import time

import helpers.client as client
import pytest
from helpers.cluster import ClickHouseCluster
from helpers.test_tools import TSV, exec_query_with_retry
from helpers.wait_for_helpers import wait_for_delete_inactive_parts
from helpers.wait_for_helpers import wait_for_delete_empty_parts

cluster = ClickHouseCluster(__file__)
node1 = cluster.add_instance("node1", with_zookeeper=True)
node2 = cluster.add_instance("node2", with_zookeeper=True)

node3 = cluster.add_instance("node3", with_zookeeper=True)
node4 = cluster.add_instance(
    "node4",
    with_zookeeper=True,
    image="yandex/clickhouse-server",
    tag="20.12.4.5",
    stay_alive=True,
    with_installed_binary=True,
)

node5 = cluster.add_instance(
    "node5",
    with_zookeeper=True,
    image="yandex/clickhouse-server",
    tag="20.12.4.5",
    stay_alive=True,
    with_installed_binary=True,
)
node6 = cluster.add_instance(
    "node6",
    with_zookeeper=True,
    image="yandex/clickhouse-server",
    tag="20.12.4.5",
    stay_alive=True,
    with_installed_binary=True,
)


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

        yield cluster

    except Exception as ex:
        print(ex)

    finally:
        cluster.shutdown()


def drop_table(nodes, table_name):
    for node in nodes:
        node.query("DROP TABLE IF EXISTS {} SYNC".format(table_name))


# Column TTL works only with wide parts, because it's very expensive to apply it for compact parts
def test_ttl_columns(started_cluster):
    drop_table([node1, node2], "test_ttl")
    for node in [node1, node2]:
        node.query(
            """
                CREATE TABLE test_ttl(date DateTime, id UInt32, a Int32 TTL date + INTERVAL 1 DAY, b Int32 TTL date + INTERVAL 1 MONTH)
                ENGINE = ReplicatedMergeTree('/clickhouse/tables/test/test_ttl_columns', '{replica}')
                ORDER BY id PARTITION BY toDayOfMonth(date) SETTINGS merge_with_ttl_timeout=0, min_bytes_for_wide_part=0;
            """.format(
                replica=node.name
            )
        )

    node1.query(
        "INSERT INTO test_ttl VALUES (toDateTime('2000-10-10 00:00:00'), 1, 1, 3)"
    )
    node1.query(
        "INSERT INTO test_ttl VALUES (toDateTime('2000-10-11 10:00:00'), 2, 2, 4)"
    )
    time.sleep(1)  # sleep to allow use ttl merge selector for second time
    node1.query("OPTIMIZE TABLE test_ttl FINAL")

    expected = "1\t0\t0\n2\t0\t0\n"
    assert TSV(node1.query("SELECT id, a, b FROM test_ttl ORDER BY id")) == TSV(
        expected
    )
    assert TSV(node2.query("SELECT id, a, b FROM test_ttl ORDER BY id")) == TSV(
        expected
    )


def test_merge_with_ttl_timeout(started_cluster):
    table = "test_merge_with_ttl_timeout"
    drop_table([node1, node2], table)
    for node in [node1, node2]:
        node.query(
            """
                CREATE TABLE {table}(date DateTime, id UInt32, a Int32 TTL date + INTERVAL 1 DAY, b Int32 TTL date + INTERVAL 1 MONTH)
                ENGINE = ReplicatedMergeTree('/clickhouse/tables/test/{table}', '{replica}')
                ORDER BY id PARTITION BY toDayOfMonth(date)
                SETTINGS min_bytes_for_wide_part=0;
            """.format(
                replica=node.name, table=table
            )
        )

    node1.query("SYSTEM STOP TTL MERGES {table}".format(table=table))
    node2.query("SYSTEM STOP TTL MERGES {table}".format(table=table))

    for i in range(1, 4):
        node1.query(
            "INSERT INTO {table} VALUES (toDateTime('2000-10-{day:02d} 10:00:00'), 1, 2, 3)".format(
                day=i, table=table
            )
        )

    assert (
        node1.query("SELECT countIf(a = 0) FROM {table}".format(table=table)) == "0\n"
    )
    assert (
        node2.query("SELECT countIf(a = 0) FROM {table}".format(table=table)) == "0\n"
    )

    node1.query("SYSTEM START TTL MERGES {table}".format(table=table))
    node2.query("SYSTEM START TTL MERGES {table}".format(table=table))

    time.sleep(15)  # TTL merges shall happen.

    for i in range(1, 4):
        node1.query(
            "INSERT INTO {table} VALUES (toDateTime('2000-10-{day:02d} 10:00:00'), 1, 2, 3)".format(
                day=i, table=table
            )
        )

    time.sleep(15)  # TTL merges shall not happen.

    assert (
        node1.query("SELECT countIf(a = 0) FROM {table}".format(table=table)) == "3\n"
    )
    assert (
        node2.query("SELECT countIf(a = 0) FROM {table}".format(table=table)) == "3\n"
    )


def test_ttl_many_columns(started_cluster):
    drop_table([node1, node2], "test_ttl_2")
    for node in [node1, node2]:
        node.query(
            """
                CREATE TABLE test_ttl_2(date DateTime, id UInt32,
                    a Int32 TTL date,
                    _idx Int32 TTL date,
                    _offset Int32 TTL date,
                    _partition Int32 TTL date)
                ENGINE = ReplicatedMergeTree('/clickhouse/tables/test/test_ttl_2', '{replica}')
                ORDER BY id PARTITION BY toDayOfMonth(date) SETTINGS merge_with_ttl_timeout=0;
            """.format(
                replica=node.name
            )
        )

    node1.query("SYSTEM STOP TTL MERGES test_ttl_2")
    node2.query("SYSTEM STOP TTL MERGES test_ttl_2")

    node1.query(
        "INSERT INTO test_ttl_2 VALUES (toDateTime('2000-10-10 00:00:00'), 1, 2, 3, 4, 5)"
    )
    node1.query(
        "INSERT INTO test_ttl_2 VALUES (toDateTime('2100-10-10 10:00:00'), 6, 7, 8, 9, 10)"
    )

    node2.query("SYSTEM SYNC REPLICA test_ttl_2", timeout=5)

    # Check that part will appear in result of merge
    node1.query("SYSTEM STOP FETCHES test_ttl_2")
    node2.query("SYSTEM STOP FETCHES test_ttl_2")

    node1.query("SYSTEM START TTL MERGES test_ttl_2")
    node2.query("SYSTEM START TTL MERGES test_ttl_2")

    time.sleep(1)  # sleep to allow use ttl merge selector for second time
    node1.query("OPTIMIZE TABLE test_ttl_2 FINAL", timeout=5)

    node2.query("SYSTEM SYNC REPLICA test_ttl_2", timeout=5)

    expected = "1\t0\t0\t0\t0\n6\t7\t8\t9\t10\n"
    assert TSV(
        node1.query(
            "SELECT id, a, _idx, _offset, _partition FROM test_ttl_2 ORDER BY id"
        )
    ) == TSV(expected)
    assert TSV(
        node2.query(
            "SELECT id, a, _idx, _offset, _partition FROM test_ttl_2 ORDER BY id"
        )
    ) == TSV(expected)


@pytest.mark.parametrize(
    "delete_suffix",
    [
        "",
        "DELETE",
    ],
)
def test_ttl_table(started_cluster, delete_suffix):
    drop_table([node1, node2], "test_ttl")
    for node in [node1, node2]:
        node.query(
            """
                CREATE TABLE test_ttl(date DateTime, id UInt32)
                ENGINE = ReplicatedMergeTree('/clickhouse/tables/test/test_ttl', '{replica}')
                ORDER BY id PARTITION BY toDayOfMonth(date)
                TTL date + INTERVAL 1 DAY {delete_suffix} SETTINGS merge_with_ttl_timeout=0;
            """.format(
                replica=node.name, delete_suffix=delete_suffix
            )
        )

    node1.query("INSERT INTO test_ttl VALUES (toDateTime('2000-10-10 00:00:00'), 1)")
    node1.query("INSERT INTO test_ttl VALUES (toDateTime('2000-10-11 10:00:00'), 2)")
    time.sleep(1)  # sleep to allow use ttl merge selector for second time
    node1.query("OPTIMIZE TABLE test_ttl FINAL")

    assert TSV(node1.query("SELECT * FROM test_ttl")) == TSV("")
    assert TSV(node2.query("SELECT * FROM test_ttl")) == TSV("")


def test_modify_ttl(started_cluster):
    drop_table([node1, node2], "test_ttl")
    for node in [node1, node2]:
        node.query(
            """
                CREATE TABLE test_ttl(d DateTime, id UInt32)
                ENGINE = ReplicatedMergeTree('/clickhouse/tables/test/test_ttl_modify', '{replica}')
                ORDER BY id
            """.format(
                replica=node.name
            )
        )

    node1.query(
        "INSERT INTO test_ttl VALUES (now() - INTERVAL 5 HOUR, 1), (now() - INTERVAL 3 HOUR, 2), (now() - INTERVAL 1 HOUR, 3)"
    )
    node2.query("SYSTEM SYNC REPLICA test_ttl", timeout=20)

    node1.query(
        "ALTER TABLE test_ttl MODIFY TTL d + INTERVAL 4 HOUR SETTINGS replication_alter_partitions_sync = 2"
    )
    assert node2.query("SELECT id FROM test_ttl") == "2\n3\n"

    node2.query(
        "ALTER TABLE test_ttl MODIFY TTL d + INTERVAL 2 HOUR SETTINGS replication_alter_partitions_sync = 2"
    )
    assert node1.query("SELECT id FROM test_ttl") == "3\n"

    node1.query(
        "ALTER TABLE test_ttl MODIFY TTL d + INTERVAL 30 MINUTE SETTINGS replication_alter_partitions_sync = 2"
    )
    assert node2.query("SELECT id FROM test_ttl") == ""


def test_modify_column_ttl(started_cluster):
    drop_table([node1, node2], "test_ttl")
    for node in [node1, node2]:
        node.query(
            """
                CREATE TABLE test_ttl(d DateTime, id UInt32 DEFAULT 42)
                ENGINE = ReplicatedMergeTree('/clickhouse/tables/test/test_ttl_column', '{replica}')
                ORDER BY d
            """.format(
                replica=node.name
            )
        )

    node1.query(
        "INSERT INTO test_ttl VALUES (now() - INTERVAL 5 HOUR, 1), (now() - INTERVAL 3 HOUR, 2), (now() - INTERVAL 1 HOUR, 3)"
    )
    node2.query("SYSTEM SYNC REPLICA test_ttl", timeout=20)

    node1.query(
        "ALTER TABLE test_ttl MODIFY COLUMN id UInt32 TTL d + INTERVAL 4 HOUR SETTINGS replication_alter_partitions_sync = 2"
    )
    assert node2.query("SELECT id FROM test_ttl") == "42\n2\n3\n"

    node1.query(
        "ALTER TABLE test_ttl MODIFY COLUMN id UInt32 TTL d + INTERVAL 2 HOUR SETTINGS replication_alter_partitions_sync = 2"
    )
    assert node1.query("SELECT id FROM test_ttl") == "42\n42\n3\n"

    node1.query(
        "ALTER TABLE test_ttl MODIFY COLUMN id UInt32 TTL d + INTERVAL 30 MINUTE SETTINGS replication_alter_partitions_sync = 2"
    )
    assert node2.query("SELECT id FROM test_ttl") == "42\n42\n42\n"


def test_ttl_double_delete_rule_returns_error(started_cluster):
    drop_table([node1, node2], "test_ttl")
    try:
        node1.query(
            """
            CREATE TABLE test_ttl(date DateTime, id UInt32)
            ENGINE = ReplicatedMergeTree('/clickhouse/tables/test/test_ttl_double_delete', '{replica}')
            ORDER BY id PARTITION BY toDayOfMonth(date)
            TTL date + INTERVAL 1 DAY, date + INTERVAL 2 DAY SETTINGS merge_with_ttl_timeout=0
        """.format(
                replica=node1.name
            )
        )
        assert False
    except client.QueryRuntimeException:
        pass
    except:
        assert False


def optimize_with_retry(node, table_name, retry=20):
    for i in range(retry):
        try:
            node.query(
                "OPTIMIZE TABLE {name} FINAL SETTINGS optimize_throw_if_noop = 1".format(
                    name=table_name
                ),
                settings={"optimize_throw_if_noop": "1"},
            )
            break
        except e:
            time.sleep(0.5)


@pytest.mark.parametrize(
    "name,engine",
    [
        pytest.param(
            "test_ttl_alter_delete", "MergeTree()", id="test_ttl_alter_delete"
        ),
        pytest.param(
            "test_replicated_ttl_alter_delete",
            "ReplicatedMergeTree('/clickhouse/test_replicated_ttl_alter_delete', '1')",
            id="test_ttl_alter_delete_replicated",
        ),
    ],
)
def test_ttl_alter_delete(started_cluster, name, engine):
    """Check compatibility with old TTL delete expressions to make sure
    that:
    * alter modify of column's TTL delete expression works
    * alter to add new columns works
    * alter modify to add TTL delete expression to a a new column works
    for a table that has TTL delete expression defined but
    no explicit storage policy assigned.
    """
    drop_table([node1], name)

    node1.query(
        """
            CREATE TABLE {name} (
                s1 String,
                d1 DateTime
            ) ENGINE = {engine}
            ORDER BY tuple()
            TTL d1 + INTERVAL 1 DAY DELETE
            SETTINGS min_bytes_for_wide_part=0
        """.format(
            name=name, engine=engine
        )
    )

    node1.query(
        """ALTER TABLE {name} MODIFY COLUMN s1 String TTL d1 + INTERVAL 1 SECOND""".format(
            name=name
        )
    )
    node1.query("""ALTER TABLE {name} ADD COLUMN b1 Int32""".format(name=name))

    node1.query(
        """INSERT INTO {name} (s1, b1, d1) VALUES ('hello1', 1, toDateTime({time}))""".format(
            name=name, time=time.time()
        )
    )
    node1.query(
        """INSERT INTO {name} (s1, b1, d1) VALUES ('hello2', 2, toDateTime({time}))""".format(
            name=name, time=time.time() + 360
        )
    )

    time.sleep(1)

    optimize_with_retry(node1, name)
    r = node1.query(
        "SELECT s1, b1 FROM {name} ORDER BY b1, s1".format(name=name)
    ).splitlines()
    assert r == ["\t1", "hello2\t2"]

    node1.query(
        """ALTER TABLE {name} MODIFY COLUMN b1 Int32 TTL d1""".format(name=name)
    )
    node1.query(
        """INSERT INTO {name} (s1, b1, d1) VALUES ('hello3', 3, toDateTime({time}))""".format(
            name=name, time=time.time()
        )
    )

    time.sleep(1)

    optimize_with_retry(node1, name)

    r = node1.query(
        "SELECT s1, b1 FROM {name} ORDER BY b1, s1".format(name=name)
    ).splitlines()
    assert r == ["\t0", "\t0", "hello2\t2"]


def test_ttl_empty_parts(started_cluster):
    drop_table([node1, node2], "test_ttl_empty_parts")
    for node in [node1, node2]:
        node.query(
            """
            CREATE TABLE test_ttl_empty_parts(date Date, id UInt32)
            ENGINE = ReplicatedMergeTree('/clickhouse/tables/test/test_ttl_empty_parts', '{replica}')
            ORDER BY id
            SETTINGS max_bytes_to_merge_at_min_space_in_pool = 1, max_bytes_to_merge_at_max_space_in_pool = 1,
                cleanup_delay_period = 1, cleanup_delay_period_random_add = 0, old_parts_lifetime = 1

        """.format(
                replica=node.name
            )
        )

    for i in range(1, 7):
        node1.query(
            "INSERT INTO test_ttl_empty_parts SELECT '2{}00-01-0{}', number FROM numbers(1000)".format(
                i % 2, i
            )
        )

    assert node1.query("SELECT count() FROM test_ttl_empty_parts") == "6000\n"
    assert (
        node1.query(
            "SELECT name FROM system.parts WHERE table = 'test_ttl_empty_parts' AND active ORDER BY name"
        )
        == "all_0_0_0\nall_1_1_0\nall_2_2_0\nall_3_3_0\nall_4_4_0\nall_5_5_0\n"
    )

    node1.query("ALTER TABLE test_ttl_empty_parts MODIFY TTL date")

    assert node1.query("SELECT count() FROM test_ttl_empty_parts") == "3000\n"

    # Wait for cleanup thread
    wait_for_delete_empty_parts(node1, "test_ttl_empty_parts")
    wait_for_delete_inactive_parts(node1, "test_ttl_empty_parts")

    assert (
        node1.query(
            "SELECT name FROM system.parts WHERE table = 'test_ttl_empty_parts' AND active ORDER BY name"
        )
        == "all_0_0_0_6\nall_2_2_0_6\nall_4_4_0_6\n"
    )

    for node in [node1, node2]:
        node.query(
            "ALTER TABLE test_ttl_empty_parts MODIFY SETTING max_bytes_to_merge_at_min_space_in_pool = 1000000000"
        )
        node.query(
            "ALTER TABLE test_ttl_empty_parts MODIFY SETTING max_bytes_to_merge_at_max_space_in_pool = 1000000000"
        )

    optimize_with_retry(node1, "test_ttl_empty_parts")
    assert (
        node1.query(
            "SELECT name FROM system.parts WHERE table = 'test_ttl_empty_parts' AND active ORDER BY name"
        )
        == "all_0_4_1_6\n"
    )

    # Check that after removing empty parts mutations and merges works
    node1.query(
        "INSERT INTO test_ttl_empty_parts SELECT '2100-01-20', number FROM numbers(1000)"
    )
    node1.query(
        "ALTER TABLE test_ttl_empty_parts DELETE WHERE id % 2 = 0 SETTINGS mutations_sync = 2"
    )
    assert node1.query("SELECT count() FROM test_ttl_empty_parts") == "2000\n"

    optimize_with_retry(node1, "test_ttl_empty_parts")
    assert (
        node1.query(
            "SELECT name FROM system.parts WHERE table = 'test_ttl_empty_parts' AND active ORDER BY name"
        )
        == "all_0_7_2_8\n"
    )

    node2.query("SYSTEM SYNC REPLICA test_ttl_empty_parts", timeout=20)

    error_msg = (
        "<Error> default.test_ttl_empty_parts (ReplicatedMergeTreeCleanupThread)"
    )
    assert not node1.contains_in_log(error_msg)
    assert not node2.contains_in_log(error_msg)


@pytest.mark.parametrize(
    ("node_left", "node_right", "num_run"),
    [(node1, node2, 0), (node3, node4, 1), (node5, node6, 2)],
)
def test_ttl_compatibility(started_cluster, node_left, node_right, num_run):
    drop_table([node_left, node_right], "test_ttl_delete")
    drop_table([node_left, node_right], "test_ttl_group_by")
    drop_table([node_left, node_right], "test_ttl_where")

    for node in [node_left, node_right]:
        node.query(
            """
                CREATE TABLE test_ttl_delete(date DateTime, id UInt32)
                ENGINE = ReplicatedMergeTree('/clickhouse/tables/test/test_ttl_delete_{suff}', '{replica}')
                ORDER BY id PARTITION BY toDayOfMonth(date)
                TTL date + INTERVAL 3 SECOND
                SETTINGS max_number_of_merges_with_ttl_in_pool=100, max_replicated_merges_with_ttl_in_queue=100, remove_empty_parts=0
            """.format(
                suff=num_run, replica=node.name
            )
        )

        node.query(
            """
                CREATE TABLE test_ttl_group_by(date DateTime, id UInt32, val UInt64)
                ENGINE = ReplicatedMergeTree('/clickhouse/tables/test/test_ttl_group_by_{suff}', '{replica}')
                ORDER BY id PARTITION BY toDayOfMonth(date)
                TTL date + INTERVAL 3 SECOND GROUP BY id SET val = sum(val)
                SETTINGS max_number_of_merges_with_ttl_in_pool=100, max_replicated_merges_with_ttl_in_queue=100, remove_empty_parts=0
            """.format(
                suff=num_run, replica=node.name
            )
        )

        node.query(
            """
                CREATE TABLE test_ttl_where(date DateTime, id UInt32)
                ENGINE = ReplicatedMergeTree('/clickhouse/tables/test/test_ttl_where_{suff}', '{replica}')
                ORDER BY id PARTITION BY toDayOfMonth(date)
                TTL date + INTERVAL 3 SECOND DELETE WHERE id % 2 = 1
                SETTINGS max_number_of_merges_with_ttl_in_pool=100, max_replicated_merges_with_ttl_in_queue=100, remove_empty_parts=0
            """.format(
                suff=num_run, replica=node.name
            )
        )

    node_left.query("INSERT INTO test_ttl_delete VALUES (now(), 1)")
    node_left.query(
        "INSERT INTO test_ttl_delete VALUES (toDateTime('2100-10-11 10:00:00'), 2)"
    )
    node_right.query("INSERT INTO test_ttl_delete VALUES (now(), 3)")
    node_right.query(
        "INSERT INTO test_ttl_delete VALUES (toDateTime('2100-10-11 10:00:00'), 4)"
    )

    node_left.query("INSERT INTO test_ttl_group_by VALUES (now(), 0, 1)")
    node_left.query("INSERT INTO test_ttl_group_by VALUES (now(), 0, 2)")
    node_right.query("INSERT INTO test_ttl_group_by VALUES (now(), 0, 3)")
    node_right.query("INSERT INTO test_ttl_group_by VALUES (now(), 0, 4)")

    node_left.query("INSERT INTO test_ttl_where VALUES (now(), 1)")
    node_left.query("INSERT INTO test_ttl_where VALUES (now(), 2)")
    node_right.query("INSERT INTO test_ttl_where VALUES (now(), 3)")
    node_right.query("INSERT INTO test_ttl_where VALUES (now(), 4)")

    if node_left.with_installed_binary:
        node_left.restart_with_latest_version()

    if node_right.with_installed_binary:
        node_right.restart_with_latest_version()

    time.sleep(5)  # Wait for TTL

    # after restart table can be in readonly mode
    exec_query_with_retry(node_right, "OPTIMIZE TABLE test_ttl_delete FINAL")
    node_right.query("OPTIMIZE TABLE test_ttl_group_by FINAL")
    node_right.query("OPTIMIZE TABLE test_ttl_where FINAL")

    exec_query_with_retry(node_left, "OPTIMIZE TABLE test_ttl_delete FINAL")
    node_left.query("OPTIMIZE TABLE test_ttl_group_by FINAL", timeout=20)
    node_left.query("OPTIMIZE TABLE test_ttl_where FINAL", timeout=20)

    # After OPTIMIZE TABLE, it is not guaranteed that everything is merged.
    # Possible scenario (for test_ttl_group_by):
    # 1. Two independent merges assigned: [0_0, 1_1] -> 0_1 and [2_2, 3_3] -> 2_3
    # 2. Another one merge assigned: [0_1, 2_3] -> 0_3
    # 3. Merge to 0_3 is delayed:
    #    `Not executing log entry for part 0_3 because 2 merges with TTL already executing, maximum 2
    # 4. OPTIMIZE FINAL does nothing, cause there is an entry for 0_3
    #
    # So, let's also sync replicas for node_right (for now).
    exec_query_with_retry(node_right, "SYSTEM SYNC REPLICA test_ttl_delete")
    node_right.query("SYSTEM SYNC REPLICA test_ttl_group_by", timeout=20)
    node_right.query("SYSTEM SYNC REPLICA test_ttl_where", timeout=20)

    exec_query_with_retry(node_left, "SYSTEM SYNC REPLICA test_ttl_delete")
    node_left.query("SYSTEM SYNC REPLICA test_ttl_group_by", timeout=20)
    node_left.query("SYSTEM SYNC REPLICA test_ttl_where", timeout=20)

    assert node_left.query("SELECT id FROM test_ttl_delete ORDER BY id") == "2\n4\n"
    assert node_right.query("SELECT id FROM test_ttl_delete ORDER BY id") == "2\n4\n"

    assert node_left.query("SELECT val FROM test_ttl_group_by ORDER BY id") == "10\n"
    assert node_right.query("SELECT val FROM test_ttl_group_by ORDER BY id") == "10\n"

    assert node_left.query("SELECT id FROM test_ttl_where ORDER BY id") == "2\n4\n"
    assert node_right.query("SELECT id FROM test_ttl_where ORDER BY id") == "2\n4\n"