# -------------------------------------------------------------------
# Copyright (c) 2009-2010 Sem4r sem4ruby@gmail.com
#
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# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# -------------------------------------------------------------------

module Sem4r

  class Criterion < Base

    enum :Types,             [:Keyword, :Placement]
    enum :KeywordMatches,    [:EXACT, :BROAD, :PHRASE]

    attr_reader   :ad_group
    attr_accessor :type

    def initialize( ad_group )
      super( ad_group.adwords, ad_group.credentials )
      @ad_group = ad_group
    end

    def saved?
      !@id.nil?
    end

    def id
      @id
    end

    def self.from_element( ad_group, el )
      xml_type =       el.elements["Criterion.Type"].text.strip
      #      klass = Module::const_get(type)
      #      klass.from_element(ad_group, el)
      case xml_type
      when Keyword
        CriterionKeyword.from_element(ad_group, el)
      when Placement
        CriterionPlacement.from_element(ad_group, el)
      end
    end

    ############################################################################
    # ad params management

    def ad_param(index = nil, text = nil, &block)
      ad_group.ad_param(self, index, text, &block)
    end

  end
end