#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
# Copyright 2021 The Matrix.org Foundation C.I.C.
# Copyright 2016 OpenMarket Ltd
# Copyright (C) 2023 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# See the GNU Affero General Public License for more details:
# <https://www.gnu.org/licenses/agpl-3.0.html>.
#
# Originally licensed under the Apache License, Version 2.0:
# <http://www.apache.org/licenses/LICENSE-2.0>.
#
# [This file includes modifications made by New Vector Limited]
#
#
import tempfile
from typing import Callable

import yaml
from parameterized import parameterized

from synapse.config import ConfigError
from synapse.config._base import RootConfig
from synapse.config.homeserver import HomeServerConfig

from tests.config.utils import ConfigFileTestCase

try:
    import hiredis
except ImportError:
    hiredis = None  # type: ignore


class ConfigLoadingFileTestCase(ConfigFileTestCase):
    def test_load_fails_if_server_name_missing(self) -> None:
        self.generate_config_and_remove_lines_containing(["server_name"])
        with self.assertRaises(ConfigError):
            HomeServerConfig.load_config("", ["-c", self.config_file])
        with self.assertRaises(ConfigError):
            HomeServerConfig.load_or_generate_config("", ["-c", self.config_file])

    def test_generates_and_loads_macaroon_secret_key(self) -> None:
        self.generate_config()

        with open(self.config_file) as f:
            raw = yaml.safe_load(f)
        self.assertIn("macaroon_secret_key", raw)

        config = HomeServerConfig.load_config("", ["-c", self.config_file])
        self.assertTrue(
            hasattr(config.key, "macaroon_secret_key"),
            "Want config to have attr macaroon_secret_key",
        )
        if len(config.key.macaroon_secret_key) < 5:
            self.fail(
                "Want macaroon secret key to be string of at least length 5,"
                "was: %r" % (config.key.macaroon_secret_key,)
            )

        config2 = HomeServerConfig.load_or_generate_config("", ["-c", self.config_file])
        assert config2 is not None
        self.assertTrue(
            hasattr(config2.key, "macaroon_secret_key"),
            "Want config to have attr macaroon_secret_key",
        )
        if len(config2.key.macaroon_secret_key) < 5:
            self.fail(
                "Want macaroon secret key to be string of at least length 5,"
                "was: %r" % (config2.key.macaroon_secret_key,)
            )

    def test_load_succeeds_if_macaroon_secret_key_missing(self) -> None:
        self.generate_config_and_remove_lines_containing(["macaroon"])
        config1 = HomeServerConfig.load_config("", ["-c", self.config_file])
        config2 = HomeServerConfig.load_config("", ["-c", self.config_file])
        config3 = HomeServerConfig.load_or_generate_config("", ["-c", self.config_file])
        assert config1 is not None
        assert config2 is not None
        assert config3 is not None
        self.assertEqual(
            config1.key.macaroon_secret_key, config2.key.macaroon_secret_key
        )
        self.assertEqual(
            config1.key.macaroon_secret_key, config3.key.macaroon_secret_key
        )

    def test_disable_registration(self) -> None:
        self.generate_config()
        self.add_lines_to_config(
            ["enable_registration: true", "disable_registration: true"]
        )
        # Check that disable_registration clobbers enable_registration.
        config = HomeServerConfig.load_config("", ["-c", self.config_file])
        self.assertFalse(config.registration.enable_registration)

        config2 = HomeServerConfig.load_or_generate_config("", ["-c", self.config_file])
        assert config2 is not None
        self.assertFalse(config2.registration.enable_registration)

        # Check that either config value is clobbered by the command line.
        config3 = HomeServerConfig.load_or_generate_config(
            "", ["-c", self.config_file, "--enable-registration"]
        )
        assert config3 is not None
        self.assertTrue(config3.registration.enable_registration)

    def test_stats_enabled(self) -> None:
        self.generate_config_and_remove_lines_containing(["enable_metrics"])
        self.add_lines_to_config(["enable_metrics: true"])

        # The default Metrics Flags are off by default.
        config = HomeServerConfig.load_config("", ["-c", self.config_file])
        self.assertFalse(config.metrics.metrics_flags.known_servers)

    def test_depreciated_identity_server_flag_throws_error(self) -> None:
        self.generate_config()
        # Needed to ensure that actual key/value pair added below don't end up on a line with a comment
        self.add_lines_to_config([" "])
        # Check that presence of "trust_identity_server_for_password" throws config error
        self.add_lines_to_config(["trust_identity_server_for_password_resets: true"])
        with self.assertRaises(ConfigError):
            HomeServerConfig.load_config("", ["-c", self.config_file])

    @parameterized.expand(
        [
            "turn_shared_secret_path: /does/not/exist",
            "registration_shared_secret_path: /does/not/exist",
            "macaroon_secret_key_path: /does/not/exist",
            "experimental_features:\n  msc3861:\n    client_secret_path: /does/not/exist",
            "experimental_features:\n  msc3861:\n    admin_token_path: /does/not/exist",
            *["redis:\n  enabled: true\n  password_path: /does/not/exist"]
            * (hiredis is not None),
        ]
    )
    def test_secret_files_missing(self, config_str: str) -> None:
        self.generate_config()
        self.add_lines_to_config(["", config_str])

        with self.assertRaises(ConfigError):
            HomeServerConfig.load_config("", ["-c", self.config_file])

    @parameterized.expand(
        [
            (
                "turn_shared_secret_path: {}",
                lambda c: c.voip.turn_shared_secret.encode("utf-8"),
            ),
            (
                "registration_shared_secret_path: {}",
                lambda c: c.registration.registration_shared_secret.encode("utf-8"),
            ),
            (
                "macaroon_secret_key_path: {}",
                lambda c: c.key.macaroon_secret_key,
            ),
            (
                "experimental_features:\n  msc3861:\n    client_secret_path: {}",
                lambda c: c.experimental.msc3861.client_secret().encode("utf-8"),
            ),
            (
                "experimental_features:\n  msc3861:\n    admin_token_path: {}",
                lambda c: c.experimental.msc3861.admin_token().encode("utf-8"),
            ),
            *[
                (
                    "redis:\n  enabled: true\n  password_path: {}",
                    lambda c: c.redis.redis_password.encode("utf-8"),
                )
            ]
            * (hiredis is not None),
        ]
    )
    def test_secret_files_existing(
        self, config_line: str, get_secret: Callable[[RootConfig], str]
    ) -> None:
        self.generate_config_and_remove_lines_containing(
            ["registration_shared_secret", "macaroon_secret_key"]
        )
        with tempfile.NamedTemporaryFile(buffering=0) as secret_file:
            secret_file.write(b"53C237")

            self.add_lines_to_config(["", config_line.format(secret_file.name)])
            config = HomeServerConfig.load_config("", ["-c", self.config_file])

            self.assertEqual(get_secret(config), b"53C237")
