#! /usr/bin/ruby -w
# coding: utf-8

# Pad 0 onto the first numeric character series in filenames to become the same length.

require "pp"
require "filerenamer.rb"
#require "filerenamer/commander.rb"
#require "filerenamer/optionparser.rb"

PATTERN = /^(\D*)(\d+)(.*)$/

class String
  def num_length
    self =~ PATTERN
    $2.length
  end
end


OPTIONS = {}
op = FileRenamer::OptionParser.new
op.parse!(ARGV)

#pp length
#exit

fr = FileRenamer::Commander.new(op.options, ARGV)

length ||= fr.files.max_by { |str| str.num_length }.num_length
#pp length

fr.execute do |filename|
  filename =~ PATTERN
  head = $1
  body = $2.to_i
  tail = $3

  #pp head
  #pp body
  #pp tail
  #pp length
  #puts

  new_name = head + sprintf("%0#{length}d", body) + tail
  new_name
end