(*****************************************************************************)
(*                                                                           *)
(* Open Source License                                                       *)
(* Copyright (c) 2018 Dynamic Ledger Solutions, Inc. <contact@tezos.com>     *)
(* Copyright (c) 2018-2021 Nomadic Labs, <contact@nomadic-labs.com>          *)
(*                                                                           *)
(* Permission is hereby granted, free of charge, to any person obtaining a   *)
(* copy of this software and associated documentation files (the "Software"),*)
(* to deal in the Software without restriction, including without limitation *)
(* the rights to use, copy, modify, merge, publish, distribute, sublicense,  *)
(* and/or sell copies of the Software, and to permit persons to whom the     *)
(* Software is furnished to do so, subject to the following conditions:      *)
(*                                                                           *)
(* The above copyright notice and this permission notice shall be included   *)
(* in all copies or substantial portions of the Software.                    *)
(*                                                                           *)
(* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR*)
(* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,  *)
(* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL   *)
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(* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER       *)
(* DEALINGS IN THE SOFTWARE.                                                 *)
(*                                                                           *)
(*****************************************************************************)

let build_rpc_directory block_validator store =
  let open Lwt_result_syntax in
  let dir : unit Tezos_rpc.Directory.t ref = ref Tezos_rpc.Directory.empty in
  let gen_register0 s f =
    dir := Tezos_rpc.Directory.gen_register !dir s (fun () p q -> f p q)
  in
  let register1 s f =
    dir := Tezos_rpc.Directory.register !dir s (fun ((), a) p q -> f a p q)
  in
  gen_register0 Protocol_services.S.list (fun () () ->
      let set = Store.Protocol.all store in
      let protocols =
        Protocol_hash.Set.add_seq (Registered_protocol.seq_embedded ()) set
      in
      Tezos_rpc.Answer.return (Protocol_hash.Set.elements protocols)) ;
  register1 Protocol_services.S.contents (fun hash () () ->
      match Registered_protocol.get_embedded_sources hash with
      | Some p -> return p
      | None -> (
          let*! o = Store.Protocol.read store hash in
          match o with None -> fail_with_exn Not_found | Some p -> return p)) ;
  register1 Protocol_services.S.environment (fun hash () () ->
      match Registered_protocol.get_embedded_sources hash with
      | Some p -> return p.expected_env
      | None -> (
          let*! o = Store.Protocol.read store hash in
          match o with
          | None -> fail_with_exn Not_found
          | Some p -> return p.expected_env)) ;
  register1 Protocol_services.S.fetch (fun hash () () ->
      let* _proto =
        Block_validator.fetch_and_compile_protocol block_validator hash
      in
      return_unit) ;
  !dir