module Middleman::CoreExtensions::Compass

def registered(app)
  # Where to look for fonts
  app.set :fonts_dir, "fonts"

  app.extend ClassMethods
    
  require "compass"
  
  # Susy grids
  begin
    require "susy"
  rescue LoadError
  end
  app.after_configuration do
    # Support a stand-alone compass config file
    # Many options are overwritten by Middleman, but the config is a good
    # place to add:
    # * output_style
    # * disable_warnings
    # * sass_options
    # * line_comments
    # * sprite_engine
    # * chunky_png_options
    compass_config_file = File.join(app.root, "compass.config")
    if File.exists?(compass_config_file)
      ::Compass.add_project_configuration(compass_config_file)
    end
    
    ::Compass.configuration do |config|
      config.project_path          = app.root
      config.environment           = :development
      config.cache_path            = File.join(app.root, ".sass-cache")
      
      views_root = File.basename(app.views)
      config.sass_dir              = File.join(views_root, app.css_dir)
      config.css_dir               = File.join(views_root, app.css_dir)
      config.javascripts_dir       = File.join(views_root, app.js_dir)
      config.fonts_dir             = File.join(views_root, app.fonts_dir)
      config.images_dir            = File.join(views_root, app.images_dir)
      
      config.http_images_path = if app.respond_to? :http_images_path
        app.http_images_path
      else
        File.join(app.http_prefix || "/", app.images_dir)
      end
      
      config.http_stylesheets_path = if app.respond_to? :http_css_path
        app.http_css_path
      else
        File.join(app.http_prefix || "/", app.css_dir)
      end
      
      config.http_javascripts_path = if app.respond_to? :http_js_path
        app.http_js_path
      else
        File.join(app.http_prefix || "/", app.js_dir)
      end
      config.http_fonts_path = if app.respond_to? :http_fonts_path
        app.http_fonts_path
      else
        File.join(app.http_prefix || "/", app.fonts_dir)
      end
      
      config.asset_cache_buster :none
      config.output_style = :nested
      # config.add_import_path(config.sass_dir)
    end
    
    # Required for relative paths
    configure :build do
      ::Compass.configuration do |config|
        config.environment = :production
         
        build_root = File.basename(self.build_dir)
        config.css_dir     = File.join(build_root, self.css_dir)
        config.images_dir  = File.join(build_root, self.images_dir)
        config.fonts_dir   = File.join(build_root, self.fonts_dir)
      end
    end
    
    app.execute_after_compass_init!
    app.execute_after_compass_config!
    
    # app.set :sass, ::Compass.configuration.to_sass_engine_options
  end
end