//! P3 exit scenario across worker, check, and recorded fast-forward SIGKILL boundaries.
use crate::common::copy_tree;
use sausage::{harness::run_module, world::World};
use std::{
    path::Path,
    process::Command,
    time::{Duration, Instant},
};
const BUNDLE: &str = include_str!("../../js/p3-test-bundle.js");
fn git(repo: &Path, args: &[&str]) -> anyhow::Result<String> {
    let output = Command::new("git")
        .args(args)
        .current_dir(repo)
        .env("GIT_AUTHOR_NAME", "Test")
        .env("GIT_AUTHOR_EMAIL", "test@example.com")
        .env("GIT_COMMITTER_NAME", "Test")
        .env("GIT_COMMITTER_EMAIL", "test@example.com")
        .output()?;
    anyhow::ensure!(
        output.status.success(),
        "git {args:?}: {}",
        String::from_utf8_lossy(&output.stderr)
    );
    Ok(String::from_utf8(output.stdout)?.trim().into())
}
fn prepare(dir: &Path, all_extensions: bool) -> anyhow::Result<()> {
    World::open(dir)?;
    let disk = dir.join("world");
    let repo = disk.join("src/sausage");
    let source = Path::new(env!("CARGO_MANIFEST_DIR")).join("..");
    let target = crate::common::build_git();
    std::fs::create_dir_all(disk.join("bin"))?;
    for binary in ["git", "tar"] {
        std::fs::copy(
            target.join(format!("wasm32-wasip2/release/{binary}.wasm")),
            disk.join(format!("bin/{binary}.wasm")),
        )?;
    }
    if !target.join("wasm32-wasip2/release/brush.wasm").exists() {
        anyhow::ensure!(
            crate::common::build_brush()?.success(),
            "brush build failed"
        );
    }
    std::fs::copy(
        target.join("wasm32-wasip2/release/brush.wasm"),
        disk.join("bin/sh.wasm"),
    )?;
    if all_extensions {
        copy_tree(&source.join("extensions"), &repo.join("extensions"))?;
    } else {
        for extension in ["subagents", "models", "core"] {
            copy_tree(
                &source.join("extensions").join(extension),
                &repo.join("extensions").join(extension),
            )?;
        }
    }
    std::fs::create_dir_all(repo.join("extensions/probe"))?;
    std::fs::write(
        repo.join("extensions/probe/server.ts"),
        "export default host => { globalThis.p3Models=host.need({name:'models'}); globalThis.p3Subagents=host.need({name:'subagents'}); globalThis.p3Workspaces=host.need({name:'workspaces'}); globalThis.p3Host=host; return {name:'probe'}; }",
    )?;
    let roster: Vec<serde_json::Value> = ["mainAgent", "coordinator", "worker", "reviewer"].into_iter().map(|role| serde_json::json!({
        "name":role, "description":format!("P3 {role}"), "model":"faux/faux-1",
        "isolate":"none", "resident":role == "mainAgent", "prompt":format!("P3 role:{role}"),
        "denyTools":if role == "worker" || role == "reviewer" {vec!["subagent"]} else {vec![]}
    })).collect();
    crate::common::write_config(dir, "mainAgent", serde_json::json!(roster))?;
    std::fs::write(
        repo.join("settings.json"),
        r#"{"lander":{"checks":["sh -c ': > /check-running; until test -f /check-release; do :; done; test -f feature.txt'"]}}"#,
    )?;
    let demo = disk.join("src/demo");
    std::fs::create_dir_all(&demo)?;
    std::fs::write(demo.join("README.md"), "P3 demo\n")?;
    for repo in [&repo, &demo] {
        git(repo, &["init", "-b", "main"])?;
        git(repo, &["config", "user.name", "Test"])?;
        git(repo, &["config", "user.email", "test@example.com"])?;
        git(repo, &["add", "."])?;
        git(repo, &["commit", "--no-gpg-sign", "-m", "P3 fixture"])?;
    }
    Ok(())
}
async fn run(dir: &Path, mode: &str) -> anyhow::Result<()> {
    let world = World::open(dir)?;
    let exec = sausage::process::exec(World {
        root: world.root.clone(),
        host_dir: world.host_dir.clone(),
        processes: world.processes.clone(),
    })?;
    run_module(
        world,
        exec,
        &format!("globalThis.p3Mode={mode:?};\n{BUNDLE}"),
    )
    .await
}
#[tokio::test(flavor = "current_thread")]
async fn scripted_model_replays() -> anyhow::Result<()> {
    let dir = tempfile::tempdir()?;
    run(dir.path(), "unit").await
}
#[tokio::test(flavor = "current_thread")]
async fn all_extensions_load() -> anyhow::Result<()> {
    let dir = tempfile::tempdir()?;
    prepare(dir.path(), true)?;
    run(dir.path(), "load-all").await
}
#[tokio::test(flavor = "current_thread")]
async fn branch_round_trip() -> anyhow::Result<()> {
    let dir = tempfile::tempdir()?;
    prepare(dir.path(), true)?;
    run(dir.path(), "branch").await?;
    run(dir.path(), "branch-resume").await
}
#[tokio::test(flavor = "current_thread")]
async fn restart_child() -> anyhow::Result<()> {
    if let Ok(dir) = std::env::var("P3_DIR") {
        run(Path::new(&dir), &std::env::var("P3_MODE")?).await?;
    }
    Ok(())
}
fn recovery(point: &str) -> anyhow::Result<()> {
    let dir = tempfile::tempdir()?;
    prepare(dir.path(), true)?;
    if point != "check" {
        std::fs::write(dir.path().join("world/check-release"), "yes")?;
    }
    let spawn = |mode: &str| {
        Command::new(std::env::current_exe().unwrap())
            .args(["--exact", "p3::restart_child", "--nocapture"])
            .env("P3_DIR", dir.path())
            .env("P3_MODE", mode)
            .spawn()
    };
    let mut child = spawn(&format!("kill-{point}"))?;
    let marker = match point {
        "worker" => "worker-running",
        "check" => "check-running",
        "forward" => "forward-recorded",
        _ => unreachable!(),
    };
    let deadline = Instant::now() + Duration::from_secs(120);
    while !dir.path().join("world").join(marker).exists() {
        if let Some(status) = child.try_wait()? {
            anyhow::bail!("P3 child exited before {point} marker: {status}");
        }
        if Instant::now() > deadline {
            child.kill()?;
            child.wait()?;
            anyhow::bail!("P3 did not reach {point} marker");
        }
        std::thread::yield_now();
    }
    child.kill()?;
    let killed = child.wait()?;
    use std::os::unix::process::ExitStatusExt;
    assert_eq!(killed.signal(), Some(9));
    let demo = dir.path().join("world/src/demo");
    assert_eq!(
        git(&demo, &["rev-list", "--count", "main"])?,
        if point == "forward" { "3" } else { "1" }
    );
    if point == "forward" {
        let recorded: serde_json::Value = serde_json::from_str(&std::fs::read_to_string(
            dir.path().join("world/forward-recorded"),
        )?)?;
        assert_eq!(
            recorded[0]["landed"]["sha"].as_str(),
            Some(git(&demo, &["rev-parse", "main"])?.as_str())
        );
    }
    std::fs::write(dir.path().join("world/check-release"), "yes")?;
    // A second reopen proves that idle recovery does not duplicate reports, cards, events, or commits.
    for _ in 0..2 {
        let mut child = spawn("resume")?;
        let deadline = Instant::now() + Duration::from_secs(120);
        loop {
            if let Some(status) = child.try_wait()? {
                anyhow::ensure!(status.success(), "P3 recovery failed: {status}");
                break;
            }
            if Instant::now() > deadline {
                child.kill()?;
                child.wait()?;
                anyhow::bail!("P3 recovery did not reach idle");
            }
            std::thread::yield_now();
        }
        let demo = dir.path().join("world/src/demo");
        assert_eq!(git(&demo, &["rev-list", "--count", "main"])?, "3");
        assert_eq!(
            git(&demo, &["log", "--format=%s", "main"])?
                .lines()
                .filter(|line| *line == "P3 feature")
                .count(),
            1
        );
        assert_eq!(git(&demo, &["status", "--porcelain"])?, "");
        assert_eq!(
            std::fs::read_to_string(demo.join("feature.txt"))?,
            "P3 feature\n"
        );
    }
    Ok(())
}
#[test]
fn worker_sigkill_recovery() -> anyhow::Result<()> {
    recovery("worker")
}
#[test]
fn lander_check_sigkill_recovery() -> anyhow::Result<()> {
    recovery("check")
}
#[test]
fn target_fast_forward_sigkill_recovery() -> anyhow::Result<()> {
    recovery("forward")
}