#!/usr/bin/ruby

def print_usage
  puts <<End
Usage: #{File.basename($0)} file
Usage: echo 'JavaScript input' | #{File.basename($0)}

Using this is a vim filter command
----------------------------------

This can also be used as a vim filter command (see help filter).

Simply select the lines to be beautified in visual mode and type .!beautify_js.

Better yet, create a vim command to execute it for you, and put that in your .vimrc:
  command! -range=% -nargs=0 BeautifyJavascript <line1>,<line2>!JSBEAUTY=<q-args> #{$0}

This will allow you to invoke the command when editing a file as
:BeautifyJavascript

Additionally you can provide some of the following command line arguments:
  -i <#>   -- The number of spaces to indent the code;use 1 to use tabs (Def:2)
  -n       -- Preserve line feeds
  -p       -- A mode to place a space between function and () for jslint.

Examples would be:

:BeautifyJavascript -i 4 -n
:BeautifyJavascript -n

Then you can simply type BeautifyJavascript to process the entire buffer or select a range of lines to only pass those lines through the filter.
End
  exit
end


if STDIN.tty?
  if ARGV.size >= 1
    # Get the absolute path of the filename given
    require 'pathname'
    last = ARGV.size - 1
    args = ""
    path = ""
    ARGV.size.times {|i| 
      if i == last 
        path = Pathname.new(ARGV[i]).realpath.to_s
      else
        if i > 0
          args += " "
        end
        args += "#{ARGV[i]}"
      end
    }
    #path = Pathname.new(ARGV[0]).realpath.to_s
  else
    print_usage
  end
else
  # Assume they are piping the input in. Save that input in a temporary file and pass that file to beautify-cl.js
  require 'tempfile'
  file = Tempfile.new('beautify_js')
  file.puts STDIN.read
  file.close
  args = ENV['JSBEAUTY'] || ""
  path = file.path
end
#system "cat #{path}"


# Change directory so that the load() calls in beautify-cl.js are able to find the files they need
Dir.chdir File.dirname(File.symlink?(__FILE__) ? File.readlink(__FILE__) : __FILE__)
Dir.chdir '..'
#puts Dir.getwd


command = "rhino beautify-cl.js '#{args} #{path}' 2>&1"
#puts command
#output = `#{command}`
system command