defmodule Mv.Membership.PhoneNumber do
  @match_pattern ~S/^\+?\d{5,16}$/
  @match_regex Regex.compile!(@match_pattern)

  use Ash.Type.NewType,
    subtype_of: :string,
    constraints: [
      match: @match_pattern,
      trim?: true
    ]

  @impl true
  def cast_input("", _), do: {:ok, nil}

  @impl true
  def cast_input(value, _) when is_binary(value) do
    value = String.trim(value)

    if Regex.match?(@match_regex, value) do
      {:ok, value}
    else
      :error
    end
  end

  @impl true
  def cast_input(_, _), do: :error
end