require File.dirname(__FILE__)+'/mixins/erubis_capture_mixin'
require File.dirname(__FILE__)+'/mixins/view_context_mixin'
require File.dirname(__FILE__)+'/mixins/form_control_mixin'

module Merb
  PROTECTED_IVARS = %w[@_new_cookie
                       @method
                       @env
                       @body
                       @_fingerprint_before
                       @pager
                       @session
                       @headers
                       @page
                       @cookies
                       @request
                       @status
                       @_view_context_cache
                       @response
                       @params]
                       
  module GlobalHelper
  end    
  # the ViewContext is really
  # just an empty container for us to fill with instance 
  # variables from the controller, include helpers into
  # and then use as the context object passed to Erubis
  # when evaluating the templates.
  class ViewContext
    include Merb::ViewContextMixin
    include Merb::FormControls
    include Merb::GlobalHelper
    
    def initialize(controller)
      @_merb_partial_locals = {}
      @controller = controller
      (@controller.instance_variables - PROTECTED_IVARS).each do |ivar|
        self.instance_variable_set(ivar, @controller.instance_variable_get(ivar))
      end
      begin
        self.class.class_eval("include Merb::#{@controller.class.name}Helper")
      rescue NameError
        MERB_LOGGER.info("Missing Helper: Merb::#{@controller.class.name}Helper")
      end  
    end
    
    # hack so markaby doesn't dup us and lose ivars.
    def dup
      self
    end
      
    # accessor for the view. refers to the current @controller object
    def controller
      @controller
    end
      
    alias_method :old_respond_to?, :respond_to?
    
    def respond_to?(sym, include_private=false)
      old_respond_to?(sym, include_private) || @controller.respond_to?(sym, include_private) || @_merb_partial_locals.key?(sym)
    end
    
    # catch any method calls that the controller responds to
    # and delegate them back to the controller.
    def method_missing(sym, *args, &blk)
      if @controller.respond_to? sym
        @controller.send(sym, *args, &blk)
      elsif @_merb_partial_locals.key? sym
        @_merb_partial_locals[sym]
      else
        super
      end    
    end
    
  end
  
end