defmodule Microwaveprop.Propagation.PipelineStatusTest do
  use Microwaveprop.DataCase, async: false

  alias Microwaveprop.Propagation.PipelineStatus
  alias Microwaveprop.Repo

  @grid_worker "Microwaveprop.Workers.PropagationGridWorker"
  @asos_worker "Microwaveprop.Workers.AsosAdjustmentWorker"

  # Bypass Oban's normal insert pipeline (which executes inline in test)
  # by writing directly to the Oban.Job schema. The SQL sandbox keeps
  # Oban's executor from seeing these rows.
  defp insert_oban_job(overrides) do
    now = DateTime.utc_now()

    defaults = %{
      state: "available",
      queue: "propagation",
      worker: @grid_worker,
      args: %{},
      attempt: 0,
      max_attempts: 3,
      inserted_at: now,
      scheduled_at: now
    }

    attrs = Map.merge(defaults, Map.new(overrides))
    Repo.insert!(struct!(Oban.Job, attrs))
  end

  defp minutes_ago(n) do
    DateTime.add(DateTime.utc_now(), -n * 60, :second)
  end

  describe "current/0" do
    test "returns :unknown when no pipeline jobs have ever run" do
      status = PipelineStatus.current()

      assert status.state == :unknown
      assert status.last_update_at == nil
      assert is_binary(status.label)
    end

    test "returns :running with grid worker label when PropagationGridWorker is executing" do
      insert_oban_job(%{
        state: "executing",
        worker: @grid_worker,
        attempted_at: minutes_ago(5)
      })

      status = PipelineStatus.current()

      assert status.state == :running
      assert status.label =~ "HRRR"
    end

    test "returns :running with ASOS label when AsosAdjustmentWorker is executing" do
      insert_oban_job(%{
        state: "executing",
        worker: @asos_worker,
        attempted_at: minutes_ago(1)
      })

      status = PipelineStatus.current()

      assert status.state == :running
      assert status.label =~ "ASOS"
    end

    test "returns :idle with Up to date label when last grid run completed recently" do
      completed = minutes_ago(15)

      insert_oban_job(%{
        state: "completed",
        worker: @grid_worker,
        attempted_at: completed,
        completed_at: completed
      })

      status = PipelineStatus.current()

      assert status.state == :idle
      assert status.last_update_at
      assert status.label =~ "Up to date"
    end

    test "returns :stale when last completed was more than 120 minutes ago" do
      stale = minutes_ago(180)

      insert_oban_job(%{
        state: "completed",
        worker: @grid_worker,
        attempted_at: stale,
        completed_at: stale
      })

      status = PipelineStatus.current()

      assert status.state == :stale
      assert status.label =~ "stale"
    end

    test "prefers :running over :idle when a job is executing even if a recent job completed" do
      recent = minutes_ago(5)

      insert_oban_job(%{
        state: "completed",
        worker: @grid_worker,
        attempted_at: recent,
        completed_at: recent
      })

      insert_oban_job(%{
        state: "executing",
        worker: @grid_worker,
        attempted_at: minutes_ago(1)
      })

      status = PipelineStatus.current()

      assert status.state == :running
    end

    test "ignores completed jobs from unrelated workers" do
      # WeatherFetchWorker enriches individual QSOs — it's not part of
      # the CONUS grid update pipeline, so its recent success should
      # not make the map page show 'Up to date'.
      completed = minutes_ago(5)

      insert_oban_job(%{
        state: "completed",
        worker: "Microwaveprop.Workers.WeatherFetchWorker",
        queue: "weather",
        attempted_at: completed,
        completed_at: completed
      })

      status = PipelineStatus.current()

      assert status.state == :unknown
    end
  end
end