text: import json
  
  from moto.core.responses import BaseResponse
  from .models import greengrass_backends
  
  
  class GreengrassResponse(BaseResponse):
      SERVICE_NAME = "greengrass"
  
      @property
      def greengrass_backend(self):
          return greengrass_backends[self.region]
  
      def core_definitions(self, request, full_url, headers):
          self.setup_class(request, full_url, headers)
  
          if self.method == "GET":
              return self.list_core_definitions()
  
          if self.method == "POST":
              return self.create_core_definition()
  
      def list_core_definitions(self):
          res = self.greengrass_backend.list_core_definitions()
          return (
              200,
              {"status": 200},
              json.dumps(
                  {"Definitions": [core_definition.to_dict() for core_definition in res]}
              ),
          )
  
      def create_core_definition(self):
          name = self._get_param("Name")
          initial_version = self._get_param("InitialVersion")
          res = self.greengrass_backend.create_core_definition(
              name=name, initial_version=initial_version
          )
          return 201, {"status": 201}, json.dumps(res.to_dict())
  
      def core_definition(self, request, full_url, headers):
          self.setup_class(request, full_url, headers)
  
          if self.method == "GET":
              return self.get_core_definition()
  
          if self.method == "DELETE":
              return self.delete_core_definition()
  
          if self.method == "PUT":
              return self.update_core_definition()
  
      def get_core_definition(self):
          core_definition_id = self.path.split("/")[-1]
          res = self.greengrass_backend.get_core_definition(
              core_definition_id=core_definition_id
          )
          return 200, {"status": 200}, json.dumps(res.to_dict())
  
      def delete_core_definition(self):
          core_definition_id = self.path.split("/")[-1]
          self.greengrass_backend.delete_core_definition(
              core_definition_id=core_definition_id
          )
          return 200, {"status": 200}, json.dumps({})
  
      def update_core_definition(self):
          core_definition_id = self.path.split("/")[-1]
          name = self._get_param("Name")
          self.greengrass_backend.update_core_definition(
              core_definition_id=core_definition_id, name=name
          )
          return 200, {"status": 200}, json.dumps({})
  
      def core_definition_versions(self, request, full_url, headers):
          self.setup_class(request, full_url, headers)
  
          if self.method == "GET":
              return self.list_core_definition_versions()
  
          if self.method == "POST":
              return self.create_core_definition_version()
  
      def create_core_definition_version(self):
          core_definition_id = self.path.split("/")[-2]
          cores = self._get_param("Cores")
  
          res = self.greengrass_backend.create_core_definition_version(
              core_definition_id=core_definition_id, cores=cores
          )
          return 201, {"status": 201}, json.dumps(res.to_dict())
  
      def list_core_definition_versions(self):
          core_definition_id = self.path.split("/")[-2]
          res = self.greengrass_backend.list_core_definition_versions(core_definition_id)
          return (
              200,
              {"status": 200},
              json.dumps({"Versions": [core_def_ver.to_dict() for core_def_ver in res]}),
          )
  
      def core_definition_version(self, request, full_url, headers):
          self.setup_class(request, full_url, headers)
  
          if self.method == "GET":
              return self.get_core_definition_version()
  
      def get_core_definition_version(self):
          core_definition_id = self.path.split("/")[-3]
          core_definition_version_id = self.path.split("/")[-1]
          res = self.greengrass_backend.get_core_definition_version(
              core_definition_id=core_definition_id,
              core_definition_version_id=core_definition_version_id,
          )
          return 200, {"status": 200}, json.dumps(res.to_dict(include_detail=True))
  
      def device_definitions(self, request, full_url, headers):
          self.setup_class(request, full_url, headers)
  
          if self.method == "POST":
              return self.create_device_definition()
  
          if self.method == "GET":
              return self.list_device_definition()
  
      def create_device_definition(self):
  
          name = self._get_param("Name")
          initial_version = self._get_param("InitialVersion")
          res = self.greengrass_backend.create_device_definition(
              name=name, initial_version=initial_version
          )
          return 201, {"status": 201}, json.dumps(res.to_dict())
  
      def list_device_definition(self):
          res = self.greengrass_backend.list_device_definitions()
          return (
              200,
              {"status": 200},
              json.dumps(
                  {
                      "Definitions": [
                          device_definition.to_dict() for device_definition in res
                      ]
                  }
              ),
          )
  
      def device_definition_versions(self, request, full_url, headers):
          self.setup_class(request, full_url, headers)
  
          if self.method == "POST":
              return self.create_device_definition_version()
  
      def create_device_definition_version(self):
  
          device_definition_id = self.path.split("/")[-2]
          devices = self._get_param("Devices")
  
          res = self.greengrass_backend.create_device_definition_version(
              device_definition_id=device_definition_id, devices=devices
          )
          return 201, {"status": 201}, json.dumps(res.to_dict())
  
      def device_definition(self, request, full_url, headers):
          self.setup_class(request, full_url, headers)
  
          if self.method == "GET":
              return self.get_device_definition()
  
          if self.method == "DELETE":
              return self.delete_device_definition()
  
          if self.method == "PUT":
              return self.update_device_definition()
  
      def get_device_definition(self):
          device_definition_id = self.path.split("/")[-1]
          res = self.greengrass_backend.get_device_definition(
              device_definition_id=device_definition_id
          )
          return 200, {"status": 200}, json.dumps(res.to_dict())
  
      def delete_device_definition(self):
  
          device_definition_id = self.path.split("/")[-1]
          self.greengrass_backend.delete_device_definition(
              device_definition_id=device_definition_id
          )
          return 200, {"status": 200}, json.dumps({})
  
      def update_device_definition(self):
  
          device_definition_id = self.path.split("/")[-1]
          name = self._get_param("Name")
          self.greengrass_backend.update_device_definition(
              device_definition_id=device_definition_id, name=name
          )
          return 200, {"status": 200}, json.dumps({})
  