class BirthdayCalculator

# File lib/birthday_calculator.rb, line 7
def initialize(date)
  @date = date
end

# File lib/birthday_calculator.rb, line 11
def days_to_next_birthday
  birthday_date =
    if @date.is_a?(DateTime)
      @date
    else
      DateTime.parse(@date)
    end

  current_date = DateTime.now
  
  current_birthday = modify_date(current_date.year,
                                 birthday_date.month,
                                 birthday_date.day,
                                 birthday_date.hour,
                                 birthday_date.min,
                                 birthday_date.sec)
  
  time_left = 
    if current_birthday - current_date >= 0
      current_birthday.utc - current_date.utc - Time.now.utc_offset
    else 
      modify_date(current_date.year + 1,
                  current_birthday.month,
                  current_birthday.day,
                  current_birthday.hour,
                  current_birthday.min,
                  current_birthday.sec).utc - current_date.utc - Time.now.utc_offset
    end

  mm, ss = time_left.divmod(60)
  hh, mm = mm.divmod(60)         
  dd, hh = hh.divmod(24)

  OpenStruct.new(days: dd, hours: hh, minutes: mm)
end

# File lib/birthday_calculator.rb, line 47
def modify_date(year, month, day, hour, min, sec) 
  begin
    DateTime.new(year, month, day, hour, min, sec)
  rescue ArgumentError
    for i in 1..4
      begin 
        return DateTime.new(year + i, month, day, hour, min, sec)
      rescue ArgumentError
        next
      end
    end
  end
end