#
# Copyright 2015, Noah Kantrowitz
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#


module KnifeAdvisor
  class RingBuffer
    def initialize(values=[])
      @values = values.shuffle
      @i = 0
    end

    def advance!
      @i += 1
      if @i >= @values.length
        @i = 0
        @values.shuffle!
      end
    end

    def next
      @values[@i].tap { advance! }
    end
  end
end
