module TroleGroups
  class Config
    module Schema   
      autoload :Helpers,            'trole_groups/config/schema/helpers'
      autoload :RoleGroupHelpers,   'trole_groups/config/schema/role_group_helpers'      
          
      def configure_models
        configure_generic
        configure_field if auto_config?(:fields)
        configure_relation if auto_config?(:relations)
      end         
      
      def configure_generic                    
        subject_class.send(:attr_accessor, role_field)  if generic? || orm == :generic # create troles accessor      
      end
      
      # Adapter should customize this as needed 
      def configure_field
      end
      
      # Adapter should customize this as needed 
      def configure_relation
      end
      
      # Sets the role model to use
      # allows different role subject classes (fx User Accounts) to have different role schemas
      # @param [Class] the model class
      def rolegroup_model= model_class
        @rolegroup_model = model_class.to_s and return if model_class.any_kind_of?(Class, String, Symbol)
        raise "The rolegroup model must be a Class, was: #{model_class}"
      end
      
      # Gets the role model to be used
      # see (#role_model=)
      # @return [Class] the model class (defaults to Role)
      def rolegroup_model
        @rolegroup_model_found ||= begin
          models = [@rolegroup_model, role_group_class_name].select do |class_name|
            try_class(class_name.to_s.camelize)
          end.compact
          raise "No #{role_group_class_name} class defined, define a #{role_group_class_name} class or set which class to use, using the :rolegroup_model option on configuration" if models.empty?
          models.first.to_s.constantize
        end
      end
      
      protected
      
      def role_group_class_name
        'RoleGroup'
      end
      
      def try_class clazz
        begin
          clazz = clazz.constantize if clazz.kind_of?(String)
          clazz
        rescue          
          false
        end
      end

      include Helpers
      include RoleGroupHelpers
    end
  end
end