//! Liveness probe: `GET /healthz`.
//!
//! Dependency-free so it can prove the process is up even when the OAuth
//! backends are not configured yet. The readiness check that touches the
//! session/http-client resources is added in Wave 3.

use axum::Json;
use axum::http::StatusCode;
use axum::response::IntoResponse;
use serde::Serialize;

/// JSON body returned by [`healthz`].
#[derive(Debug, Serialize)]
pub struct HealthBody {
  /// Liveness marker; always `"ok"` on a served response.
  pub status: &'static str,
}

/// `GET /healthz` -> `200 OK` with `{"status":"ok"}`.
pub async fn healthz() -> impl IntoResponse {
  (StatusCode::OK, Json(HealthBody { status: "ok" }))
}