defmodule MvWeb.Helpers.AshErrorHelpers do
  @moduledoc """
  Shared formatting for Ash errors surfaced as flash messages in the
  member show LiveComponents.

  Centralizes the translation of `Ash.Error.Invalid` / `Ash.Error.Forbidden`
  (and plain string/unknown errors) into user-facing text so the components do
  not each carry their own copy.
  """
  use Gettext, backend: MvWeb.Gettext

  @doc """
  Turns an Ash error into a human-readable, localized string.

  - `Ash.Error.Invalid` — joins the individual error messages, falling back to
    `inspect/1` for sub-errors that carry no `:message`.
  - `Ash.Error.Forbidden` — a localized "not allowed" message.
  - a binary — passed through unchanged (already a ready-to-show message).
  - anything else — a localized generic error message.
  """
  def format_error(%Ash.Error.Invalid{errors: errors}) do
    Enum.map_join(errors, ", ", fn
      %{message: message} -> message
      other -> inspect(other)
    end)
  end

  def format_error(%Ash.Error.Forbidden{}) do
    gettext("You are not allowed to perform this action.")
  end

  def format_error(error) when is_binary(error), do: error
  def format_error(_error), do: gettext("An error occurred")
end