import random
import string

import pytest
from helpers.cluster import ClickHouseCluster

cluster = ClickHouseCluster(__file__)

node1 = cluster.add_instance('node1', main_configs=['configs/default_compression.xml', 'configs/wide_parts_only.xml'], with_zookeeper=True)
node2 = cluster.add_instance('node2', main_configs=['configs/default_compression.xml', 'configs/wide_parts_only.xml'], with_zookeeper=True)
node3 = cluster.add_instance('node3', main_configs=['configs/default_compression.xml', 'configs/wide_parts_only.xml'], image='yandex/clickhouse-server', tag='20.3.16', stay_alive=True, with_installed_binary=True)
node4 = cluster.add_instance('node4')

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

        yield cluster
    finally:
        cluster.shutdown()


def get_compression_codec_byte(node, table_name, part_name):
    cmd = "tail -c +17 /var/lib/clickhouse/data/default/{}/{}/data1.bin | od -x -N 1 | head -n 1 | awk '{{print $2}}'".format(
        table_name, part_name)
    return node.exec_in_container(["bash", "-c", cmd]).strip()


def get_second_multiple_codec_byte(node, table_name, part_name):
    cmd = "tail -c +17 /var/lib/clickhouse/data/default/{}/{}/data1.bin | od -x -j 11 -N 1 | head -n 1 | awk '{{print $2}}'".format(
        table_name, part_name)
    return node.exec_in_container(["bash", "-c", cmd]).strip()


def get_random_string(length):
    return ''.join(random.choice(string.ascii_uppercase + string.digits) for _ in range(length))


CODECS_MAPPING = {
    'LZ4': '0082',
    'LZ4HC': '0082',  # not an error, same byte
    'ZSTD': '0090',
    'Multiple': '0091',
}


def test_default_codec_single(start_cluster):
    for i, node in enumerate([node1, node2]):
        node.query("""
        CREATE TABLE compression_table (
            key UInt64,
            data1 String CODEC(Default)
        ) ENGINE = ReplicatedMergeTree('/t', '{}') ORDER BY tuple() PARTITION BY key;
        """.format(i))

    # ZSTD(10) and ZSTD(10) after merge
    node1.query("INSERT INTO compression_table VALUES (1, 'x')")

    # ZSTD(10) and LZ4HC(10) after merge
    node1.query("INSERT INTO compression_table VALUES (2, '{}')".format(get_random_string(2048)))

    # ZSTD(10) and LZ4 after merge
    node1.query("INSERT INTO compression_table VALUES (3, '{}')".format(get_random_string(22048)))

    node2.query("SYSTEM SYNC REPLICA compression_table", timeout=15)

    # to reload parts
    node1.query("DETACH TABLE compression_table")
    node2.query("DETACH TABLE compression_table")

    node1.query("ATTACH TABLE compression_table")
    node2.query("ATTACH TABLE compression_table")

    node1.query("SYSTEM FLUSH LOGS")
    node2.query("SYSTEM FLUSH LOGS")

    # Same codec for all
    assert get_compression_codec_byte(node1, "compression_table", "1_0_0_0") == CODECS_MAPPING['ZSTD']
    assert node1.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table' and name = '1_0_0_0'") == "ZSTD(10)\n"
    assert node2.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table' and name = '1_0_0_0'") == "ZSTD(10)\n"

    assert get_compression_codec_byte(node1, "compression_table", "2_0_0_0") == CODECS_MAPPING['ZSTD']
    assert node1.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table' and name = '2_0_0_0'") == "ZSTD(10)\n"
    assert node2.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table' and name = '2_0_0_0'") == "ZSTD(10)\n"

    assert get_compression_codec_byte(node1, "compression_table", "3_0_0_0") == CODECS_MAPPING['ZSTD']
    assert node1.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table' and name = '3_0_0_0'") == "ZSTD(10)\n"
    assert node2.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table' and name = '3_0_0_0'") == "ZSTD(10)\n"

    # just to be sure that replication works
    node1.query("OPTIMIZE TABLE compression_table FINAL")

    node2.query("SYSTEM SYNC REPLICA compression_table", timeout=15)

    # to reload parts
    node1.query("DETACH TABLE compression_table")
    node2.query("DETACH TABLE compression_table")

    node1.query("ATTACH TABLE compression_table")
    node2.query("ATTACH TABLE compression_table")

    node1.query("SYSTEM FLUSH LOGS")
    node2.query("SYSTEM FLUSH LOGS")

    assert get_compression_codec_byte(node1, "compression_table", "1_0_0_1") == CODECS_MAPPING['ZSTD']
    assert node1.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table' and name = '1_0_0_1'") == "ZSTD(10)\n"
    assert node2.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table' and name = '1_0_0_1'") == "ZSTD(10)\n"

    assert get_compression_codec_byte(node1, "compression_table", "2_0_0_1") == CODECS_MAPPING['LZ4HC']
    assert node1.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table' and name = '2_0_0_1'") == "LZ4HC(5)\n"
    assert node2.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table' and name = '2_0_0_1'") == "LZ4HC(5)\n"

    assert get_compression_codec_byte(node1, "compression_table", "3_0_0_1") == CODECS_MAPPING['LZ4']
    assert node1.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table' and name = '3_0_0_1'") == "LZ4\n"
    assert node2.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table' and name = '3_0_0_1'") == "LZ4\n"

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


def test_default_codec_multiple(start_cluster):
    for i, node in enumerate([node1, node2]):
        node.query("""
        CREATE TABLE compression_table_multiple (
            key UInt64,
            data1 String CODEC(NONE, Default)
        ) ENGINE = ReplicatedMergeTree('/d', '{}') ORDER BY tuple() PARTITION BY key;
        """.format(i), settings={"allow_suspicious_codecs": 1})

    # ZSTD(10) and ZSTD(10) after merge
    node1.query("INSERT INTO compression_table_multiple VALUES (1, 'x')")

    # ZSTD(10) and LZ4HC(10) after merge
    node1.query("INSERT INTO compression_table_multiple VALUES (2, '{}')".format(get_random_string(2048)))

    # ZSTD(10) and LZ4 after merge
    node1.query("INSERT INTO compression_table_multiple VALUES (3, '{}')".format(get_random_string(22048)))

    # Same codec for all
    assert get_compression_codec_byte(node1, "compression_table_multiple", "1_0_0_0") == CODECS_MAPPING['Multiple']
    assert get_second_multiple_codec_byte(node1, "compression_table_multiple", "1_0_0_0") == CODECS_MAPPING['ZSTD']
    assert node1.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table_multiple' and name = '1_0_0_0'") == "ZSTD(10)\n"
    assert node2.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table_multiple' and name = '1_0_0_0'") == "ZSTD(10)\n"

    assert get_compression_codec_byte(node1, "compression_table_multiple", "2_0_0_0") == CODECS_MAPPING['Multiple']
    assert get_second_multiple_codec_byte(node1, "compression_table_multiple", "2_0_0_0") == CODECS_MAPPING['ZSTD']
    assert node1.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table_multiple' and name = '2_0_0_0'") == "ZSTD(10)\n"
    assert node2.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table_multiple' and name = '2_0_0_0'") == "ZSTD(10)\n"

    assert get_compression_codec_byte(node1, "compression_table_multiple", "3_0_0_0") == CODECS_MAPPING['Multiple']
    assert get_second_multiple_codec_byte(node1, "compression_table_multiple", "3_0_0_0") == CODECS_MAPPING['ZSTD']
    assert node1.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table_multiple' and name = '3_0_0_0'") == "ZSTD(10)\n"
    assert node2.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table_multiple' and name = '3_0_0_0'") == "ZSTD(10)\n"

    node2.query("SYSTEM SYNC REPLICA compression_table_multiple", timeout=15)

    node1.query("OPTIMIZE TABLE compression_table_multiple FINAL")

    assert get_compression_codec_byte(node1, "compression_table_multiple", "1_0_0_1") == CODECS_MAPPING['Multiple']
    assert get_second_multiple_codec_byte(node1, "compression_table_multiple", "1_0_0_1") == CODECS_MAPPING['ZSTD']
    assert node1.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table_multiple' and name = '1_0_0_1'") == "ZSTD(10)\n"
    assert node2.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table_multiple' and name = '1_0_0_1'") == "ZSTD(10)\n"

    assert get_compression_codec_byte(node1, "compression_table_multiple", "2_0_0_1") == CODECS_MAPPING['Multiple']
    assert get_second_multiple_codec_byte(node1, "compression_table_multiple", "2_0_0_1") == CODECS_MAPPING['LZ4HC']
    assert node1.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table_multiple' and name = '2_0_0_1'") == "LZ4HC(5)\n"
    assert node2.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table_multiple' and name = '2_0_0_1'") == "LZ4HC(5)\n"

    assert get_compression_codec_byte(node1, "compression_table_multiple", "3_0_0_1") == CODECS_MAPPING['Multiple']
    assert get_second_multiple_codec_byte(node1, "compression_table_multiple", "3_0_0_1") == CODECS_MAPPING['LZ4']
    assert node1.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table_multiple' and name = '3_0_0_1'") == "LZ4\n"
    assert node2.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table_multiple' and name = '3_0_0_1'") == "LZ4\n"

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


def test_default_codec_version_update(start_cluster):
    node3.query("""
    CREATE TABLE compression_table (
        key UInt64 CODEC(LZ4HC(7)),
        data1 String
    ) ENGINE = MergeTree ORDER BY tuple() PARTITION BY key;
    """)

    node3.query("INSERT INTO compression_table VALUES (1, 'x')")
    node3.query("INSERT INTO compression_table VALUES (2, '{}')".format(get_random_string(2048)))
    node3.query("INSERT INTO compression_table VALUES (3, '{}')".format(get_random_string(22048)))

    node3.restart_with_latest_version()

    assert node3.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table' and name = '1_1_1_0'") == "ZSTD(1)\n"
    assert node3.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table' and name = '2_2_2_0'") == "ZSTD(1)\n"
    assert node3.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table' and name = '3_3_3_0'") == "ZSTD(1)\n"

    node3.query("OPTIMIZE TABLE compression_table FINAL")

    assert node3.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table' and name = '1_1_1_1'") == "ZSTD(10)\n"
    assert node3.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table' and name = '2_2_2_1'") == "LZ4HC(5)\n"
    assert node3.query(
        "SELECT default_compression_codec FROM system.parts WHERE table = 'compression_table' and name = '3_3_3_1'") == "LZ4\n"

def test_default_codec_for_compact_parts(start_cluster):
    node4.query("""
    CREATE TABLE compact_parts_table (
        key UInt64,
        data String
    )
    ENGINE MergeTree ORDER BY tuple()
    """)

    node4.query("INSERT INTO compact_parts_table VALUES (1, 'Hello world')")
    assert node4.query("SELECT COUNT() FROM compact_parts_table") == "1\n"

    node4.query("ALTER TABLE compact_parts_table DETACH PART 'all_1_1_0'")

    node4.exec_in_container(["bash", "-c", "rm /var/lib/clickhouse/data/default/compact_parts_table/detached/all_1_1_0/default_compression_codec.txt"])

    node4.query("ALTER TABLE compact_parts_table ATTACH PART 'all_1_1_0'")

    assert node4.query("SELECT COUNT() FROM compact_parts_table") == "1\n"

    node4.query("DETACH TABLE compact_parts_table")
    node4.query("ATTACH TABLE compact_parts_table")

    assert node4.query("SELECT COUNT() FROM compact_parts_table") == "1\n"