defmodule LabelmakerWeb.LabelsHTML do
  use LabelmakerWeb, :html

  embed_templates "labels_html/*"

  def format_size(bytes) when bytes < 1024, do: "#{bytes} B"
  def format_size(bytes) when bytes < 1024 * 1024, do: "#{Float.round(bytes / 1024, 1)} KB"
  def format_size(bytes), do: "#{Float.round(bytes / (1024 * 1024), 1)} MB"

  def format_datetime({{year, month, day}, {hour, minute, second}}) do
    "#{year}-#{pad(month)}-#{pad(day)} #{pad(hour)}:#{pad(minute)}:#{pad(second)}"
  end

  defp pad(num) when num < 10, do: "0#{num}"
  defp pad(num), do: "#{num}"

  def pagination_range(current_page, total_pages) do
    cond do
      total_pages <= 7 ->
        # Show all pages if there are 7 or fewer
        1..total_pages

      current_page <= 4 ->
        # Near the beginning: show first 5, then last
        [1, 2, 3, 4, 5, :ellipsis, total_pages]

      current_page >= total_pages - 3 ->
        # Near the end: show first, then last 5
        [1, :ellipsis, total_pages - 4, total_pages - 3, total_pages - 2, total_pages - 1, total_pages]

      true ->
        # In the middle: show first, current +/- 1, and last
        [1, :ellipsis, current_page - 1, current_page, current_page + 1, :ellipsis, total_pages]
    end
  end
end