defmodule StepFlow.Amqp.WorkerInitializedConsumer do
  @moduledoc """
  Consumer of all worker inits.
  """

  import Ecto.Query, warn: false

  require Logger
  alias StepFlow.Amqp.WorkerInitializedConsumer
  alias StepFlow.Jobs
  alias StepFlow.Jobs.Job
  alias StepFlow.Jobs.Status
  alias StepFlow.Repo
  alias StepFlow.Repo.Checker
  alias StepFlow.Workflows
  alias StepFlow.Workflows.StepManager

  use StepFlow.Amqp.CommonConsumer, %{
    queue: "worker_initialized",
    exchange: "worker_response",
    prefetch_count: 1,
    consumer: &WorkerInitializedConsumer.consume/4
  }

  @doc """
  Consume worker initialized message.
  """
  def consume(
        channel,
        tag,
        _redelivered,
        %{
          "job_id" => job_id
        } = _payload
      ) do
    if Checker.repo_running?() do
      {:ok, _} = Status.set_job_status(job_id, "ready_to_start")
      query = from(job in Job, select: job.id)
      stream = Repo.stream(query)

      Repo.transaction(fn ->
        Enum.to_list(stream)
      end)

      :timer.sleep(5000)
      Workflows.notification_from_job(job_id)

      case Jobs.get_job(job_id) do
        nil ->
          Basic.reject(channel, tag, requeue: false)

        job ->
          if job.is_live do
            StepManager.check_step_status(%{job_id: job_id})
          end

          Basic.ack(channel, tag)
      end
    else
      Logger.warn(
        "#{__MODULE__}: The database is not available, reject and requeue consumed message..."
      )

      Basic.reject(channel, tag, requeue: true)
    end
  end

  def consume(channel, tag, _redelivered, payload) do
    Logger.error("Worker initialized #{inspect(payload)}")
    Basic.reject(channel, tag, requeue: false)
  end
end