(*****************************************************************************)
(*                                                                           *)
(* Open Source License                                                       *)
(* Copyright (c) 2023 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 = Process : Layer1.head -> (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:"Process"
          (obj2
             (req "request" (constant "process"))
             (req "block" Layer1.head_encoding))
          (function View (Process b) -> Some ((), b))
          (fun ((), b) -> View (Process b));
      ]

  let pp ppf (View r) =
    match r with
    | Process {Layer1.hash; level} ->
        Format.fprintf
          ppf
          "Processing new L1 head %a at level %ld"
          Block_hash.pp
          hash
          level
end