from __future__ import unicode_literals

import base64
import calendar
import datetime
import re
import sys
import unicodedata
from binascii import Error as BinasciiError
from email.utils import formatdate

from django.utils import six
from django.utils.datastructures import MultiValueDict
from django.utils.encoding import force_bytes, force_str, force_text
from django.utils.functional import keep_lazy_text
from django.utils.six.moves.urllib.parse import (
    quote, quote_plus, unquote, unquote_plus, urlencode as original_urlencode,
    urlparse,
)

ETAG_MATCH = re.compile(r'(?:W/)?"((?:\\.|[^"])*)"')

MONTHS = 'jan feb mar apr may jun jul aug sep oct nov dec'.split()
__D = r'(?P<day>\d{2})'
__D2 = r'(?P<day>[ \d]\d)'
__M = r'(?P<mon>\w{3})'
__Y = r'(?P<year>\d{4})'
__Y2 = r'(?P<year>\d{2})'
__T = r'(?P<hour>\d{2}):(?P<min>\d{2}):(?P<sec>\d{2})'
RFC1123_DATE = re.compile(r'^\w{3}, %s %s %s %s GMT$' % (__D, __M, __Y, __T))
RFC850_DATE = re.compile(r'^\w{6,9}, %s-%s-%s %s GMT$' % (__D, __M, __Y2, __T))
ASCTIME_DATE = re.compile(r'^\w{3} %s %s %s %s$' % (__M, __D2, __T, __Y))

RFC3986_GENDELIMS = str(":/?#[]@")
RFC3986_SUBDELIMS = str("!$&'()*+,;=")


@keep_lazy_text
def urlquote(url, safe='/'):
    """
    A version of Python's urllib.quote() function that can operate on unicode
    strings. The url is first UTF-8 encoded before quoting. The returned string
    can safely be used as part of an argument to a subsequent iri_to_uri() call
    without double-quoting occurring.
    """
    return force_text(quote(force_str(url), force_str(safe)))


@keep_lazy_text
def urlquote_plus(url, safe=''):
    """
    A version of Python's urllib.quote_plus() function that can operate on
    unicode strings. The url is first UTF-8 encoded before quoting. The
    returned string can safely be used as part of an argument to a subsequent
    iri_to_uri() call without double-quoting occurring.
    """
    return force_text(quote_plus(force_str(url), force_str(safe)))


@keep_lazy_text
def urlunquote(quoted_url):
    """
    A wrapper for Python's urllib.unquote() function that can operate on
    the result of django.utils.http.urlquote().
    """
    return force_text(unquote(force_str(quoted_url)))


@keep_lazy_text
def urlunquote_plus(quoted_url):
    """
    A wrapper for Python's urllib.unquote_plus() function that can operate on
    the result of django.utils.http.urlquote_plus().
    """
    return force_text(unquote_plus(force_str(quoted_url)))


def urlencode(query, doseq=0):
    """
    A version of Python's urllib.urlencode() function that can operate on
    unicode strings. The parameters are first cast to UTF-8 encoded strings and
    then encoded as per normal.
    """
    if isinstance(query, MultiValueDict):
        query = query.lists()
    elif hasattr(query, 'items'):
        query = query.items()
    return original_urlencode(
        [(force_str(k),
         [force_str(i) for i in v] if isinstance(v, (list, tuple)) else force_str(v))
            for k, v in query],
        doseq)


def cookie_date(epoch_seconds=None):
    """
    Formats the time to ensure compatibility with Netscape's cookie standard.

    Accepts a floating point number expressed in seconds since the epoch, in
    UTC - such as that outputted by time.time(). If set to None, defaults to
    the current time.

    Outputs a string in the format 'Wdy, DD-Mon-YYYY HH:MM:SS GMT'.