module Jekyll
  # Compiled LESS CSS into CSS. You must specify an empty YAML front matter
  # at the beginning of the file.
  # .less -> .css
  class LessConverter < Converter
    safe true
    priority :low
    pygments_prefix "\n"
    pygments_suffix "\n"

    def setup
      return if @setup
      require 'less'
      @setup = true
    rescue LoadError
      STDERR.puts 'You are missing a library required for less. Please run:'
      STDERR.puts '  $ [sudo] gem install less'
      raise FatalException.new("Missing dependency: less")
    end

    def matches(ext)
      ext =~ /less/i
    end

    def output_ext(ext)
      ".css"
    end

    def convert(content)
      setup
      if content =~ /\@import\s["'](\w+)["'];/ then
        file = nil
        if File.extname($1) != 'less' then file = Dir.getwd()+'/_temp/stylesheets/'+$1+'.less'
        else file = Dir.getwd()+'_temp/stylesheets/'+$1 end
        included = File.open(file)
        included_contents = included.read
        content = included_contents << content
        content.gsub!(/\@import\s["'](\w+)["'];/,'')
      end
    
      begin
			   parser = Less::Parser.new
				 parser.parse(content).to_css(:compress => true)
#        Less::Engine.new(content).to_css
      rescue => e
        puts "Less Exception: #{e.message}"
      end
    end
  end
end