import os
import sys
import xml.etree.ElementTree as etree

from .compat_utils import passthrough_module

passthrough_module(__name__, '._deprecated')
del passthrough_module


# HTMLParseError has been deprecated in Python 3.3 and removed in
# Python 3.5. Introducing dummy exception for Python >3.5 for compatible
# and uniform cross-version exception handling
class compat_HTMLParseError(ValueError):
    pass


class _TreeBuilder(etree.TreeBuilder):
    def doctype(self, name, pubid, system):
        pass


def compat_etree_fromstring(text):
    return etree.XML(text, parser=etree.XMLParser(target=_TreeBuilder()))


compat_os_name = os._name if os.name == 'java' else os.name


def compat_shlex_quote(s):
    from ..utils import shell_quote
    return shell_quote(s)


def compat_ord(c):
    return c if isinstance(c, int) else ord(c)


if compat_os_name == 'nt' and sys.version_info < (3, 8):
    # os.path.realpath on Windows does not follow symbolic links
    # prior to Python 3.8 (see https://bugs.python.org/issue9949)
    def compat_realpath(path):
        while os.path.islink(path):
            path = os.path.abspath(os.readlink(path))
        return os.path.realpath(path)
else:
    compat_realpath = os.path.realpath


# Python 3.8+ does not honor %HOME% on windows, but this breaks compatibility with youtube-dl
# See https://github.com/yt-dlp/yt-dlp/issues/792
# https://docs.python.org/3/library/os.path.html#os.path.expanduser
if compat_os_name in ('nt', 'ce'):
    def compat_expanduser(path):
        HOME = os.environ.get('HOME')
        if not HOME:
            return os.path.expanduser(path)
        elif not path.startswith('~'):
            return path
        i = path.replace('\\', '/', 1).find('/')  # ~user
        if i < 0:
            i = len(path)
        userhome = os.path.join(os.path.dirname(HOME), path[1:i]) if i > 1 else HOME
        return userhome + path[i:]
else:
    compat_expanduser = os.path.expanduser


def urllib_req_to_req(urllib_request):
    """Convert urllib Request to a networking Request"""
    from ..networking import Request
    from ..utils.networking import HTTPHeaderDict
    return Request(
        urllib_request.get_full_url(), data=urllib_request.data, method=urllib_request.get_method(),
        headers=HTTPHeaderDict(urllib_request.headers, urllib_request.unredirected_hdrs),
        extensions={'timeout': urllib_request.timeout} if hasattr(urllib_request, 'timeout') else None)
