class HscaffoldGenerator < Rails::Generator::NamedBase
  default_options :skip_timestamps => false, :skip_migration => false, :force_plural => false

  attr_reader   :controller_name,
                :controller_class_path,
                :controller_file_path,
                :controller_class_nesting,
                :controller_class_nesting_depth,
                :controller_class_name,
                :controller_underscore_name,
                :controller_singular_name,
                :controller_plural_name
  alias_method  :controller_file_name,  :controller_underscore_name
  alias_method  :controller_table_name, :controller_plural_name

  def initialize(runtime_args, runtime_options = {})
    super

    if @name == @name.pluralize && !options[:force_plural]
      logger.warning "Plural version of the model detected, using singularized version.  Override with --force-plural."
      @name = @name.singularize
      assign_names!(@name)
    end

    @controller_name = @name.pluralize

    base_name, @controller_class_path, @controller_file_path, @controller_class_nesting, @controller_class_nesting_depth = extract_modules(@controller_name)
    @controller_class_name_without_nesting, @controller_underscore_name, @controller_plural_name = inflect_names(base_name)
    @controller_singular_name=base_name.singularize
    if @controller_class_nesting.empty?
      @controller_class_name = @controller_class_name_without_nesting
    else
      @controller_class_name = "#{@controller_class_nesting}::#{@controller_class_name_without_nesting}"
    end
   
  end

  def manifest
    record do |m|
      # Check for class naming collisions.
      m.class_collisions("#{controller_class_name}Controller", "#{controller_class_name}Helper")
      m.class_collisions(class_name)

      # Controller, helper, views, test and stylesheets directories.
      m.directory(File.join('app/controllers', controller_class_path))
      m.directory(File.join('app/views', controller_class_path, controller_file_name))

      for action in scaffold_views
        m.template(
          "view_#{action}.html.erb",
          File.join('app/views', controller_class_path, controller_file_name, "#{action}.html.erb")
        )
      end

      # Layout and stylesheet.
      m.template(
        'controller.rb', File.join('app/controllers', controller_class_path, "#{controller_file_name}_controller.rb")
      )

      m.route_resources controller_file_name

      m.dependency 'hmodel', [singular_name] + @args, :collision => :skip
    end
  end

  protected
    # Override with your own usage banner.
    def banner
      "Usage: #{$0} scaffold ModelName [field:type, field:type]"
    end

    def add_options!(opt)
      opt.separator ''
      opt.separator 'Options:'
      opt.on("--skip-timestamps",
             "Don't add timestamps to the migration file for this model") { |v| options[:skip_timestamps] = v }
      opt.on("--skip-migration",
             "Don't generate a migration file for this model") { |v| options[:skip_migration] = v }
      opt.on("--force-plural",
             "Forces the generation of a plural ModelName") { |v| options[:force_plural] = v }
    end

    def scaffold_views
      %w[ index show new edit _form ]
    end

    def model_name
      class_name.demodulize
    end

    def nested_to_class
      references = @args.select{|x| x =~ /references/}
      references.empty? ? nil : references.first.split(":")[0]
    end

    def nested_object
      "[@#{nested_to_class}, @#{file_name}]" if nested_to_class
    end
    
    def index_path
      prefix_path.length > 0 ? "[#{(prefix_path + [":#{plural_name}"]).join(", ")}]" : "#{plural_name}_url"
    end

    def prefix_path
      controller_class_nesting.split("::").map(&:underscore).map{|x| ":"+x} + (nested_to_class ? ["@#{nested_to_class}"] : []) 
    end
    
    def object_path(object)
      prefix_path.length > 0 ? "[#{(prefix_path + ["#{object}"]).join(", ")}]" : "#{object}"	      
    end

    def edit_path(object)
      prefix_path.length > 0 ? "[#{([":edit"] + prefix_path + ["#{object}"]).join(", ")}]" : "edit_#{file_name}_url(#{object})"	      
    end

    def new_path
      prefix_path.length > 0 ? "[#{([":new"] + prefix_path + [":#{file_name}"]).join(", ")}]" : "new_#{file_name}_url"	      
    end

end