class Tag
  include Mongoid::Document
  include Mongoid::Timestamps
  include Impressionist::Impressionable
  
  is_impressionable :counter_cache => { :column_name => :view_count }
  
  field :key
  field :view_count, :type => Integer, :default => 0
  #field :cloud_amper,:type: Integer,:default=> 0 
  belongs_to :module_app
  
  def cloud_amper
    for_now = {:start_at=>20.days.ago,:end_at=>Time.now}
    for_yesterday = {:start_at=>19.days.ago,:end_at=>1.days.ago}


    range = self.class.all.collect{ |tag|
      get_impressionist_diff(tag)
    }
    range.sort!.reverse!.uniq!
    offset_size = range.size+4
    section_3 =  range.last..range[-(offset_size/4)]
    section_2 =  range[-(offset_size/4)-1]..range[-2*(offset_size/4)] rescue nil
    section_1 =  range[-2*(offset_size/4)-1]..range[1]  rescue nil


    case get_impressionist_diff
    when range.first
      return :heading1
    when section_1
      return :heading2
    when section_2
      return :heading3
    when section_3
      return :heading4
    end
    
  end

protected
  def get_impressionist_diff(item_tag = self)
      for_now = item_tag.impressions.where(:created_at.gte=> 20.days.ago,:created_at.lte => Time.now).count
      for_yesterday = item_tag.impressions.where(:created_at.gte=> 21.days.ago,:created_at.lte => 1.days.ago).count
      for_now - for_yesterday
  end

end