# -*- coding: utf-8 -*-

"""
certifi.py
~~~~~~~~~~

This module returns the installation location of cacert.pem or its contents.
"""
import os

## FFF change--`requests` already uses it's utils.extract_zipped_paths()
## on this, so the importlib.resources below is both redundant and
## sub-optimal--it apparently creates a new temp copy *every* time
## where() is called...

# try:
#     from importlib.resources import path as get_path, read_text

#     _CACERT_CTX = None
#     _CACERT_PATH = None

#     def where():
#         # This is slightly terrible, but we want to delay extracting the file
#         # in cases where we're inside of a zipimport situation until someone
#         # actually calls where(), but we don't want to re-extract the file
#         # on every call of where(), so we'll do it once then store it in a
#         # global variable.
#         global _CACERT_CTX
#         global _CACERT_PATH
#         if _CACERT_PATH is None:
#             # This is slightly janky, the importlib.resources API wants you to
#             # manage the cleanup of this file, so it doesn't actually return a
#             # path, it returns a context manager that will give you the path
#             # when you enter it and will do any cleanup when you leave it. In
#             # the common case of not needing a temporary file, it will just
#             # return the file system location and the __exit__() is a no-op.
#             #
#             # We also have to hold onto the actual context manager, because
#             # it will do the cleanup whenever it gets garbage collected, so
#             # we will also store that at the global level as well.
#             _CACERT_CTX = get_path("certifi", "cacert.pem")
#             _CACERT_PATH = str(_CACERT_CTX.__enter__())

#         return _CACERT_PATH


# except ImportError:

# This fallback will work for Python versions prior to 3.7 that lack the
# importlib.resources module but relies on the existing `where` function
# so won't address issues with environments like PyOxidizer that don't set
# __file__ on modules.
def read_text(_module, _path, encoding="ascii"):
    with open(where(), "r", encoding=encoding) as data:
        return data.read()

# If we don't have importlib.resources, then we will just do the old logic
# of assuming we're on the filesystem and munge the path directly.
def where():
    f = os.path.dirname(__file__)

    return os.path.join(f, "cacert.pem")


def contents():
    return read_text("certifi", "cacert.pem", encoding="ascii")