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use axum::extract::State;
use axum::response::Json;
use axum::routing::get;
use axum::Router;
use serde_json::{json, Value};
use std::sync::Arc;
use std::time::Instant;
use tokio::sync::watch;
pub struct HealthState {
pub started_at: Instant,
pub cycle_count: watch::Receiver<u64>,
pub last_cycle_ok: watch::Receiver<bool>,
pub db_path: String,
}
pub async fn start_health_server(port: u16, state: Arc<HealthState>) -> anyhow::Result<()> {
let app = Router::new()
.route("/health", get(health_handler))
.route("/api/mirror-health", get(health_handler))
.with_state(state);
let listener = tokio::net::TcpListener::bind(format!("127.0.0.1:{}", port)).await?;
tracing::info!(port, "health server listening");
axum::serve(listener, app).await?;
Ok(())
}
async fn health_handler(State(state): State<Arc<HealthState>>) -> Json<Value> {
let uptime = state.started_at.elapsed();
let cycle_count = *state.cycle_count.borrow();
let last_ok = *state.last_cycle_ok.borrow();
Json(json!({
"status": if last_ok || cycle_count == 0 { "ok" } else { "degraded" },
"uptime_secs": uptime.as_secs(),
"cycle_count": cycle_count,
"last_cycle_ok": last_ok,
}))
}
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