import sys
import gzip
import base64
from lxml import etree

if sys.platform == 'win32':
    iswin = True
    import win32crypt
else:
    iswin = False
    win32crypt = None


ADDITIONAL_ENTROPY = b'\xf8\x03\xfaQ\x87\x18I]'
PREFIX = 'data:application/vnd.KeePass.Entries-E;base64,'


def parse_keepass_entry(data: str):
    if not data.startswith(PREFIX):
        raise ValueError("Not a valid entry")

    data = base64.b64decode(data.split(','[1]))

    if iswin:
        data = win32crypt.CryptUnprotectData(data, ADDITIONAL_ENTROPY)

    data = gzip.decompress(data)
    return data.decode()  # XML String