import os.path
import time

import pytest
from helpers.cluster import ClickHouseCluster
from helpers.test_tools import TSV

cluster = ClickHouseCluster(__file__)

NODES = {'node' + str(i): None for i in (1, 2)}

config = '''<yandex>
    <profiles>
        <default>
            <sleep_in_send_data>{sleep_in_send_data}</sleep_in_send_data>
        </default>
    </profiles>
</yandex>'''


@pytest.fixture(scope="module")
def started_cluster():
    cluster.__with_ssl_config = True
    main_configs = [
        "configs_secure/config.d/remote_servers.xml",
        "configs_secure/server.crt",
        "configs_secure/server.key",
        "configs_secure/dhparam.pem",
        "configs_secure/config.d/ssl_conf.xml",
    ]

    NODES['node1'] =  cluster.add_instance('node1', main_configs=main_configs)
    NODES['node2'] =  cluster.add_instance('node2', main_configs=main_configs, user_configs=["configs_secure/users.d/users.xml"])

    try:
        cluster.start()
        NODES['node2'].query("CREATE TABLE base_table (x UInt64) ENGINE = MergeTree  ORDER BY x;")
        NODES['node2'].query("INSERT INTO base_table VALUES (5);")
        NODES['node1'].query("CREATE TABLE distributed_table (x UInt64) ENGINE = Distributed(test_cluster, default, base_table);")

        yield cluster

    finally:
        cluster.shutdown()


def test(started_cluster):
    NODES['node2'].replace_config('/etc/clickhouse-server/users.d/users.xml', config.format(sleep_in_send_data=1000))
    
    attempts = 0
    while attempts < 1000:
        setting = NODES['node2'].http_query("SELECT value FROM system.settings WHERE name='sleep_in_send_data'")
        if int(setting) == 1000:
            break
        time.sleep(0.1)
        attempts += 1

    assert attempts < 1000


    start = time.time()
    NODES['node1'].query_and_get_error('SELECT * FROM distributed_table settings receive_timeout=5, use_hedged_requests=0, async_socket_for_remote=0;')
    end = time.time()
    assert end - start < 10

    start = time.time()
    error = NODES['node1'].query_and_get_error('SELECT * FROM distributed_table settings receive_timeout=5, use_hedged_requests=0;')
    end = time.time()

    assert end - start < 10

    # Check that exception about timeout wasn't thrown from DB::ReadBufferFromPocoSocket::nextImpl().
    assert error.find('DB::ReadBufferFromPocoSocket::nextImpl()') == -1

    start = time.time()
    error = NODES['node1'].query_and_get_error('SELECT * FROM distributed_table settings receive_timeout=5;')
    end = time.time()

    assert end - start < 10

    # Check that exception about timeout wasn't thrown from DB::ReadBufferFromPocoSocket::nextImpl().
    assert error.find('DB::ReadBufferFromPocoSocket::nextImpl()') == -1