class Poll
  include Mongoid::Document
  embeds_many :poll_responses
  accepts_nested_attributes_for :poll_responses
  
  field :question, type: String
  field :choices, type: Array, default: Array.new
  field :duration, type: Time

  validates :question, presence: true
  validates :choices, presence: true, 
                      length: { minimum: 2, allow_blank: false }

  def has_response_from?(user)
    self.poll_responses.where(user_ids: user.id).exists?
  end

  def send_to_all_users
    Company.all.each {|c| c.add_to_set(:poll_ids, self.id)}
  end

  def send_to_users_by(criteria, value)
    Company.where(criteria => value).map {|c| c.add_to_set(:poll_ids, self.id)}
  end

  def update_duration(end_date)
    self.update_attributes(duration: (Time.now + end_date.to_i.days))
  end

  def expired?
    if self.duration
      self.duration < Time.now ? true : false
    else
      nil 
    end
  end
end