# Copyright (C) 2024 Nota Inc. All Rights Reserved.
#
# 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.
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# ----------------------------------------------------------------------------

from typing import Literal

import torch.nn as nn
from omegaconf import DictConfig

from .registry import OPTIMIZER_DICT


def build_optimizer(
    model_or_params,
    optimizer_conf: DictConfig,
):
    parameters = model_or_params.parameters() if isinstance(model_or_params, nn.Module) else model_or_params

    opt_name: Literal['sgd', 'adam', 'adamw', 'adamax', 'adadelta', 'adagrad', 'rmsprop'] = optimizer_conf.name.lower()
    assert opt_name in OPTIMIZER_DICT

    optimizer = OPTIMIZER_DICT[opt_name](parameters, optimizer_conf)
    return optimizer
