require 'tmpdir'
require 'logger'
require 'xi/error_log'

module Xi
  module Logger
    LOG_FILE = File.join(Dir.tmpdir, 'xi.log')

    def logger
      @@logger ||= begin
        logger = ::Logger.new(LOG_FILE)
        logger.formatter = proc do |severity, datetime, progname, msg|
          "[#{datetime.strftime("%F %T %L")}] #{msg}\n"
        end
        logger
      end
    end

    def debug(*args)
      logger.debug(args.map(&:to_s).join(' '.freeze))
    end

    def error(error)
      logger.error("#{error}:\n#{error.backtrace.join("\n".freeze)}")
      ErrorLog.instance << error.to_s
    end
  end
end