defmodule Berrypod.Reviews.ReviewNotifier do
  @moduledoc """
  Sends transactional emails for the review system.

  Verification emails for review submission, and review request emails
  after order delivery.
  """

  import Swoosh.Email

  alias Berrypod.Mailer

  require Logger

  @doc """
  Sends a verification email with a link to leave a review.

  The link contains a signed token encoding the email and product_id.
  """
  def deliver_review_verification(email, product_title, link) do
    subject = "Leave a review for #{product_title}"

    body = """
    ==============================

    Thanks for your purchase!

    Click here to leave a review for #{product_title}:

    #{link}

    This link expires in 1 hour.

    If you didn't request this, you can ignore this email.

    ==============================
    """

    deliver(email, subject, body)
  end

  # --- Private ---

  defp deliver(recipient, subject, body) do
    shop_name = Berrypod.Settings.get_setting("shop_name", "Berrypod")
    from_address = Berrypod.Settings.get_setting("email_from_address", "contact@example.com")

    email =
      new()
      |> to(recipient)
      |> from({shop_name, from_address})
      |> subject(subject)
      |> text_body(body)

    case Mailer.deliver(email) do
      {:ok, _metadata} = result ->
        result

      {:error, reason} = error ->
        Logger.warning("Failed to send review email to #{recipient}: #{inspect(reason)}")
        error
    end
  end
end