# frozen_string_literal: true

require_relative '../../puppet/application'

class Puppet::Application::Filebucket < Puppet::Application
  environment_mode :not_required

  option("--bucket BUCKET", "-b")
  option("--debug", "-d")
  option("--fromdate FROMDATE", "-f")
  option("--todate TODATE", "-t")
  option("--local", "-l")
  option("--remote", "-r")
  option("--verbose", "-v")

  attr_reader :args

  def summary
    _("Store and retrieve files in a filebucket")
  end

  def digest_algorithm
    Puppet.default_digest_algorithm
  end

  def help
    <<~HELP

      puppet-filebucket(8) -- #{summary}
      ========

      SYNOPSIS
      --------
      A stand-alone Puppet filebucket client.


      USAGE
      -----
      puppet filebucket <mode> [-h|--help] [-V|--version] [-d|--debug]
        [-v|--verbose] [-l|--local] [-r|--remote] [-s|--server <server>]
        [-f|--fromdate <date>] [-t|--todate <date>] [-b|--bucket <directory>]
        <file> <file> ...

      Puppet filebucket can operate in three modes, with only one mode per call:

      backup:
        Send one or more files to the specified file bucket. Each sent file is
        printed with its resulting #{digest_algorithm} sum.

      get:
        Return the text associated with an #{digest_algorithm} sum. The text is printed to
        stdout, and only one file can be retrieved at a time.

      restore:
        Given a file path and an #{digest_algorithm} sum, store the content associated with
        the sum into the specified file path. You can specify an entirely new
        path to this argument; you are not restricted to restoring the content
        to its original location.

      diff:
        Print a diff in unified format between two checksums in the filebucket
        or between a checksum and its matching file.

      list:
        List all files in the current local filebucket. Listing remote
        filebuckets is not allowed.

      DESCRIPTION
      -----------
      This is a stand-alone filebucket client for sending files to a local or
      central filebucket.

      Note that 'filebucket' defaults to using a network-based filebucket
      available on the server named 'puppet'. To use this, you'll have to be
      running as a user with valid Puppet certificates. Alternatively, you can
      use your local file bucket by specifying '--local', or by specifying
      '--bucket' with a local path.

      > **Note**: Enabling and using the backup option, and by extension the
        filebucket resource, requires appropriate planning and management to ensure
        that sufficient disk space is available for the file backups. Generally, you
        can implement this using one of the following two options:
        - Use a `find` command and `crontab` entry to retain only the last X days
        of file backups. For example:

        ```shell
        find /opt/puppetlabs/server/data/puppetserver/bucket -type f -mtime +45 -atime +45 -print0 | xargs -0 rm
        ```

        - Restrict the directory to a maximum size after which the oldest items are removed.


      OPTIONS
      -------
      Note that any setting that's valid in the configuration
      file is also a valid long argument. For example, 'ssldir' is a valid
      setting, so you can specify '--ssldir <directory>' as an
      argument.

      See the configuration file documentation at
      https://puppet.com/docs/puppet/latest/configuration.html for the
      full list of acceptable parameters. A commented list of all
      configuration options can also be generated by running puppet with
      '--genconfig'.

      * --bucket:
        Specify a local filebucket path. This overrides the default path
        set in '$clientbucketdir'.

      * --debug:
        Enable full debugging.

      * --fromdate:
        (list only) Select bucket files from 'fromdate'.

      * --help:
        Print this help message.

      * --local:
        Use the local filebucket. This uses the default configuration
        information and the bucket located at the '$clientbucketdir'
        setting by default. If '--bucket' is set, puppet uses that
        path instead.

      * --remote:
        Use a remote filebucket. This uses the default configuration
        information and the bucket located at the '$bucketdir' setting
        by default.

      * --server_list:
        A list of comma separated servers; only the first entry is used for file storage.
        This setting takes precidence over `server`.

      * --server:
        The server to use for file storage. This setting is only used if `server_list`
        is not set.

      * --todate:
        (list only) Select bucket files until 'todate'.

      * --verbose:
        Print extra information.

      * --version:
        Print version information.

      EXAMPLES
      --------
          ## Backup a file to the filebucket, then restore it to a temporary directory
          $ puppet filebucket backup /etc/passwd
          /etc/passwd: 429b225650b912a2ee067b0a4cf1e949
          $ puppet filebucket restore /tmp/passwd 429b225650b912a2ee067b0a4cf1e949

          ## Diff between two files in the filebucket
          $ puppet filebucket -l diff d43a6ecaa892a1962398ac9170ea9bf2 7ae322f5791217e031dc60188f4521ef
          1a2
          > again

          ## Diff between the file in the filebucket and a local file
          $ puppet filebucket -l diff d43a6ecaa892a1962398ac9170ea9bf2 /tmp/testFile
          1a2
          > again

          ## Backup a file to the filebucket and observe that it keeps each backup separate
          $ puppet filebucket -l list
          d43a6ecaa892a1962398ac9170ea9bf2 2015-05-11 09:27:56 /tmp/TestFile

          $ echo again >> /tmp/TestFile

          $ puppet filebucket -l backup /tmp/TestFile
          /tmp/TestFile: 7ae322f5791217e031dc60188f4521ef

          $ puppet filebucket -l list
          d43a6ecaa892a1962398ac9170ea9bf2 2015-05-11 09:27:56 /tmp/TestFile
          7ae322f5791217e031dc60188f4521ef 2015-05-11 09:52:15 /tmp/TestFile

          ## List files in a filebucket within date ranges
          $ puppet filebucket -l -f 2015-01-01 -t 2015-01-11 list
          <Empty Output>

          $ puppet filebucket -l -f 2015-05-10 list
          d43a6ecaa892a1962398ac9170ea9bf2 2015-05-11 09:27:56 /tmp/TestFile
          7ae322f5791217e031dc60188f4521ef 2015-05-11 09:52:15 /tmp/TestFile

          $ puppet filebucket -l -f "2015-05-11 09:30:00" list
          7ae322f5791217e031dc60188f4521ef 2015-05-11 09:52:15 /tmp/TestFile

          $ puppet filebucket -l -t "2015-05-11 09:30:00" list
          d43a6ecaa892a1962398ac9170ea9bf2 2015-05-11 09:27:56 /tmp/TestFile
          ## Manage files in a specific local filebucket
          $ puppet filebucket -b /tmp/TestBucket backup /tmp/TestFile2
          /tmp/TestFile2: d41d8cd98f00b204e9800998ecf8427e
          $ puppet filebucket -b /tmp/TestBucket list
          d41d8cd98f00b204e9800998ecf8427e 2015-05-11 09:33:22 /tmp/TestFile2

          ## From a Puppet Server, list files in the server bucketdir
          $ puppet filebucket -b $(puppet config print bucketdir --section server) list
          d43a6ecaa892a1962398ac9170ea9bf2 2015-05-11 09:27:56 /tmp/TestFile
          7ae322f5791217e031dc60188f4521ef 2015-05-11 09:52:15 /tmp/TestFile

      AUTHOR
      ------
      Luke Kanies


      COPYRIGHT
      ---------
      Copyright (c) 2011 Puppet Inc., LLC Licensed under the Apache 2.0 License

    HELP
  end

  def run_command
    @args = command_line.args
    command = args.shift
    return send(command) if %w{get backup restore diff list}.include? command

    help
  end

  def get
    digest = args.shift
    out = @client.getfile(digest)
    print out
  end

  def backup
    raise _("You must specify a file to back up") unless args.length > 0

    args.each do |file|
      unless Puppet::FileSystem.exist?(file)
        $stderr.puts _("%{file}: no such file") % { file: file }
        next
      end
      unless FileTest.readable?(file)
        $stderr.puts _("%{file}: cannot read file") % { file: file }
        next
      end
      digest = @client.backup(file)
      puts "#{file}: #{digest}"
    end
  end

  def list
    fromdate = options[:fromdate]
    todate = options[:todate]
    out = @client.list(fromdate, todate)
    print out
  end

  def restore
    file = args.shift
    digest = args.shift
    @client.restore(file, digest)
  end

  def diff
    raise Puppet::Error, _("Need exactly two arguments: filebucket diff <file_a> <file_b>") unless args.count == 2

    left = args.shift
    right = args.shift
    if Puppet::FileSystem.exist?(left)
      # It's a file
      file_a = left
      checksum_a = nil
    else
      file_a = nil
      checksum_a = left
    end
    if Puppet::FileSystem.exist?(right)
      # It's a file
      file_b = right
      checksum_b = nil
    else
      file_b = nil
      checksum_b = right
    end
    if (checksum_a || file_a) && (checksum_b || file_b)
      Puppet.info(_("Comparing %{checksum_a} %{checksum_b} %{file_a} %{file_b}") % { checksum_a: checksum_a, checksum_b: checksum_b, file_a: file_a, file_b: file_b })
      print @client.diff(checksum_a, checksum_b, file_a, file_b)
    else
      raise Puppet::Error, _("Need exactly two arguments: filebucket diff <file_a> <file_b>")
    end
  end

  def setup
    Puppet::Log.newdestination(:console)

    @client = nil
    @server = nil

    Signal.trap(:INT) do
      $stderr.puts _("Cancelling")
      exit(1)
    end

    if options[:debug]
      Puppet::Log.level = :debug
    elsif options[:verbose]
      Puppet::Log.level = :info
    end

    exit(Puppet.settings.print_configs ? 0 : 1) if Puppet.settings.print_configs?

    require_relative '../../puppet/file_bucket/dipper'
    begin
      if options[:local] or options[:bucket]
        path = options[:bucket] || Puppet[:clientbucketdir]
        @client = Puppet::FileBucket::Dipper.new(:Path => path)
      else
        session = Puppet.lookup(:http_session)
        api = session.route_to(:puppet)

        @client = Puppet::FileBucket::Dipper.new(Server: api.url.host, Port: api.url.port)
      end
    rescue => detail
      Puppet.log_exception(detail)
      exit(1)
    end
  end
end
