# 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.
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import os

PPO_RAY_RUNTIME_ENV = {
    "env_vars": {
        "TOKENIZERS_PARALLELISM": "true",
        "NCCL_DEBUG": "WARN",
        "VLLM_LOGGING_LEVEL": "WARN",
        "VLLM_ALLOW_RUNTIME_LORA_UPDATING": "true",
        "CUDA_DEVICE_MAX_CONNECTIONS": "1",
    },
}


def get_ppo_ray_runtime_env():
    """
    A filter function to return the PPO Ray runtime environment.
    To avoid repeat of some environment variables that are already set.
    """
    runtime_env = {"env_vars": PPO_RAY_RUNTIME_ENV["env_vars"].copy()}
    for key in list(runtime_env["env_vars"].keys()):
        if os.environ.get(key) is not None:
            runtime_env["env_vars"].pop(key, None)
    return runtime_env
