module AbstractInterface 
  class ViewBuilder
    
    def self.generate_helper_methods methods      
      methods.each do |folder, templates|
        templates.each do |template|
          code = %{\
def #{template} *args, &block
  render_haml_builder "#{folder}", "#{template}", *args, &block
end}

          eval code, binding, __FILE__, __LINE__
        end
      end      
    end
    
    
    attr_reader :template
    def initialize template
      @template = template
    end


    # 
    # Template methods
    # 
    %w(
      capture
      concat
      content_for
      tag
      render
      themed_resource        
      themed_partial
      controller    
    ).each do |m|
      delegate m, :to => :template
    end
    
      
    # 
    # Builders
    #     
    def options *args, &block
      opt = args.extract_options!
      args.size.must_be.in 0..1
      opt[:content] = args.first if args.size == 1
      
      AbstractInterface::HamlBuilder.get_input self.template, opt, &block
    end        
    
    
    # 
    # Forms
    # 
    def form_tag *args, &block
      f = ThemedFormHelper.new(template)
      
      content = block ? capture{block.call(f)} : ""             
      html = render(
        themed_partial('forms/form'), 
        :object => {:form_attributes => options, :content => content}.to_openobject
      )
      
      if block
        template.concat html
      else
        html
      end
    end
    
    def form_for *args, &block
      model_helper, options = template.build_form_model_helper_and_form_options *args
            
      form_tag options do |themed_form_helper|
        model_helper.form_helper = themed_form_helper
        
        block.call model_helper if block
      end
    end    
  
    private
    
      def render_haml_builder folder, template, *args, &block
        opt = options *args, &block
        
        partial = "#{folder}/#{template}"

        html = render themed_partial(partial), :object => opt
        
        block ? self.concat(html) : html
      end
          
      def prepare_form! options, *args
        buff = template.form_tag *args
        options[:begin] = buff
        options[:end] = '</form>'
      end
  end
end