import unittest
from datetime import datetime, timezone

from yt_dlp import cookies
from yt_dlp.cookies import (
    CRYPTO_AVAILABLE,
    LinuxChromeCookieDecryptor,
    MacChromeCookieDecryptor,
    WindowsChromeCookieDecryptor,
    YDLLogger,
    parse_safari_cookies,
    pbkdf2_sha1,
)


class MonkeyPatch:
    def __init__(self, module, temporary_values):
        self._module = module
        self._temporary_values = temporary_values
        self._backup_values = {}

    def __enter__(self):
        for name, temp_value in self._temporary_values.items():
            self._backup_values[name] = getattr(self._module, name)
            setattr(self._module, name, temp_value)

    def __exit__(self, exc_type, exc_val, exc_tb):
        for name, backup_value in self._backup_values.items():
            setattr(self._module, name, backup_value)


class TestCookies(unittest.TestCase):
    def test_chrome_cookie_decryptor_linux_derive_key(self):
        key = LinuxChromeCookieDecryptor.derive_key(b'abc')
        self.assertEqual(key, b'7\xa1\xec\xd4m\xfcA\xc7\xb19Z\xd0\x19\xdcM\x17')

    def test_chrome_cookie_decryptor_mac_derive_key(self):
        key = MacChromeCookieDecryptor.derive_key(b'abc')
        self.assertEqual(key, b'Y\xe2\xc0\xd0P\xf6\xf4\xe1l\xc1\x8cQ\xcb|\xcdY')

    def test_chrome_cookie_decryptor_linux_v10(self):
        with MonkeyPatch(cookies, {'_get_linux_keyring_password': lambda *args, **kwargs: b''}):
            encrypted_value = b'v10\xccW%\xcd\xe6\xe6\x9fM" \xa7\xb0\xca\xe4\x07\xd6'
            value = 'USD'
            decryptor = LinuxChromeCookieDecryptor('Chrome', YDLLogger())
            self.assertEqual(decryptor.decrypt(encrypted_value), value)

    def test_chrome_cookie_decryptor_linux_v11(self):
        with MonkeyPatch(cookies, {'_get_linux_keyring_password': lambda *args, **kwargs: b'',
                                   'KEYRING_AVAILABLE': True}):
            encrypted_value = b'v11#\x81\x10>`w\x8f)\xc0\xb2\xc1\r\xf4\x1al\xdd\x93\xfd\xf8\xf8N\xf2\xa9\x83\xf1\xe9o\x0elVQd'
            value = 'tz=Europe.London'
            decryptor = LinuxChromeCookieDecryptor('Chrome', YDLLogger())
            self.assertEqual(decryptor.decrypt(encrypted_value), value)

    @unittest.skipIf(not CRYPTO_AVAILABLE, 'cryptography library not available')
    def test_chrome_cookie_decryptor_windows_v10(self):
        with MonkeyPatch(cookies, {
            '_get_windows_v10_key': lambda *args, **kwargs: b'Y\xef\xad\xad\xeerp\xf0Y\xe6\x9b\x12\xc2<z\x16]\n\xbb\xb8\xcb\xd7\x9bA\xc3\x14e\x99{\xd6\xf4&'
        }):
            encrypted_value = b'v10T\xb8\xf3\xb8\x01\xa7TtcV\xfc\x88\xb8\xb8\xef\x05\xb5\xfd\x18\xc90\x009\xab\xb1\x893\x85)\x87\xe1\xa9-\xa3\xad='
            value = '32101439'
            decryptor = WindowsChromeCookieDecryptor('', YDLLogger())
            self.assertEqual(decryptor.decrypt(encrypted_value), value)

    def test_chrome_cookie_decryptor_mac_v10(self):
        with MonkeyPatch(cookies, {'_get_mac_keyring_password': lambda *args, **kwargs: b'6eIDUdtKAacvlHwBVwvg/Q=='}):
            encrypted_value = b'v10\xb3\xbe\xad\xa1[\x9fC\xa1\x98\xe0\x9a\x01\xd9\xcf\xbfc'
            value = '2021-06-01-22'
            decryptor = MacChromeCookieDecryptor('', YDLLogger())
            self.assertEqual(decryptor.decrypt(encrypted_value), value)

    def test_safari_cookie_parsing(self):
        cookies = \
            b'cook\x00\x00\x00\x01\x00\x00\x00i\x00\x00\x01\x00\x01\x00\x00\x00\x10\x00\x00\x00\x00\x00\x00\x00Y' \
            b'\x00\x00\x00\x00\x00\x00\x00 \x00\x00\x00\x00\x00\x00\x008\x00\x00\x00B\x00\x00\x00F\x00\x00\x00H' \
            b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\x03\xa5>\xc3A\x00\x00\x80\xc3\x07:\xc3A' \
            b'localhost\x00foo\x00/\x00test%20%3Bcookie\x00\x00\x00\x054\x07\x17 \x05\x00\x00\x00Kbplist00\xd1\x01' \
            b'\x02_\x10\x18NSHTTPCookieAcceptPolicy\x10\x02\x08\x0b&\x00\x00\x00\x00\x00\x00\x01\x01\x00\x00\x00' \
            b'\x00\x00\x00\x00\x03\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00('

        jar = parse_safari_cookies(cookies)
        self.assertEqual(len(jar), 1)
        cookie = list(jar)[0]
        self.assertEqual(cookie.domain, 'localhost')
        self.assertEqual(cookie.port, None)
        self.assertEqual(cookie.path, '/')
        self.assertEqual(cookie.name, 'foo')
        self.assertEqual(cookie.value, 'test%20%3Bcookie')
        self.assertFalse(cookie.secure)
        expected_expiration = datetime(2021, 6, 18, 21, 39, 19, tzinfo=timezone.utc)
        self.assertEqual(cookie.expires, int(expected_expiration.timestamp()))

    def test_pbkdf2_sha1(self):
        key = pbkdf2_sha1(b'peanuts', b' ' * 16, 1, 16)
        self.assertEqual(key, b'g\xe1\x8e\x0fQ\x1c\x9b\xf3\xc9`!\xaa\x90\xd9\xd34')