import os
import warnings
import time

import pymysql
import pytest
import logging
from helpers.client import QueryRuntimeException
from helpers.cluster import ClickHouseCluster

SCRIPT_DIR = os.path.dirname(os.path.realpath(__file__))

cluster = ClickHouseCluster(__file__)
node1 = cluster.add_instance('node1', with_mysql=True, dictionaries=['configs/dictionaries/simple_dictionary.xml'],
                             user_configs=['configs/user_admin.xml', 'configs/user_default.xml'])
node2 = cluster.add_instance('node2', with_mysql=True, dictionaries=['configs/dictionaries/simple_dictionary.xml'],
                             main_configs=['configs/dictionaries/lazy_load.xml', 'configs/allow_remote_node.xml'],
                             user_configs=['configs/user_admin.xml', 'configs/user_default.xml'])
node3 = cluster.add_instance('node3', main_configs=['configs/allow_remote_node.xml'],
                             dictionaries=['configs/dictionaries/dictionary_with_conflict_name.xml',
                                           'configs/dictionaries/conflict_name_dictionary.xml'],
                             user_configs=['configs/user_admin.xml'])
node4 = cluster.add_instance('node4', user_configs=['configs/user_admin.xml', 'configs/config_password.xml'])


def create_mysql_conn(user, password, hostname, port):
    logging.debug("Created MySQL connection user:{}, password:{}, host:{}, port{}".format(user, password, hostname, port))
    return pymysql.connect(
        user=user,
        password=password,
        host=hostname,
        port=port)


def execute_mysql_query(connection, query):
    logging.debug("Execute MySQL query:{}".format(query))
    with warnings.catch_warnings():
        warnings.simplefilter("ignore")
        with connection.cursor() as cursor:
            cursor.execute(query)
        connection.commit()


@pytest.fixture(scope="module")
def started_cluster():
    try:
        cluster.start()
        for clickhouse in [node1, node2, node3, node4]:
            clickhouse.query("CREATE DATABASE test", user="admin")
            clickhouse.query(
                "CREATE TABLE test.xml_dictionary_table (id UInt64, SomeValue1 UInt8, SomeValue2 String) ENGINE = MergeTree() ORDER BY id",
                user="admin")
            clickhouse.query(
                "INSERT INTO test.xml_dictionary_table SELECT number, number % 23, hex(number) from numbers(1000)",
                user="admin")
        yield cluster

    finally:
        cluster.shutdown()


@pytest.mark.parametrize("clickhouse,name,layout", [
    pytest.param(node1, 'complex_node1_hashed', 'LAYOUT(COMPLEX_KEY_HASHED())', id="complex_node1_hashed"),
    pytest.param(node1, 'complex_node1_cache', 'LAYOUT(COMPLEX_KEY_CACHE(SIZE_IN_CELLS 10))', id="complex_node1_cache"),
    pytest.param(node2, 'complex_node2_hashed', 'LAYOUT(COMPLEX_KEY_HASHED())', id="complex_node2_hashed"),
    pytest.param(node2, 'complex_node2_cache', 'LAYOUT(COMPLEX_KEY_CACHE(SIZE_IN_CELLS 10))', id="complex_node2_cache"),
])
def test_create_and_select_mysql(started_cluster, clickhouse, name, layout):
    mysql_conn = create_mysql_conn("root", "clickhouse", started_cluster.mysql_ip, started_cluster.mysql_port)
    execute_mysql_query(mysql_conn, "DROP DATABASE IF EXISTS clickhouse")
    execute_mysql_query(mysql_conn, "CREATE DATABASE clickhouse")
    execute_mysql_query(mysql_conn,
                        "CREATE TABLE clickhouse.{} (key_field1 int, key_field2 bigint, value1 text, value2 float, PRIMARY KEY (key_field1, key_field2))".format(
                            name))
    values = []
    for i in range(1000):
        values.append('(' + ','.join([str(i), str(i * i), str(i) * 5, str(i * 3.14)]) + ')')
    execute_mysql_query(mysql_conn, "INSERT INTO clickhouse.{} VALUES ".format(name) + ','.join(values))

    clickhouse.query("""
    CREATE DICTIONARY default.{} (
        key_field1 Int32,
        key_field2 Int64,
        value1 String DEFAULT 'xxx',
        value2 Float32 DEFAULT 'yyy'
    )
    PRIMARY KEY key_field1, key_field2
    SOURCE(MYSQL(
        USER 'root'
        PASSWORD 'clickhouse'
        DB 'clickhouse'
        TABLE '{}'
        REPLICA(PRIORITY 1 HOST '127.0.0.1' PORT 3333)
        REPLICA(PRIORITY 2 HOST 'mysql57' PORT 3306)
    ))
    {}
    LIFETIME(MIN 1 MAX 3)
    """.format(name, name, layout))

    for i in range(172, 200):
        assert clickhouse.query(
            "SELECT dictGetString('default.{}', 'value1', tuple(toInt32({}), toInt64({})))".format(name, i,
                                                                                                   i * i)) == str(
            i) * 5 + '\n'
        stroka = clickhouse.query(
            "SELECT dictGetFloat32('default.{}', 'value2', tuple(toInt32({}), toInt64({})))".format(name, i,
                                                                                                    i * i)).strip()
        value = float(stroka)
        assert int(value) == int(i * 3.14)

    for i in range(1000):
        values.append('(' + ','.join([str(i), str(i * i), str(i) * 3, str(i * 2.718)]) + ')')
    execute_mysql_query(mysql_conn, "REPLACE INTO clickhouse.{} VALUES ".format(name) + ','.join(values))

    clickhouse.query("SYSTEM RELOAD DICTIONARY 'default.{}'".format(name))

    for i in range(172, 200):
        assert clickhouse.query(
            "SELECT dictGetString('default.{}', 'value1', tuple(toInt32({}), toInt64({})))".format(name, i,
                                                                                                   i * i)) == str(
            i) * 3 + '\n'
        string = clickhouse.query(
            "SELECT dictGetFloat32('default.{}', 'value2', tuple(toInt32({}), toInt64({})))".format(name, i,
                                                                                                    i * i)).strip()
        value = float(string)
        assert int(value) == int(i * 2.718)

    clickhouse.query("select dictGetUInt8('xml_dictionary', 'SomeValue1', toUInt64(17))") == "17\n"
    clickhouse.query("select dictGetString('xml_dictionary', 'SomeValue2', toUInt64(977))") == str(hex(977))[2:] + '\n'


def test_restricted_database(started_cluster):
    for node in [node1, node2]:
        node.query("CREATE DATABASE IF NOT EXISTS restricted_db", user="admin")
        node.query("CREATE TABLE restricted_db.table_in_restricted_db AS test.xml_dictionary_table", user="admin")

    with pytest.raises(QueryRuntimeException):
        node1.query("""
        CREATE DICTIONARY restricted_db.some_dict(
            id UInt64,
            SomeValue1 UInt8,
            SomeValue2 String
        )
        PRIMARY KEY id
        LAYOUT(FLAT())
        SOURCE(CLICKHOUSE(HOST 'localhost' PORT 9000 USER 'default' TABLE 'table_in_restricted_db' DB 'restricted_db'))
        LIFETIME(MIN 1 MAX 10)
        """)

    with pytest.raises(QueryRuntimeException):
        node1.query("""
        CREATE DICTIONARY default.some_dict(
            id UInt64,
            SomeValue1 UInt8,
            SomeValue2 String
        )
        PRIMARY KEY id
        LAYOUT(FLAT())
        SOURCE(CLICKHOUSE(HOST 'localhost' PORT 9000 USER 'default' TABLE 'table_in_restricted_db' DB 'restricted_db'))
        LIFETIME(MIN 1 MAX 10)
        """)

        node1.query("SELECT dictGetUInt8('default.some_dict', 'SomeValue1', toUInt64(17))") == "17\n"

    # with lazy load we don't need query to get exception
    with pytest.raises(QueryRuntimeException):
        node2.query("""
        CREATE DICTIONARY restricted_db.some_dict(
            id UInt64,
            SomeValue1 UInt8,
            SomeValue2 String
        )
        PRIMARY KEY id
        LAYOUT(FLAT())
        SOURCE(CLICKHOUSE(HOST 'localhost' PORT 9000 USER 'default' TABLE 'table_in_restricted_db' DB 'restricted_db'))
        LIFETIME(MIN 1 MAX 10)
        """)

    with pytest.raises(QueryRuntimeException):
        node2.query("""
        CREATE DICTIONARY default.some_dict(
            id UInt64,
            SomeValue1 UInt8,
            SomeValue2 String
        )
        PRIMARY KEY id
        LAYOUT(FLAT())
        SOURCE(CLICKHOUSE(HOST 'localhost' PORT 9000 USER 'default' TABLE 'table_in_restricted_db' DB 'restricted_db'))
        LIFETIME(MIN 1 MAX 10)
        """)


def test_conflicting_name(started_cluster):
    assert node3.query("select dictGetUInt8('test.conflicting_dictionary', 'SomeValue1', toUInt64(17))") == '17\n'

    with pytest.raises(QueryRuntimeException):
        node3.query("""
        CREATE DICTIONARY test.conflicting_dictionary(
            id UInt64,
            SomeValue1 UInt8,
            SomeValue2 String
        )
        PRIMARY KEY id
        LAYOUT(FLAT())
        SOURCE(CLICKHOUSE(HOST 'localhost' PORT 9000 USER 'default' TABLE 'xml_dictionary_table' DB 'test'))
        LIFETIME(MIN 1 MAX 10)
        """)

    # old version still works
    node3.query("select dictGetUInt8('test.conflicting_dictionary', 'SomeValue1', toUInt64(17))") == '17\n'


def test_http_dictionary_restrictions(started_cluster):
    try:
        node3.query("""
        CREATE DICTIONARY test.restricted_http_dictionary (
            id UInt64,
            value String
        )
        PRIMARY KEY id
        LAYOUT(FLAT())
        SOURCE(HTTP(URL 'http://somehost.net' FORMAT TabSeparated))
        LIFETIME(1)
        """)
        node3.query("SELECT dictGetString('test.restricted_http_dictionary', 'value', toUInt64(1))")
    except QueryRuntimeException as ex:
        assert 'is not allowed in config.xml' in str(ex)


def test_file_dictionary_restrictions(started_cluster):
    try:
        node3.query("""
        CREATE DICTIONARY test.restricted_file_dictionary (
            id UInt64,
            value String
        )
        PRIMARY KEY id
        LAYOUT(FLAT())
        SOURCE(FILE(PATH '/usr/bin/cat' FORMAT TabSeparated))
        LIFETIME(1)
        """)
        node3.query("SELECT dictGetString('test.restricted_file_dictionary', 'value', toUInt64(1))")
    except QueryRuntimeException as ex:
        assert 'is not inside' in str(ex)


def test_dictionary_with_where(started_cluster):
    mysql_conn = create_mysql_conn("root", "clickhouse", started_cluster.mysql_ip, started_cluster.mysql_port)
    execute_mysql_query(mysql_conn, "CREATE DATABASE IF NOT EXISTS clickhouse")
    execute_mysql_query(mysql_conn,
                        "CREATE TABLE clickhouse.special_table (key_field1 int, value1 text, PRIMARY KEY (key_field1))")
    execute_mysql_query(mysql_conn, "INSERT INTO clickhouse.special_table VALUES (1, 'abcabc'), (2, 'qweqwe')")

    node1.query("""
    CREATE DICTIONARY default.special_dict (
        key_field1 Int32,
        value1 String DEFAULT 'xxx'
    )
    PRIMARY KEY key_field1
    SOURCE(MYSQL(
        USER 'root'
        PASSWORD 'clickhouse'
        DB 'clickhouse'
        TABLE 'special_table'
        REPLICA(PRIORITY 1 HOST 'mysql57' PORT 3306)
        WHERE 'value1 = \\'qweqwe\\' OR value1 = \\'\\\\u3232\\''
    ))
    LAYOUT(FLAT())
    LIFETIME(MIN 1 MAX 3)
    """)

    node1.query("SYSTEM RELOAD DICTIONARY default.special_dict")

    assert node1.query("SELECT dictGetString('default.special_dict', 'value1', toUInt64(2))") == 'qweqwe\n'


def test_clickhouse_remote(started_cluster):
    with pytest.raises(QueryRuntimeException):
        node3.query("""
        CREATE DICTIONARY test.clickhouse_remote(
            id UInt64,
            SomeValue1 UInt8,
            SomeValue2 String
        )
        PRIMARY KEY id
        LAYOUT(FLAT())
        SOURCE(CLICKHOUSE(HOST 'node4' PORT 9000 USER 'default' TABLE 'xml_dictionary_table' DB 'test'))
        LIFETIME(MIN 1 MAX 10)
        """)
        for i in range(5):
            node3.query("system reload dictionary test.clickhouse_remote")
            time.sleep(0.5)

    node3.query("detach dictionary if exists test.clickhouse_remote")

    with pytest.raises(QueryRuntimeException):
        node3.query("""
            CREATE DICTIONARY test.clickhouse_remote(
                id UInt64,
                SomeValue1 UInt8,
                SomeValue2 String
            )
            PRIMARY KEY id
            LAYOUT(FLAT())
            SOURCE(CLICKHOUSE(HOST 'node4' PORT 9000 USER 'default' PASSWORD 'default' TABLE 'xml_dictionary_table' DB 'test'))
            LIFETIME(MIN 1 MAX 10)
            """)

    node3.query("attach dictionary test.clickhouse_remote")
    node3.query("drop dictionary test.clickhouse_remote")

    node3.query("""
        CREATE DICTIONARY test.clickhouse_remote(
            id UInt64,
            SomeValue1 UInt8,
            SomeValue2 String
        )
        PRIMARY KEY id
        LAYOUT(FLAT())
        SOURCE(CLICKHOUSE(HOST 'node4' PORT 9000 USER 'default' PASSWORD 'default' TABLE 'xml_dictionary_table' DB 'test'))
        LIFETIME(MIN 1 MAX 10)
        """)

    node3.query("select dictGetUInt8('test.clickhouse_remote', 'SomeValue1', toUInt64(17))") == '17\n'