require ::File.expand_path('../../../pacemaker/cib_object',
                           File.dirname(__FILE__))

# Common code used by Pacemaker LWRP providers

class Chef
  module Mixin::Pacemaker
    module StandardCIBObject
      def standard_create_action
        name = new_resource.name

        if @current_resource_definition.nil?
          create_resource(name)
        else
          maybe_modify_resource(name)
        end
      end

      # Instantiate @current_resource and read details about the existing
      # primitive (if any) via "crm configure show" into it, so that we
      # can compare it against the resource requested by the recipe, and
      # create / delete / modify as necessary.
      #
      # http://docs.opscode.com/lwrp_custom_provider_ruby.html#load-current-resource
      def standard_load_current_resource
        name = @new_resource.name

        cib_object = Pacemaker::CIBObject.from_name(name)
        unless cib_object
          ::Chef::Log.debug "CIB object definition nil or empty"
          return
        end

        unless cib_object.is_a? cib_object_class
          expected_type = cib_object_class.description
          ::Chef::Log.warn "CIB object '#{name}' was a #{cib_object.type} not a #{expected_type}"
          return
        end

        ::Chef::Log.debug "CIB object definition #{cib_object.definition}"
        @current_resource_definition = cib_object.definition
        cib_object.parse_definition

        @current_cib_object = cib_object
        init_current_resource
      end

      def standard_create_resource
        cib_object = cib_object_class.from_chef_resource(new_resource)
        cmd = cib_object.configure_command

        ::Chef::Log.info "Creating new #{cib_object}"

        execute cmd do
          action :nothing
        end.run_action(:run)

        created_cib_object = Pacemaker::CIBObject.from_name(new_resource.name)

        raise "Failed to create #{cib_object}" if created_cib_object.nil?
        unless created_cib_object.exists?
          # This case seems pretty unlikely
          raise "Definition missing for #{created_cib_object} after creation"
        end

        new_resource.updated_by_last_action(true)
        ::Chef::Log.info "Successfully configured #{created_cib_object}"
      end

      def standard_delete_resource
        execute @current_cib_object.delete_command do
          action :nothing
        end.run_action(:run)
        new_resource.updated_by_last_action(true)
        Chef::Log.info "Deleted #{@current_cib_object}'."
      end
    end
  end
end