defmodule ArcadiaCloud.Metering.MeteringConfig do
  use Ecto.Schema
  import Ecto.Changeset

  @primary_key {:id, :binary_id, autogenerate: true}
  @foreign_key_type :binary_id

  @granularities ~w(daily hourly)

  schema "metering_config" do
    field :resource_kind, :string
    field :granularity, :string, default: "daily"
    field :retention_days, :integer, default: 400

    timestamps(type: :utc_datetime)
  end

  def changeset(config, attrs) do
    config
    |> cast(attrs, [:resource_kind, :granularity, :retention_days])
    |> validate_required([:resource_kind, :granularity])
    |> validate_inclusion(:granularity, @granularities)
    |> unique_constraint(:resource_kind)
  end
end