use core.env
use db.postgres.Pool
use web.http.{App, Response}

struct AppState:
    pool: Pool

async fn health(state: AppState) -> Response:
    let version = env.get("APP_VERSION").or("dev")
    let row = await state.pool.query_one<Map>(
        "select now() as now"
    )?

    Response.json({
        "status": "ok",
        "version": version,
        "database_time": row["now"]
    })

async fn main() -> Result<Void, AppError>:
    let database_url = env.require("DATABASE_URL")?
    let port = env.get("PORT").or("8080").to_int()?
    let pool = Pool.connect(database_url, max: 16)?

    let app = App.new()
        .state(AppState { pool: pool })
        .get("/health", health)

    await app.listen("0.0.0.0", port)?