# frozen_string_literal: true

#
# Fluentd Kubernetes Metadata Filter Plugin - Enrich Fluentd events with
# Kubernetes metadata
#
# Copyright 2017 Red Hat, Inc.
#
# 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.
#

require 'lru_redux'

module KubernetesMetadata
  class Stats
    def initialize
      @stats = ::LruRedux::TTL::ThreadSafeCache.new(1000, 3600, true)
    end

    def bump(key)
      @stats[key] = @stats.getset(key) { 0 } + 1
    end

    def set(key, value)
      @stats[key] = value
    end

    def [](key)
      @stats[key]
    end

    def to_s
      "stats - #{@stats.to_a.map { |k, v| "#{k}: #{v}" }.join(', ')}"
    end
  end

  class NoOpStats
    def bump(key)
    end

    def set(key, value)
    end

    def [](key)
    end

    def to_s
    end
  end
end
