let regularly_call_fun f v =
  let () = Sys.set_signal Sys.sigalrm (Sys.Signal_handle (fun _ -> f ())) in
  let (_ : Unix.interval_timer_status) =
    Unix.setitimer Unix.ITIMER_REAL { Unix.it_interval = v; Unix.it_value = v }
  in
  ()

let update_offline_user_state () =
  (* TODO *)
  ()

let update_online_user_state () =
  Hashtbl.filter_map_inplace
    (fun _user_id state -> Some (Shared.State.auto_update state))
    User.state_ht

let to_repeat () =
  update_online_user_state ();
  update_offline_user_state ()

let () =
  regularly_call_fun to_repeat
    (Shared.Time.s_to_float Shared.State.auto_update_rate)

let () =
  let logger = if App.log then Dream.logger else Fun.id in
  Dream.run ~port:App.port @@ logger @@ Dream.sql_pool Db.db_uri
  @@ Dream.sql_sessions ~lifetime:3600.
  @@ Dream.router
       Dream.
         [ get "/assets/**" Asset.get
         ; get "/" Home.get
         ; get "/island" Island.get
         ; get "/island/ws" (fun request ->
               Dream.websocket @@ Ws.handle_client request )
         ; get "/login" Login.get
         ; post "/login" Login.post
         ; get "logout" Logout.get
         ; get "/register" Register.get
         ; post "/register" Register.post
         ]