class Preview
  include Mongoid::Document
  include Mongoid::Timestamps

  # field :object_f, :type => Hash
  field :object, :type=> Hash
  field :preview_at_link
  field :expired_at , :type => DateTime
  field :link_args, :type => Array
  field :object_class_type
  
  has_many :preview_files, :autosave => true, :dependent => :destroy

  # def object=(params)
  #   save_upload_temp_link(params,"news_bulletin_files_attributes") #unless params[]
  #   self.object_f = params
  # end

  # def object
  #   return object_f
  # end

  # def save_upload_temp_link(params,field_name = "bulletin_files_attributes")
  #   image = preview_files.build(:file=>params[:image])
  #   params[:image] = image.id

  #   params[field_name].each_with_index do |item,index|
  #     bfa = preview_files.build(:file=>params[field_name][index.to_s][:file])
  #     params[field_name][index.to_s] = bfa.id
  #   end unless  params[field_name].nil?
  # end

  # def dig_in_hash(hash,paths_ary)
  #    hash.each_pair do |key,in_hash|
  #       if in_hash.kind_of? Array 
  #         dig_in_array(hash,paths_ary)
  #       elsif in_hash.kind_of? Hash
  #         dig_in_hash(hash,paths_ary)
  #       else
  #         puts("\n End Node: \t #{paths_ary.join } #{in_hash.class} : #{key}##{in_hash}")
  #       end
  #    end
  # end

  # def dig_in_array(array,paths_ary)
  #   array.each do |item|
  #       if item.kind_of? Array 
  #         dig_in_array(hash,paths_ary)
  #       elsif item.kind_of? Hash
  #         dig_in_hash(hash,paths_ary)
  #       else
  #         puts("\n End Node: \t #{paths_ary.join } #{item.class} : {item}")
  #       end
  #    end
  # end


  # def dig_in_hash_old(hash,paths_ary)
  #   hash.each_pair do |k,in_hash|
  #     if (!in_hash.kind_of? Array and !in_hash.kind_of? Hash)
  #       #p "UploadedFile : #{in_hash.is_a? ActionDispatch::Http::UploadedFile}"
  #       #in_hash = "no file" if in_hash.is_a? ActionDispatch::Http::UploadedFile
  #       #in_hash.select{|key,hash| hash.is_a? ActionDispatch::Http::UploadedFile}
  #       puts("\n End Node:# \n")
  #       p "#{paths_ary.join } #{in_hash.class} : #{in_hash}"
  #       #p "UploadedFile(#{in_hash}) : #{in_hash.is_a? ActionDispatch::Http::UploadedFile}"
  #     else
  #       if (!in_hash.first.kind_of? Array and !in_hash.first.kind_of? Hash)
  #         paths_ary << "[#{in_hash.first}]" 
  #       end
  #       puts("\n Go Down [#{in_hash.first}]\n")
  #       dig_in_hash(in_hash,paths_ary)
  #       puts("\n Go Out \n")
  #     end
  #       puts "This is last"
  #       paths_ary.pop  
  #   end
  # end

  def get_arg_hash
    object.slice(*link_args).inject({}){|la,(k,v)| la[k.to_sym] = v; la}
  end

  def get_preview_link
    ap = Rails.application.routes.url_helpers
    ap.send preview_at_link,({:id=>id,:preview=>true}.merge get_arg_hash)
    #func = eval("Rails.application.routes.url_helpers.#{preview_at_link}").send 
  end

  def get_virtual_object
    virtual_object = eval(self.object_class_type).new object
    preview_files.each do |file|
      if file.file_in_array
          eval("virtual_object.#{file.field_name_for_rebuild}.build  :file=>file.file") 
        else
          eval("virtual_object.#{file.field_name_for_rebuild} = file.file")     
      end
    end
    virtual_object
  end

end