require 'chef/chef_fs/file_system/chef_server/rest_list_entry'
require 'chef/chef_fs/data_handler/policy_data_handler'

class Chef
  module ChefFS
    module FileSystem
      module ChefServer
        # /policies/NAME-REVISION.json
        # Represents the actual data at /organizations/ORG/policies/NAME/revisions/REVISION
        class PolicyRevisionEntry < RestListEntry

          # /policies/foo-1.0.0.json -> /policies/foo/revisions/1.0.0
          def api_path(options={})
            policy_name, revision_id = data_handler.name_and_revision(name)
            "#{parent.api_path}/#{policy_name}/revisions/#{revision_id}"
          end

          def write(file_contents)
            raise OperationNotAllowedError.new(:write, self, nil, "cannot be updated: policy revisions are immutable once uploaded. If you want to change the policy, create a new revision with your changes")
          end
        end
      end
    end
  end
end