defmodule Ash.Error.Framework.FlagAssertionFailed do
  @moduledoc "Used when unreachable code/conditions are reached in the framework"
  use Ash.Error.Exception

  def_ash_error([:flag, :heading], class: :framework)

  defimpl Ash.ErrorKind do
    def id(_), do: Ash.UUID.generate()

    def code(_), do: "flag_failed"

    def message(error) do
      flag_env_name =
        error.flag
        |> to_string()
        |> String.trim_trailing("?")
        |> String.upcase()

      """
      #{error.heading}

      If you are trying to develop or test against a flagged feature either set the flag to the appropriate value in `config.exs` or set the `FLAG_#{flag_env_name}` environment variable (at both compile time and run time).
      """
    end
  end
end