defmodule ServerWeb.HostController do
  use ServerWeb, :controller

  alias Server.{Metrics, Repo, Schema.Host}

  def show(conn, %{"name" => name}) do
    case Repo.get_by(Host, name: name) do
      nil ->
        conn
        |> put_status(:not_found)
        |> json(%{error: "host_not_found"})

      %Host{} = host ->
        samples =
          for interval <- ~w(fast medium slow),
              sample = Metrics.latest_sample(host.id, interval),
              into: %{} do
            {interval, %{collected_at: sample.collected_at, payload: sample.payload}}
          end

        json(conn, %{
          name: host.name,
          status: host.status,
          agent_version: host.agent_version,
          last_seen_at: host.last_seen_at,
          samples: samples
        })
    end
  end
end