(*****************************************************************************)
(*                                                                           *)
(* Open Source License                                                       *)
(* Copyright (c) 2018 Dynamic Ledger Solutions, Inc. <contact@tezos.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 *)
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(* Software is furnished to do so, subject to the following conditions:      *)
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(* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,  *)
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(* DEALINGS IN THE SOFTWARE.                                                 *)
(*                                                                           *)
(*****************************************************************************)

open Error_monad

class type ['pr] gen_simple =
  object
    method call_service :
      'm 'p 'q 'i 'o.
      (([< Resto.meth] as 'm), 'pr, 'p, 'q, 'i, 'o) RPC_service.t -> 'p ->
      'q -> 'i -> 'o tzresult Lwt.t
  end

class type ['pr] gen_streamed =
  object
    method call_streamed_service :
      'm 'p 'q 'i 'o.
      (([< Resto.meth] as 'm), 'pr, 'p, 'q, 'i, 'o) RPC_service.t ->
      on_chunk:('o -> unit) -> on_close:(unit -> unit) -> 'p -> 'q -> 'i ->
      (unit -> unit) tzresult Lwt.t
  end

class type ['pr] gen =
  object
    inherit ['pr] gen_simple

    inherit ['pr] gen_streamed
  end

class type simple =
  object
    inherit [unit] gen_simple
  end

class type streamed =
  object
    inherit [unit] gen_streamed
  end

class type t =
  object
    inherit simple

    inherit streamed
  end

type ('o, 'e) rest_result =
  [ `Ok of 'o
  | `Conflict of 'e
  | `Error of 'e
  | `Forbidden of 'e
  | `Not_found of 'e
  | `Gone of 'e
  | `Unauthorized of 'e ]
  tzresult

class type json =
  object
    inherit t

    method generic_json_call :
      RPC_service.meth ->
      ?body:Data_encoding.json ->
      Uri.t ->
      (Data_encoding.json, Data_encoding.json option) rest_result Lwt.t

    method base : Uri.t
  end

class ['pr] of_directory : 'pr RPC_directory.t -> ['pr] gen

type error +=
  | Not_found of {meth : RPC_service.meth; uri : Uri.t}
  | Gone of {meth : RPC_service.meth; uri : Uri.t}
  | Generic_error of {meth : RPC_service.meth; uri : Uri.t}

val make_call :
  ([< Resto.meth], unit, 'p, 'q, 'i, 'o) RPC_service.t ->
  #simple ->
  'p ->
  'q ->
  'i ->
  'o tzresult Lwt.t

val make_call1 :
  ([< Resto.meth], unit, unit * 'a, 'q, 'i, 'o) RPC_service.t ->
  #simple ->
  'a ->
  'q ->
  'i ->
  'o tzresult Lwt.t

val make_call2 :
  ([< Resto.meth], unit, (unit * 'a) * 'b, 'q, 'i, 'o) RPC_service.t ->
  #simple ->
  'a ->
  'b ->
  'q ->
  'i ->
  'o tzresult Lwt.t

val make_call3 :
  ([< Resto.meth], unit, ((unit * 'a) * 'b) * 'c, 'q, 'i, 'o) RPC_service.t ->
  #simple ->
  'a ->
  'b ->
  'c ->
  'q ->
  'i ->
  'o tzresult Lwt.t

type stopper = unit -> unit

val make_streamed_call :
  ([< Resto.meth], unit, 'p, 'q, 'i, 'o) RPC_service.t ->
  #streamed ->
  'p ->
  'q ->
  'i ->
  ('o Lwt_stream.t * stopper) tzresult Lwt.t