#! /usr/bin/env ruby
begin
	require 'optparse'
	require 'code_rippa'
rescue LoadError
  $:.unshift File.join(File.dirname(__FILE__), '..', 'lib', )
  require 'code_rippa'
end

options = {}
option_parser = OptionParser.new do |opts|
	opts.banner =<<END

  Usage: code_rippa [options] input_file_or_directory

  Parses input_file or directory and outputs a file named out.tex. 
  It expects both the syntax and theme to be specified.
  
  Example:

     code_rippa -s ruby -t amy path_to_file.rb

     Renders the contents of path_to_file.rb into out.tex.

     Then run
     
     pdflatex out.tex
     
     to generate the PDF output.
        
  "-s" and "-t" are mandatory. The rest are optional.

  Options:
END
	
	opts.on('-s', '--syntax SYNTAX', 'Selected syntax') do |syntax|
		if CodeRippa.supported_syntax.include? syntax
			options[:syntax] = syntax				 
		else	
			raise ArgumentError, "syntax for #{syntax} not found. Use -s to see the list of available syntax."
		end
	end
	
	opts.on('-t', '--theme THEME', 'Selected theme') do |theme|
		if Uv.themes.include? theme
			options[:theme] = theme	 
		else	
			raise ArgumentError, "#{theme} theme not found. Use -l to see the list of available themes."
		end
	end
	
	opts.on('-n', '--list-syntax', 'List all available syntax') do
		puts CodeRippa.supported_syntax.join("\n")
		exit 0
	end
	
	opts.on('-l', '--list-themes', 'List all available themes') do
		puts Uv.themes.join("\n")
		exit 0
	end
	
	opts.on('-c', '--version', 'Display version number') do
		puts CodeRippa::VERSION
		exit 0
	end

	options[:excluded_exts] = []
	opts.on('-x', '--excluded-exts E1,E2,EN', Array, 'Exclude these extensions when processing') do |exts|
		options[:excluded_exts] = exts.sort!
		valid_exts = exts & CodeRippa.supported_exts
		if valid_exts != exts
			invalid_exts = exts - valid_exts
			raise ArgumentError, "These extensions are not supported: #{invalid_exts.join(" ")}. Aborting."
		else
			options[:ex_extensions] = valid_exts
		end
	end
		
	opts.on('-h', '--help', 'Display this screen') do
		puts opts
		exit 0
	end	 
end

begin
	option_parser.parse!	
	if options[:theme] and options[:syntax] and ARGV.size == 1
		if FileTest.file?(ARGV[0])
			CodeRippa.rip_file(ARGV[0], options[:theme], options[:syntax])
		elsif File.directory?(ARGV[0])
		  Dir.chdir(ARGV[0])
			CodeRippa.rip_dir(Dir.pwd, options[:theme], options[:syntax], options[:excluded_exts])
		else
		  raise ArgumentError, "Invalid path. Aborting.\n"
		end
		exit 0
	else
		raise ArgumentError, "Missing arguments. Aborting.\n"
	end
rescue ArgumentError => e
	puts e
	exit 1
end