module ElasticAPM::Log

def debug(msg, *args, &block)
  log(:debug, msg, *args, &block)
end

def error(msg, *args, &block)
  log(:error, msg, *args, &block)
end

def fatal(msg, *args, &block)
  log(:fatal, msg, *args, &block)
end

def info(msg, *args, &block)
  log(:info, msg, *args, &block)
end

def log(lvl, msg, *args)
  return unless logger
  formatted_msg = prepend_prefix(format(msg.to_s, *args))
  return logger.send(lvl, formatted_msg) unless block_given?
  # TODO: dont evaluate block if level is higher
  logger.send(lvl, "#{formatted_msg}\n#{yield}")
end

def logger
  return false unless (config = instance_variable_get(:@config))
  config.logger
end

def prepend_prefix(str)
  "#{PREFIX}#{str}"
end

def warn(msg, *args, &block)
  log(:warn, msg, *args, &block)
end