module AutoDemeter

# File lib/auto_demeter/methods.rb, line 42
def method_missing(method_id, *args, &block)
  begin
    super
  rescue NoMethodError, NameError => e
    if match_data=method_id.to_s.match(reflected_children_regex)
      association_name=self.respond_to?(match_data[1]) ? match_data[1] : "#{self.class.name.underscore}_#{match_data[1]}"
      begin
        if association=send(association_name)
          association.send(match_data[2], *args, &block)
        else
          nil
        end
      rescue Exception
        raise e
      end
    else
      raise
    end
  end
end

# File lib/auto_demeter/methods.rb, line 21
def respond_through_association?(method_id)
  if children_names && (match_data=method_id.to_s.match(reflected_children_regex)) && match_data[1].present?
    association_name=(self.methods.include?(match_data[1].intern) || self.methods.include?(match_data[1])) ? match_data[1] : "#{self.class.name.underscore}_#{match_data[1]}"
    begin
      if association=send(association_name)
        association.respond_to?(match_data[2])
      elsif association.nil?
        association_name.camelize.constantize.new.respond_to?(match_data[2])
      end
    rescue
      false
    end
  else
    false
  end
end

# File lib/auto_demeter/methods.rb, line 38
def respond_to?(method_id, public=false)
  super || (method_id != :base_name && respond_through_association?(method_id))
end

# File lib/auto_demeter/methods.rb, line 3
def base_names
  @base_names||=self.class.reflect_on_all_associations.find_all { |x| [:has_one, :belongs_to].include?(x.send(:macro)) }.map { |x| x.send(:name).to_s } rescue []
end

# File lib/auto_demeter/methods.rb, line 7
def children_names
  if @children_names.nil?
    class_name=base_names.map { |x| x.gsub(/^#{self.class.name.underscore}_/, '') }
    class_name=class_name | base_names.map { |x| x.gsub(/^#{self.base_name.underscore}_/, '') } if self.respond_to?(:base_name) && self.class.name!=self.base_name
    @children_names=base_names | class_name
  end
  @children_names
end

# File lib/auto_demeter/methods.rb, line 16
def reflected_children_regex
  Regexp.new('^(' << children_names.join('|') << ')_(.*[^=])$')
end