defmodule MvWeb.Emails.JoinAlreadyPendingEmail do
  @moduledoc """
  Sends an email when someone submits the join form with an address that already
  has a submitted (confirmed) application under review.

  Used for anti-enumeration: the UI shows the same success message; only the email
  informs the recipient. Uses the unified email layout.
  """
  use Phoenix.Swoosh,
    view: MvWeb.EmailsView,
    layout: {MvWeb.EmailLayoutView, "layout.html"}

  use MvWeb, :verified_routes
  import Swoosh.Email
  use Gettext, backend: MvWeb.Gettext, otp_app: :mv

  alias Mv.Mailer

  @doc """
  Sends the "application already under review" notice to the given address.

  Returns `{:ok, email}` on success, `{:error, reason}` on delivery failure.
  """
  def send(email_address) when is_binary(email_address) do
    subject = gettext("Membership application – already under review")

    assigns = %{
      subject: subject,
      app_name: Mailer.mail_from() |> elem(0),
      locale: Gettext.get_locale(MvWeb.Gettext)
    }

    email =
      new()
      |> from(Mailer.mail_from())
      |> to(email_address)
      |> subject(subject)
      |> put_view(MvWeb.EmailsView)
      |> render_body("join_already_pending.html", assigns)

    Mailer.deliver(email, Mailer.smtp_config())
  end
end