defmodule MvWeb.Emails.JoinConfirmationEmail do
  @moduledoc """
  Sends the join request confirmation email (double opt-in) using 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 join confirmation email to the given address with the confirmation link.

  Uses the same SMTP configuration as the test mail (Settings or boot ENV) via
  `Mailer.deliver/2` with `Mailer.smtp_config/0` for consistency.

  Called from the domain after a JoinRequest is created (submit flow) or when
  resending to an existing pending request.

  ## Options
    - `:resend` - If true, adds a short note that the link is being sent again for an existing request.

  Returns `{:ok, email}` on success, `{:error, reason}` on delivery failure.
  """
  def send(email_address, token, opts \\ [])
      when is_binary(email_address) and is_binary(token) do
    confirm_url = url(~p"/confirm_join/#{token}")
    subject = gettext("Confirm your membership request")

    assigns = %{
      confirm_url: confirm_url,
      subject: subject,
      app_name: Mailer.mail_from() |> elem(0),
      locale: Gettext.get_locale(MvWeb.Gettext),
      resend: Keyword.get(opts, :resend, false)
    }

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

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