# encoding: utf-8
module Mongoid
  class Criteria
    module Queryable
      module Extensions

        # This module contains additional numeric behaviour.
        module Numeric

          # Evolve the numeric value into a mongo friendly date, aka UTC time at
          # midnight.
          #
          # @example Evolve to a date.
          #   125214512412.1123.__evolve_date__
          #
          # @return [ Time ] The time representation at UTC midnight.
          #
          # @since 1.0.0
          def __evolve_date__
            time = ::Time.at(self).utc
            ::Time.utc(time.year, time.month, time.day, 0, 0, 0, 0)
          end

          # Evolve the numeric value into a mongo friendly time.
          #
          # @example Evolve to a time.
          #   125214512412.1123.__evolve_time__
          #
          # @return [ Time ] The time representation.
          #
          # @since 1.0.0
          def __evolve_time__
            ::Time.at(self).utc
          end

          # Get the integer as a sort direction.
          #
          # @example Get the integer as a sort direction.
          #   1.to_direction
          #
          # @return [ Integer ] self.
          #
          # @since 1.0.0
          def to_direction; self; end

          module ClassMethods

            # Get the object as a numeric.
            #
            # @api private
            #
            # @example Get the object as numeric.
            #   Object.__numeric__("1.442")
            #
            # @param [ Object ] object The object to convert.
            #
            # @return [ Object ] The converted number.
            #
            # @since 1.0.0
            def __numeric__(object)
              object.to_s =~ /(^[-+]?[0-9]+$)|(\.0+$)|(\.$)/ ? object.to_i : Float(object)
            end

            # Evolve the object to an integer.
            #
            # @example Evolve to integers.
            #   Integer.evolve("1")
            #
            # @param [ Object ] object The object to evolve.
            #
            # @return [ Integer ] The evolved object.
            #
            # @since 1.0.0
            def evolve(object)
              __evolve__(object) do |obj|
                __numeric__(obj) rescue obj
              end
            end
          end
        end
      end
    end
  end
end

::Integer.__send__(:include, Mongoid::Criteria::Queryable::Extensions::Numeric)
::Integer.__send__(:extend, Mongoid::Criteria::Queryable::Extensions::Numeric::ClassMethods)

::Float.__send__(:include, Mongoid::Criteria::Queryable::Extensions::Numeric)
::Float.__send__(:extend, Mongoid::Criteria::Queryable::Extensions::Numeric::ClassMethods)