import os
import sys
from contextlib import contextmanager

import pytest

sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
from helpers.client import QueryRuntimeException, QueryTimeoutExceedException
from helpers.cluster import ClickHouseCluster
from helpers.test_tools import TSV

cluster = ClickHouseCluster(__file__)

node1 = cluster.add_instance("node1", main_configs=["configs/remote_servers.xml"])
node2 = cluster.add_instance("node2", main_configs=["configs/remote_servers.xml"])


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

        for node in (node1, node2):
            node.query(
                """
CREATE TABLE local_table(date Date, val UInt64) ENGINE = MergeTree() PARTITION BY toYYYYMM(date) ORDER BY (date, val);
"""
            )

        node1.query(
            """
CREATE TABLE distributed_table(date Date, val UInt64) ENGINE = Distributed(test_cluster, default, local_table)
"""
        )

        yield cluster

    finally:
        cluster.shutdown()


def test_insertion_sync(started_cluster):
    node1.query(
        """SET distributed_foreground_insert = 1, distributed_background_insert_timeout = 0;
    INSERT INTO distributed_table SELECT today() as date, number as val FROM system.numbers LIMIT 10000"""
    )

    assert node2.query("SELECT count() FROM local_table").rstrip() == "10000"

    node1.query(
        """
    SET distributed_foreground_insert = 1, distributed_background_insert_timeout = 1;
    INSERT INTO distributed_table SELECT today() - 1 as date, number as val FROM system.numbers LIMIT 10000"""
    )

    assert node2.query("SELECT count() FROM local_table").rstrip() == "20000"

    # Insert with explicitly specified columns.
    node1.query(
        """
    SET distributed_foreground_insert = 1, distributed_background_insert_timeout = 1;
    INSERT INTO distributed_table(date, val) VALUES ('2000-01-01', 100500)"""
    )

    # Insert with columns specified in different order.
    node1.query(
        """
    SET distributed_foreground_insert = 1, distributed_background_insert_timeout = 1;
    INSERT INTO distributed_table(val, date) VALUES (100500, '2000-01-01')"""
    )

    # Insert with an incomplete list of columns.
    node1.query(
        """
    SET distributed_foreground_insert = 1, distributed_background_insert_timeout = 1;
    INSERT INTO distributed_table(val) VALUES (100500)"""
    )

    expected = TSV(
        """
1970-01-01	100500
2000-01-01	100500
2000-01-01	100500"""
    )
    assert (
        TSV(
            node2.query(
                "SELECT date, val FROM local_table WHERE val = 100500 ORDER BY date"
            )
        )
        == expected
    )

    node1.query("TRUNCATE TABLE local_table SYNC")
    node2.query("TRUNCATE TABLE local_table SYNC")


"""
def test_insertion_sync_fails_on_error(started_cluster):
    with PartitionManager() as pm:
        pm.partition_instances(node2, node1, action='REJECT --reject-with tcp-reset')
        with pytest.raises(QueryRuntimeException):
            node1.query('''
            SET distributed_foreground_insert = 1, distributed_background_insert_timeout = 0;
            INSERT INTO distributed_table SELECT today() as date, number as val FROM system.numbers''', timeout=2)
"""


def test_insertion_sync_fails_with_timeout(started_cluster):
    with pytest.raises(QueryRuntimeException):
        node1.query(
            """
        SET distributed_foreground_insert = 1, distributed_background_insert_timeout = 1;
        INSERT INTO distributed_table SELECT today() as date, number as val FROM system.numbers"""
        )


def test_insertion_without_sync_ignores_timeout(started_cluster):
    with pytest.raises(QueryTimeoutExceedException):
        node1.query(
            """
        SET distributed_foreground_insert = 0, distributed_background_insert_timeout = 1;
        INSERT INTO distributed_table SELECT today() as date, number as val FROM system.numbers""",
            timeout=1.5,
        )


def test_insertion_sync_with_disabled_timeout(started_cluster):
    with pytest.raises(QueryTimeoutExceedException):
        node1.query(
            """
        SET distributed_foreground_insert = 1, distributed_background_insert_timeout = 0;
        INSERT INTO distributed_table SELECT today() as date, number as val FROM system.numbers""",
            timeout=1,
        )


def test_async_inserts_into_local_shard(started_cluster):
    node1.query("""CREATE TABLE shard_local (i Int64) ENGINE = Memory""")
    node1.query(
        """CREATE TABLE shard_distributed (i Int64) ENGINE = Distributed(local_shard_with_internal_replication, default, shard_local)"""
    )
    node1.query(
        """INSERT INTO shard_distributed VALUES (1)""",
        settings={"distributed_foreground_insert": 0},
    )

    assert TSV(node1.query("""SELECT count() FROM shard_distributed""")) == TSV("1\n")
    node1.query("""DETACH TABLE shard_distributed""")
    node1.query("""ATTACH TABLE shard_distributed""")
    assert TSV(node1.query("""SELECT count() FROM shard_distributed""")) == TSV("1\n")

    node1.query("""DROP TABLE shard_distributed""")
    node1.query("""DROP TABLE shard_local""")


if __name__ == "__main__":
    with contextmanager(started_cluster)() as cluster:
        for name, instance in list(cluster.instances.items()):
            print(name, instance.ip_address)
        input("Cluster created, press any key to destroy...")