require 'redis'

module Legion
  module Cache
    module Redis
      extend self

      def client
        return @client unless @client.nil?

        @client = ::Redis.new
        @connected = true
        @client
      end

      def connected?
        @connected ||= false
      end

      def close
        client.close
      end

      def restart
        close
        @client = nil
        client
      end

      def get(key)
        client.get(key)
      end
      alias fetch get

      def set(key, value, ttl: nil)
        args = {}
        args[:ex] = ttl unless ttl.nil?
        client.set(key, value, **args) == 'OK'
      end

      def delete(key)
        client.del(key) == 1
      end

      def flush
        client.flushdb == 'OK'
      end
    end
  end
end