#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
# Copyright 2020 Dirk Klimpel
# 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 urllib.parse

from parameterized import parameterized

from twisted.internet.testing import MemoryReactor

import synapse.rest.admin
from synapse.api.errors import Codes
from synapse.handlers.device import MAX_DEVICE_DISPLAY_NAME_LEN, DeviceWriterHandler
from synapse.rest.client import devices, login
from synapse.server import HomeServer
from synapse.util.clock import Clock

from tests import unittest


class DeviceRestTestCase(unittest.HomeserverTestCase):
    servlets = [
        synapse.rest.admin.register_servlets,
        login.register_servlets,
    ]

    def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
        handler = hs.get_device_handler()
        assert isinstance(handler, DeviceWriterHandler)
        self.handler = handler

        self.admin_user = self.register_user("admin", "pass", admin=True)
        self.admin_user_tok = self.login("admin", "pass")

        self.other_user = self.register_user("user", "pass")
        self.other_user_token = self.login("user", "pass")
        res = self.get_success(self.handler.get_devices_by_user(self.other_user))
        self.other_user_device_id = res[0]["device_id"]

        self.url = "/_synapse/admin/v2/users/%s/devices/%s" % (
            urllib.parse.quote(self.other_user),
            self.other_user_device_id,
        )

    @parameterized.expand(["GET", "PUT", "DELETE"])
    def test_no_auth(self, method: str) -> None:
        """
        Try to get a device of an user without authentication.
        """
        channel = self.make_request(method, self.url, b"{}")

        self.assertEqual(
            401,
            channel.code,
            msg=channel.json_body,
        )
        self.assertEqual(Codes.MISSING_TOKEN, channel.json_body["errcode"])

    @parameterized.expand(["GET", "PUT", "DELETE"])
    def test_requester_is_no_admin(self, method: str) -> None:
        """
        If the user is not a server admin, an error is returned.
        """
        channel = self.make_request(
            method,
            self.url,
            access_token=self.other_user_token,
        )

        self.assertEqual(
            403,
            channel.code,
            msg=channel.json_body,
        )
        self.assertEqual(Codes.FORBIDDEN, channel.json_body["errcode"])

    @parameterized.expand(["GET", "PUT", "DELETE"])
    def test_user_does_not_exist(self, method: str) -> None:
        """
        Tests that a lookup for a user that does not exist returns a 404
        """
        url = (
            "/_synapse/admin/v2/users/@unknown_person:test/devices/%s"
            % self.other_user_device_id
        )

        channel = self.make_request(
            method,
            url,
            access_token=self.admin_user_tok,
        )

        self.assertEqual(404, channel.code, msg=channel.json_body)
        self.assertEqual(Codes.NOT_FOUND, channel.json_body["errcode"])

    @parameterized.expand(["GET", "PUT", "DELETE"])
    def test_user_is_not_local(self, method: str) -> None:
        """
        Tests that a lookup for a user that is not a local returns a 400
        """
        url = (
            "/_synapse/admin/v2/users/@unknown_person:unknown_domain/devices/%s"
            % self.other_user_device_id
        )

        channel = self.make_request(
            method,
            url,
            access_token=self.admin_user_tok,
        )

        self.assertEqual(400, channel.code, msg=channel.json_body)
        self.assertEqual("Can only lookup local users", channel.json_body["error"])

    def test_unknown_device(self) -> None:
        """
        Tests that a lookup for a device that does not exist returns either 404 or 200.
        """
        url = "/_synapse/admin/v2/users/%s/devices/unknown_device" % urllib.parse.quote(
            self.other_user
        )

        channel = self.make_request(
            "GET",
            url,
            access_token=self.admin_user_tok,
        )

        self.assertEqual(404, channel.code, msg=channel.json_body)
        self.assertEqual(Codes.NOT_FOUND, channel.json_body["errcode"])

        channel = self.make_request(
            "PUT",
            url,
            access_token=self.admin_user_tok,
        )

        self.assertEqual(200, channel.code, msg=channel.json_body)

        channel = self.make_request(
            "DELETE",
            url,
            access_token=self.admin_user_tok,
        )

        # Delete unknown device returns status 200
        self.assertEqual(200, channel.code, msg=channel.json_body)

    def test_update_device_too_long_display_name(self) -> None:
        """
        Update a device with a display name that is invalid (too long).
        """
        # Set iniital display name.
        update = {"display_name": "new display"}
        self.get_success(
            self.handler.update_device(
                self.other_user, self.other_user_device_id, update
            )
        )

        # Request to update a device display name with a new value that is longer than allowed.
        update = {"display_name": "a" * (MAX_DEVICE_DISPLAY_NAME_LEN + 1)}

        channel = self.make_request(
            "PUT",
            self.url,
            access_token=self.admin_user_tok,
            content=update,
        )

        self.assertEqual(400, channel.code, msg=channel.json_body)
        self.assertEqual(Codes.TOO_LARGE, channel.json_body["errcode"])

        # Ensure the display name was not updated.
        channel = self.make_request(
            "GET",
            self.url,
            access_token=self.admin_user_tok,
        )

        self.assertEqual(200, channel.code, msg=channel.json_body)
        self.assertEqual("new display", channel.json_body["display_name"])

    def test_update_no_display_name(self) -> None:
        """
        Tests that a update for a device without JSON returns a 200
        """
        # Set iniital display name.
        update = {"display_name": "new display"}
        self.get_success(
            self.handler.update_device(
                self.other_user, self.other_user_device_id, update
            )
        )

        channel = self.make_request(
            "PUT",
            self.url,
            access_token=self.admin_user_tok,
        )

        self.assertEqual(200, channel.code, msg=channel.json_body)

        # Ensure the display name was not updated.
        channel = self.make_request(
            "GET",
            self.url,
            access_token=self.admin_user_tok,
        )

        self.assertEqual(200, channel.code, msg=channel.json_body)
        self.assertEqual("new display", channel.json_body["display_name"])

    def test_update_display_name(self) -> None:
        """
        Tests a normal successful update of display name
        """
        # Set new display_name
        channel = self.make_request(
            "PUT",
            self.url,
            access_token=self.admin_user_tok,
            content={"display_name": "new displayname"},
        )

        self.assertEqual(200, channel.code, msg=channel.json_body)

        # Check new display_name
        channel = self.make_request(
            "GET",
            self.url,
            access_token=self.admin_user_tok,
        )

        self.assertEqual(200, channel.code, msg=channel.json_body)
        self.assertEqual("new displayname", channel.json_body["display_name"])

    def test_get_device(self) -> None:
        """
        Tests that a normal lookup for a device is successfully
        """
        channel = self.make_request(
            "GET",
            self.url,
            access_token=self.admin_user_tok,
        )

        self.assertEqual(200, channel.code, msg=channel.json_body)
        self.assertEqual(self.other_user, channel.json_body["user_id"])
        # Check that all fields are available
        self.assertIn("user_id", channel.json_body)
        self.assertIn("device_id", channel.json_body)
        self.assertIn("display_name", channel.json_body)
        self.assertIn("last_seen_ip", channel.json_body)
        self.assertIn("last_seen_ts", channel.json_body)

    def test_delete_device(self) -> None:
        """
        Tests that a remove of a device is successfully
        """
        # Count number of devies of an user.
        res = self.get_success(self.handler.get_devices_by_user(self.other_user))
        number_devices = len(res)
        self.assertEqual(1, number_devices)

        # Delete device
        channel = self.make_request(
            "DELETE",
            self.url,
            access_token=self.admin_user_tok,
        )

        self.assertEqual(200, channel.code, msg=channel.json_body)

        # Ensure that the number of devices is decreased
        res = self.get_success(self.handler.get_devices_by_user(self.other_user))
        self.assertEqual(number_devices - 1, len(res))


class DevicesRestTestCase(unittest.HomeserverTestCase):
    servlets = [
        synapse.rest.admin.register_servlets,
        devices.register_servlets,
        login.register_servlets,
    ]

    def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
        self.admin_user = self.register_user("admin", "pass", admin=True)
        self.admin_user_tok = self.login("admin", "pass")

        self.other_user = self.register_user("user", "pass")

        self.url = "/_synapse/admin/v2/users/%s/devices" % urllib.parse.quote(
            self.other_user
        )

    def test_no_auth(self) -> None:
        """
        Try to list devices of an user without authentication.
        """
        channel = self.make_request("GET", self.url, b"{}")

        self.assertEqual(
            401,
            channel.code,
            msg=channel.json_body,
        )
        self.assertEqual(Codes.MISSING_TOKEN, channel.json_body["errcode"])

    def test_requester_is_no_admin(self) -> None:
        """
        If the user is not a server admin, an error is returned.
        """
        other_user_token = self.login("user", "pass")

        channel = self.make_request(
            "GET",
            self.url,
            access_token=other_user_token,
        )

        self.assertEqual(
            403,
            channel.code,
            msg=channel.json_body,
        )
        self.assertEqual(Codes.FORBIDDEN, channel.json_body["errcode"])

    def test_user_does_not_exist(self) -> None:
        """
        Tests that a lookup for a user that does not exist returns a 404
        """
        url = "/_synapse/admin/v2/users/@unknown_person:test/devices"
        channel = self.make_request(
            "GET",
            url,
            access_token=self.admin_user_tok,
        )

        self.assertEqual(404, channel.code, msg=channel.json_body)
        self.assertEqual(Codes.NOT_FOUND, channel.json_body["errcode"])

    def test_user_is_not_local(self) -> None:
        """
        Tests that a lookup for a user that is not a local returns a 400
        """
        url = "/_synapse/admin/v2/users/@unknown_person:unknown_domain/devices"

        channel = self.make_request(
            "GET",
            url,
            access_token=self.admin_user_tok,
        )

        self.assertEqual(400, channel.code, msg=channel.json_body)
        self.assertEqual("Can only lookup local users", channel.json_body["error"])

    def test_user_has_no_devices(self) -> None:
        """
        Tests that a normal lookup for devices is successfully
        if user has no devices
        """

        # Get devices
        channel = self.make_request(
            "GET",
            self.url,
            access_token=self.admin_user_tok,
        )

        self.assertEqual(200, channel.code, msg=channel.json_body)
        self.assertEqual(0, channel.json_body["total"])
        self.assertEqual(0, len(channel.json_body["devices"]))

    @unittest.override_config(
        {"experimental_features": {"msc2697_enabled": False, "msc3814_enabled": True}}
    )
    def test_get_devices(self) -> None:
        """
        Tests that a normal lookup for devices is successfully
        """
        # Create devices
        number_devices = 5
        # we create 2 fewer devices in the loop, because we will create another
        # login after the loop, and we will create a dehydrated device
        for _ in range(number_devices - 2):
            self.login("user", "pass")

        other_user_token = self.login("user", "pass")
        dehydrated_device_url = (
            "/_matrix/client/unstable/org.matrix.msc3814.v1/dehydrated_device"
        )
        content = {
            "device_data": {
                "algorithm": "m.dehydration.v1.olm",
            },
            "device_id": "dehydrated_device",
            "initial_device_display_name": "foo bar",
            "device_keys": {
                "user_id": "@user:test",
                "device_id": "dehydrated_device",
                "valid_until_ts": "80",
                "algorithms": [
                    "m.olm.curve25519-aes-sha2",
                ],
                "keys": {
                    "<algorithm>:<device_id>": "<key_base64>",
                },
                "signatures": {
                    "@user:test": {"<algorithm>:<device_id>": "<signature_base64>"}
                },
            },
            "fallback_keys": {
                "alg1:device1": "f4llb4ckk3y",
                "signed_<algorithm>:<device_id>": {
                    "fallback": "true",
                    "key": "f4llb4ckk3y",
                    "signatures": {
                        "@user:test": {"<algorithm>:<device_id>": "<key_base64>"}
                    },
                },
            },
            "one_time_keys": {"alg1:k1": "0net1m3k3y"},
        }
        self.make_request(
            "PUT",
            dehydrated_device_url,
            access_token=other_user_token,
            content=content,
        )

        # Get devices
        channel = self.make_request(
            "GET",
            self.url,
            access_token=self.admin_user_tok,
        )

        self.assertEqual(200, channel.code, msg=channel.json_body)
        self.assertEqual(number_devices, channel.json_body["total"])
        self.assertEqual(number_devices, len(channel.json_body["devices"]))
        self.assertEqual(self.other_user, channel.json_body["devices"][0]["user_id"])
        # Check that all fields are available, and that the dehydrated device is marked as dehydrated
        found_dehydrated = False
        for d in channel.json_body["devices"]:
            self.assertIn("user_id", d)
            self.assertIn("device_id", d)
            self.assertIn("display_name", d)
            self.assertIn("last_seen_ip", d)
            self.assertIn("last_seen_ts", d)
            if d["device_id"] == "dehydrated_device":
                self.assertTrue(d.get("dehydrated"))
                found_dehydrated = True
            else:
                # Either the field is not present, or set to False
                self.assertFalse(d.get("dehydrated"))

        self.assertTrue(found_dehydrated)


class DeleteDevicesRestTestCase(unittest.HomeserverTestCase):
    servlets = [
        synapse.rest.admin.register_servlets,
        login.register_servlets,
    ]

    def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
        self.handler = hs.get_device_handler()

        self.admin_user = self.register_user("admin", "pass", admin=True)
        self.admin_user_tok = self.login("admin", "pass")

        self.other_user = self.register_user("user", "pass")

        self.url = "/_synapse/admin/v2/users/%s/delete_devices" % urllib.parse.quote(
            self.other_user
        )

    def test_no_auth(self) -> None:
        """
        Try to delete devices of an user without authentication.
        """
        channel = self.make_request("POST", self.url, b"{}")

        self.assertEqual(
            401,
            channel.code,
            msg=channel.json_body,
        )
        self.assertEqual(Codes.MISSING_TOKEN, channel.json_body["errcode"])

    def test_requester_is_no_admin(self) -> None:
        """
        If the user is not a server admin, an error is returned.
        """
        other_user_token = self.login("user", "pass")

        channel = self.make_request(
            "POST",
            self.url,
            access_token=other_user_token,
        )

        self.assertEqual(
            403,
            channel.code,
            msg=channel.json_body,
        )
        self.assertEqual(Codes.FORBIDDEN, channel.json_body["errcode"])

    def test_user_does_not_exist(self) -> None:
        """
        Tests that a lookup for a user that does not exist returns a 404
        """
        url = "/_synapse/admin/v2/users/@unknown_person:test/delete_devices"
        channel = self.make_request(
            "POST",
            url,
            access_token=self.admin_user_tok,
        )

        self.assertEqual(404, channel.code, msg=channel.json_body)
        self.assertEqual(Codes.NOT_FOUND, channel.json_body["errcode"])

    def test_user_is_not_local(self) -> None:
        """
        Tests that a lookup for a user that is not a local returns a 400
        """
        url = "/_synapse/admin/v2/users/@unknown_person:unknown_domain/delete_devices"

        channel = self.make_request(
            "POST",
            url,
            access_token=self.admin_user_tok,
        )

        self.assertEqual(400, channel.code, msg=channel.json_body)
        self.assertEqual("Can only lookup local users", channel.json_body["error"])

    def test_unknown_devices(self) -> None:
        """
        Tests that a remove of a device that does not exist returns 200.
        """
        channel = self.make_request(
            "POST",
            self.url,
            access_token=self.admin_user_tok,
            content={"devices": ["unknown_device1", "unknown_device2"]},
        )

        # Delete unknown devices returns status 200
        self.assertEqual(200, channel.code, msg=channel.json_body)

    def test_delete_devices(self) -> None:
        """
        Tests that a remove of devices is successfully
        """

        # Create devices
        number_devices = 5
        for _ in range(number_devices):
            self.login("user", "pass")

        # Get devices
        res = self.get_success(self.handler.get_devices_by_user(self.other_user))
        self.assertEqual(number_devices, len(res))

        # Create list of device IDs
        device_ids = []
        for d in res:
            device_ids.append(str(d["device_id"]))

        # Delete devices
        channel = self.make_request(
            "POST",
            self.url,
            access_token=self.admin_user_tok,
            content={"devices": device_ids},
        )

        self.assertEqual(200, channel.code, msg=channel.json_body)

        res = self.get_success(self.handler.get_devices_by_user(self.other_user))
        self.assertEqual(0, len(res))