//! v1.1.9 retry::* end-to-end test against a real engine inside the
//! all-in-one binary. Smaller surface than queue/invoke (no async
//! plumbing) — covers policy clamping, success-on-Nth-attempt, and
//! on_codes filtering through a real HTTP route.
//!
//! Skips when DATABASE_URL is unset.

#![allow(clippy::needless_pass_by_value)]

use axum_test::TestServer;
use serde_json::{json, Value};
use sqlx::postgres::PgPoolOptions;
use sqlx::PgPool;
use uuid::Uuid;

async fn pool_or_skip() -> Option<PgPool> {
    let Ok(url) = std::env::var("DATABASE_URL") else {
        eprintln!("retry_e2e: DATABASE_URL unset — skipping");
        return None;
    };
    let pool = PgPoolOptions::new()
        .max_connections(2)
        .connect(&url)
        .await
        .expect("connect");
    sqlx::migrate!("../manager-core/migrations")
        .run(&pool)
        .await
        .expect("migrate");
    Some(pool)
}

async fn server_for(pool: PgPool, suffix: &str) -> (TestServer, String) {
    use picloud_manager_core::auth::hash_password;
    use picloud_shared::InstanceRole;

    let unique = format!("{suffix}-{}", Uuid::new_v4().simple());
    let auth = picloud::AuthDeps::from_pool(pool.clone());
    let username = format!("e2e-{unique}");
    let hash = hash_password("pw").expect("hash");
    auth.users
        .create(&username, &hash, InstanceRole::Owner, None)
        .await
        .expect("seed admin");

    let app = picloud::build_app(
        pool,
        auth,
        picloud_shared::MasterKey::from_bytes([0x42u8; 32]),
    )
    .await
    .expect("build_app");
    let mut server = TestServer::new(app).expect("TestServer");
    let resp = server
        .post("/api/v1/admin/auth/login")
        .json(&json!({ "username": username, "password": "pw" }))
        .await;
    resp.assert_status_ok();
    let token = resp.json::<Value>()["token"]
        .as_str()
        .expect("token")
        .to_string();
    server.add_header("authorization", format!("Bearer {token}"));

    let slug = format!("e2e-{unique}");
    let created: Value = server
        .post("/api/v1/admin/apps")
        .json(&json!({ "slug": slug, "name": slug }))
        .await
        .json();
    let app_id = created["id"].as_str().expect("app id").to_string();
    (server, app_id)
}

async fn create_route_for(
    server: &TestServer,
    app_id: &str,
    name: &str,
    source: &str,
    path: &str,
) {
    let created: Value = server
        .post("/api/v1/admin/scripts")
        .json(&json!({ "app_id": app_id, "name": name, "source": source }))
        .await
        .json();
    let script_id = created["id"].as_str().expect("script id");
    let resp = server
        .post(&format!("/api/v1/admin/apps/{app_id}/routes"))
        .json(&json!({
            "script_id": script_id,
            "method": "GET",
            "path": path,
            "host": null,
            "dispatch_mode": "sync"
        }))
        .await;
    resp.assert_status(axum::http::StatusCode::CREATED);
}

#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
async fn retry_run_eventually_succeeds_inside_http_handler() {
    let Some(pool) = pool_or_skip().await else { return };
    let (server, app_id) = server_for(pool, "retry-succ").await;

    // attempt counter mutates across retries; the 3rd attempt returns
    // the count.
    let src = r#"
        let attempts = 0;
        let p = retry::policy(#{ max_attempts: 5, base_ms: 1, jitter_pct: 0 });
        let v = retry::run(p, || {
            attempts += 1;
            if attempts < 3 { throw "transient" } else { attempts }
        });
        #{ statusCode: 200, body: v }
    "#;
    create_route_for(&server, &app_id, "succ", src, "/r/succ").await;

    let resp = server.get("/r/succ").await;
    resp.assert_status_ok();
    let body: Value = resp.json();
    assert_eq!(body, json!(3));
}

#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
async fn retry_run_surfaces_last_error_after_max_attempts() {
    let Some(pool) = pool_or_skip().await else { return };
    let (server, app_id) = server_for(pool, "retry-surf").await;

    let src = r#"
        let p = retry::policy(#{ max_attempts: 2, base_ms: 1, jitter_pct: 0 });
        try {
            retry::run(p, || { throw "boom" });
            #{ statusCode: 200, body: "did not throw" }
        } catch(e) {
            #{ statusCode: 200, body: e }
        }
    "#;
    create_route_for(&server, &app_id, "surf", src, "/r/surf").await;

    let resp = server.get("/r/surf").await;
    resp.assert_status_ok();
    let body: Value = resp.json();
    let s = body.as_str().unwrap_or_default();
    assert!(s.contains("boom"), "expected 'boom' in error, got: {s}");
}

#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
async fn retry_on_codes_filters_unmatched_errors() {
    let Some(pool) = pool_or_skip().await else { return };
    let (server, app_id) = server_for(pool, "retry-codes").await;

    // attempts is mutated on every entry; we throw a non-matching code
    // → must surface immediately (attempts == 1).
    let src = r#"
        let attempts = 0;
        let p = retry::policy(#{ max_attempts: 5, base_ms: 1, jitter_pct: 0 });
        let p2 = retry::on_codes(p, ["http: 503"]);
        try {
            retry::run(p2, || {
                attempts += 1;
                throw "other failure"
            });
        } catch(_e) {
            // swallow — assert via attempts count.
        }
        #{ statusCode: 200, body: attempts }
    "#;
    create_route_for(&server, &app_id, "codes", src, "/r/codes").await;

    let resp = server.get("/r/codes").await;
    resp.assert_status_ok();
    let body: Value = resp.json();
    assert_eq!(body, json!(1), "non-matching error should surface immediately");
}