open Cmdliner
open Cmdliner.Term.Syntax
open Offline_impl

let default_master_offline_key_file = "data/master_offline_private_key"
let default_response_file = "response.json"
let default_request_file = "request.json"

(*let to_term_ret = function Error e -> `Error (false, e) | Ok () -> `Ok ()*)
let to_term_ret = Fun.id

let setup_cmd =
  let doc = "Generate offline master keys" in
  let output =
    Arg.(
      value
      & opt filepath default_master_offline_key_file
      & info [ "o"; "output" ] ~doc)
  in
  Cmd.make (Cmd.info "setup" ~doc)
  @@
  let+ output = output in
  setup ~output |> to_term_ret

let download_cmd =
  let doc = "GET /management/keys/" in
  let man =
    [ `S Manpage.s_description; `P "$(cmd) download /management/keys." ]
  in
  let output =
    Arg.(
      value & opt filepath default_response_file & info [ "o"; "output" ] ~doc)
  in
  Cmd.make (Cmd.info "download" ~doc ~man)
  @@
  let+ output = output in
  download ~output |> to_term_ret

let upload_cmd =
  let doc = "POST /management/keys/" in
  let man =
    [ `S Manpage.s_description; `P "$(cmd) upload /management/keys." ]
  in
  let input =
    Arg.(value & opt file default_request_file & info [ "i"; "input" ] ~doc)
  in
  Cmd.make (Cmd.info "upload" ~doc ~man)
  @@
  let+ input = input in
  upload ~input |> to_term_ret

let sign_cmd =
  let doc = "Sign FutureKeysResponse." in
  let master_key =
    let doc = "Master offline Eddsa private key file." in
    Arg.(value & opt file default_master_offline_key_file & info [ "key" ] ~doc)
  in
  let input =
    Arg.(value & opt file default_response_file & info [ "i"; "input" ] ~doc)
  in
  let output =
    Arg.(
      value & opt filepath default_request_file & info [ "o"; "output" ] ~doc)
  in
  Cmd.make (Cmd.info "sign" ~doc)
  @@
  let+ input = input and+ output = output and+ master_key = master_key in
  sign ~input ~output ~master_key |> to_term_ret

let cli =
  let info =
    let doc = "MTE Offline CLI tool" in
    Cmd.info "mte-offline" ~doc
  in
  Cmd.group info [ setup_cmd; download_cmd; sign_cmd; upload_cmd ]

let main () = Cmd.eval_result cli
let () = if !Sys.interactive then () else exit (main ())