class Item
  attr_accessor :type_attributes
  define_creatable
  define_editor :item_editor
  define_editor_field({:name=>"vtag", :filter=>:filt_to_tag, :type=>:vtag})
  define_editor_field({:name=>"zone", :filter=>:filt_to_area, :type=>:namespace})
  define_editor_field({:name=>"name", :filter=>:filt_none})
  define_editor_field({:name=>"type", :filter=>:filt_to_itype, 
    :proc_fun=>proc do |ed, ch, obj, arg| 
      found = obj.type_attributes.collect {|att| att.type}

      filtered = (arg.collect {|att| found.include?(att.type) ? nil : att}).compact

      if filtered.empty?
        ch.view "Type already exists on this item." + ENDL
      else
        obj.type_attributes += filtered
        ch.view "Attribute added." + ENDL
      end
    end,
    :display=>proc do |obj|
      types = obj.types
      ["#{mxptag("send type prompt")}#R[#Wtype#R]:#{mxptag('/send')} #n#{if types.empty? then "[none]" else types end}"]
    end
  })
  define_editor_field({:name=>"v",:filter=>:filt_none, :arg_type=>:arg_str,
    :proc_fun=> lambda do |ed, ch, obj, arg|
      args = arg.multi_args

      i = Integer(args[0]) rescue nil

      if i == nil
        ch.view "Not a valid item property." + ENDL
        return
      end

      found = obj.type_attributes[i-1]

      if found == nil
        ch.view "Not a valid item property." + ENDL
        return
      end

      if args[1] == "delete"
        # then we delete this type right now.
        obj.type_attributes.delete_at(i-1) # done
        ch.view "Item property deleted." + ENDL
        return
      end
      
      ch.editing.unshift(found) # edit the one found.
      ch.view "Editing item property." + ENDL
    end,

    :display=>proc do |obj|
      arr = []
      count = 0
      obj.type_attributes.each do |att|
        count += 1
        arr << ["#{mxptag("send v#{count}")}#R[#Wv#{count}#R]:#{mxptag('/send')}#n #{mxptag("send 'v#{count} delete'")}#R[#Wv#{count} delete#R]#n#{mxptag('/send')} #{att.to_s}"]
      end
      arr.flatten
    end
  })



  def self.create ch
    item = self.new
    item.namespace = ch.in_room.namespace  # have to set it so gen_generic_tag will work correctly.
    item.assign_tag Tag.gen_generic_tag(item), ch.in_room.namespace
    return item
  end
end