module ActsAsLayoutable
  class Builder
    
    class << self
      def define!(*args, &block)
        new(*args, &block).collection.uniq
      end
    end
    
    attr_accessor :item, :collection
    
    def collection
      @collection ||= []
    end

    def klazz
      self.class.to_s.gsub("Builder", "").constantize
    end
    
    def initialize(*args, &block)
      args.each do |name|
        self.collection << klazz.create!(:name => name.to_s)
      end
      instance_eval(&block) if block_given?
    end
    
    def templates(*args, &block)
      TemplateBuilder.define!(*args, &block)
    end
    alias paths templates
    
    def layouts(*args, &block)
      LayoutBuilder.define!(*args, &block)
    end
    alias grids layouts
    
    def areas(*args, &block)
      AreaBuilder.define!(*args, &block)
    end
    
    def widgets(*args, &block)
      WidgetBuilder.define!(*args, &block)
    end
    alias cells widgets
    
    def method_missing(meth, *args, &block)
      if context
        result = "ActsAsLayoutable::#{context.singularize.camelize}".constantize.new
        result.instance_eval(&block) if block_given?
        return result
      else
        super(meth, *args, &block)
      end
    end
    
    private
      def context
        @context
      end
  end
end