# -*- coding: utf-8 -*-

import datetime
import hashlib
import socket


def sha1(text: str):
    """
    十六进制数字字符串形式摘要值

    @param text: 字符串文本
    @return: 摘要值
    """
    _sha1 = hashlib.sha1()
    _sha1.update(text.encode("utf-8"))
    return _sha1.hexdigest()


def get_host_ip():
    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    try:
        s.connect(('8.8.8.8', 80))
        ip = s.getsockname()[0]
    finally:
        s.close()
    return ip


def get_today_of_day(offset, fmt='%Y-%m-%d'):
    date = datetime.datetime.now() + datetime.timedelta(days=int(offset))
    return date.strftime(fmt)