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

from django.conf import settings

import os
import shutil
import ujson
import io
from PIL import Image

from mock import patch, MagicMock
from typing import Any, Dict, List, Set, Optional, Tuple, Callable, \
    FrozenSet
from boto.s3.connection import Location, S3Connection

from zerver.lib.export import (
    do_export_realm,
    export_files_from_s3,
    export_usermessages_batch,
    do_export_user,
)
from zerver.lib.import_realm import (
    do_import_realm,
    get_incoming_message_ids,
)
from zerver.lib.avatar_hash import (
    user_avatar_path,
)
from zerver.lib.upload import (
    claim_attachment,
    upload_message_file,
    upload_emoji_image,
    upload_avatar_image,
)
from zerver.lib.utils import (
    query_chunker,
)
from zerver.lib.test_classes import (
    ZulipTestCase,
)
from zerver.lib.test_helpers import (
    use_s3_backend,
)

from zerver.lib.topic_mutes import (
    add_topic_mute,
)
from zerver.lib.bot_lib import (
    StateHandler,
)
from zerver.lib.bot_config import (
    set_bot_config
)
from zerver.lib.actions import (
    do_create_user,
)

from zerver.lib.test_runner import slow

from zerver.models import (
    Message,
    Realm,
    Stream,
    UserProfile,
    Subscription,
    Attachment,
    RealmEmoji,
    Recipient,
    UserMessage,
    CustomProfileField,
    CustomProfileFieldValue,
    RealmAuditLog,
    Huddle,
    UserHotspot,
    MutedTopic,
    UserGroup,
    UserGroupMembership,
    BotStorageData,
    BotConfigData,
    get_active_streams,
    get_realm,
    get_stream,
    get_stream_recipient,
    get_personal_recipient,
    get_huddle_hash,
)

from zerver.lib.test_helpers import (
    get_test_image_file,
)

def rm_tree(path: str) -> None:
    if os.path.exists(path):
        shutil.rmtree(path)

class QueryUtilTest(ZulipTestCase):
    def _create_messages(self) -> None:
        for email in [self.example_email('cordelia'),
                      self.example_email('hamlet'),
                      self.example_email('iago')]:
            for _ in range(5):
                self.send_personal_message(email, self.example_email('othello'))

    @slow('creates lots of data')
    def test_query_chunker(self) -> None:
        self._create_messages()

        cordelia = self.example_user('cordelia')
        hamlet = self.example_user('hamlet')

        def get_queries() -> List[Any]:
            queries = [
                Message.objects.filter(sender_id=cordelia.id),
                Message.objects.filter(sender_id=hamlet.id),
                Message.objects.exclude(sender_id__in=[cordelia.id, hamlet.id])
            ]
            return queries

        for query in get_queries():
            # For our test to be meaningful, we want non-empty queries
            # at first
            assert len(list(query)) > 0

        queries = get_queries()

        all_msg_ids = set()  # type: Set[int]
        chunker = query_chunker(
            queries=queries,
            id_collector=all_msg_ids,
            chunk_size=20,
        )

        all_row_ids = []
        for chunk in chunker:
            for row in chunk:
                all_row_ids.append(row.id)

        self.assertEqual(all_row_ids, sorted(all_row_ids))
        self.assertEqual(len(all_msg_ids), len(Message.objects.all()))

        # Now just search for cordelia/hamlet.  Note that we don't really
        # need the order_by here, but it should be harmless.
        queries = [
            Message.objects.filter(sender_id=cordelia.id).order_by('id'),
            Message.objects.filter(sender_id=hamlet.id),
        ]
        all_msg_ids = set()
        chunker = query_chunker(
            queries=queries,
            id_collector=all_msg_ids,
            chunk_size=7,  # use a different size
        )
        list(chunker)  # exhaust the iterator
        self.assertEqual(
            len(all_msg_ids),
            len(Message.objects.filter(sender_id__in=[cordelia.id, hamlet.id]))
        )

        # Try just a single query to validate chunking.
        queries = [
            Message.objects.exclude(sender_id=cordelia.id),
        ]
        all_msg_ids = set()
        chunker = query_chunker(
            queries=queries,
            id_collector=all_msg_ids,
            chunk_size=11,  # use a different size each time
        )
        list(chunker)  # exhaust the iterator
        self.assertEqual(
            len(all_msg_ids),
            len(Message.objects.exclude(sender_id=cordelia.id))
        )
        self.assertTrue(len(all_msg_ids) > 15)

        # Verify assertions about disjoint-ness.
        queries = [
            Message.objects.exclude(sender_id=cordelia.id),
            Message.objects.filter(sender_id=hamlet.id),
        ]
        all_msg_ids = set()
        chunker = query_chunker(
            queries=queries,
            id_collector=all_msg_ids,
            chunk_size=13,  # use a different size each time
        )
        with self.assertRaises(AssertionError):
            list(chunker)  # exercise the iterator

        # Try to confuse things with ids part of the query...
        queries = [
            Message.objects.filter(id__lte=10),
            Message.objects.filter(id__gt=10),
        ]
        all_msg_ids = set()
        chunker = query_chunker(
            queries=queries,
            id_collector=all_msg_ids,
            chunk_size=11,  # use a different size each time
        )
        self.assertEqual(len(all_msg_ids), 0)  # until we actually use the iterator
        list(chunker)  # exhaust the iterator
        self.assertEqual(len(all_msg_ids), len(Message.objects.all()))

        # Verify that we can just get the first chunk with a next() call.
        queries = [
            Message.objects.all(),
        ]
        all_msg_ids = set()
        chunker = query_chunker(
            queries=queries,
            id_collector=all_msg_ids,
            chunk_size=10,  # use a different size each time
        )
        first_chunk = next(chunker)  # type: ignore
        self.assertEqual(len(first_chunk), 10)
        self.assertEqual(len(all_msg_ids), 10)
        expected_msg = Message.objects.all()[0:10][5]
        actual_msg = first_chunk[5]
        self.assertEqual(actual_msg.content, expected_msg.content)
        self.assertEqual(actual_msg.sender_id, expected_msg.sender_id)


class ImportExportTest(ZulipTestCase):

    def setUp(self) -> None:
        rm_tree(settings.LOCAL_UPLOADS_DIR)

    def _make_output_dir(self) -> str:
        output_dir = 'var/test-export'
        rm_tree(output_dir)
        os.makedirs(output_dir, exist_ok=True)
        return output_dir

    def _export_realm(self, realm: Realm, exportable_user_ids: Optional[Set[int]]=None) -> Dict[str, Any]:
        output_dir = self._make_output_dir()
        with patch('logging.info'), patch('zerver.lib.export.create_soft_link'):
            do_export_realm(
                realm=realm,
                output_dir=output_dir,
                threads=0,
                exportable_user_ids=exportable_user_ids,
            )
            # TODO: Process the second partial file, which can be created
            #       for certain edge cases.
            export_usermessages_batch(
                input_path=os.path.join(output_dir, 'messages-000001.json.partial'),
                output_path=os.path.join(output_dir, 'messages-000001.json')
            )

        def read_file(fn: str) -> Any:
            full_fn = os.path.join(output_dir, fn)
            with open(full_fn) as f:
                return ujson.load(f)

        result = {}
        result['realm'] = read_file('realm.json')
        result['attachment'] = read_file('attachment.json')
        result['message'] = read_file('messages-000001.json')
        result['uploads_dir'] = os.path.join(output_dir, 'uploads')
        result['uploads_dir_records'] = read_file(os.path.join('uploads', 'records.json'))
        result['emoji_dir'] = os.path.join(output_dir, 'emoji')
        result['emoji_dir_records'] = read_file(os.path.join('emoji', 'records.json'))
        result['avatar_dir'] = os.path.join(output_dir, 'avatars')
        result['avatar_dir_records'] = read_file(os.path.join('avatars', 'records.json'))
        return result

    def _setup_export_files(self) -> Tuple[str, str, str, bytes]:
        realm = Realm.objects.get(string_id='zulip')
        message = Message.objects.all()[0]
        user_profile = message.sender
        url = upload_message_file(u'dummy.txt', len(b'zulip!'), u'text/plain', b'zulip!', user_profile)
        attachment_path_id = url.replace('/user_uploads/', '')
        claim_attachment(
            user_profile=user_profile,
            path_id=attachment_path_id,
            message=message,
            is_message_realm_public=True
        )
        avatar_path_id = user_avatar_path(user_profile)
        original_avatar_path_id = avatar_path_id + ".original"

        emoji_path = RealmEmoji.PATH_ID_TEMPLATE.format(
            realm_id=realm.id,
            emoji_file_name='1.png',
        )

        with get_test_image_file('img.png') as img_file:
            upload_emoji_image(img_file, '1.png', user_profile)
        with get_test_image_file('img.png') as img_file:
            upload_avatar_image(img_file, user_profile, user_profile)
        test_image = open(get_test_image_file('img.png').name, 'rb').read()
        message.sender.avatar_source = 'U'
        message.sender.save()

        return attachment_path_id, emoji_path, original_avatar_path_id, test_image

    """
    Tests for export
    """

    def test_export_files_from_local(self) -> None:
        realm = Realm.objects.get(string_id='zulip')
        path_id, emoji_path, original_avatar_path_id, test_image = self._setup_export_files()
        full_data = self._export_realm(realm)

        data = full_data['attachment']
        self.assertEqual(len(data['zerver_attachment']), 1)
        record = data['zerver_attachment'][0]
        self.assertEqual(record['path_id'], path_id)

        # Test uploads
        fn = os.path.join(full_data['uploads_dir'], path_id)
        with open(fn) as f:
            self.assertEqual(f.read(), 'zulip!')
        records = full_data['uploads_dir_records']
        self.assertEqual(records[0]['path'], path_id)
        self.assertEqual(records[0]['s3_path'], path_id)

        # Test emojis
        fn = os.path.join(full_data['emoji_dir'], emoji_path)
        fn = fn.replace('1.png', '')
        self.assertEqual('1.png', os.listdir(fn)[0])
        records = full_data['emoji_dir_records']
        self.assertEqual(records[0]['file_name'], '1.png')
        self.assertEqual(records[0]['path'], '1/emoji/images/1.png')
        self.assertEqual(records[0]['s3_path'], '1/emoji/images/1.png')

        # Test avatars
        fn = os.path.join(full_data['avatar_dir'], original_avatar_path_id)
        fn_data = open(fn, 'rb').read()
        self.assertEqual(fn_data, test_image)
        records = full_data['avatar_dir_records']
        record_path = [record['path'] for record in records]
        record_s3_path = [record['s3_path'] for record in records]
        self.assertIn(original_avatar_path_id, record_path)
        self.assertIn(original_avatar_path_id, record_s3_path)

    @use_s3_backend
    def test_export_files_from_s3(self) -> None:
        conn = S3Connection(settings.S3_KEY, settings.S3_SECRET_KEY)
        conn.create_bucket(settings.S3_AUTH_UPLOADS_BUCKET)
        conn.create_bucket(settings.S3_AVATAR_BUCKET)

        realm = Realm.objects.get(string_id='zulip')
        attachment_path_id, emoji_path, original_avatar_path_id, test_image = self._setup_export_files()
        full_data = self._export_realm(realm)

        data = full_data['attachment']
        self.assertEqual(len(data['zerver_attachment']), 1)
        record = data['zerver_attachment'][0]
        self.assertEqual(record['path_id'], attachment_path_id)

        def check_variable_type(user_profile_id: int, realm_id: int) -> None:
            self.assertEqual(type(user_profile_id), int)
            self.assertEqual(type(realm_id), int)

        # Test uploads
        fields = attachment_path_id.split('/')
        fn = os.path.join(full_data['uploads_dir'], os.path.join(fields[0], fields[1], fields[2]))
        with open(fn) as f:
            self.assertEqual(f.read(), 'zulip!')
        records = full_data['uploads_dir_records']
        self.assertEqual(records[0]['path'], os.path.join(fields[0], fields[1], fields[2]))
        self.assertEqual(records[0]['s3_path'], attachment_path_id)
        check_variable_type(records[0]['user_profile_id'], records[0]['realm_id'])

        # Test emojis
        fn = os.path.join(full_data['emoji_dir'], emoji_path)
        fn = fn.replace('1.png', '')
        self.assertIn('1.png', os.listdir(fn))
        records = full_data['emoji_dir_records']
        self.assertEqual(records[0]['file_name'], '1.png')
        self.assertTrue('last_modified' in records[0])
        self.assertEqual(records[0]['path'], '1/emoji/images/1.png')
        self.assertEqual(records[0]['s3_path'], '1/emoji/images/1.png')
        check_variable_type(records[0]['user_profile_id'], records[0]['realm_id'])

        # Test avatars
        fn = os.path.join(full_data['avatar_dir'], original_avatar_path_id)
        fn_data = open(fn, 'rb').read()
        self.assertEqual(fn_data, test_image)
        records = full_data['avatar_dir_records']
        record_path = [record['path'] for record in records]
        record_s3_path = [record['s3_path'] for record in records]
        self.assertIn(original_avatar_path_id, record_path)
        self.assertIn(original_avatar_path_id, record_s3_path)
        check_variable_type(records[0]['user_profile_id'], records[0]['realm_id'])

    def test_zulip_realm(self) -> None:
        realm = Realm.objects.get(string_id='zulip')
        realm_emoji = RealmEmoji.objects.get(realm=realm)
        realm_emoji.delete()
        full_data = self._export_realm(realm)
        realm_emoji.save()

        data = full_data['realm']
        self.assertEqual(len(data['zerver_userprofile_crossrealm']), 0)
        self.assertEqual(len(data['zerver_userprofile_mirrordummy']), 0)

        def get_set(table: str, field: str) -> Set[str]:
            values = set(r[field] for r in data[table])
            # print('set(%s)' % sorted(values))
            return values

        def find_by_id(table: str, db_id: int) -> Dict[str, Any]:
            return [
                r for r in data[table]
                if r['id'] == db_id][0]

        exported_user_emails = get_set('zerver_userprofile', 'email')
        self.assertIn(self.example_email('cordelia'), exported_user_emails)
        self.assertIn('default-bot@zulip.com', exported_user_emails)
        self.assertIn('emailgateway@zulip.com', exported_user_emails)

        exported_streams = get_set('zerver_stream', 'name')
        self.assertEqual(
            exported_streams,
            set([u'Denmark', u'Rome', u'Scotland', u'Venice', u'Verona'])
        )

        data = full_data['message']
        um = UserMessage.objects.all()[0]
        exported_um = find_by_id('zerver_usermessage', um.id)
        self.assertEqual(exported_um['message'], um.message_id)
        self.assertEqual(exported_um['user_profile'], um.user_profile_id)

        exported_message = find_by_id('zerver_message', um.message_id)
        self.assertEqual(exported_message['content'], um.message.content)

        # TODO, extract get_set/find_by_id, so we can split this test up

        # Now, restrict users
        cordelia = self.example_user('cordelia')
        hamlet = self.example_user('hamlet')
        user_ids = set([cordelia.id, hamlet.id])

        realm_emoji = RealmEmoji.objects.get(realm=realm)
        realm_emoji.delete()
        full_data = self._export_realm(realm, exportable_user_ids=user_ids)
        realm_emoji.save()

        data = full_data['realm']
        exported_user_emails = get_set('zerver_userprofile', 'email')
        self.assertIn(self.example_email('cordelia'), exported_user_emails)
        self.assertIn(self.example_email('hamlet'), exported_user_emails)
        self.assertNotIn('default-bot@zulip.com', exported_user_emails)
        self.assertNotIn(self.example_email('iago'), exported_user_emails)

        dummy_user_emails = get_set('zerver_userprofile_mirrordummy', 'email')
        self.assertIn(self.example_email('iago'), dummy_user_emails)
        self.assertNotIn(self.example_email('cordelia'), dummy_user_emails)

    def test_export_single_user(self) -> None:
        output_dir = self._make_output_dir()
        cordelia = self.example_user('cordelia')

        with patch('logging.info'):
            do_export_user(cordelia, output_dir)

        def read_file(fn: str) -> Any:
            full_fn = os.path.join(output_dir, fn)
            with open(full_fn) as f:
                return ujson.load(f)

        def get_set(data: List[Dict[str, Any]], field: str) -> Set[str]:
            values = set(r[field] for r in data)
            # print('set(%s)' % sorted(values))
            return values

        messages = read_file('messages-000001.json')
        user = read_file('user.json')

        exported_user_id = get_set(user['zerver_userprofile'], 'id')
        self.assertEqual(exported_user_id, set([cordelia.id]))
        exported_user_email = get_set(user['zerver_userprofile'], 'email')
        self.assertEqual(exported_user_email, set([cordelia.email]))

        exported_recipient_type_id = get_set(user['zerver_recipient'], 'type_id')
        self.assertIn(cordelia.id, exported_recipient_type_id)

        exported_stream_id = get_set(user['zerver_stream'], 'id')
        self.assertIn(list(exported_stream_id)[0], exported_recipient_type_id)

        exported_recipient_id = get_set(user['zerver_recipient'], 'id')
        exported_subscription_recipient = get_set(user['zerver_subscription'], 'recipient')
        self.assertEqual(exported_recipient_id, exported_subscription_recipient)

        exported_messages_recipient = get_set(messages['zerver_message'], 'recipient')
        self.assertIn(list(exported_messages_recipient)[0], exported_recipient_id)

    """
    Tests for import_realm
    """
    def test_import_realm(self) -> None:

        original_realm = Realm.objects.get(string_id='zulip')
        RealmEmoji.objects.get(realm=original_realm).delete()
        # data to test import of huddles
        huddle = [
            self.example_email('hamlet'),
            self.example_email('othello')
        ]
        self.send_huddle_message(
            self.example_email('cordelia'), huddle, 'test huddle message'
        )

        # data to test import of hotspots
        sample_user = self.example_user('hamlet')

        UserHotspot.objects.create(
            user=sample_user, hotspot='intro_streams'
        )

        # data to test import of muted topic
        stream = get_stream(u'Verona', original_realm)
        add_topic_mute(
            user_profile=sample_user,
            stream_id=stream.id,
            recipient_id=get_stream_recipient(stream.id).id,
            topic_name=u'Verona2')

        # data to test import of botstoragedata and botconfigdata
        bot_profile = do_create_user(
            email="bot-1@zulip.com",
            password="test",
            realm=original_realm,
            full_name="bot",
            short_name="bot",
            bot_type=UserProfile.EMBEDDED_BOT,
            bot_owner=sample_user)
        storage = StateHandler(bot_profile)
        storage.put('some key', 'some value')

        set_bot_config(bot_profile, 'entry 1', 'value 1')

        self._export_realm(original_realm)

        with patch('logging.info'):
            do_import_realm('var/test-export', 'test-zulip')

        # sanity checks

        # test realm
        self.assertTrue(Realm.objects.filter(string_id='test-zulip').exists())
        imported_realm = Realm.objects.get(string_id='test-zulip')
        self.assertNotEqual(imported_realm.id, original_realm.id)

        def assert_realm_values(f: Callable[[Realm], Any], equal: bool=True) -> None:
            orig_realm_result = f(original_realm)
            imported_realm_result = f(imported_realm)
            # orig_realm_result should be truthy and have some values, otherwise
            # the test is kind of meaningless
            assert(orig_realm_result)
            if equal:
                self.assertEqual(orig_realm_result, imported_realm_result)
            else:
                self.assertNotEqual(orig_realm_result, imported_realm_result)

        # test users
        assert_realm_values(
            lambda r: {user.email for user in r.get_admin_users()}
        )

        assert_realm_values(
            lambda r: {user.email for user in r.get_active_users()}
        )

        # test stream
        assert_realm_values(
            lambda r: {stream.name for stream in get_active_streams(r)}
        )

        # test recipients
        def get_recipient_stream(r: Realm) -> Stream:
            return get_stream_recipient(
                Stream.objects.get(name='Verona', realm=r).id
            )

        def get_recipient_user(r: Realm) -> UserProfile:
            return get_personal_recipient(
                UserProfile.objects.get(full_name='Iago', realm=r).id
            )

        assert_realm_values(lambda r: get_recipient_stream(r).type)
        assert_realm_values(lambda r: get_recipient_user(r).type)

        # test subscription
        def get_subscribers(recipient: Recipient) -> Set[str]:
            subscriptions = Subscription.objects.filter(recipient=recipient)
            users = {sub.user_profile.email for sub in subscriptions}
            return users

        assert_realm_values(
            lambda r: get_subscribers(get_recipient_stream(r))
        )

        assert_realm_values(
            lambda r: get_subscribers(get_recipient_user(r))
        )

        # test custom profile fields
        def get_custom_profile_field_names(r: Realm) -> Set[str]:
            custom_profile_fields = CustomProfileField.objects.filter(realm=r)
            custom_profile_field_names = {field.name for field in custom_profile_fields}
            return custom_profile_field_names

        assert_realm_values(get_custom_profile_field_names)

        def get_custom_profile_with_field_type_user(r: Realm) -> Tuple[Set[Any],
                                                                       Set[Any],
                                                                       Set[FrozenSet[str]]]:
            fields = CustomProfileField.objects.filter(
                field_type=CustomProfileField.USER,
                realm=r)

            def get_email(user_id: int) -> str:
                return UserProfile.objects.get(id=user_id).email

            def get_email_from_value(field_value: CustomProfileFieldValue) -> Set[str]:
                user_id_list = ujson.loads(field_value.value)
                return {get_email(user_id) for user_id in user_id_list}

            def custom_profile_field_values_for(fields: List[CustomProfileField]) -> Set[FrozenSet[str]]:
                user_emails = set()  # type: Set[FrozenSet[str]]
                for field in fields:
                    values = CustomProfileFieldValue.objects.filter(field=field)
                    for value in values:
                        user_emails.add(frozenset(get_email_from_value(value)))
                return user_emails

            field_names, field_hints = (set() for i in range(2))
            for field in fields:
                field_names.add(field.name)
                field_hints.add(field.hint)

            return (field_hints, field_names, custom_profile_field_values_for(fields))

        assert_realm_values(get_custom_profile_with_field_type_user)

        # test realmauditlog
        def get_realm_audit_log_event_type(r: Realm) -> Set[str]:
            realmauditlogs = RealmAuditLog.objects.filter(realm=r)
            realmauditlog_event_type = {log.event_type for log in realmauditlogs}
            return realmauditlog_event_type

        assert_realm_values(get_realm_audit_log_event_type)

        # test huddles
        def get_huddle_hashes(r: str) -> str:
            short_names = ['cordelia', 'hamlet', 'othello']
            user_id_list = [UserProfile.objects.get(realm=r, short_name=name).id for name in short_names]
            huddle_hash = get_huddle_hash(user_id_list)
            return huddle_hash

        assert_realm_values(get_huddle_hashes, equal=False)

        def get_huddle_message(r: str) -> str:
            huddle_hash = get_huddle_hashes(r)
            huddle_id = Huddle.objects.get(huddle_hash=huddle_hash).id
            huddle_recipient = Recipient.objects.get(type_id=huddle_id, type=3)
            huddle_message = Message.objects.get(recipient=huddle_recipient)
            return huddle_message.content

        assert_realm_values(get_huddle_message)
        self.assertEqual(get_huddle_message(imported_realm), 'test huddle message')

        # test userhotspot
        def get_user_hotspots(r: str) -> Set[str]:
            user_profile = UserProfile.objects.get(realm=r, short_name='hamlet')
            hotspots = UserHotspot.objects.filter(user=user_profile)
            user_hotspots = {hotspot.hotspot for hotspot in hotspots}
            return user_hotspots

        assert_realm_values(get_user_hotspots)

        # test muted topics
        def get_muted_topics(r: Realm) -> Set[str]:
            user_profile = UserProfile.objects.get(realm=r, short_name='hamlet')
            muted_topics = MutedTopic.objects.filter(user_profile=user_profile)
            topic_names = {muted_topic.topic_name for muted_topic in muted_topics}
            return topic_names

        assert_realm_values(get_muted_topics)

        # test usergroups
        assert_realm_values(
            lambda r: {group.name for group in UserGroup.objects.filter(realm=r)}
        )

        def get_user_membership(r: str) -> Set[str]:
            usergroup = UserGroup.objects.get(realm=r, name='hamletcharacters')
            usergroup_membership = UserGroupMembership.objects.filter(user_group=usergroup)
            users = {membership.user_profile.email for membership in usergroup_membership}
            return users

        assert_realm_values(get_user_membership)

        # test botstoragedata and botconfigdata
        def get_botstoragedata(r: Realm) -> Dict[str, Any]:
            bot_profile = UserProfile.objects.get(full_name="bot", realm=r)
            bot_storage_data = BotStorageData.objects.get(bot_profile=bot_profile)
            return {'key': bot_storage_data.key, 'data': bot_storage_data.value}

        assert_realm_values(get_botstoragedata)

        def get_botconfigdata(r: Realm) -> Dict[str, Any]:
            bot_profile = UserProfile.objects.get(full_name="bot", realm=r)
            bot_config_data = BotConfigData.objects.get(bot_profile=bot_profile)
            return {'key': bot_config_data.key, 'data': bot_config_data.value}

        assert_realm_values(get_botconfigdata)

        # test messages
        def get_stream_messages(r: Realm) -> Message:
            recipient = get_recipient_stream(r)
            messages = Message.objects.filter(recipient=recipient)
            return messages

        def get_stream_topics(r: Realm) -> Set[str]:
            messages = get_stream_messages(r)
            topics = {m.subject for m in messages}
            return topics

        assert_realm_values(get_stream_topics)

        # test usermessages
        def get_usermessages_user(r: Realm) -> Set[Any]:
            messages = get_stream_messages(r).order_by('content')
            usermessage = UserMessage.objects.filter(message=messages[0])
            usermessage_user = {um.user_profile.email for um in usermessage}
            return usermessage_user

        assert_realm_values(get_usermessages_user)

    def test_import_files_from_local(self) -> None:

        realm = Realm.objects.get(string_id='zulip')
        self._setup_export_files()
        self._export_realm(realm)

        with patch('logging.info'):
            do_import_realm('var/test-export', 'test-zulip')
        imported_realm = Realm.objects.get(string_id='test-zulip')

        # Test attachments
        uploaded_file = Attachment.objects.get(realm=imported_realm)
        self.assertEqual(len(b'zulip!'), uploaded_file.size)

        attachment_file_path = os.path.join(settings.LOCAL_UPLOADS_DIR, 'files', uploaded_file.path_id)
        self.assertTrue(os.path.isfile(attachment_file_path))

        # Test emojis
        realm_emoji = RealmEmoji.objects.get(realm=imported_realm)
        emoji_path = RealmEmoji.PATH_ID_TEMPLATE.format(
            realm_id=imported_realm.id,
            emoji_file_name=realm_emoji.file_name,
        )
        emoji_file_path = os.path.join(settings.LOCAL_UPLOADS_DIR, "avatars", emoji_path)
        self.assertTrue(os.path.isfile(emoji_file_path))

        # Test avatars
        user_email = Message.objects.all()[0].sender.email
        user_profile = UserProfile.objects.get(email=user_email, realm=imported_realm)
        avatar_path_id = user_avatar_path(user_profile) + ".original"
        avatar_file_path = os.path.join(settings.LOCAL_UPLOADS_DIR, "avatars", avatar_path_id)
        self.assertTrue(os.path.isfile(avatar_file_path))

    @use_s3_backend
    def test_import_files_from_s3(self) -> None:
        conn = S3Connection(settings.S3_KEY, settings.S3_SECRET_KEY)
        uploads_bucket = conn.create_bucket(settings.S3_AUTH_UPLOADS_BUCKET)
        avatar_bucket = conn.create_bucket(settings.S3_AVATAR_BUCKET)

        realm = Realm.objects.get(string_id='zulip')
        self._setup_export_files()
        self._export_realm(realm)
        with patch('logging.info'):
            do_import_realm('var/test-export', 'test-zulip')
        imported_realm = Realm.objects.get(string_id='test-zulip')
        test_image_data = open(get_test_image_file('img.png').name, 'rb').read()

        # Test attachments
        uploaded_file = Attachment.objects.get(realm=imported_realm)
        self.assertEqual(len(b'zulip!'), uploaded_file.size)

        attachment_content = uploads_bucket.get_key(uploaded_file.path_id).get_contents_as_string()
        self.assertEqual(b"zulip!", attachment_content)

        # Test emojis
        realm_emoji = RealmEmoji.objects.get(realm=imported_realm)
        emoji_path = RealmEmoji.PATH_ID_TEMPLATE.format(
            realm_id=imported_realm.id,
            emoji_file_name=realm_emoji.file_name,
        )
        emoji_key = avatar_bucket.get_key(emoji_path)
        self.assertIsNotNone(emoji_key)
        self.assertEqual(emoji_key.key, emoji_path)

        # Test avatars
        user_email = Message.objects.all()[0].sender.email
        user_profile = UserProfile.objects.get(email=user_email, realm=imported_realm)
        avatar_path_id = user_avatar_path(user_profile) + ".original"
        original_image_key = avatar_bucket.get_key(avatar_path_id)
        self.assertEqual(original_image_key.key, avatar_path_id)
        image_data = original_image_key.get_contents_as_string()
        self.assertEqual(image_data, test_image_data)

    def test_get_incoming_message_ids(self) -> None:
        import_dir = os.path.join(settings.DEPLOY_ROOT, "zerver", "tests", "fixtures", "import_fixtures")
        message_ids = get_incoming_message_ids(
            import_dir=import_dir,
            sort_by_date=True,
        )

        self.assertEqual(message_ids, [888, 999, 555])

        message_ids = get_incoming_message_ids(
            import_dir=import_dir,
            sort_by_date=False,
        )

        self.assertEqual(message_ids, [555, 888, 999])

    def test_plan_type(self) -> None:
        realm = get_realm('zulip')
        realm.plan_type = Realm.PREMIUM
        realm.save(update_fields=['plan_type'])

        self._setup_export_files()
        self._export_realm(realm)

        with patch('logging.info'):
            with self.settings(BILLING_ENABLED=True):
                realm = do_import_realm('var/test-export', 'test-zulip-1')
                self.assertTrue(realm.plan_type, Realm.LIMITED)
            with self.settings(BILLING_ENABLED=False):
                realm = do_import_realm('var/test-export', 'test-zulip-2')
                self.assertTrue(realm.plan_type, Realm.SELF_HOSTED)