defmodule Eai.Tool.GetSubagentResult do
  @behaviour Eai.Tool

  @impl true
  def schema do
    %{
      type: "function",
      function: %{
        name: "get_subagent_result",
        description: """
        Retrieve the result of a previously dispatched sub-agent task by subagent_task_id.
        Poll until status == "complete". Wait at least 5 s after call_subagent before first poll.
        """,
        parameters: %{
          type: "object",
          properties: %{
            subagent_task_id: %{
              type: "string",
              description: "subagent_task_id returned by call_subagent."
            }
          },
          required: ["subagent_task_id"]
        }
      }
    }
  end

  @impl true
  def execute(args, _pty_session_id, _chat_session_id) do
    Process.sleep(Application.get_env(:eai, :poll_cooldown_ms))

    case args["subagent_task_id"] do
      nil ->
        Jason.encode!(%{error: "missing subagent_task_id"})

      subagent_task_id ->
        case Eai.Naming.cache().get("subagent_result:#{subagent_task_id}") do
          nil ->
            Jason.encode!(%{error: "task_not_found"})

          %{status: status, started_at: started_at} when status not in ["complete", "error"] ->
            elapsed = System.monotonic_time(:millisecond) - started_at
            Jason.encode!(%{status: "running", time: elapsed})

          result ->
            result |> Eai.Utils.sanitize_value() |> Jason.encode!()
        end
    end
  end
end