(*****************************************************************************)
(*                                                                           *)
(* Open Source License                                                       *)
(* Copyright (c) 2022 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 *)
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(* Software is furnished to do so, subject to the following conditions:      *)
(*                                                                           *)
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(* in all copies or substantial portions of the Software.                    *)
(*                                                                           *)
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(* DEALINGS IN THE SOFTWARE.                                                 *)
(*                                                                           *)
(*****************************************************************************)

module Request = struct
  type ('a, 'b) t =
    | Register : string list -> (L2_message.hash list, error trace) t
    | Produce_batches : (unit, error trace) t

  type view = View : _ t -> view

  let view req = View req

  let encoding =
    let open Data_encoding in
    union
      [
        case
          (Tag 0)
          ~title:"Register"
          (obj2
             (req "request" (constant "register"))
             (req "messages" (list L2_message.content_encoding)))
          (function
            | View (Register messages) -> Some ((), messages) | _ -> None)
          (fun ((), messages) -> View (Register messages));
        case
          (Tag 1)
          ~title:"Produce_batches"
          (obj1 (req "request" (constant "produce_batches")))
          (function View Produce_batches -> Some () | _ -> None)
          (fun () -> View Produce_batches);
      ]

  let pp ppf (View r) =
    match r with
    | Register messages ->
        Format.fprintf ppf "register %d new L2 message" (List.length messages)
    | Produce_batches -> Format.fprintf ppf "Producing messages batches."
end