defmodule TestStats do
  alias Exq.Redis.Connection
  alias Exq.Redis.JobQueue

  def processed_count(redis, namespace) do
    count = Connection.get!(redis, JobQueue.full_key(namespace, "stat:processed"))
    {:ok, count}
  end

  def failed_count(redis, namespace) do
    count = Connection.get!(redis, JobQueue.full_key(namespace, "stat:failed"))
    {:ok, count}
  end
end

defmodule ExqTestUtil do
  @timeout 20
  @long_timeout 100

  def redis_host do
    Exq.Support.Config.get(:host)
  end

  def redis_port do
    Exq.Support.Config.get(:port)
  end

  import ExUnit.Assertions

  defmodule SendWorker do
    def perform(pid) do
      send String.to_atom(pid), {:worked}
    end
  end

  def assert_exq_up(exq) do
    my_pid = String.to_atom(UUID.uuid4)
    Process.register(self, my_pid)
    {:ok, _} = Exq.enqueue(exq, "default", "ExqTestUtil.SendWorker", [my_pid])
    wait_long
    ExUnit.Assertions.assert_received {:worked}
    Process.unregister(my_pid)
  end

  def stop_process(pid) do
    try do
      Process.exit(pid, :shutdown)
    rescue
      e in RuntimeError -> e
    end
  end

  def wait do
    :timer.sleep(@timeout)
  end

  def wait_long do
    :timer.sleep(@long_timeout)
  end

  def reset_config do
    config = Mix.Config.read!(Path.join([Path.dirname(__DIR__), "config", "config.exs"]))
    Mix.Config.persist(config)
  end
end

defmodule TestRedis do
  import ExqTestUtil
  alias Exq.Redis.Connection

  #TODO: Automate config
  def start do
    unless Exq.Support.Config.get(:test_with_local_redis) == false do
      [] = :os.cmd('redis-server test/test-redis.conf')
      :timer.sleep(100)
    end
  end

  def stop do
    unless Exq.Support.Config.get(:test_with_local_redis) == false do
      [] = :os.cmd('redis-cli -p 6555 shutdown')
    end
  end

  def setup do
    {:ok, redis} = Redix.start_link([host: redis_host, port: redis_port])
    Process.register(redis, :testredis)
    flush_all
    :ok
  end

  def flush_all do
    Connection.flushdb! :testredis
  end

  def teardown do
    if !Process.whereis(:testredis) do
      # For some reason at the end of test the link is down, before we acutally stop and unregister?
      {:ok, redis} = Redix.start_link([host: redis_host, port: redis_port])
      Process.register(redis, :testredis)
    end
    Process.unregister(:testredis)
    :ok
  end
end

# Don't run parallel tests to prevent redis issues
# Exclude longer running failure condition tests by default
ExUnit.configure(seed: 0, max_cases: 1, exclude: [failure_scenarios: true])

# Start logger
:application.start(:logger)

TestRedis.start

System.at_exit fn(status) ->
  TestRedis.stop
end

ExUnit.start