# Last modified: 2025-01-14
#
# Copyright 2025 Ziyang Song, USTC. All rights reserved.
#
# This file has been modified from the original version.
# Original copyright (c) 2023 Bingxin Ke, ETH Zurich. 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.
# --------------------------------------------------------------------------
# If you find this code useful, we kindly ask you to cite our paper in your work.
# Please find bibtex at: https://github.com/indu1ge/DepthMaster#-citation
# More information about the method can be found at https://indu1ge.github.io/DepthMaster_page
# --------------------------------------------------------------------------

import omegaconf
from omegaconf import OmegaConf


def recursive_load_config(config_path: str) -> OmegaConf:
    conf = OmegaConf.load(config_path)

    output_conf = OmegaConf.create({})

    # Load base config. Later configs on the list will overwrite previous
    base_configs = conf.get("base_config", default_value=None)
    if base_configs is not None:
        assert isinstance(base_configs, omegaconf.listconfig.ListConfig)
        for _path in base_configs:
            assert (
                _path != config_path
            ), "Circulate merging, base_config should not include itself."
            _base_conf = recursive_load_config(_path)
            output_conf = OmegaConf.merge(output_conf, _base_conf)

    # Merge configs and overwrite values
    output_conf = OmegaConf.merge(output_conf, conf)

    return output_conf


def find_value_in_omegaconf(search_key, config):
    result_list = []

    if isinstance(config, omegaconf.DictConfig):
        for key, value in config.items():
            if key == search_key:
                result_list.append(value)
            elif isinstance(value, (omegaconf.DictConfig, omegaconf.ListConfig)):
                result_list.extend(find_value_in_omegaconf(search_key, value))
    elif isinstance(config, omegaconf.ListConfig):
        for item in config:
            if isinstance(item, (omegaconf.DictConfig, omegaconf.ListConfig)):
                result_list.extend(find_value_in_omegaconf(search_key, item))

    return result_list


if "__main__" == __name__:
    conf = recursive_load_config("config/train_base.yaml")
    print(OmegaConf.to_yaml(conf))