module ApplicationHelper
  def humanise_duration(duration)
    raise ArgumentError, "Duration must be a number" unless duration.is_a? ActiveSupport::Duration

    seconds = duration.in_seconds
    minutes = seconds / 60
    hours = minutes / 60

    remaining_minutes = minutes % 60

    if hours > 0
      "#{hours.floor}h #{remaining_minutes.floor}m"
    elsif minutes > 0
      "#{remaining_minutes.floor} minutes"
    else
      "#{seconds}s"
    end
  end
end