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import base64
import io
import mock
import os
import zipfile

from fakeredis import FakeStrictRedis
from redis import StrictRedis
from resultsdbpy.controller.configuration import Configuration
from resultsdbpy.model.cassandra_context import CassandraContext
from resultsdbpy.model.mock_cassandra_context import MockCassandraContext
from resultsdbpy.model.mock_model_factory import MockModelFactory
from resultsdbpy.model.mock_repository import MockSVNRepository
from resultsdbpy.model.wait_for_docker_test_case import WaitForDockerTestCase


class ArchiveContextTest(WaitForDockerTestCase):
    KEYSPACE = 'archive_test_keyspace'

    def init_database(self, redis=StrictRedis, cassandra=CassandraContext, configuration=Configuration(), archive=None):
        cassandra.drop_keyspace(keyspace=self.KEYSPACE)
        self.model = MockModelFactory.create(redis=redis(), cassandra=cassandra(keyspace=self.KEYSPACE, create_keyspace=True))
        MockModelFactory.add_mock_archives(self.model, configuration=configuration, archive=archive)

    @WaitForDockerTestCase.mock_if_no_docker(mock_redis=FakeStrictRedis, mock_cassandra=MockCassandraContext)
    def test_find_archive(self, redis=StrictRedis, cassandra=CassandraContext):
        self.init_database(redis=redis, cassandra=cassandra)
        archives = self.model.archive_context.find_archive(
            configurations=[Configuration(platform='Mac', style='Release', flavor='wk1')],
            begin=MockSVNRepository.webkit().commit_for_id(236542), end=MockSVNRepository.webkit().commit_for_id(236542),
            suite='layout-tests',
        )
        self.assertEqual(len(next(iter(archives.values()))), 1)
        self.assertEqual(next(iter(archives.values()))[0]['uuid'], 153804910800)
        self.assertEqual(next(iter(archives.values()))[0]['archive'].getvalue(), base64.b64decode(MockModelFactory.ARCHIVE_ZIP))

    @WaitForDockerTestCase.mock_if_no_docker(mock_redis=FakeStrictRedis, mock_cassandra=MockCassandraContext)
    def test_archive_list(self, redis=StrictRedis, cassandra=CassandraContext):
        self.init_database(redis=redis, cassandra=cassandra)
        files = self.model.archive_context.ls(
            configurations=[Configuration(platform='Mac', style='Release', flavor='wk1')],
            begin=MockSVNRepository.webkit().commit_for_id(236542), end=MockSVNRepository.webkit().commit_for_id(236542),
            suite='layout-tests',
        )
        self.assertEqual(len(next(iter(files.values()))), 1)
        self.assertEqual(next(iter(files.values()))[0]['uuid'], 153804910800)
        self.assertEqual(next(iter(files.values()))[0]['files'], ['file.txt', 'index.html'])

    @WaitForDockerTestCase.mock_if_no_docker(mock_redis=FakeStrictRedis, mock_cassandra=MockCassandraContext)
    def test_file_access(self, redis=StrictRedis, cassandra=CassandraContext):
        self.init_database(redis=redis, cassandra=cassandra)
        files = self.model.archive_context.file(
            path='file.txt',
            configurations=[Configuration(platform='Mac', style='Release', flavor='wk1')],
            begin=MockSVNRepository.webkit().commit_for_id(236542), end=MockSVNRepository.webkit().commit_for_id(236542),
            suite='layout-tests',
        )
        self.assertEqual(len(next(iter(files.values()))), 1)
        self.assertEqual(next(iter(files.values()))[0]['uuid'], 153804910800)
        self.assertEqual(next(iter(files.values()))[0]['file'], 'data'.encode('ascii'))

    @WaitForDockerTestCase.mock_if_no_docker(mock_redis=FakeStrictRedis, mock_cassandra=MockCassandraContext)
    def test_file_list(self, redis=StrictRedis, cassandra=CassandraContext):
        self.init_database(redis=redis, cassandra=cassandra)
        files = self.model.archive_context.file(
            configurations=[Configuration(platform='Mac', style='Release', flavor='wk1')],
            begin=MockSVNRepository.webkit().commit_for_id(236542), end=MockSVNRepository.webkit().commit_for_id(236542),
            suite='layout-tests',
        )
        self.assertEqual(len(next(iter(files.values()))), 1)
        self.assertEqual(next(iter(files.values()))[0]['uuid'], 153804910800)
        self.assertEqual(next(iter(files.values()))[0]['file'], ['file.txt', 'index.html'])

    @WaitForDockerTestCase.mock_if_no_docker(mock_redis=FakeStrictRedis, mock_cassandra=MockCassandraContext)
    def test_large_archive(self, redis=StrictRedis, cassandra=CassandraContext):
        FILE_SIZE = 25 * 1024 * 1024  # 25 MB files
        buff = io.BytesIO()
        with zipfile.ZipFile(buff, 'a', zipfile.ZIP_DEFLATED, False) as archive:
            for file, data in [
                ('file-1.txt', io.BytesIO(os.urandom(FILE_SIZE))),
                ('file-2.txt', io.BytesIO(os.urandom(FILE_SIZE))),
                ('file-3.txt', io.BytesIO(os.urandom(FILE_SIZE))),
            ]:
                archive.writestr(file, data.getvalue())

        self.init_database(
            redis=redis, cassandra=cassandra,
            configuration=Configuration(platform='Mac', style='Release', flavor='wk1'),
            archive=buff,
        )

        files = self.model.archive_context.find_archive(
            configurations=[Configuration(platform='Mac', style='Release', flavor='wk1')],
            begin=MockSVNRepository.webkit().commit_for_id(236542), end=MockSVNRepository.webkit().commit_for_id(236542),
            suite='layout-tests',
        )
        self.assertEqual(len(next(iter(files.values()))), 1)
        self.assertEqual(next(iter(files.values()))[0]['uuid'], 153804910800)
        self.assertEqual(next(iter(files.values()))[0]['archive'].getvalue(), buff.getvalue())

        with mock.patch('resultsdbpy.model.archive_context.ArchiveContext.MEMORY_LIMIT', new=FILE_SIZE), self.assertRaises(RuntimeError):
            self.model.archive_context.find_archive(
                configurations=[Configuration(platform='Mac', style='Release', flavor='wk1')],
                begin=MockSVNRepository.webkit().commit_for_id(236542), end=MockSVNRepository.webkit().commit_for_id(236542),
                suite='layout-tests',
            )