").unwrap();
    let _turns = serve_loop(&socket, move |_, _| {
        vec![
            event(TurnEvent::ApprovalPending {
                approval: 42,
                tool: "read_file".to_string(),
                expires,
            }),
            done("done"),
        ]
    });
    let batch = Batch {
        session: SessionId::new(&format!("mm-{ROOT}")).unwrap(),
        thread: Thread {
            channel: DM.to_string(),
            root: ROOT.to_string(),
        },
        resume: false,
        text: "go".to_string(),
    };
    let poster = Record::default();
    let started = Instant::now();
    deliver(&poster, &socket, &batch, &|_| {}, &Notice { posted, wait });
    let took = started.elapsed();
    (poster.0.into_inner().unwrap(), took)
}

#[test]
fn brought_already_no_notice_and_no_wait() {
    let (posts, took) = turn("notice-there", &|id| id == 42, Duration::from_secs(5));
    assert_eq!(posts, ["done"]);
    assert!(took < Duration::from_secs(1), "{took:?}");
}

#[test]
fn brought_during_the_wait_no_notice() {
    let started = Instant::now();
    let later = move |id: u64| id == 42 && started.elapsed() > Duration::from_millis(300);
    let (posts, took) = turn("notice-later", &later, Duration::from_secs(5));
    assert_eq!(posts, ["done"]);
    assert!(took < Duration::from_secs(2), "{took:?}");
}

#[test]
fn never_brought_the_notice_after_the_wait() {
    let (posts, took) = turn("notice-never", &|_| false, Duration::from_millis(400));
    assert_eq!(posts, [NOTICE, "done"]);
    assert!(
        took >= Duration::from_millis(400) && took < Duration::from_secs(3),
        "{took:?}"
    );
}

#[test]
fn another_approval_brought_does_not_count() {
    let (posts, _) = turn("notice-other", &|id| id == 7, Duration::from_millis(200));
    assert_eq!(posts, [NOTICE, "done"]);
}