class Rubocop::CLI

def raw_target_files(args)
  return Dir['**/*.rb'] if args.empty?
  if glob = args.detect { |arg| arg =~ /\*/ }
    Dir[glob]
  else
    args
  end
end

def run(args = ARGV)
  options = { :mode => :default }
  OptionParser.new do |opts|
    opts.banner = "Usage: rubocop [options] [file1, file2, ...]"
    opts.on("-v", "--[no-]verbose", "Run verbosely") do |v|
      options[:verbose] = v
    end
    opts.on("-e", "--emacs", "Emacs style output") do
      options[:mode] = :emacs_style
    end
  end.parse!(args)
  cops = Cop::Cop.all
  total_offences = 0
  target_files(args).reject { |f| File.directory?(f) }.each do |file|
    report = Report.create(file, options[:mode])
    source = File.readlines(file).map { |line|
      enc = line.encoding.name
      # Get rid of invalid byte sequences
      line.encode!('UTF-16', enc, :invalid => :replace, :replace => '')
      line.encode!(enc, 'UTF-16')
      line.chomp
    }
    cops.each do |cop_klass|
      cop = cop_klass.new
      cop.inspect_source(file, source)
      total_offences += cop.offences.count
      report << cop if cop.has_report?
    end
    report.display unless report.empty?
  end
  print "\n#{target_files(args).count} files inspected, "
  puts "#{total_offences} offences detected"
  return total_offences == 0 ? 0 : 1
end

def target_files(args)
  raw_target_files(args).reject { |name| name =~ /_flymake/ }
end