defmodule LabelmakerWeb.LabelsController do
  use LabelmakerWeb, :controller

  @label_dir Path.join(:code.priv_dir(:labelmaker), "static/labels")

  def index(conn, _params) do
    labels = list_labels()
    render(conn, :index, labels: labels)
  end

  defp list_labels do
    case File.ls(@label_dir) do
      {:ok, files} ->
        files
        |> Enum.filter(&String.ends_with?(&1, ".png"))
        |> Enum.map(fn filename ->
          filepath = Path.join(@label_dir, filename)
          stat = File.stat!(filepath)

          %{
            filename: filename,
            filepath: filepath,
            size: stat.size,
            modified: stat.mtime,
            url: "/labels/#{filename}"
          }
        end)
        |> Enum.sort_by(& &1.modified, :desc)

      {:error, :enoent} ->
        # Directory doesn't exist yet
        []

      {:error, _reason} ->
        []
    end
  end
end