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(*                                                                           *)
(* Open Source License                                                       *)
(* Copyright (c) 2018 Dynamic Ledger Solutions, Inc. <contact@tezos.com>     *)
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(* copy of this software and associated documentation files (the "Software"),*)
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include Time

type time = t

type error += Timestamp_add (* `Permanent *)

type error += Timestamp_sub (* `Permanent *)

let () =
  register_error_kind
    `Permanent
    ~id:"timestamp_add"
    ~title:"Timestamp add"
    ~description:"Overflow when adding timestamps."
    ~pp:(fun ppf () -> Format.fprintf ppf "Overflow when adding timestamps.")
    Data_encoding.empty
    (function Timestamp_add -> Some () | _ -> None)
    (fun () -> Timestamp_add) ;
  register_error_kind
    `Permanent
    ~id:"timestamp_sub"
    ~title:"Timestamp sub"
    ~description:"Substracting timestamps resulted in negative period."
    ~pp:(fun ppf () ->
      Format.fprintf ppf "Substracting timestamps resulted in negative period.")
    Data_encoding.empty
    (function Timestamp_sub -> Some () | _ -> None)
    (fun () -> Timestamp_sub)

let of_seconds s = try Some (of_seconds (Int64.of_string s)) with _ -> None

let to_seconds = to_seconds

let to_seconds_string s = Int64.to_string (to_seconds s)

let pp = pp_hum

let ( +? ) x y =
  try ok (add x (Period_repr.to_seconds y)) with _exn -> error Timestamp_add

let ( -? ) x y = record_trace Timestamp_sub (Period_repr.of_seconds (diff x y))