defmodule Microwaveprop.Workers.Era5PollWorkerTest do
  use Microwaveprop.DataCase, async: false

  alias Microwaveprop.Weather.Era5CdsJob
  alias Microwaveprop.Weather.Era5Client
  alias Microwaveprop.Workers.Era5PollWorker

  setup do
    System.put_env("ERA5_CDS_API_KEY", "test-key")
    on_exit(fn -> System.delete_env("ERA5_CDS_API_KEY") end)
    :ok
  end

  defp insert_cds_job(overrides \\ %{}) do
    attrs =
      Map.merge(
        %{
          year: 2014,
          month: 3,
          tile_lat: 32,
          tile_lon: -98,
          single_job_id: "cds-single-123",
          pressure_job_id: "cds-pressure-456",
          submitted_at: ~U[2026-04-13 21:00:00Z]
        },
        overrides
      )

    {:ok, row} = %Era5CdsJob{} |> Era5CdsJob.changeset(attrs) |> Repo.insert()
    row
  end

  describe "perform/1 — row lifecycle" do
    test "returns :ok and does nothing when the era5_cds_jobs row no longer exists" do
      # Row was already processed/deleted by a previous poll run; snooze is
      # scheduled behind us in time; just no-op.
      Req.Test.stub(Era5Client, fn _ -> raise "CDS should not be contacted" end)

      missing_id = Ecto.UUID.generate()

      assert :ok =
               Era5PollWorker.perform(%Oban.Job{args: %{"era5_cds_job_id" => missing_id}})
    end
  end

  describe "perform/1 — still running" do
    test "returns {:snooze, seconds} and bumps poll_count when either CDS job is still running" do
      row = insert_cds_job()

      Req.Test.stub(Era5Client, fn conn ->
        assert conn.method == "GET"
        Req.Test.json(conn, %{"status" => "running"})
      end)

      assert {:snooze, snooze_s} =
               Era5PollWorker.perform(%Oban.Job{args: %{"era5_cds_job_id" => row.id}})

      assert snooze_s > 0

      reloaded = Repo.get!(Era5CdsJob, row.id)
      assert reloaded.poll_count == 1
      assert reloaded.last_polled_at
    end
  end

  describe "perform/1 — failure" do
    test "returns {:error, _}, deletes the row, and deletes both CDS jobs when a leg fails" do
      row = insert_cds_job()
      test_pid = self()

      Req.Test.stub(Era5Client, fn conn ->
        cond do
          conn.method == "GET" and String.contains?(conn.request_path, "cds-single-123") ->
            Req.Test.json(conn, %{"status" => "failed", "message" => "bad input"})

          conn.method == "GET" and String.contains?(conn.request_path, "cds-pressure-456") ->
            Req.Test.json(conn, %{"status" => "running"})

          conn.method == "DELETE" ->
            send(test_pid, {:delete, conn.request_path})
            Plug.Conn.resp(conn, 204, "")
        end
      end)

      assert {:error, reason} =
               Era5PollWorker.perform(%Oban.Job{args: %{"era5_cds_job_id" => row.id}})

      assert reason =~ "bad input"
      refute Repo.get(Era5CdsJob, row.id)

      # Both CDS jobs are deleted to free server-side quota.
      assert_received {:delete, "/api/retrieve/v1/jobs/cds-single-123"}
      assert_received {:delete, "/api/retrieve/v1/jobs/cds-pressure-456"}
    end
  end
end