"""Internationalization and localization support.

This module provides internationalization (I18N) and localization (L10N)
support for your Python programs by providing an interface to the GNU gettext
message catalog library.

I18N refers to the operation by which a program is made aware of multiple
languages.  L10N refers to the adaptation of your program, once
internationalized, to the local language and cultural habits.

"""

import io
import sys
from _typeshed import StrPath
from collections.abc import Callable, Container, Iterable, Sequence
from typing import Any, Final, Literal, Protocol, TypeVar, overload, type_check_only
from typing_extensions import deprecated

__all__ = [
    "NullTranslations",
    "GNUTranslations",
    "Catalog",
    "find",
    "translation",
    "install",
    "textdomain",
    "bindtextdomain",
    "dgettext",
    "dngettext",
    "gettext",
    "ngettext",
    "dnpgettext",
    "dpgettext",
    "npgettext",
    "pgettext",
]

if sys.version_info < (3, 11):
    __all__ += ["bind_textdomain_codeset", "ldgettext", "ldngettext", "lgettext", "lngettext"]

@type_check_only
class _TranslationsReader(Protocol):
    def read(self) -> bytes: ...
    # optional:
    # name: str

class NullTranslations:
    def __init__(self, fp: _TranslationsReader | None = None) -> None: ...
    def _parse(self, fp: _TranslationsReader) -> None: ...
    def add_fallback(self, fallback: NullTranslations) -> None: ...
    def gettext(self, message: str) -> str: ...
    def ngettext(self, msgid1: str, msgid2: str, n: int) -> str: ...
    def pgettext(self, context: str, message: str) -> str: ...
    def npgettext(self, context: str, msgid1: str, msgid2: str, n: int) -> str: ...
    def info(self) -> dict[str, str]: ...
    def charset(self) -> str | None: ...
    if sys.version_info < (3, 11):
        @deprecated("Deprecated since Python 3.8; removed in Python 3.11.")
        def output_charset(self) -> str | None: ...
        @deprecated("Deprecated since Python 3.8; removed in Python 3.11.")
        def set_output_charset(self, charset: str) -> None: ...
        @deprecated("Deprecated since Python 3.8; removed in Python 3.11. Use `gettext()` instead.")
        def lgettext(self, message: str) -> str: ...
        @deprecated("Deprecated since Python 3.8; removed in Python 3.11. Use `ngettext()` instead.")
        def lngettext(self, msgid1: str, msgid2: str, n: int) -> str: ...

    def install(self, names: Container[str] | None = None) -> None: ...

class GNUTranslations(NullTranslations):
    LE_MAGIC: Final[int]
    BE_MAGIC: Final[int]
    CONTEXT: str
    VERSIONS: Sequence[int]

@overload
def find(
    domain: str, localedir: StrPath | None = None, languages: Iterable[str] | None = None, all: Literal[False] = False
) -> str | None: ...
@overload
def find(
    domain: str, localedir: StrPath | None = None, languages: Iterable[str] | None = None, *, all: Literal[True]
) -> list[str]: ...
@overload
def find(domain: str, localedir: StrPath | None, languages: Iterable[str] | None, all: Literal[True]) -> list[str]: ...
@overload
def find(domain: str, localedir: StrPath | None = None, languages: Iterable[str] | None = None, all: bool = False) -> Any: ...

_NullTranslationsT = TypeVar("_NullTranslationsT", bound=NullTranslations)

if sys.version_info >= (3, 11):
    @overload
    def translation(
        domain: str,
        localedir: StrPath | None = None,
        languages: Iterable[str] | None = None,
        class_: None = None,
        fallback: Literal[False] = False,
    ) -> GNUTranslations: ...
    @overload
    def translation(
        domain: str,
        localedir: StrPath | None = None,
        languages: Iterable[str] | None = None,
        *,
        class_: Callable[[io.BufferedReader], _NullTranslationsT],
        fallback: Literal[False] = False,
    ) -> _NullTranslationsT: ...
    @overload
    def translation(
        domain: str,
        localedir: StrPath | None,
        languages: Iterable[str] | None,
        class_: Callable[[io.BufferedReader], _NullTranslationsT],
        fallback: Literal[False] = False,
    ) -> _NullTranslationsT: ...
    @overload
    def translation(
        domain: str,
        localedir: StrPath | None = None,
        languages: Iterable[str] | None = None,
        class_: Callable[[io.BufferedReader], NullTranslations] | None = None,
        fallback: bool = False,
    ) -> NullTranslations: ...

    def install(domain: str, localedir: StrPath | None = None, *, names: Container[str] | None = None) -> None: ...
else:
    @overload
    def translation(
        domain: str,
        localedir: StrPath | None = None,
        languages: Iterable[str] | None = None,
        class_: None = None,
        fallback: Literal[False] = False,
        codeset: str | None = ...,
    ) -> GNUTranslations: ...
    @overload
    def translation(
        domain: str,
        localedir: StrPath | None = None,
        languages: Iterable[str] | None = None,
        *,
        class_: Callable[[io.BufferedReader], _NullTranslationsT],
        fallback: Literal[False] = False,
        codeset: str | None = ...,
    ) -> _NullTranslationsT: ...
    @overload
    def translation(
        domain: str,
        localedir: StrPath | None,
        languages: Iterable[str] | None,
        class_: Callable[[io.BufferedReader], _NullTranslationsT],
        fallback: Literal[False] = False,
        codeset: str | None = ...,
    ) -> _NullTranslationsT: ...
    @overload
    def translation(
        domain: str,
        localedir: StrPath | None = None,
        languages: Iterable[str] | None = None,
        class_: Callable[[io.BufferedReader], NullTranslations] | None = None,
        fallback: bool = False,
        codeset: str | None = ...,
    ) -> NullTranslations: ...

    @overload
    def install(domain: str, localedir: StrPath | None = None, names: Container[str] | None = None) -> None: ...
    @overload
    @deprecated("The `codeset` parameter is deprecated since Python 3.8; removed in Python 3.11.")
    def install(domain: str, localedir: StrPath | None, codeset: str | None, /, names: Container[str] | None = None) -> None: ...
    @overload
    @deprecated("The `codeset` parameter is deprecated since Python 3.8; removed in Python 3.11.")
    def install(
        domain: str, localedir: StrPath | None = None, *, codeset: str | None, names: Container[str] | None = None
    ) -> None: ...

def textdomain(domain: str | None = None) -> str: ...
def bindtextdomain(domain: str, localedir: StrPath | None = None) -> str: ...
def dgettext(domain: str, message: str) -> str: ...
def dngettext(domain: str, msgid1: str, msgid2: str, n: int) -> str: ...
def gettext(message: str) -> str: ...
def ngettext(msgid1: str, msgid2: str, n: int) -> str: ...
def pgettext(context: str, message: str) -> str: ...
def dpgettext(domain: str, context: str, message: str) -> str: ...
def npgettext(context: str, msgid1: str, msgid2: str, n: int) -> str: ...
def dnpgettext(domain: str, context: str, msgid1: str, msgid2: str, n: int) -> str: ...

if sys.version_info < (3, 11):
    @deprecated("Deprecated since Python 3.8; removed in Python 3.11. Use `gettext()` instead.")
    def lgettext(message: str) -> str: ...
    @deprecated("Deprecated since Python 3.8; removed in Python 3.11. Use `dgettext()` instead.")
    def ldgettext(domain: str, message: str) -> str: ...
    @deprecated("Deprecated since Python 3.8; removed in Python 3.11. Use `ngettext()` instead.")
    def lngettext(msgid1: str, msgid2: str, n: int) -> str: ...
    @deprecated("Deprecated since Python 3.8; removed in Python 3.11. Use `dngettext()` instead.")
    def ldngettext(domain: str, msgid1: str, msgid2: str, n: int) -> str: ...
    @deprecated("Deprecated since Python 3.8; removed in Python 3.11. Use `bindtextdomain()` instead.")
    def bind_textdomain_codeset(domain: str, codeset: str | None = None) -> str: ...

Catalog = translation

def c2py(plural: str) -> Callable[[int], int]:
    """Gets a C expression as used in PO files for plural forms and returns a
    Python function that implements an equivalent expression.
    """
