defmodule Elstat.Adapter.Ping do
  @behaviour Elstat.Adapter
 
  use GenServer
  require Logger

  def start_link(service_opts) do
    GenServer.start_link(__MODULE__, service_opts, [])
  end

  def init(service_opts) do
    Logger.info("Ping started with #{inspect service_opts}")
    {:ok, %{}}
  end

  def check(args) do
    {cmd_output, _} = System.cmd("ping", ["-c", "1", args.address])
    alive? = not Regex.match?(~r/100(\.0)?% packet loss/, cmd_output)
    {:ok, {:bool, alive?}}
  end
 
end