defmodule Mix.Tasks.TestPaxos do
  use Mix.Task

  def run(_) do
    IO.puts("Testing Paxos")

    procs = Enum.map(0..3, fn i -> String.to_atom("p#{i}") end)
    _pids = Enum.map(procs, fn p -> start(p, procs) end)

    IO.puts("spawned")

    Process.send_after(self(), {:end}, 50000)

    receive do
      {:end} ->
        IO.puts("test ended")
    end
  end

  def start(name, procs) do
    pid = spawn(Mix.Tasks.TestPaxos, :init, [name, procs])

    Utils.register_name(name, pid)
  end

  def init(name, procs) do
    IO.puts("#{name}: init")
    Paxos.start(name, procs)

    Process.sleep(200)

    if name == :p0 do
      Paxos.propose(name, "Hi I was decided")
    end

    run_test(name)
  end

  def run_test(name) do
    receive do
      {:decide, value} ->
        IO.puts("#{name}: decide #{value}")
    end

    run_test(name)
  end
end