# class Tag < ProtoTag
#   belongs_to :module_app

# end

class Tag
  include Mongoid::Document
  include Mongoid::Timestamps
  include Impressionist::Impressionable
  
  is_impressionable :counter_cache => { :column_name => :view_count }
  
  field :name, localize: true
  field :cloud_view_count, type: Integer, default: 0
  field :is_default, type: Boolean, default: false
  field :view_count, type: Integer, default: 0

  belongs_to :tag_lease, polymorphic: true
  has_many :taggings, dependent: :destroy

  validates :name, :at_least_one => true

  before_destroy :destroy_module_tag, if: Proc.new { |tag| tag.tag_lease_type.eql?("ModuleTag") }

  def self.sorted_for_cloud
    tags = {}
    self.all.each{ |tag|
      tags.merge!({tag => self.get_impressionist(tag)})
    }
    if !tags.blank?
      sorted_tags = tags.sort{|a,b| a[1]<=>b[1]}.reverse
      sorted_tags[0][1] = :hot1
      offset = (sorted_tags.size - 1) / 3
      i = 1
      class_i = 2
      sorted_tags[1..-1].collect!{ |x|
        x[1] = "hot#{class_i}"
        i == offset ? i = 1 : i += 1 if class_i < 4
        class_i += 1 if i == offset && class_i < 4
      }
      sorted_tags
    else
      []
    end
  end

  protected
  
  def self.get_impressionist(item_tag = self)
    item_tag.impressions.where(:created_at.gte=> 14.days.ago,:created_at.lte => Time.now).count
  end

  private

  def destroy_module_tag
    ModuleTag.without_callback(:destroy, :before, :destroy_tag) do
      self.tag_lease.destroy
    end
  end

end