# Copyright (c) 2024, EleutherAI
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from dataclasses import dataclass
import logging


@dataclass
class NeoXArgsTemplate:
    def defaults(self):
        """
        generator for getting default values.
        """
        for key, field_def in self.__dataclass_fields__.items():
            yield key, field_def.default

    def update_value(self, key: str, value):
        """
        updates a property value if the key already exists

        Problem: a previously non-existing property can be added to the class instance without error.
        """
        if hasattr(self, key):
            setattr(self, key, value)
        else:
            error_message = (
                self.__class__.__name__
                + ".update_value() to be updated property "
                + str(key)
                + " does not exist"
            )
            logging.error(error_message)
            raise ValueError(error_message)

    def update_values(self, d):
        """
        Updates multiple values in self if the keys already exists
        """
        for k, v in d.items():
            self.update_value(k, v)