class ActiveFedora::Attributes::PropertyBuilder

def self.define_accessors(model, reflection, options = {})
  if reflection.multiple?
    super
  else
    mixin = model.generated_property_methods
    name = reflection.term
    define_singular_readers(mixin, name)
    define_singular_id_reader(mixin, name) unless options[:cast] == false
    define_singular_writers(mixin, name)
  end
end

def self.define_singular_id_reader(mixin, name)
  mixin.class_eval <<-CODE, __FILE__, __LINE__ + 1
    def #{name}_id(*args)
      get_values(:#{name}, :cast => false)
    end
  CODE
end

def self.define_singular_readers(mixin, name)
  mixin.class_eval <<-CODE, __FILE__, __LINE__ + 1
    def #{name}(*args)
      vals = get_values(:#{name})
      return nil unless vals
      raise ActiveFedora::ConstraintError, "Expected \\"#{name}\\" to have 0-1 statements, but there are \#{vals.size}" if vals.size > 1
      vals.first
    end
  CODE
end

def self.define_singular_writers(mixin, name)
  mixin.class_eval <<-CODE, __FILE__, __LINE__ + 1
    def #{name}=(value)
      if value.respond_to?(:each) # singular
        raise ArgumentError, "You attempted to set the property `#{name}' to an enumerable value. However, this property is declared as singular."
      end
      set_value(:#{name}, value)
    end
  CODE
end

def self.define_writers(mixin, name)
  mixin.class_eval <<-CODE, __FILE__, __LINE__ + 1
    def #{name}=(value)
      if value.present? && !value.respond_to?(:each)
        raise ArgumentError, "You attempted to set the property `#{name}' to a scalar value. However, this property is declared as being multivalued."
      end
      set_value(:#{name}, value)
    end
  CODE
end

def build(&block)
  # TODO: remove this block stuff
  NodeConfig.new(name, options[:predicate], options.except(:predicate)) do |config|
    config.with_index(&block) if block_given?
  end
end