import pytest

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

cluster = ClickHouseCluster(__file__)

node1 = cluster.add_instance('node1', main_configs=['configs/remote_servers.xml'],
                             user_configs=['configs/user_good_restricted.xml'], with_zookeeper=True)
node2 = cluster.add_instance('node2', main_configs=['configs/remote_servers.xml'],
                             user_configs=['configs/user_good_restricted.xml'], with_zookeeper=True)
node3 = cluster.add_instance('node3', main_configs=['configs/remote_servers.xml'],
                             user_configs=['configs/user_good_allowed.xml'], with_zookeeper=True)
node4 = cluster.add_instance('node4', main_configs=['configs/remote_servers.xml'],
                             user_configs=['configs/user_good_allowed.xml'], with_zookeeper=True)


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

        for node in [node1, node2]:
            node.query('''
            CREATE TABLE sometable(date Date, id UInt32, value Int32)
    ENGINE = ReplicatedMergeTree('/clickhouse/tables/0/sometable', '{replica}', date, id, 8192);
                '''.format(replica=node.name), user='awesome')

        for node in [node3, node4]:
            node.query('''
            CREATE TABLE someothertable(date Date, id UInt32, value Int32)
    ENGINE = ReplicatedMergeTree('/clickhouse/tables/0/someothertable', '{replica}', date, id, 8192);
                '''.format(replica=node.name), user='good')

        yield cluster

    finally:
        cluster.shutdown()


@pytest.mark.parametrize("table,query,expected,n1,n2", [
    ("sometable", "ALTER TABLE sometable DROP PARTITION 201706", '1', node1, node2),
    ("sometable", "TRUNCATE TABLE sometable", '0', node1, node2),
    ("sometable", "OPTIMIZE TABLE sometable", '4', node1, node2),
    ("someothertable", "ALTER TABLE someothertable DROP PARTITION 201706", '1', node3, node4),
    ("someothertable", "TRUNCATE TABLE someothertable", '0', node3, node4),
    ("someothertable", "OPTIMIZE TABLE someothertable", '4', node3, node4),
])
def test_alter_table_drop_partition(started_cluster, table, query, expected, n1, n2):
    to_insert = '''\
2017-06-16	111	0
2017-06-16	222	1
2017-06-16	333	2
2017-07-16	444	3
'''
    n1.query("INSERT INTO {} FORMAT TSV".format(table), stdin=to_insert, user='good')

    assert_eq_with_retry(n1, "SELECT COUNT(*) from {}".format(table), '4', user='good')
    assert_eq_with_retry(n2, "SELECT COUNT(*) from {}".format(table), '4', user='good')

    ### It maybe leader and everything will be ok
    n1.query(query, user='good')

    assert_eq_with_retry(n1, "SELECT COUNT(*) from {}".format(table), expected, user='good')
    assert_eq_with_retry(n2, "SELECT COUNT(*) from {}".format(table), expected, user='good')

    n1.query("INSERT INTO {} FORMAT TSV".format(table), stdin=to_insert, user='good')

    assert_eq_with_retry(n1, "SELECT COUNT(*) from {}".format(table), '4', user='good')
    assert_eq_with_retry(n2, "SELECT COUNT(*) from {}".format(table), '4', user='good')

    ### If node1 is leader than node2 will be slave
    n2.query(query, user='good')

    assert_eq_with_retry(n1, "SELECT COUNT(*) from {}".format(table), expected, user='good')
    assert_eq_with_retry(n2, "SELECT COUNT(*) from {}".format(table), expected, user='good')