import pytest
import time

from helpers.cluster import ClickHouseCluster
from helpers.test_tools import assert_eq_with_retry, exec_query_with_retry

cluster = ClickHouseCluster(__file__)

node1 = cluster.add_instance('node1', with_zookeeper=True, image='yandex/clickhouse-server', tag='20.1.10.70',
                             with_installed_binary=True, stay_alive=True)
node2 = cluster.add_instance('node2', with_zookeeper=True, image='yandex/clickhouse-server', tag='20.1.10.70',
                             with_installed_binary=True, stay_alive=True)
node3 = cluster.add_instance('node3', with_zookeeper=True, image='yandex/clickhouse-server', tag='20.1.10.70',
                             with_installed_binary=True, stay_alive=True)


@pytest.fixture(scope="module")
def start_cluster():
    try:
        cluster.start()

        yield cluster
    finally:
        cluster.shutdown()


def test_mutate_and_upgrade(start_cluster):
    for node in [node1, node2]:
        node.query(
            "CREATE TABLE mt (EventDate Date, id UInt64) ENGINE ReplicatedMergeTree('/clickhouse/tables/t', '{}') ORDER BY tuple()".format(
                node.name))

    node1.query("INSERT INTO mt VALUES ('2020-02-13', 1), ('2020-02-13', 2);")

    node1.query("ALTER TABLE mt DELETE WHERE id = 2", settings={"mutations_sync": "2"})
    node2.query("SYSTEM SYNC REPLICA mt", timeout=5)

    node1.restart_with_latest_version(signal=9)
    node2.restart_with_latest_version(signal=9)

    # After hard restart table can be in readonly mode
    exec_query_with_retry(node2, "INSERT INTO mt VALUES ('2020-02-13', 3)")
    exec_query_with_retry(node1, "SYSTEM SYNC REPLICA mt")

    assert node1.query("SELECT COUNT() FROM mt") == "2\n"
    assert node2.query("SELECT COUNT() FROM mt") == "2\n"

    node1.query("INSERT INTO mt VALUES ('2020-02-13', 4);")

    node2.query("SYSTEM SYNC REPLICA mt", timeout=5)

    assert node1.query("SELECT COUNT() FROM mt") == "3\n"
    assert node2.query("SELECT COUNT() FROM mt") == "3\n"

    node2.query("ALTER TABLE mt DELETE WHERE id = 3", settings={"mutations_sync": "2"})

    node1.query("SYSTEM SYNC REPLICA mt", timeout=5)

    assert node1.query("SELECT COUNT() FROM mt") == "2\n"
    assert node2.query("SELECT COUNT() FROM mt") == "2\n"

    node1.query("ALTER TABLE mt MODIFY COLUMN id Int32 DEFAULT 0",
                settings={"replication_alter_partitions_sync": "2"})

    node2.query("OPTIMIZE TABLE mt FINAL")

    assert node1.query("SELECT id FROM mt") == "1\n4\n"
    assert node2.query("SELECT id FROM mt") == "1\n4\n"


def test_upgrade_while_mutation(start_cluster):
    node3.query(
        "CREATE TABLE mt1 (EventDate Date, id UInt64) ENGINE ReplicatedMergeTree('/clickhouse/tables/t1', 'node3') ORDER BY tuple()")

    node3.query("INSERT INTO mt1 select '2020-02-13', number from numbers(100000)")

    node3.query("SYSTEM STOP MERGES mt1")
    node3.query("ALTER TABLE mt1 DELETE WHERE id % 2 == 0")

    node3.restart_with_latest_version(signal=9)

    exec_query_with_retry(node3, "ALTER TABLE mt1 DELETE WHERE id > 100000", settings={"mutations_sync": "2"})
    # will delete nothing, but previous async mutation will finish with this query

    assert_eq_with_retry(node3, "SELECT COUNT() from mt1", "50000\n")