"""
requests.compat
~~~~~~~~~~~~~~~

This module previously handled import compatibility issues
between Python 2 and Python 3. It remains for backwards
compatibility until the next major version.
"""

import sys

# -------------------
# Character Detection
# -------------------


def _resolve_char_detection():
    """Find supported character detection libraries."""
    chardet = None
    return chardet


chardet = _resolve_char_detection()

# -------
# Pythons
# -------

# Syntax sugar.
_ver = sys.version_info

#: Python 2.x?
is_py2 = _ver[0] == 2

#: Python 3.x?
is_py3 = _ver[0] == 3

# Note: We've patched out simplejson support in pip because it prevents
#       upgrading simplejson on Windows.
import json
from json import JSONDecodeError

# Keep OrderedDict for backwards compatibility.
from collections import OrderedDict
from collections.abc import Callable, Mapping, MutableMapping
from http import cookiejar as cookielib
from http.cookies import Morsel
from io import StringIO

# --------------
# Legacy Imports
# --------------
from urllib.parse import (
    quote,
    quote_plus,
    unquote,
    unquote_plus,
    urldefrag,
    urlencode,
    urljoin,
    urlparse,
    urlsplit,
    urlunparse,
)
from urllib.request import (
    getproxies,
    getproxies_environment,
    parse_http_list,
    proxy_bypass,
    proxy_bypass_environment,
)

builtin_str = str
str = str
bytes = bytes
basestring = (str, bytes)
numeric_types = (int, float)
integer_types = (int,)

"""
    pygments.formatters.pangomarkup
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    Formatter for Pango markup output.

    :copyright: Copyright 2006-2024 by the Pygments team, see AUTHORS.
    :license: BSD, see LICENSE for details.
"""

from pip._vendor.pygments.formatter import Formatter


__all__ = ['PangoMarkupFormatter']


_escape_table = {
    ord('&'): '&',
    ord('<'): '&lt;',
}


def escape_special_chars(text, table=_escape_table):
    """Escape & and < for Pango Markup."""
    return text.translate(table)


class PangoMarkupFormatter(Formatter):
    """
    Format tokens as Pango Markup code. It can then be rendered to an SVG.

    .. versionadded:: 2.9
    """

    name = 'Pango Markup'
    aliases = ['pango', 'pangomarkup']
    filenames = []

    def __init__(self, **options):
        Formatter.__init__(self, **options)

        self.styles = {}

        for token, style in self.style:
            start = ''
            end = ''
            if style['color']:
                start += '<span fgcolor="#{}">'.format(style['color'])
                end = '</span>' + end
            if style['bold']:
                start += '<b>'
                end = '</b>' + end
            if style['italic']:
                start += '<i>'
                end = '</i>' + end
            if style['underline']:
                start += '<u>'
                end = '</u>' + end
            self.styles[token] = (start, end)

    def format_unencoded(self, tokensource, outfile):
        lastval = ''
        lasttype = None

        outfile.write('<tt>')

        for ttype, value in tokensource:
            while ttype not in self.styles:
                ttype = ttype.parent
            if ttype == lasttype:
                lastval += escape_special_chars(value)
            else:
                if lastval:
                    stylebegin, styleend = self.styles[lasttype]
                    outfile.write(stylebegin + lastval + styleend)
                lastval = escape_special_chars(value)
                lasttype = ttype

        if lastval:
            stylebegin, styleend = self.styles[lasttype]
            outfile.write(stylebegin + lastval + styleend)

        outfile.write('</tt>')

# This file is dual licensed under the terms of the Apache License, Version
# 2.0, and the BSD License. See the LICENSE file in the root of this repository
# for complete details.
from __future__ import annotations

from typing import Any, Iterator

from ._parser import parse_requirement as _parse_requirement
from ._tokenizer import ParserSyntaxError
from .markers import Marker, _normalize_extra_values
from .specifiers import SpecifierSet
from .utils import canonicalize_name


class InvalidRequirement(ValueError):
    """
    An invalid requirement was found, users should refer to PEP 508.
    """


class Requirement:
    """Parse a requirement.

    Parse a given requirement string into its parts, such as name, specifier,
    URL, and extras. Raises InvalidRequirement on a badly-formed requirement
    string.
    """

    # TODO: Can we test whether something is contained within a requirement?
    #       If so how do we do that? Do we need to test against the _name_ of
    #       the thing as well as the version? What about the markers?
    # TODO: Can we normalize the name and extra name?

    def __init__(self, requirement_string: str) -> None:
        try:
            parsed = _parse_requirement(requirement_string)
        except ParserSyntaxError as e:
            raise InvalidRequirement(str(e)) from e

        self.name: str = parsed.name
        self.url: str | None = parsed.url or None
        self.extras: set[str] = set(parsed.extras or [])
        self.specifier: SpecifierSet = SpecifierSet(parsed.specifier)
        self.marker: Marker | None = None
        if parsed.marker is not None:
            self.marker = Marker.__new__(Marker)
            self.marker._markers = _normalize_extra_values(parsed.marker)

    def _iter_parts(self, name: str) -> Iterator[str]:
        yield name

        if self.extras:
            formatted_extras = ",".join(sorted(self.extras))
            yield f"[{formatted_extras}]"

        if self.specifier:
            yield str(self.specifier)

        if self.url:
            yield f"@ {self.url}"
            if self.marker:
                yield " "

        if self.marker:
            yield f"; {self.marker}"

    def __str__(self) -> str:
        return "".join(self._iter_parts(self.name))

    def __repr__(self) -> str:
        return f"<Requirement('{self}')>"

    def __hash__(self) -> int:
        return hash(
            (
                self.__class__.__name__,
                *self._iter_parts(canonicalize_name(self.name)),
            )
        )

    def __eq__(self, other: Any) -> bool:
        if not isinstance(other, Requirement):
            return NotImplemented

        return (
            canonicalize_name(self.name) == canonicalize_name(other.name)
            and self.extras == other.extras
            and self.specifier == other.specifier
            and self.url == other.url
            and self.marker == other.marker
        )