import random
import string

import pytest
from helpers.cluster import ClickHouseCluster

cluster = ClickHouseCluster(__file__)

node1 = cluster.add_instance(
    "node1",
    main_configs=["configs/zstd_compression_by_default.xml"],
    user_configs=["configs/allow_suspicious_codecs.xml"],
)
node2 = cluster.add_instance(
    "node2",
    main_configs=["configs/lz4hc_compression_by_default.xml"],
    user_configs=["configs/allow_suspicious_codecs.xml"],
)
node3 = cluster.add_instance(
    "node3",
    main_configs=["configs/custom_compression_by_default.xml"],
    user_configs=["configs/allow_suspicious_codecs.xml"],
)
node4 = cluster.add_instance(
    "node4",
    user_configs=[
        "configs/enable_uncompressed_cache.xml",
        "configs/allow_suspicious_codecs.xml",
    ],
)
node5 = cluster.add_instance(
    "node5",
    main_configs=["configs/zstd_compression_by_default.xml"],
    user_configs=[
        "configs/enable_uncompressed_cache.xml",
        "configs/allow_suspicious_codecs.xml",
    ],
)
node6 = cluster.add_instance(
    "node6",
    main_configs=["configs/allow_experimental_codecs.xml"],
    user_configs=["configs/allow_suspicious_codecs.xml"],
)


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

        yield cluster
    finally:
        cluster.shutdown()


def test_preconfigured_default_codec(start_cluster):
    for node in [node1, node2]:
        node.query(
            """
        CREATE TABLE compression_codec_multiple_with_key (
            somedate Date CODEC(ZSTD, ZSTD, ZSTD(12), LZ4HC(12)),
            id UInt64 CODEC(LZ4, ZSTD, NONE, LZ4HC),
            data String CODEC(ZSTD(2), LZ4HC, NONE, LZ4, LZ4),
            somecolumn Float64
        ) ENGINE = MergeTree() PARTITION BY somedate ORDER BY id SETTINGS index_granularity = 2;
        """
        )
        node.query(
            "INSERT INTO compression_codec_multiple_with_key VALUES(toDate('2018-10-12'), 100000, 'hello', 88.88), (toDate('2018-10-12'), 100002, 'world', 99.99), (toDate('2018-10-12'), 1111, '!', 777.777)"
        )
        assert (
            node.query(
                "SELECT COUNT(*) FROM compression_codec_multiple_with_key WHERE id % 2 == 0"
            )
            == "2\n"
        )
        assert (
            node.query(
                "SELECT DISTINCT somecolumn FROM compression_codec_multiple_with_key ORDER BY id"
            )
            == "777.777\n88.88\n99.99\n"
        )
        assert (
            node.query(
                "SELECT data FROM compression_codec_multiple_with_key WHERE id >= 1112 AND somedate = toDate('2018-10-12') AND somecolumn <= 100"
            )
            == "hello\nworld\n"
        )

        node.query(
            "INSERT INTO compression_codec_multiple_with_key SELECT toDate('2018-10-12'), number, toString(number), 1.0 FROM system.numbers LIMIT 10000"
        )

        assert (
            node.query(
                "SELECT COUNT(id) FROM compression_codec_multiple_with_key WHERE id % 10 == 0"
            )
            == "1001\n"
        )
        assert (
            node.query(
                "SELECT SUM(somecolumn) FROM compression_codec_multiple_with_key"
            )
            == str(777.777 + 88.88 + 99.99 + 1.0 * 10000) + "\n"
        )
        assert (
            node.query(
                "SELECT count(*) FROM compression_codec_multiple_with_key GROUP BY somedate"
            )
            == "10003\n"
        )


def test_preconfigured_custom_codec(start_cluster):
    node3.query(
        """
    CREATE TABLE compression_codec_multiple_with_key (
        somedate Date CODEC(ZSTD, ZSTD, ZSTD(12), LZ4HC(12)),
        id UInt64 CODEC(LZ4, ZSTD, NONE, LZ4HC),
        data String,
        somecolumn Float64 CODEC(ZSTD(2), LZ4HC, NONE, NONE, NONE, LZ4HC(5))
    ) ENGINE = MergeTree() PARTITION BY somedate ORDER BY id SETTINGS index_granularity = 2;
    """
    )

    node3.query(
        "INSERT INTO compression_codec_multiple_with_key VALUES(toDate('2018-10-12'), 100000, 'hello', 88.88), (toDate('2018-10-12'), 100002, 'world', 99.99), (toDate('2018-10-12'), 1111, '!', 777.777)"
    )
    assert (
        node3.query(
            "SELECT COUNT(*) FROM compression_codec_multiple_with_key WHERE id % 2 == 0"
        )
        == "2\n"
    )
    assert (
        node3.query(
            "SELECT DISTINCT somecolumn FROM compression_codec_multiple_with_key ORDER BY id"
        )
        == "777.777\n88.88\n99.99\n"
    )
    assert (
        node3.query(
            "SELECT data FROM compression_codec_multiple_with_key WHERE id >= 1112 AND somedate = toDate('2018-10-12') AND somecolumn <= 100"
        )
        == "hello\nworld\n"
    )

    node3.query(
        "INSERT INTO compression_codec_multiple_with_key VALUES(toDate('2018-10-12'), 100000, '{}', 88.88)".format(
            "".join(
                random.choice(string.ascii_uppercase + string.digits)
                for _ in range(10000)
            )
        )
    )

    node3.query("OPTIMIZE TABLE compression_codec_multiple_with_key FINAL")
    assert (
        node3.query(
            "SELECT max(length(data)) from compression_codec_multiple_with_key GROUP BY data ORDER BY max(length(data)) DESC LIMIT 1"
        )
        == "10000\n"
    )

    for i in range(10):
        node3.query(
            "INSERT INTO compression_codec_multiple_with_key VALUES(toDate('2018-10-12'), {}, '{}', 88.88)".format(
                i,
                "".join(
                    random.choice(string.ascii_uppercase + string.digits)
                    for _ in range(10000)
                ),
            )
        )

    node3.query("OPTIMIZE TABLE compression_codec_multiple_with_key FINAL")

    assert (
        node3.query(
            "SELECT COUNT(*) from compression_codec_multiple_with_key WHERE length(data) = 10000"
        )
        == "11\n"
    )


def test_uncompressed_cache_custom_codec(start_cluster):
    node4.query(
        """
    CREATE TABLE compression_codec_multiple_with_key (
        somedate Date CODEC(ZSTD, ZSTD, ZSTD(12), LZ4HC(12)),
        id UInt64 CODEC(LZ4, ZSTD, NONE, LZ4HC),
        data String,
        somecolumn Float64 CODEC(ZSTD(2), LZ4HC, NONE, NONE, NONE, LZ4HC(5))
    ) ENGINE = MergeTree() PARTITION BY somedate ORDER BY id SETTINGS index_granularity = 2;
    """
    )

    node4.query(
        "INSERT INTO compression_codec_multiple_with_key VALUES(toDate('2018-10-12'), 100000, '{}', 88.88)".format(
            "".join(
                random.choice(string.ascii_uppercase + string.digits)
                for _ in range(10000)
            )
        )
    )

    # two equal requests one by one, to get into UncompressedCache for the first block
    assert (
        node4.query(
            "SELECT max(length(data)) from compression_codec_multiple_with_key GROUP BY data ORDER BY max(length(data)) DESC LIMIT 1"
        )
        == "10000\n"
    )

    assert (
        node4.query(
            "SELECT max(length(data)) from compression_codec_multiple_with_key GROUP BY data ORDER BY max(length(data)) DESC LIMIT 1"
        )
        == "10000\n"
    )


def test_uncompressed_cache_plus_zstd_codec(start_cluster):
    node5.query(
        """
    CREATE TABLE compression_codec_multiple_with_key (
        somedate Date CODEC(ZSTD, ZSTD, ZSTD(12), LZ4HC(12)),
        id UInt64 CODEC(LZ4, ZSTD, NONE, LZ4HC),
        data String,
        somecolumn Float64 CODEC(ZSTD(2), LZ4HC, NONE, NONE, NONE, LZ4HC(5))
    ) ENGINE = MergeTree() PARTITION BY somedate ORDER BY id SETTINGS index_granularity = 2;
    """
    )

    node5.query(
        "INSERT INTO compression_codec_multiple_with_key VALUES(toDate('2018-10-12'), 100000, '{}', 88.88)".format(
            "a" * 10000
        )
    )

    assert (
        node5.query(
            "SELECT max(length(data)) from compression_codec_multiple_with_key GROUP BY data ORDER BY max(length(data)) DESC LIMIT 1"
        )
        == "10000\n"
    )