# Copyright 2024 Bytedance Ltd. and/or its affiliates
#
# 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.

import importlib
import logging
import os
from importlib.metadata import PackageNotFoundError
from importlib.metadata import version as get_version

from packaging.version import parse as parse_version

from .protocol import DataProto
from .utils.device import is_npu_available
from .utils.logging_utils import set_basic_config

version_folder = os.path.dirname(os.path.join(os.path.abspath(__file__)))

with open(os.path.join(version_folder, "version/version")) as f:
    __version__ = f.read().strip()


set_basic_config(level=logging.WARNING)


__all__ = ["DataProto", "__version__"]

if os.getenv("VERL_USE_MODELSCOPE", "False").lower() == "true":
    if importlib.util.find_spec("modelscope") is None:
        raise ImportError("You are using the modelscope hub, please install modelscope by `pip install modelscope -U`")
    # Patch hub to download models from modelscope to speed up.
    from modelscope.utils.hf_util import patch_hub

    patch_hub()

if is_npu_available:
    from .models.transformers import npu_patch as npu_patch

    package_name = "transformers"
    required_version_spec = "4.52.4"
    try:
        installed_version = get_version(package_name)
        installed = parse_version(installed_version)
        required = parse_version(required_version_spec)

        if installed < required:
            raise ValueError(
                f"{package_name} version >= {required_version_spec} is required on ASCEND NPU, current version is "
                f"{installed}."
            )
    except PackageNotFoundError as e:
        raise ImportError(
            f"package {package_name} is not installed, please run pip install {package_name}=={required_version_spec}"
        ) from e