from typing import Iterable, Tuple, TypeVar

T = TypeVar("T")


def loop_first(values: Iterable[T]) -> Iterable[Tuple[bool, T]]:
    """Iterate and generate a tuple with a flag for first value."""
    iter_values = iter(values)
    try:
        value = next(iter_values)
    except StopIteration:
        return
    yield True, value
    for value in iter_values:
        yield False, value


def loop_last(values: Iterable[T]) -> Iterable[Tuple[bool, T]]:
    """Iterate and generate a tuple with a flag for last value."""
    iter_values = iter(values)
    try:
        previous_value = next(iter_values)
    except StopIteration:
        return
    for value in iter_values:
        yield False, previous_value
        previous_value = value
    yield True, previous_value


def loop_first_last(values: Iterable[T]) -> Iterable[Tuple[bool, bool, T]]:
    """Iterate and generate a tuple with a flag for first and last value."""
    iter_values = iter(values)
    try:
        previous_value = next(iter_values)
    except StopIteration:
        return
    first = True
    for value in iter_values:
        yield first, False, previous_value
        first = False
        previous_value = value
    yield first, True, previous_value

r"""
The ``codes`` object defines a mapping from common names for HTTP statuses
to their numerical codes, accessible either as attributes or as dictionary
items.

Example::

    >>> import requests
    >>> requests.codes['temporary_redirect']
    307
    >>> requests.codes.teapot
    418
    >>> requests.codes['\o/']
    200

Some codes have multiple names, and both upper- and lower-case versions of
the names are allowed. For example, ``codes.ok``, ``codes.OK``, and
``codes.okay`` all correspond to the HTTP status code 200.
"""

from .structures import LookupDict

_codes = {
    # Informational.
    100: ("continue",),
    101: ("switching_protocols",),
    102: ("processing", "early-hints"),
    103: ("checkpoint",),
    122: ("uri_too_long", "request_uri_too_long"),
    200: ("ok", "okay", "all_ok", "all_okay", "all_good", "\\o/", "✓"),
    201: ("created",),
    202: ("accepted",),
    203: ("non_authoritative_info", "non_authoritative_information"),
    204: ("no_content",),
    205: ("reset_content", "reset"),
    206: ("partial_content", "partial"),
    207: ("multi_status", "multiple_status", "multi_stati", "multiple_stati"),
    208: ("already_reported",),
    226: ("im_used",),
    # Redirection.
    300: ("multiple_choices",),
    301: ("moved_permanently", "moved", "\\o-"),
    302: ("found",),
    303: ("see_other", "other"),
    304: ("not_modified",),
    305: ("use_proxy",),
    306: ("switch_proxy",),
    307: ("temporary_redirect", "temporary_moved", "temporary"),
    308: (
        "permanent_redirect",
        "resume_incomplete",
        "resume",
    ),  # "resume" and "resume_incomplete" to be removed in 3.0
    # Client Error.
    400: ("bad_request", "bad"),
    401: ("unauthorized",),
    402: ("payment_required", "payment"),
    403: ("forbidden",),
    404: ("not_found", "-o-"),
    405: ("method_not_allowed", "not_allowed"),
    406: ("not_acceptable",),
    407: ("proxy_authentication_required", "proxy_auth", "proxy_authentication"),
    408: ("request_timeout", "timeout"),
    409: ("conflict",),
    410: ("gone",),
    411: ("length_required",),
    412: ("precondition_failed", "precondition"),
    413: ("request_entity_too_large", "content_too_large"),
    414: ("request_uri_too_large", "uri_too_long"),
    415: ("unsupported_media_type", "unsupported_media", "media_type"),
    416: (
        "requested_range_not_satisfiable",
        "requested_range",
        "range_not_satisfiable",
    ),
    417: ("expectation_failed",),
    418: ("im_a_teapot", "teapot", "i_am_a_teapot"),
    421: ("misdirected_request",),
    422: ("unprocessable_entity", "unprocessable", "unprocessable_content"),
    423: ("locked",),
    424: ("failed_dependency", "dependency"),
    425: ("unordered_collection", "unordered", "too_early"),
    426: ("upgrade_required", "upgrade"),
    428: ("precondition_required", "precondition"),
    429: ("too_many_requests", "too_many"),
    431: ("header_fields_too_large", "fields_too_large"),
    444: ("no_response", "none"),
    449: ("retry_with", "retry"),
    450: ("blocked_by_windows_parental_controls", "parental_controls"),
    451: ("unavailable_for_legal_reasons", "legal_reasons"),
    499: ("client_closed_request",),
    # Server Error.
    500: ("internal_server_error", "server_error", "/o\\", "✗"),
    501: ("not_implemented",),
    502: ("bad_gateway",),
    503: ("service_unavailable", "unavailable"),
    504: ("gateway_timeout",),
    505: ("http_version_not_supported", "http_version"),
    506: ("variant_also_negotiates",),
    507: ("insufficient_storage",),
    509: ("bandwidth_limit_exceeded", "bandwidth"),
    510: ("not_extended",),
    511: ("network_authentication_required", "network_auth", "network_authentication"),
}

codes = LookupDict(name="status_codes")


def _init():
    for code, titles in _codes.items():
        for title in titles:
            setattr(codes, title, code)
            if not title.startswith(("\\", "/")):
                setattr(codes, title.upper(), code)

    def doc(code):
        names = ", ".join(f"``{n}``" for n in _codes[code])
        return "* %d: %s" % (code, names)

    global __doc__
    __doc__ = (
        __doc__ + "\n" + "\n".join(doc(code) for code in sorted(_codes))
        if __doc__ is not None
        else None
    )


_init()

import locale
import logging
import os
import sys
from optparse import Values
from types import ModuleType
from typing import Any, Dict, List, Optional

import pip._vendor
from pip._vendor.certifi import where
from pip._vendor.packaging.version import parse as parse_version

from pip._internal.cli import cmdoptions
from pip._internal.cli.base_command import Command
from pip._internal.cli.cmdoptions import make_target_python
from pip._internal.cli.status_codes import SUCCESS
from pip._internal.configuration import Configuration
from pip._internal.metadata import get_environment
from pip._internal.utils.compat import open_text_resource
from pip._internal.utils.logging import indent_log
from pip._internal.utils.misc import get_pip_version

logger = logging.getLogger(__name__)


def show_value(name: str, value: Any) -> None:
    logger.info("%s: %s", name, value)


def show_sys_implementation() -> None:
    logger.info("sys.implementation:")
    implementation_name = sys.implementation.name
    with indent_log():
        show_value("name", implementation_name)


def create_vendor_txt_map() -> Dict[str, str]:
    with open_text_resource("pip._vendor", "vendor.txt") as f:
        # Purge non version specifying lines.
        # Also, remove any space prefix or suffixes (including comments).
        lines = [
            line.strip().split(" ", 1)[0] for line in f.readlines() if "==" in line
        ]

    # Transform into "module" -> version dict.
    return dict(line.split("==", 1) for line in lines)


def get_module_from_module_name(module_name: str) -> Optional[ModuleType]:
    # Module name can be uppercase in vendor.txt for some reason...
    module_name = module_name.lower().replace("-", "_")
    # PATCH: setuptools is actually only pkg_resources.
    if module_name == "setuptools":
        module_name = "pkg_resources"

    try:
        __import__(f"pip._vendor.{module_name}", globals(), locals(), level=0)
        return getattr(pip._vendor, module_name)
    except ImportError:
        # We allow 'truststore' to fail to import due
        # to being unavailable on Python 3.9 and earlier.
        if module_name == "truststore" and sys.version_info < (3, 10):
            return None
        raise


def get_vendor_version_from_module(module_name: str) -> Optional[str]:
    module = get_module_from_module_name(module_name)
    version = getattr(module, "__version__", None)

    if module and not version:
        # Try to find version in debundled module info.
        assert module.__file__ is not None
        env = get_environment([os.path.dirname(module.__file__)])
        dist = env.get_distribution(module_name)
        if dist:
            version = str(dist.version)

    return version


def show_actual_vendor_versions(vendor_txt_versions: Dict[str, str]) -> None:
    """Log the actual version and print extra info if there is
    a conflict or if the actual version could not be imported.
    """
    for module_name, expected_version in vendor_txt_versions.items():
        extra_message = ""
        actual_version = get_vendor_version_from_module(module_name)
        if not actual_version:
            extra_message = (
                " (Unable to locate actual module version, using"
                " vendor.txt specified version)"
            )
            actual_version = expected_version
        elif parse_version(actual_version) != parse_version(expected_version):
            extra_message = (
                " (CONFLICT: vendor.txt suggests version should"
                f" be {expected_version})"
            )
        logger.info("%s==%s%s", module_name, actual_version, extra_message)


def show_vendor_versions() -> None:
    logger.info("vendored library versions:")

    vendor_txt_versions = create_vendor_txt_map()
    with indent_log():
        show_actual_vendor_versions(vendor_txt_versions)


def show_tags(options: Values) -> None:
    tag_limit = 10

    target_python = make_target_python(options)
    tags = target_python.get_sorted_tags()

    # Display the target options that were explicitly provided.
    formatted_target = target_python.format_given()
    suffix = ""
    if formatted_target:
        suffix = f" (target: {formatted_target})"

    msg = f"Compatible tags: {len(tags)}{suffix}"
    logger.info(msg)

    if options.verbose < 1 and len(tags) > tag_limit:
        tags_limited = True
        tags = tags[:tag_limit]
    else:
        tags_limited = False

    with indent_log():
        for tag in tags:
            logger.info(str(tag))

        if tags_limited:
            msg = f"...\n[First {tag_limit} tags shown. Pass --verbose to show all.]"
            logger.info(msg)


def ca_bundle_info(config: Configuration) -> str:
    levels = {key.split(".", 1)[0] for key, _ in config.items()}
    if not levels:
        return "Not specified"

    levels_that_override_global = ["install", "wheel", "download"]
    global_overriding_level = [
        level for level in levels if level in levels_that_override_global
    ]
    if not global_overriding_level:
        return "global"

    if "global" in levels:
        levels.remove("global")
    return ", ".join(levels)


class DebugCommand(Command):
    """
    Display debug information.
    """

    usage = """
      %prog <options>"""
    ignore_require_venv = True

    def add_options(self) -> None:
        cmdoptions.add_target_python_options(self.cmd_opts)
        self.parser.insert_option_group(0, self.cmd_opts)
        self.parser.config.load()

    def run(self, options: Values, args: List[str]) -> int:
        logger.warning(
            "This command is only meant for debugging. "
            "Do not use this with automation for parsing and getting these "
            "details, since the output and options of this command may "
            "change without notice."
        )
        show_value("pip version", get_pip_version())
        show_value("sys.version", sys.version)
        show_value("sys.executable", sys.executable)
        show_value("sys.getdefaultencoding", sys.getdefaultencoding())
        show_value("sys.getfilesystemencoding", sys.getfilesystemencoding())
        show_value(
            "locale.getpreferredencoding",
            locale.getpreferredencoding(),
        )
        show_value("sys.platform", sys.platform)
        show_sys_implementation()

        show_value("'cert' config value", ca_bundle_info(self.parser.config))
        show_value("REQUESTS_CA_BUNDLE", os.environ.get("REQUESTS_CA_BUNDLE"))
        show_value("CURL_CA_BUNDLE", os.environ.get("CURL_CA_BUNDLE"))
        show_value("pip._vendor.certifi.where()", where())
        show_value("pip._vendor.DEBUNDLED", pip._vendor.DEBUNDLED)

        show_vendor_versions()

        show_tags(options)

        return SUCCESS

CONSOLE_HTML_FORMAT = """\
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<style>
{stylesheet}
body {{
    color: {foreground};
    background-color: {background};
}}
</style>
</head>
<body>
    <pre style="font-family:Menlo,'DejaVu Sans Mono',consolas,'Courier New',monospace"><code style="font-family:inherit">{code}</code></pre>
</body>
</html>
"""

CONSOLE_SVG_FORMAT = """\
<svg class="rich-terminal" viewBox="0 0 {width} {height}" xmlns="http://www.w3.org/2000/svg">
    <!-- Generated with Rich https://www.textualize.io -->
    <style>

    @font-face {{
        font-family: "Fira Code";
        src: local("FiraCode-Regular"),
                url("https://cdnjs.cloudflare.com/ajax/libs/firacode/6.2.0/woff2/FiraCode-Regular.woff2") format("woff2"),
                url("https://cdnjs.cloudflare.com/ajax/libs/firacode/6.2.0/woff/FiraCode-Regular.woff") format("woff");
        font-style: normal;
        font-weight: 400;
    }}
    @font-face {{
        font-family: "Fira Code";
        src: local("FiraCode-Bold"),
                url("https://cdnjs.cloudflare.com/ajax/libs/firacode/6.2.0/woff2/FiraCode-Bold.woff2") format("woff2"),
                url("https://cdnjs.cloudflare.com/ajax/libs/firacode/6.2.0/woff/FiraCode-Bold.woff") format("woff");
        font-style: bold;
        font-weight: 700;
    }}

    .{unique_id}-matrix {{
        font-family: Fira Code, monospace;
        font-size: {char_height}px;
        line-height: {line_height}px;
        font-variant-east-asian: full-width;
    }}

    .{unique_id}-title {{
        font-size: 18px;
        font-weight: bold;
        font-family: arial;
    }}

    {styles}
    </style>

    <defs>
    <clipPath id="{unique_id}-clip-terminal">
      <rect x="0" y="0" width="{terminal_width}" height="{terminal_height}" />
    </clipPath>
    {lines}
    </defs>

    {chrome}
    <g transform="translate({terminal_x}, {terminal_y})" clip-path="url(#{unique_id}-clip-terminal)">
    {backgrounds}
    <g class="{unique_id}-matrix">
    {matrix}
    </g>
    </g>
</svg>
"""

_SVG_FONT_FAMILY = "Rich Fira Code"
_SVG_CLASSES_PREFIX = "rich-svg"