class Sidekiq::RedisConnection

def self.build_client(url, namespace, driver)
  client = Redis.connect(:url => url, :driver => driver)
  if namespace
    Redis::Namespace.new(namespace, :redis => client)
  else
    client
  end
end

def self.create(options={})
  url = options[:url] || determine_redis_provider || 'redis://localhost:6379/0'
  driver = options[:driver] || 'ruby'
  # need a connection for Fetcher and Retry
  size = options[:size] || (Sidekiq.server? ? (Sidekiq.options[:concurrency] + 2) : 5)
  ConnectionPool.new(:timeout => 1, :size => size) do
    build_client(url, options[:namespace], driver)
  end
end

def self.determine_redis_provider
  return ENV['REDISTOGO_URL'] if ENV['REDISTOGO_URL']
  provider = ENV['REDIS_PROVIDER'] || 'REDIS_URL'
  ENV[provider]
end