defmodule ArcadiaCloudWeb.CatalogController do
  @moduledoc """
  Read-only pricing catalog. Available to any authenticated tenant — the
  catalog is what they pick a plan from. Pricing changes are operator
  actions; no write endpoints here for MVP (seed/CLI only).
  """

  use ArcadiaCloudWeb, :controller

  alias ArcadiaCloud.Catalog

  def plans(conn, _params) do
    plans =
      Catalog.list_plans()
      |> Enum.map(fn plan ->
        version = Catalog.active_version(plan)
        shape_plan(plan, version)
      end)

    json(conn, %{plans: plans})
  end

  def addons(conn, _params) do
    addons =
      Catalog.list_addons()
      |> Enum.map(fn a ->
        %{
          code: a.code,
          name: a.name,
          resource_kind: a.resource_kind,
          qty: a.qty,
          price_cents: a.price_cents,
          currency: a.currency
        }
      end)

    json(conn, %{addons: addons})
  end

  defp shape_plan(plan, nil) do
    %{code: plan.code, name: plan.name, description: plan.description, active_version: nil}
  end

  defp shape_plan(plan, version) do
    %{
      code: plan.code,
      name: plan.name,
      description: plan.description,
      active_version: %{
        id: version.id,
        version: version.version,
        base_price_cents: version.base_price_cents,
        currency: version.currency,
        items:
          Enum.map(version.items, fn i ->
            %{
              resource_kind: i.resource_kind,
              included_qty: i.included_qty,
              overage_unit: i.overage_unit,
              overage_price_cents: i.overage_price_cents,
              hard_cap_qty: i.hard_cap_qty
            }
          end)
      }
    }
  end
end