import os
import random
import string
import struct

import pytest
from helpers.cluster import ClickHouseCluster, CLICKHOUSE_CI_MIN_TESTED_VERSION
from helpers.test_tools import TSV
from helpers.test_tools import assert_eq_with_retry, exec_query_with_retry

cluster = ClickHouseCluster(__file__)


def get_random_array():
    return [random.randint(0, 1000) % 1000 for _ in range(random.randint(0, 1000))]


def get_random_string():
    length = random.randint(0, 1000)
    return "".join(
        random.choice(string.ascii_uppercase + string.digits) for _ in range(length)
    )


def insert_random_data(table, node, size):
    data = [
        "("
        + ",".join(
            (
                "'2019-10-11'",
                str(i),
                "'" + get_random_string() + "'",
                str(get_random_array()),
            )
        )
        + ")"
        for i in range(size)
    ]

    node.query("INSERT INTO {} VALUES {}".format(table, ",".join(data)))


def create_tables(name, nodes, node_settings, shard):
    for i, (node, settings) in enumerate(zip(nodes, node_settings)):
        node.query(
            """
            CREATE TABLE {name}(date Date, id UInt32, s String, arr Array(Int32))
            ENGINE = ReplicatedMergeTree('/clickhouse/tables/test/{shard}/{name}', '{repl}')
            PARTITION BY toYYYYMM(date)
            ORDER BY id
            SETTINGS index_granularity = 64, index_granularity_bytes = {index_granularity_bytes},
            min_rows_for_wide_part = {min_rows_for_wide_part},
            min_bytes_for_wide_part = 0
            """.format(
                name=name, shard=shard, repl=i, **settings
            )
        )


def create_tables_old_format(name, nodes, shard):
    for i, node in enumerate(nodes):
        node.query(
            """
            CREATE TABLE {name}(date Date, id UInt32, s String, arr Array(Int32))
            ENGINE = ReplicatedMergeTree('/clickhouse/tables/test/{shard}/{name}', '{repl}', date, id, 64)
            """.format(
                name=name, shard=shard, repl=i
            ),
            settings={"allow_deprecated_syntax_for_merge_tree": 1},
        )


node1 = cluster.add_instance(
    "node1",
    main_configs=[],
    user_configs=["configs/users.d/not_optimize_count.xml"],
    with_zookeeper=True,
)
node2 = cluster.add_instance(
    "node2",
    main_configs=[],
    user_configs=["configs/users.d/not_optimize_count.xml"],
    with_zookeeper=True,
)

settings_default = {
    "index_granularity_bytes": 10485760,
    "min_rows_for_wide_part": 512,
}
settings_compact_only = {
    "index_granularity_bytes": 10485760,
    "min_rows_for_wide_part": 1000000,
}
settings_not_adaptive = {
    "index_granularity_bytes": 0,
    "min_rows_for_wide_part": 512,
}

node3 = cluster.add_instance(
    "node3",
    main_configs=[],
    user_configs=["configs/users.d/not_optimize_count.xml"],
    with_zookeeper=True,
)
node4 = cluster.add_instance(
    "node4",
    user_configs=["configs/users.d/not_optimize_count.xml"],
    main_configs=["configs/no_leader.xml"],
    with_zookeeper=True,
)

settings_compact = {
    "index_granularity_bytes": 10485760,
    "min_rows_for_wide_part": 512,
}
settings_wide = {
    "index_granularity_bytes": 10485760,
    "min_rows_for_wide_part": 0,
}

node5 = cluster.add_instance(
    "node5", main_configs=["configs/compact_parts.xml"], with_zookeeper=True
)
node6 = cluster.add_instance(
    "node6", main_configs=["configs/compact_parts.xml"], with_zookeeper=True
)

node9 = cluster.add_instance("node9", with_zookeeper=True, stay_alive=True)
node10 = cluster.add_instance("node10", with_zookeeper=True)

node11 = cluster.add_instance(
    "node11",
    main_configs=["configs/do_not_merge.xml"],
    with_zookeeper=True,
    stay_alive=True,
)
node12 = cluster.add_instance(
    "node12",
    main_configs=["configs/do_not_merge.xml"],
    with_zookeeper=True,
    stay_alive=True,
)


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

        create_tables(
            "polymorphic_table",
            [node1, node2],
            [settings_default, settings_default],
            "shard1",
        )
        create_tables(
            "compact_parts_only",
            [node1, node2],
            [settings_compact_only, settings_compact_only],
            "shard1",
        )
        create_tables(
            "non_adaptive_table",
            [node1, node2],
            [settings_not_adaptive, settings_not_adaptive],
            "shard1",
        )
        create_tables(
            "polymorphic_table_compact",
            [node3, node4],
            [settings_compact, settings_wide],
            "shard2",
        )
        create_tables(
            "polymorphic_table_wide",
            [node3, node4],
            [settings_wide, settings_compact],
            "shard2",
        )
        create_tables_old_format("polymorphic_table", [node5, node6], "shard3")

        yield cluster

    finally:
        cluster.shutdown()


@pytest.mark.parametrize(
    ("first_node", "second_node"),
    [
        (node1, node2),  # compact parts
        (node5, node6),  # compact parts, old-format
    ],
)
def test_polymorphic_parts_basics(start_cluster, first_node, second_node):
    first_node.query("SYSTEM STOP MERGES")
    second_node.query("SYSTEM STOP MERGES")

    for size in [300, 300, 600]:
        insert_random_data("polymorphic_table", first_node, size)
    second_node.query("SYSTEM SYNC REPLICA polymorphic_table", timeout=20)

    assert first_node.query("SELECT count() FROM polymorphic_table") == "1200\n"
    assert second_node.query("SELECT count() FROM polymorphic_table") == "1200\n"

    expected = "Compact\t2\nWide\t1\n"

    assert TSV(
        first_node.query(
            "SELECT part_type, count() FROM system.parts "
            "WHERE table = 'polymorphic_table' AND active GROUP BY part_type ORDER BY part_type"
        )
    ) == TSV(expected)
    assert TSV(
        second_node.query(
            "SELECT part_type, count() FROM system.parts "
            "WHERE table = 'polymorphic_table' AND active GROUP BY part_type ORDER BY part_type"
        )
    ) == TSV(expected)

    first_node.query("SYSTEM START MERGES")
    second_node.query("SYSTEM START MERGES")

    for _ in range(40):
        insert_random_data("polymorphic_table", first_node, 10)
        insert_random_data("polymorphic_table", second_node, 10)

    first_node.query("SYSTEM SYNC REPLICA polymorphic_table", timeout=20)
    second_node.query("SYSTEM SYNC REPLICA polymorphic_table", timeout=20)

    assert first_node.query("SELECT count() FROM polymorphic_table") == "2000\n"
    assert second_node.query("SELECT count() FROM polymorphic_table") == "2000\n"

    first_node.query("OPTIMIZE TABLE polymorphic_table FINAL")
    second_node.query("SYSTEM SYNC REPLICA polymorphic_table", timeout=20)

    assert first_node.query("SELECT count() FROM polymorphic_table") == "2000\n"
    assert second_node.query("SELECT count() FROM polymorphic_table") == "2000\n"

    assert (
        first_node.query(
            "SELECT DISTINCT part_type FROM system.parts WHERE table = 'polymorphic_table' AND active"
        )
        == "Wide\n"
    )
    assert (
        second_node.query(
            "SELECT DISTINCT part_type FROM system.parts WHERE table = 'polymorphic_table' AND active"
        )
        == "Wide\n"
    )

    # Check alters and mutations also work
    first_node.query("ALTER TABLE polymorphic_table ADD COLUMN ss String")
    first_node.query("ALTER TABLE polymorphic_table UPDATE ss = toString(id) WHERE 1")

    second_node.query("SYSTEM SYNC REPLICA polymorphic_table", timeout=20)

    first_node.query("SELECT count(ss) FROM polymorphic_table") == "2000\n"
    first_node.query("SELECT uniqExact(ss) FROM polymorphic_table") == "600\n"

    second_node.query("SELECT count(ss) FROM polymorphic_table") == "2000\n"
    second_node.query("SELECT uniqExact(ss) FROM polymorphic_table") == "600\n"


# Checks mostly that merge from compact part to compact part works.
def test_compact_parts_only(start_cluster):
    for i in range(20):
        insert_random_data("compact_parts_only", node1, 100)
        insert_random_data("compact_parts_only", node2, 100)

    node1.query("SYSTEM SYNC REPLICA compact_parts_only", timeout=20)
    node2.query("SYSTEM SYNC REPLICA compact_parts_only", timeout=20)

    assert node1.query("SELECT count() FROM compact_parts_only") == "4000\n"
    assert node2.query("SELECT count() FROM compact_parts_only") == "4000\n"

    assert (
        node1.query(
            "SELECT DISTINCT part_type FROM system.parts WHERE table = 'compact_parts_only' AND active"
        )
        == "Compact\n"
    )
    assert (
        node2.query(
            "SELECT DISTINCT part_type FROM system.parts WHERE table = 'compact_parts_only' AND active"
        )
        == "Compact\n"
    )

    node1.query("OPTIMIZE TABLE compact_parts_only FINAL")
    node2.query("SYSTEM SYNC REPLICA compact_parts_only", timeout=20)
    assert node2.query("SELECT count() FROM compact_parts_only") == "4000\n"

    expected = "Compact\t1\n"
    assert TSV(
        node1.query(
            "SELECT part_type, count() FROM system.parts "
            "WHERE table = 'compact_parts_only' AND active GROUP BY part_type ORDER BY part_type"
        )
    ) == TSV(expected)
    assert TSV(
        node2.query(
            "SELECT part_type, count() FROM system.parts "
            "WHERE table = 'compact_parts_only' AND active GROUP BY part_type ORDER BY part_type"
        )
    ) == TSV(expected)


# Check that follower replicas create parts of the same type, which leader has chosen at merge.
@pytest.mark.parametrize(
    ("table", "part_type"),
    [("polymorphic_table_compact", "Compact"), ("polymorphic_table_wide", "Wide")],
)
def test_different_part_types_on_replicas(start_cluster, table, part_type):
    leader = node3
    follower = node4

    assert (
        leader.query(
            "SELECT is_leader FROM system.replicas WHERE table = '{}'".format(table)
        )
        == "1\n"
    )
    assert (
        node4.query(
            "SELECT is_leader FROM system.replicas WHERE table = '{}'".format(table)
        )
        == "0\n"
    )

    for _ in range(3):
        insert_random_data(table, leader, 100)

    exec_query_with_retry(
        leader,
        "OPTIMIZE TABLE {} FINAL".format(table),
        settings={"optimize_throw_if_noop": 1},
        silent=True,
    )

    follower.query("SYSTEM SYNC REPLICA {}".format(table), timeout=20)

    expected = "{}\t1\n".format(part_type)

    assert TSV(
        leader.query(
            "SELECT part_type, count() FROM system.parts "
            "WHERE table = '{}' AND active GROUP BY part_type ORDER BY part_type".format(
                table
            )
        )
    ) == TSV(expected)
    assert TSV(
        follower.query(
            "SELECT part_type, count() FROM system.parts "
            "WHERE table = '{}' AND active GROUP BY part_type ORDER BY part_type".format(
                table
            )
        )
    ) == TSV(expected)


node7 = cluster.add_instance(
    "node7",
    user_configs=["configs_old/users.d/not_optimize_count.xml"],
    with_zookeeper=True,
    image="clickhouse/clickhouse-server",
    tag=CLICKHOUSE_CI_MIN_TESTED_VERSION,
    stay_alive=True,
    with_installed_binary=True,
)
node8 = cluster.add_instance(
    "node8",
    user_configs=["configs/users.d/not_optimize_count.xml"],
    with_zookeeper=True,
)

settings7 = {"index_granularity_bytes": 10485760}
settings8 = {
    "index_granularity_bytes": 10485760,
    "min_rows_for_wide_part": 512,
}


@pytest.fixture(scope="module")
def start_cluster_diff_versions():
    try:
        for name in ["polymorphic_table", "polymorphic_table_2"]:
            cluster.start()
            node7.query(
                """
                CREATE TABLE {name}(date Date, id UInt32, s String, arr Array(Int32))
                ENGINE = ReplicatedMergeTree('/clickhouse/tables/test/shard5/{name}', '1')
                PARTITION BY toYYYYMM(date)
                ORDER BY id
                SETTINGS index_granularity = 64, index_granularity_bytes = {index_granularity_bytes}
                """.format(
                    name=name, **settings7
                )
            )

            node8.query(
                """
                CREATE TABLE {name}(date Date, id UInt32, s String, arr Array(Int32))
                ENGINE = ReplicatedMergeTree('/clickhouse/tables/test/shard5/{name}', '2')
                PARTITION BY toYYYYMM(date)
                ORDER BY id
                SETTINGS index_granularity = 64, index_granularity_bytes = {index_granularity_bytes},
                min_rows_for_wide_part = {min_rows_for_wide_part}, min_bytes_for_wide_part = {min_bytes_for_wide_part}
                """.format(
                    name=name, **settings8
                )
            )

        yield cluster

    finally:
        cluster.shutdown()


def test_polymorphic_parts_non_adaptive(start_cluster):
    node1.query("SYSTEM STOP MERGES")
    node2.query("SYSTEM STOP MERGES")

    insert_random_data("non_adaptive_table", node1, 100)
    node2.query("SYSTEM SYNC REPLICA non_adaptive_table", timeout=20)

    insert_random_data("non_adaptive_table", node2, 100)
    node1.query("SYSTEM SYNC REPLICA non_adaptive_table", timeout=20)

    assert TSV(
        node1.query(
            "SELECT part_type, count() FROM system.parts "
            "WHERE table = 'non_adaptive_table' AND active GROUP BY part_type ORDER BY part_type"
        )
    ) == TSV("Wide\t2\n")
    assert TSV(
        node2.query(
            "SELECT part_type, count() FROM system.parts "
            "WHERE table = 'non_adaptive_table' AND active GROUP BY part_type ORDER BY part_type"
        )
    ) == TSV("Wide\t2\n")

    assert node1.contains_in_log(
        "<Warning> default.non_adaptive_table ([0-9a-f-]*): Table can't create parts with adaptive granularity"
    )


def test_polymorphic_parts_index(start_cluster):
    node1.query(
        "CREATE DATABASE test_index ENGINE=Ordinary",
        settings={"allow_deprecated_database_ordinary": 1},
    )  # Different paths with Atomic
    node1.query(
        """
        CREATE TABLE test_index.index_compact(a UInt32, s String)
        ENGINE = MergeTree ORDER BY a
        SETTINGS min_rows_for_wide_part = 1000, index_granularity = 128, merge_max_block_size = 100, compress_marks=false, compress_primary_key=false, ratio_of_defaults_for_sparse_serialization=1"""
    )

    node1.query(
        "INSERT INTO test_index.index_compact SELECT number, toString(number) FROM numbers(100)"
    )
    node1.query(
        "INSERT INTO test_index.index_compact SELECT number, toString(number) FROM numbers(30)"
    )
    node1.query("OPTIMIZE TABLE test_index.index_compact FINAL")

    assert (
        node1.query(
            "SELECT part_type FROM system.parts WHERE table = 'index_compact' AND active"
        )
        == "Compact\n"
    )
    assert (
        node1.query(
            "SELECT marks FROM system.parts WHERE table = 'index_compact' AND active"
        )
        == "2\n"
    )

    index_path = os.path.join(
        node1.path, "database/data/test_index/index_compact/all_1_2_1/primary.idx"
    )
    f = open(index_path, "rb")

    assert os.path.getsize(index_path) == 8
    assert struct.unpack("I", f.read(4))[0] == 0
    assert struct.unpack("I", f.read(4))[0] == 99