# Copyright (c) 2021 PaddlePaddle Authors. 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.

from .train_metabin import train_epoch_metabin
from .classification import ClassTrainer
from .train_fixmatch import train_epoch_fixmatch
from .train_fixmatch_ccssl import train_epoch_fixmatch_ccssl
from .train_progressive import train_epoch_progressive


def build_train_func(config, mode, model, eval_func):
    if mode != "train":
        return None
    train_mode = config["Global"].get("task", None)
    if train_mode is None:
        config["Global"]["task"] = "classification"
        return ClassTrainer(config, mode, model, eval_func)
    else:
        return getattr(sys.modules[__name__], "train_epoch_" + train_mode)(
            config, mode, model, eval_func)