module WebTranslateIt

  module Safe

    class Local < Sink

      def active?
        # S3 can't upload from pipe. it needs to know file size, so we must pass through :local
        # will change once we add SSH/FTP sink
        true
      end

      protected

      def path
        @path ||= File.expand_path(expand(config[:local, :path] || raise('missing :local/:path')))
      end

      def save
        puts "command: #{@backup.command}" if verbose?

        # FIXME: probably need to change this to smth like @backup.finalize!
        @backup.path = full_path # need to do it outside DRY_RUN so that it will be avialable for S3 DRY_RUN

        return if dry_run?

        FileUtils.mkdir_p(path) unless File.directory?(path)
        benchmark = Benchmark.realtime do
          system "#{@backup.command}>#{@backup.path}"
        end
        puts("command took #{format('%.2f', benchmark)} second(s).") if verbose?
      end

      def cleanup
        return unless keep = config[:keep, :local]

        puts "listing files #{base}" if verbose?

        # TODO: cleanup ALL zero-length files

        files = Dir["#{base}*"]
                .select { |f| File.file?(f) && File.size(f).positive? }
                .sort

        cleanup_with_limit(files, keep) do |f|
          puts "removing local file #{f}" if dry_run? || verbose?
          File.unlink(f) unless dry_run?
        end
      end

    end

  end

end