"""
The code is base on https://github.com/Pointcept/Pointcept
"""

import os
import random
import numpy as np
import torch
import torch.backends.cudnn as cudnn

from datetime import datetime


def get_random_seed():
    seed = (
        os.getpid()
        + int(datetime.now().strftime("%S%f"))
        + int.from_bytes(os.urandom(2), "big")
    )
    return seed


def set_seed(seed=None):
    if seed is None:
        seed = get_random_seed()
    random.seed(seed)
    np.random.seed(seed)
    torch.manual_seed(seed)
    torch.cuda.manual_seed(seed)
    torch.cuda.manual_seed_all(seed)
    cudnn.benchmark = False
    cudnn.deterministic = True
    os.environ["PYTHONHASHSEED"] = str(seed)