class Rouge::CLI

def self.class_from_arg(arg)
  case arg
  when 'version', '--version', '-v'
    Version
  when 'help', nil
    Help
  when 'highlight', 'hi'
    Highlight
  when 'style'
    Style
  when 'list'
    List
  when 'guess'
    Guess
  end
end

def self.doc
  return enum_for(:doc) unless block_given?
  yield %|usage: rougify {global options} [command] [args...]|
  yield %||
  yield %|where <command> is one of:|
  yield %|	highlight	#{Highlight.desc}|
  yield %|	help		#{Help.desc}|
  yield %|	style		#{Style.desc}|
  yield %|	list		#{List.desc}|
  yield %|	guess		#{Guess.desc}|
  yield %|	version		#{Version.desc}|
  yield %||
  yield %|global options:|
  yield %[	--require|-r <fname>	require <fname> after loading rouge]
  yield %||
  yield %|See `rougify help <command>` for more info.|
end

def self.error!(msg, status=1)
  raise Error.new(msg, status)
end

def self.normalize_syntax(argv)
  out = []
  argv.each do |arg|
    case arg
    when /^(--\w+)=(.*)$/
      out << $1 << $2
    when /^(-\w)(.+)$/
      out << $1 << $2
    else
      out << arg
    end
  end
  out
end

def self.parse(argv=ARGV)
  argv = normalize_syntax(argv)
  while (head = argv.shift)
    case head
    when '-h', '--help', 'help', '-help'
      return Help.parse(argv)
    when '--require', '-r'
      require argv.shift
    else
      break
    end
  end
  klass = class_from_arg(head)
  return klass.parse(argv) if klass
  argv.unshift(head) if head
  Highlight.parse(argv)
end

def error!(*a)
  self.class.error!(*a)
end

def initialize(options={})
end