class Chronic::RepeaterSeasonName

def next(pointer)
  direction = pointer == :future ? 1 : -1
  find_next_season_span(direction, @type)
end

def offset(span, amount, pointer)
  Span.new(offset_by(span.begin, amount, pointer), offset_by(span.end, amount, pointer))
end

def offset_by(time, amount, pointer)
  direction = pointer == :future ? 1 : -1
  time + amount * direction * RepeaterYear::YEAR_SECONDS
end

def this(pointer = :future)
  # super
  direction = pointer == :future ? 1 : -1
  today = Time.construct(@now.year, @now.month, @now.day)
  goal_ssn_start = today + direction * num_seconds_til_start(@type, direction)
  goal_ssn_end = today + direction * num_seconds_til_end(@type, direction)
  curr_ssn = find_current_season(@now.to_minidate)
  case pointer
  when :past
    this_ssn_start = goal_ssn_start
    this_ssn_end = (curr_ssn == @type) ? today : goal_ssn_end
  when :future
    this_ssn_start = (curr_ssn == @type) ? today + RepeaterDay::DAY_SECONDS : goal_ssn_start
    this_ssn_end = goal_ssn_end
  when :none
    this_ssn_start = goal_ssn_start
    this_ssn_end = goal_ssn_end
  end
  construct_season(this_ssn_start, this_ssn_end)
end