import random
import string
import logging
import pytest
import time
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"

    node1.query("DROP TABLE compression_table SYNC")
    node2.query("DROP TABLE compression_table SYNC")


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"

    node1.query("DROP TABLE compression_table_multiple SYNC")
    node2.query("DROP TABLE compression_table_multiple SYNC")


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)
        )
    )

    old_version = node3.query("SELECT version()")
    node3.restart_with_latest_version()
    new_version = node3.query("SELECT version()")
    logging.debug(f"Updated from {old_version} to {new_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"
    )

    node3.query("DROP TABLE compression_table SYNC")

    def callback(n):
        n.exec_in_container(
            [
                "bash",
                "-c",
                "rm -rf /var/lib/clickhouse/metadata/system /var/lib/clickhouse/data/system ",
            ],
            user="root",
        )

    node3.restart_with_original_version(callback_onstop=callback)

    cur_version = node3.query("SELECT version()")
    logging.debug(f"End with {cur_version}")


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"
    node4.query("DROP TABLE compact_parts_table SYNC")