-module(wait_task).
-behaviour(bt_task).
-export([
  get_params/0,
  init/2,
  run/4
]).

-record(state, {
  start_timestamp,
  wait_time_sec
}).

get_params() ->
  ["time"].

init(#{"time" := Time_key}, BB) ->
  Time = blackboard:eval(Time_key, BB),
  %% get current timestamp and add to state
  #state{
    start_timestamp = erlang:timestamp(),
    wait_time_sec = Time
  }.

run(_Args, State = #state{start_timestamp = StartTimestamp, wait_time_sec = WaitTimeSec}, BB, _Event) -> 
  %% if already WaitTimeSec seconds have passed, return success, otherwise running
  NowTimestamp = erlang:timestamp(),
  DiffInMicroseconds = timer:now_diff(NowTimestamp, StartTimestamp),
  DiffInSeconds = DiffInMicroseconds/1000000,
  if
    DiffInSeconds > WaitTimeSec -> {success, State, BB};
    true ->
      io:format("Waiting...~n"),
      {running, State, BB}
  end.