require 'chronic'
require 'chronic_duration'
require 'ruby-duration'

require_relative 'time'

module SmartDuration
  def self.parse(time_period)
    # If the time period has is something like 1:00pm to 1:30pm or 1-2, interpret it as a range
    time_of_day_pattern = '\d+:?\d*[ap]?m?'
    
    Duration.new(
      if time_period.to_s.downcase.match(
        /(#{time_of_day_pattern})\s*(to|-)\s*(#{time_of_day_pattern})/
      )
        Chronic.parse($1).count_forward_to(Chronic.parse($3))
      else
        ChronicDuration.parse(time_period)
      end
    )
  end
end