#
# Copyright (c) 2025 Huawei Technologies Co., Ltd. All Rights Reserved.
# Copyright 2023 The vLLM team.
#
# 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.
# This file is a part of the vllm-ascend project.
# Adapted from vllm-project/vllm/examples/offline_inference/basic.py
#
"""
 This file provides a function to obtain ips of all NPU Devices in current machine.
"""

import os
import re
import subprocess

import vllm_ascend.envs as envs

# Get all device ips using hccn_tool
HCCN_TOOL_PATH = envs.HCCN_PATH


def get_device_ips(world_size: int):
    npu_info = subprocess.run(
        ["npu-smi", "info", "-m"],
        stdout=subprocess.PIPE,
        stderr=subprocess.PIPE,
        universal_newlines=True,
    )
    if npu_info.returncode != 0 or not os.path.exists(HCCN_TOOL_PATH):
        raise RuntimeError("No npu-smi/hccn_tool tools provided for NPU.")
    npu_start_idx = int(
        re.match(r".*\n\t([0-9]+).*",
                 npu_info.stdout).group(1))  # type: ignore
    device_ip_list = []
    for ip_offset in range(world_size):
        cmd = [
            HCCN_TOOL_PATH,
            "-i",
            f"{npu_start_idx + ip_offset}",
            "-ip",
            "-g",
        ]
        device_ip_info = subprocess.run(
            cmd,
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE,
            universal_newlines=True,
        )
        device_ip = re.match(r"ipaddr:(.*)\n",
                             device_ip_info.stdout).group(1)  # type: ignore
        device_ip_list.append(device_ip)
    return device_ip_list


# Pass number of NPUs into this function.
print(get_device_ips(8))