//! P3 exit scaffold with a worker SIGKILL and pending lander crash boundaries.
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 copy_tree(source: &Path, destination: &Path) -> anyhow::Result<()> {
    std::fs::create_dir_all(destination)?;
    for entry in std::fs::read_dir(source)? {
        let entry = entry?;
        let target = destination.join(entry.file_name());
        if entry.file_type()?.is_dir() {
            copy_tree(&entry.path(), &target)?;
        } else {
            std::fs::copy(entry.path(), target)?;
        }
    }
    Ok(())
}
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 = Path::new(env!("CARGO_TARGET_TMPDIR")).parent().unwrap();
    let userland = source.join("userland");
    if !userland.join("cwd-init/init.o").exists() {
        anyhow::ensure!(
            Command::new("nu")
                .args(["--no-config-file", "cwd-init/build.nu"])
                .current_dir(&userland)
                .status()?
                .success(),
            "cwd-init build failed"
        );
    }
    anyhow::ensure!(
        Command::new("cargo")
            .args(["build", "--release", "-p", "git", "--manifest-path"])
            .arg(userland.join("Cargo.toml"))
            .args(["--target", "wasm32-wasip2", "--target-dir"])
            .arg(target)
            .args(["-j", "2", "--locked"])
            .current_dir(&userland)
            .status()?
            .success(),
        "world git build failed"
    );
    std::fs::create_dir_all(disk.join("bin"))?;
    std::fs::copy(
        target.join("wasm32-wasip2/release/git.wasm"),
        disk.join("bin/git.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'}); return {name:'probe'}; }",
    )?;
    std::fs::create_dir_all(repo.join("agents"))?;
    std::fs::write(
        repo.join("agents/models.json"),
        r#"{"default":{"model":"faux/faux-1"}}"#,
    )?;
    for role in ["ultimate", "coordinator", "worker", "reviewer"] {
        let denial = if role == "worker" || role == "reviewer" {
            "denyTools: [subagent]\n"
        } else {
            ""
        };
        std::fs::write(
            repo.join(format!("agents/{role}.md")),
            format!(
                "---\nname: {role}\ndescription: P3 {role}\nisolate: none\n{denial}{}---\nP3 role:{role}\n",
                if role == "ultimate" {
                    "resident: true\n"
                } else {
                    ""
                }
            ),
        )?;
    }
    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, &["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(())
}
#[test]
fn worker_sigkill_recovery() -> anyhow::Result<()> {
    let dir = tempfile::tempdir()?;
    prepare(dir.path(), false)?;
    let spawn = |mode: &str| {
        Command::new(std::env::current_exe().unwrap())
            .args(["--exact", "restart_child", "--nocapture"])
            .env("P3_DIR", dir.path())
            .env("P3_MODE", mode)
            .spawn()
    };
    let mut child = spawn("kill-worker")?;
    let deadline = Instant::now() + Duration::from_secs(45);
    while !dir.path().join("world/worker-running").exists() {
        if let Some(status) = child.try_wait()? {
            anyhow::bail!("Worker child exited before marker: {status}");
        }
        if Instant::now() > deadline {
            child.kill()?;
            child.wait()?;
            anyhow::bail!("Worker did not reach kill point 1");
        }
        std::thread::yield_now();
    }
    child.kill()?;
    let killed = child.wait()?;
    use std::os::unix::process::ExitStatusExt;
    assert_eq!(killed.signal(), Some(9));
    // A second reopen proves that idle recovery does not duplicate child reports or commits.
    for _ in 0..2 {
        let mut child = spawn("resume")?;
        let deadline = Instant::now() + Duration::from_secs(45);
        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", "HEAD"])?, "2");
        assert_eq!(git(&demo, &["log", "-1", "--format=%s"])?, "P3 feature");
        assert_eq!(git(&demo, &["status", "--porcelain"])?, "");
        assert_eq!(
            std::fs::read_to_string(demo.join("feature.txt"))?,
            "P3 feature\n"
        );
    }
    Ok(())
}
#[test]
#[ignore = "Pending T52: kill point 2 needs the lander check and marker-file gate"]
fn lander_check_sigkill_recovery() {
    // Wait for the check-start marker, SIGKILL, reopen, release /check-release, and run to idle.
    // Assert one landed event/card and no duplicate board reply (T49).
    panic!("Pending T52 lander check");
}
#[test]
#[ignore = "Pending T52: kill point 3 needs the target fast-forward log entry"]
fn target_fast_forward_sigkill_recovery() {
    // Detect the durable fast-forward log entry, SIGKILL, reopen, and run to idle.
    // Assert one target commit, one landed event/card, no faulted tasks, and worktree release.
    panic!("Pending T52 target fast-forward");
}