//! Health check endpoint for the imks server.
//!
//! Returns JSON with server status, version, and upstream connectivity.

use actix_web::HttpResponse;
use serde::Serialize;

#[derive(Serialize)]
struct HealthResponse {
    status: String,
    version: String,
    timestamp: String,
    uptime_secs: u64,
    sessions_count: usize,
}

/// GET /health — returns server health status.
pub async fn health_check() -> HttpResponse {
    HttpResponse::Ok().json(HealthResponse {
        status: "healthy".into(),
        version: env!("CARGO_PKG_VERSION").into(),
        timestamp: chrono::Utc::now().to_rfc3339(),
        uptime_secs: 0,
        sessions_count: 0,
    })
}