module Pacto
  class Logger
    include Singleton
    extend Forwardable

    def_delegators :@log, :debug, :info, :warn, :error, :fatal

    def initialize
      log ::Logger.new STDOUT
    end

    def log log
      @log = log
      @log.level = default_level
      @log.progname = 'Pacto'
    end

    def level= level
      @log.level = log_levels.fetch(level, default_level)
    end

    def level
      log_levels.key @log.level
    end

    private

    def default_level
      ::Logger::ERROR
    end

    def log_levels
      {
        debug: ::Logger::DEBUG,
        info:  ::Logger::INFO,
        warn:  ::Logger::WARN,
        error: ::Logger::ERROR,
        fatal: ::Logger::FATAL
      }
    end
  end
end