require 'rack/utils'

gem 'hpricot', '>=0.8.1'
require 'hpricot'

module Rack
  class StaticAssets
    include Rack::Utils
    
    FORMAT = %{%s - [%s] [%s] "%s %s%s %s" (%s) %d %d %0.4f\n}
    
    def initialize(app, opts = {})
      @app = app
      
      @opts = { :assets => "http://www.google.com/jsapi" }
      @opts.merge! opts
    end

    def call(env)
      began_at = Time.now
      status, headers, response = @app.call(env)
      headers = HeaderHash.new(headers)

      if !STATUS_WITH_NO_ENTITY_BODY.include?(status) &&
         !headers['transfer-encoding'] &&
          headers['content-type'] &&
          headers['content-type'].include?("text/html")

        content = ""
        response.each { |part| content += part }
        doc = Hpricot(content)
        
#         nodes = doc.search(@opts[:element])
#         nodes.each do |node|
#           s = node.inner_html || "[++where is the code?++]"
#           node.parent.swap(send(@highlighter, s))
#         end

        body = doc.to_html
        
        # headers['content-length'] = body.bytesize.to_s
        headers.delete('content-length') # will be set by Rack::ContentLength

        log(env, status, headers, began_at) if @opts[:logging]
        [status, headers, [body]]
      else
        [status, headers, response]  
      end
    end
    
    private

    def log(env, status, headers, began_at)
      # lilith.local [coderay] text/html [26/may/2009 12:00:00] "GET / HTTP/1.1" 200 ? ?\n
      now = Time.now
       logger = env['rack.errors']
      logger.write FORMAT % [
        env['HTTP_X_FORWARDED_FOR'] || env["REMOTE_ADDR"] || "-",
        "static assets",
        now.strftime("%d/%b/%Y %H:%M:%S"),
        env["REQUEST_METHOD"],
        env["PATH_INFO"],
        env["QUERY_STRING"].empty? ? "" : "?"+env["QUERY_STRING"],
        env["HTTP_VERSION"],
        headers["content-type"] || "unknown",
        status.to_s[0..3],
        headers['content-length'],
        now - began_at
      ]
    end
    
    def rewrite_asset_tag(element)
    end
    
  end
end