defmodule HaytniWeb.Confirmable.ConfirmationController do
  @moduledoc false

  use HaytniWeb, :controller
  use HaytniWeb.Helpers, Haytni.ConfirmablePlugin
  import Haytni.Gettext

  @spec confirmed_message() :: String.t
  def confirmed_message do
    dgettext("haytni", "Your account has been confirmed.")
  end

  @spec confirmation_sent_message() :: String.t
  def confirmation_sent_message do
    if Application.get_env(:haytni, :mode) == :strict do
      dgettext("haytni", "If the provided informations match our database and your email address has not been confirmed yet, you will shortly receive the instructions to do so.")
    else
      dgettext("haytni", "A new confirmation has been sent.")
    end
    |> Haytni.Helpers.concat_spam_check_hint_message()
  end

  # GET /confirmation?confirmation_token=<token>
  # Process the token to confirm an account (if valid)
  def show(conn, %{"confirmation_token" => confirmation_token}, module, config) do
    case Haytni.ConfirmablePlugin.confirm(module, config, confirmation_token) do
      {:ok, _user} ->
        conn
        |> HaytniWeb.Shared.next_step_link(HaytniWeb.Shared.session_path(conn, module), dgettext("haytni", "Continue to sign in"))
        |> HaytniWeb.Shared.render_message(module, confirmed_message())
      {:error, message} ->
        conn
        |> HaytniWeb.Shared.render_message(module, message, :error)
    end
  end

  defp render_new(conn, changeset = %Ecto.Changeset{}) do
    conn
    |> assign(:changeset, changeset)
    |> render("new.html")
  end

  # GET /confirmation/new
  # Request a new confirmation mail to be sent (and a new token to be generated)
  def new(conn, _params, _module, config) do
    changeset = conn
    |> HaytniWeb.Shared.add_referer_to_changeset(Haytni.ConfirmablePlugin.confirmation_request_changeset(config))
    conn
    |> render_new(changeset)
  end

  # POST /confirmation
  # The real magic to ask for a new confirmation token
  def create(conn, %{"confirmation" => confirmation_params}, module, config) do
    case Haytni.ConfirmablePlugin.resend_confirmation_instructions(module, config, confirmation_params) do
      {:ok, _user} ->
        conn
        |> HaytniWeb.Shared.render_message(module, confirmation_sent_message())
      {:error, changeset = %Ecto.Changeset{}} ->
        render_new(conn, changeset)
    end
  end
end