# -*- coding: utf-8 -*-
#
# Copyright 2021 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import os
import time

from google.cloud.spanner_v1 import Client
from google.cloud.spanner_v1.instance import Instance


USE_EMULATOR = os.getenv("SPANNER_EMULATOR_HOST") is not None

PROJECT = os.getenv(
    "GOOGLE_CLOUD_PROJECT", os.getenv("PROJECT_ID", "emulator-test-project"),
)
CLIENT = None

if USE_EMULATOR:
    from google.auth.credentials import AnonymousCredentials
    CLIENT = Client(
        project=PROJECT, credentials=AnonymousCredentials()
    )
else:
    CLIENT = Client(project=PROJECT)


def reap_old_instances():
    # Delete test instances that are older than four hours.
    cutoff = int(time.time()) - 4 * 60 * 60
    instances_pbs = CLIENT.list_instances("labels.python-spanner-sqlalchemy-systest:true")
    for instance_pb in instances_pbs:
        instance = Instance.from_pb(instance_pb, CLIENT)
        if "created" not in instance.labels:
            continue
        create_time = int(instance.labels["created"])
        if create_time > cutoff:
            continue
        # Backups are not used in sqlalchemy dialect test, therefore instance can just be deleted.
        instance.delete()


def prep_instance():
    configs = list(CLIENT.list_instance_configs())
    # Filter out non "us" locations
    configs = [config for config in configs if "-us-" in config.name]

    instance_config = configs[0].name
    create_time = str(int(time.time()))
    unique_resource_id = '%s%d' % ('-', 1000 * time.time())
    instance_id = "sqlalchemy-test" + unique_resource_id
    labels = {"python-spanner-sqlalchemy-systest": "true", "created": create_time}

    instance = CLIENT.instance(instance_id, instance_config, labels=labels)

    created_op = instance.create()
    created_op.result(120)  # block until completion

    database = instance.database("compliance-test")
    created_op = database.create()
    created_op.result(120)

reap_old_instances()
prep_instance()