open Config

let rec deps_of_zone = function
  | ZoneIpv4 _ | ZoneIpv6 _ -> []
  | Zone z -> [z]
  | ZoneList l -> List.flatten (List.map deps_of_zone l)
  | ZoneExclude e -> deps_of_zone e

let deps_of_zones zone =
  List.map (fun (a, b) -> (a, deps_of_zone b)) zone

let compile_zone _ _ = []

let compile_zones zones =
  let deps = deps_of_zones zones in
  match Tsort.sort deps with
  | Tsort.Sorted sorted ->
    List.fold_right (fun name acc ->
        let values = List.assoc name zones in
        let compiled = compile_zone acc values in
        (name, compiled) :: acc) sorted []
  | _ -> assert false

let compile_rule zones { src; dest; l4 } =
  let match_src = match src with
    | [] -> []
    | l -> []
  in
  let match_dest = match dest with
    | [] -> []
    | l -> []
  in
  let l4_rules = compile_l4 zones l4 in
  List.flatten [match_src; match_dest; l4_rules]

let compile_rules zones =
  List.map (compile_rule zones)