defmodule Plausible.Google.API.Mock do
  @moduledoc """
  Mock of API to Google services.
  """

  @doc """
  This function uses the event:page filter (which can be passed as a query
  parameter into StatsController) as a hack to mock different responses.
  """
  def fetch_stats(_auth, query, _pagination, _search) do
    case query.filters do
      [[:is, "event:page", ["/empty"]]] ->
        {:ok, []}

      [[:is, "event:page", ["/unsupported-filters"]]] ->
        {:error, :unsupported_filters}

      [[:is, "event:page", ["/not-configured"]]] ->
        {:error, :google_property_not_configured}

      [[:is, "event:page", ["/unexpected-error"]]] ->
        {:error, :some_unexpected_error}

      _ ->
        {:ok,
         [
           %{"name" => "simple web analytics", "count" => 6},
           %{"name" => "open-source analytics", "count" => 2}
         ]}
    end
  end
end