from datetime import datetime
import secrets
import string
import passlib.hash

VALID_TOKEN_CHARS = string.digits + string.ascii_letters


def random_token():
    return "".join(secrets.choice(VALID_TOKEN_CHARS) for i in range(8))


def file_date_human(num):
    return datetime.fromtimestamp(num).strftime("%y-%m-%d")


def file_time_human(num):
    return datetime.fromtimestamp(num).strftime("%y-%m-%d %H:%M")


def file_size_human(num, HTML=True):
    space = " " if HTML else " "
    for x in [space + "B", "KB", "MB", "GB", "TB"]:
        if num < 1024.0:
            if x == space + "B":
                return "%d%s%s" % (num, space, x)
            return "%3.1f%s%s" % (num, space, x)
        num /= 1024.0


def file_size_MB(num):
    return "{:,.2f}".format(num / (1024 * 1024))


def hash_password(password):
    return passlib.hash.argon2.hash(password)


def verify_password(password, hash):
    return passlib.hash.argon2.verify(password, hash)