require 'roar-rails'

module OpenStax
  module Api
    module V1

      class ApiController < ::ApplicationController
        
        include Roar::Rails::ControllerAdditions

        fine_print_skip_signatures(:general_terms_of_use,
                                   :privacy_policy) \
          if respond_to? :fine_print_skip_signatures

        skip_protect_beta if respond_to? :skip_protect_beta

        skip_before_filter :authenticate_user!

        respond_to :json
        rescue_from Exception, :with => :rescue_from_exception

        def self.api_example(options={})
          return if Rails.env.test?
          raise IllegalArgument, "must supply a :url parameter" if !options[:url_base]

          url_base = options[:url_base].is_a?(Symbol) ?
                       UrlGenerator.new.send(options[:url_base], protocol: 'https') :
                       options[:url_base].to_s
          
          "#{url_base}/#{options[:url_end] || ''}"
        end

        def self.json_schema(representer, options={})
          RepresentableSchemaPrinter.json(representer, options)
        end
        
      protected

        def rescue_from_exception(exception)
          # See https://github.com/rack/rack/blob/master/lib/rack/utils.rb#L453 for error names/symbols
          error = :internal_server_error
          notify = true
      
          case exception
          when SecurityTransgression
            error = :forbidden
            notify = false
          when ActiveRecord::RecordNotFound, 
               ActionController::RoutingError,
               ActionController::UnknownController,
               AbstractController::ActionNotFound
            error = :not_found
            notify = false
          end

          if notify
# Not yet in OSU
=begin
            ExceptionNotifier.notify_exception(
              exception,
              env: request.env,
              data: { message: "An exception occurred" }
            )
=end
            Rails.logger.error("An exception occurred: #{exception.message}\n\n#{exception.backtrace.join("\n")}") \
          end
          
          head error
        end

      end

    end
  end
end