#!/usr/bin/env ruby
$VERBOSE = true

require 'optparse'
require_relative '../lib/paperback'

BaseName = File.basename($0)

def main
  options = {}

  optparse = OptionParser.new do |opts|
    opts.banner = <<-EOM
usage: #{BaseName} [OPTION]... INPUT OUT_PDF

Create a printable PDF backup of INPUT file and write to OUT_PDF. The saved PDF
file will be suitable for printing. By default, the paper backup will contain
the input data encoded as a QR code for ease of scanning and as sixword-encoded
English text for more natural paper printing.

In order to prevent the input content from being exposed to the printer, by
default, the input content will be encrypted with a symmetric passphrase that
is echoed to the terminal. There will be a placeholder in the PDF where you can
manually add the passphrase by hand and pen.

For example:

    # Create a backup of secret.key in backup.pdf
    #{BaseName} secret.key backup.pdf

Options:
    EOM

    opts.on('-h', '--help', 'Display this message') do
      STDERR.puts opts, ''
      exit 0
    end
    opts.on('--version', 'Print version number') do
      puts 'paperback ' + Paperback::VERSION
      exit 0
    end
    opts.on('-v', '--verbose', 'Be more verbose', ' ') do
      Paperback.log_level -= 1
    end

    #

    opts.on('-c', '--comment TEXT', 'Add TEXT comment to output') do |val|
      options[:comment] = val
    end

    opts.on('--no-encrypt', 'Skip encryption of input') do |val|
      options[:encrypt] = val
    end

    opts.on('--no-base64', "Don't append plain Base64 paragraph") do |val|
      options[:include_base64] = val
    end

    opts.on('--passphrase-out FILE', 'Write generated passphrase to FILE',
            ' ') do |val|
      options[:passphrase_file] = val
    end

    #

    opts.on('--sixword-font-size SIZE', 'Size of sixword text') do |val|
      options[:extra_draw_opts] ||= {}
      options[:extra_draw_opts][:sixword_font_size] = Float(val)
    end
  end

  optparse.parse!

  case ARGV.length
  when 2
    options[:input] = ARGV.fetch(0)
    options[:output] = ARGV.fetch(1)
  else
    STDERR.puts optparse, ''
    exit 1
  end

  Paperback::CLI.create_backup(**options)
end

main