open Alcotest
open Pam.Datatypes

let pprint_ptime ppf x = Fmt.pf ppf "%s" (Ptime.to_rfc3339 x) 
let ptime_testable = Alcotest.testable pprint_ptime Ptime.equal

let test_parse () =
    let body = {|@alert: -12:38 10:02 +09:24 --10:00 +++23:00

      ## Description

      Specify a time format by writing the exact time of the alert, then adding zero or more '+' or '-'.
      Examples, due date is 1/1/1970:
      1. 12:38: you get the alert 1/1/1970 at 12:38
      2. -12:38: you get the alert 31/12/1969 at 12:38
      3. --12:38: you get the alert 30/12/1969 at 12:38
      4. +12:38: you get the alert 2/1/1970 at 12:38   |}
    in
    let m = MatrixRoom.make "test" in
    let reminder = {url="example.org"; title= "example"; due_date= Some "2024-04-20T23:59:59+02:00"; body=body; matrix_target=m} in
    let expected = [
      "2024-04-19T12:38:00+02:00" ;
      "2024-04-20T10:02:00+02:00" ;
      "2024-04-21T09:24:00+02:00" ;
      "2024-04-18T10:00:00+02:00" ;
      "2024-04-23T23:00:00+02:00" ;
    ] |> List.map (fun e -> e |> Ptime.of_rfc3339 |> Result.get_ok |> function | t, _, _ -> t) in
    let res = Pam.Issue_parser.to_datetime reminder in
    match res with
    | Ok None -> Alcotest.fail "Got Ok None"
    | Error e -> Alcotest.fail [%string "Got Error %{e}"]
    | Ok (Some got) -> Alcotest.check (list ptime_testable) "Alert times" expected got


let () =
  Alcotest.run "test1" [
    "alert_times", [test_case "Test Alert Times" `Quick test_parse]
  ]