use crate::{
    app,
    store::{Store, StoredProject},
};
use oa_core::{Id, Project};
use reqwest::{Client, StatusCode};
use serde_json::{Value, json};
use std::{sync::Arc, time::Duration};
use tokio::{sync::oneshot, time::timeout};

#[tokio::test]
async fn prepared_source_http_rechecks_revision_without_holding_catalog() {
    let directory = tempfile::tempdir().unwrap();
    let path = directory.path().to_owned();
    let store = Arc::new(
        tokio::task::spawn_blocking(move || Store::open(path))
            .await
            .unwrap()
            .unwrap(),
    );
    let listener = tokio::net::TcpListener::bind("127.0.0.1:0").await.unwrap();
    let base = format!("http://{}/api/v1", listener.local_addr().unwrap());
    let (stop, done) = oneshot::channel();
    let router = app(store.clone(), None);
    let task = tokio::spawn(async move {
        axum::serve(listener, router)
            .with_graceful_shutdown(async {
                let _ = done.await;
            })
            .await
            .unwrap();
    });
    let client = Client::new();
    let created = client
        .post(format!("{base}/projects"))
        .json(&json!({"name":"Initial review"}))
        .send()
        .await
        .unwrap();
    assert_eq!(created.status(), StatusCode::CREATED);
    let etag = created.headers()["etag"].to_str().unwrap().to_owned();
    let summary: Value = created.json().await.unwrap();
    let id: Id = summary["resource_id"].as_str().unwrap().parse().unwrap();
    let project_url = format!("{base}/projects/{id}");
    let initial: StoredProject = client
        .get(&project_url)
        .send()
        .await
        .unwrap()
        .error_for_status()
        .unwrap()
        .json()
        .await
        .unwrap();
    let (entered, release) = store.pause_next_replacement(id, etag.clone());
    // Real parsing, legacy admission and source preparation all run. Runtime
    // cost is irrelevant: the gate proves the exact pre-commit phase instead.
    let source = "arcadia 2; project prepared \"Prepared stale head\" { oa_activity root \"Root\" {} oa_activity child \"Child\" { parent @root; } }";
    let proposed_client = client.clone();
    let proposed_url = format!("{project_url}/source");
    let proposed_etag = etag.clone();
    let proposed = tokio::spawn(async move {
        proposed_client
            .put(proposed_url)
            .header("if-match", proposed_etag)
            .header("content-type", "text/plain")
            .body(source)
            .send()
            .await
            .unwrap()
    });
    let evidence = timeout(Duration::from_secs(10), entered)
        .await
        .expect("source did not reach validated pre-commit phase")
        .unwrap();
    assert_eq!(evidence.model.name, "Prepared stale head");
    assert_eq!(evidence.model.elements.len(), 2);
    let compiled =
        oa_core::source_project::compile_bundle(&evidence.bundle, crate::store::SOURCE_LIMITS)
            .unwrap();
    assert_eq!(compiled.decoded.project, evidence.model);
    assert!(
        !proposed.is_finished(),
        "prepared request must still overlap the winner"
    );
    let catalog = timeout(
        Duration::from_secs(2),
        client.get(format!("{base}/projects")).send(),
    )
    .await
    .expect("catalog locked during admitted candidate lifetime")
    .unwrap();
    assert_eq!(catalog.status(), StatusCode::OK);
    let winner = timeout(
        Duration::from_secs(2),
        client
            .patch(&project_url)
            .header("if-match", &etag)
            .json(&json!({"name":"Concurrent accepted review"}))
            .send(),
    )
    .await
    .expect("prepared worker held the commit lock")
    .unwrap();
    assert_eq!(winner.status(), StatusCode::OK);
    let winner_etag = winner.headers()["etag"].to_str().unwrap().to_owned();
    assert!(
        !proposed.is_finished(),
        "stale candidate must await explicit release"
    );
    release.release();
    let loser = timeout(Duration::from_secs(10), proposed)
        .await
        .expect("released candidate did not finish")
        .unwrap();
    assert_eq!(loser.status(), StatusCode::PRECONDITION_FAILED);
    let failure: Value = loser.json().await.unwrap();
    assert_eq!(failure["code"], "revision_conflict");
    assert_eq!(failure["current_revision"], 2);
    let committed_response = client.get(&project_url).send().await.unwrap();
    assert_eq!(
        committed_response.headers()["etag"].to_str().unwrap(),
        winner_etag
    );
    let committed: StoredProject = committed_response
        .error_for_status()
        .unwrap()
        .json()
        .await
        .unwrap();
    let mut expected_model: Project = initial.model;
    expected_model.name = "Concurrent accepted review".into();
    assert_eq!(committed.model, expected_model);
    assert_eq!(committed.revision, 2);
    assert!(committed.model.elements.is_empty());
    let installed: StoredProject = serde_json::from_slice(
        &std::fs::read(directory.path().join(format!("{id}.json"))).unwrap(),
    )
    .unwrap();
    assert_eq!(installed.model, committed.model);
    assert_eq!(installed.source_project, committed.source_project);
    assert_eq!(installed.revision, 2);
    assert_eq!(installed.resource_id, committed.resource_id);
    assert_eq!(installed.migration, committed.migration);
    let _ = stop.send(());
    drop(client);
    timeout(Duration::from_secs(5), task)
        .await
        .unwrap()
        .unwrap();
}