# frozen_string_literal: true

module Kanal
  module Core
    module Logging
      class CompositeLogger
        # Property allowed_methods defines which methods can be called.
        # These methods mirror standard Logger methods.
        def initialize
          @loggers = []
          @allowed_methods = [:debug, :info, :warn, :error, :fatal, :unknown]
        end

        def add_logger(logger)
          @loggers << logger
        end

        # This method gets called when calling any method in @allowed_methods.
        # It passes message string to method call of every added logger.
        #
        # @param method [Symbol]
        # @param message [String]
        def method_missing(method, message)
          # Getting caller class name to put into log message later.
          begin
            caller_class_name = "[" + caller[0].split(".rb").first.split("/").last.split('_').collect(&:capitalize).join + "]"
          rescue
            caller_class_name = "[ErrorGettingClassName]"
          end

          raise "Wrong method called for CompositeLogger" unless @allowed_methods.include? method

          @loggers.each do |logger|
            # progname is a property of standard Logger. It is a prefix for log message.
            # In our case progname is used to store class name of class which calls for CompositeLogger methods.
            logger.progname = caller_class_name
            logger.send method, message
          end
        end
      end
    end
  end
end