# 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.
"""
A unified tracking interface that supports logging data to different backend
"""

from typing import List, Union


class Tracking(object):
    supported_backend = ['wandb', 'console']

    def __init__(self, project_name, experiment_name, default_backend: Union[str, List[str]] = 'console', config=None, local_dir=None, wandb_mode='online'):
        if isinstance(default_backend, str):
            default_backend = [default_backend]
        for backend in default_backend:
            if backend == 'tracking':
                import warnings
                warnings.warn("`tracking` logger is deprecated. use `wandb` instead.", DeprecationWarning)
            else:
                assert backend in self.supported_backend, f'{backend} is not supported'

        self.logger = {}

        if 'tracking' in default_backend or 'wandb' in default_backend:
            import wandb
            # wandb.mode = 'offline'
            wandb.init(project=project_name, name=experiment_name, mode=wandb_mode, config=config)
            self.logger['wandb'] = wandb

        if 'console' in default_backend:
            from verl.utils.logger.aggregate_logger import LocalLogger
            self.console_logger = LocalLogger(print_to_console=True, log_dir=local_dir)
            self.logger['console'] = self.console_logger

    def log(self, data, step, backend=None):
        for default_backend, logger_instance in self.logger.items():
            if backend is None or default_backend in backend:
                logger_instance.log(data=data, step=step)