module RailsConnector

  class CmsDispatchController < ActionController::Metal
    def process(action)
      CmsEnv.new(request.env).load
      controller = target_controller(request.env)
      request.env["action_dispatch.request.path_parameters"][:controller] = controller.controller_path

      if !obj_not_found? && action == 'index'
        action = loaded_obj.controller_action_name
      end

      request.env["action_dispatch.request.path_parameters"][:action] = action

      self.response = controller.action(action).call(request.env)
    end

    private

    def target_controller(env)
      return default_controller if obj_not_found?
      controller = "#{loaded_obj.controller_name}Controller".constantize

      if controller.respond_to?(:use_for_obj_dispatch?) && controller.use_for_obj_dispatch?
        controller
      else
        default_controller
      end
    rescue NameError
      default_controller
    end

    def loaded_obj
      request.env[CmsEnv::OBJ_ENV_KEY]
    end

    def obj_not_found?
      loaded_obj.is_a?(StandardError)
    end

    def default_controller
      CmsController
    end
  end

end