before_validation :parse_dates
  validate :ends_at_is_after_starts_at, :dates_are_valid
  attr_accessor :starts_at_date, :starts_at_time, :ends_at_date, :ends_at_time

  def parse_dates
    self.starts_at = Chronic.parse(starts_at_date + " " + starts_at_time)
    self.ends_at = Chronic.parse(ends_at_date + " " + ends_at_time)
  end

  def dates_are_valid
    errors.add(:starts_at_date, " is invalid") if !Chronic.parse(starts_at_date)
    errors.add(:starts_at_time, " is invalid") if !Chronic.parse(starts_at_time)
    errors.add(:ends_at_date, " is invalid") if !Chronic.parse(ends_at_date)
    errors.add(:ends_at_time, " is invalid") if !Chronic.parse(ends_at_time)
  end

  def ends_at_is_after_starts_at
    unless ends_at.nil? or starts_at.nil?
      errors.add(:ends_at, " can't be before Starts At time, McFly.") if ends_at < starts_at
    end
  end