# coding: utf-8

import docker
import datetime
import math
import os
import pytest
import subprocess
import time
import pymysql.connections

from docker.models.containers import Container

from helpers.cluster import ClickHouseCluster, get_docker_compose_path


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

config_dir = os.path.join(SCRIPT_DIR, './configs')
cluster = ClickHouseCluster(__file__)
node = cluster.add_instance('node', config_dir=config_dir, env_variables={'UBSAN_OPTIONS': 'print_stacktrace=1'})

server_port = 9001


@pytest.fixture(scope="module")
def server_address():
    cluster.start()
    try:
        yield cluster.get_instance_ip('node')
    finally:
        cluster.shutdown()


@pytest.fixture(scope='module')
def mysql_client():
    docker_compose = os.path.join(DOCKER_COMPOSE_PATH, 'docker_compose_mysql_client.yml')
    subprocess.check_call(['docker-compose', '-p', cluster.project_name, '-f', docker_compose, 'up', '--no-recreate', '-d', '--build'])
    yield docker.from_env().containers.get(cluster.project_name + '_mysql1_1')


@pytest.fixture(scope='module')
def mysql_server(mysql_client):
    """Return MySQL container when it is healthy.

    :type mysql_client: Container
    :rtype: Container
    """
    retries = 30
    for i in range(retries):
        info = mysql_client.client.api.inspect_container(mysql_client.name)
        if info['State']['Health']['Status'] == 'healthy':
            break
        time.sleep(1)
    else:
        raise Exception('Mysql server has not started in %d seconds.' % retries)

    return mysql_client


@pytest.fixture(scope='module')
def golang_container():
    docker_compose = os.path.join(DOCKER_COMPOSE_PATH, 'docker_compose_mysql_golang_client.yml')
    subprocess.check_call(['docker-compose', '-p', cluster.project_name, '-f', docker_compose, 'up', '--no-recreate', '-d', '--build'])
    yield docker.from_env().containers.get(cluster.project_name + '_golang1_1')


@pytest.fixture(scope='module')
def php_container():
    docker_compose = os.path.join(DOCKER_COMPOSE_PATH, 'docker_compose_mysql_php_client.yml')
    subprocess.check_call(['docker-compose', '-p', cluster.project_name, '-f', docker_compose, 'up', '--no-recreate', '-d', '--build'])
    yield docker.from_env().containers.get(cluster.project_name + '_php1_1')


@pytest.fixture(scope='module')
def nodejs_container():
    docker_compose = os.path.join(DOCKER_COMPOSE_PATH, 'docker_compose_mysql_js_client.yml')
    subprocess.check_call(['docker-compose', '-p', cluster.project_name, '-f', docker_compose, 'up', '--no-recreate', '-d', '--build'])
    yield docker.from_env().containers.get(cluster.project_name + '_mysqljs1_1')


@pytest.fixture(scope='module')
def java_container():
    docker_compose = os.path.join(DOCKER_COMPOSE_PATH, 'docker_compose_mysql_java_client.yml')
    subprocess.check_call(['docker-compose', '-p', cluster.project_name, '-f', docker_compose, 'up', '--no-recreate', '-d', '--build'])
    yield docker.from_env().containers.get(cluster.project_name + '_java1_1')


def test_mysql_client(mysql_client, server_address):
    # type: (Container, str) -> None
    code, (stdout, stderr) = mysql_client.exec_run('''
        mysql --protocol tcp -h {host} -P {port} default -u user_with_double_sha1 --password=abacaba
        -e "SELECT 1;"
    '''.format(host=server_address, port=server_port), demux=True)

    assert stdout == '\n'.join(['1', '1', ''])

    code, (stdout, stderr) = mysql_client.exec_run('''
        mysql --protocol tcp -h {host} -P {port} default -u default --password=123
        -e "SELECT 1 as a;"
        -e "SELECT 'тест' as b;"
    '''.format(host=server_address, port=server_port), demux=True)

    assert stdout == '\n'.join(['a', '1', 'b', 'тест', ''])

    code, (stdout, stderr) = mysql_client.exec_run('''
        mysql --protocol tcp -h {host} -P {port} default -u default --password=abc -e "select 1 as a;"
    '''.format(host=server_address, port=server_port), demux=True)

    assert stderr == 'mysql: [Warning] Using a password on the command line interface can be insecure.\n' \
                     'ERROR 516 (00000): default: Authentication failed: password is incorrect or there is no user with such name\n'

    code, (stdout, stderr) = mysql_client.exec_run('''
        mysql --protocol tcp -h {host} -P {port} default -u default --password=123
        -e "use system;"
        -e "select count(*) from (select name from tables limit 1);"
        -e "use system2;"
    '''.format(host=server_address, port=server_port), demux=True)

    assert stdout == 'count()\n1\n'
    assert stderr[0:182] == "mysql: [Warning] Using a password on the command line interface can be insecure.\n" \
                     "ERROR 81 (00000) at line 1: Code: 81, e.displayText() = DB::Exception: Database system2 doesn't exist"

    code, (stdout, stderr) = mysql_client.exec_run('''
        mysql --protocol tcp -h {host} -P {port} default -u default --password=123
        -e "CREATE DATABASE x;"
        -e "USE x;"
        -e "CREATE TABLE table1 (column UInt32) ENGINE = Memory;"
        -e "INSERT INTO table1 VALUES (0), (1), (5);"
        -e "INSERT INTO table1 VALUES (0), (1), (5);"
        -e "SELECT * FROM table1 ORDER BY column;"
        -e "DROP DATABASE x;"
        -e "CREATE TEMPORARY TABLE tmp (tmp_column UInt32);"
        -e "INSERT INTO tmp VALUES (0), (1);"
        -e "SELECT * FROM tmp ORDER BY tmp_column;"
    '''.format(host=server_address, port=server_port), demux=True)

    assert stdout == '\n'.join(['column', '0', '0', '1', '1', '5', '5', 'tmp_column', '0', '1', ''])

def test_mysql_client_exception(mysql_client, server_address):
   # Poco exception.
    code, (stdout, stderr) = mysql_client.exec_run('''
        mysql --protocol tcp -h {host} -P {port} default -u default --password=123
        -e "CREATE TABLE default.t1_remote_mysql AS mysql('127.0.0.1:10086','default','t1_local','default','');"
    '''.format(host=server_address, port=server_port), demux=True)

    assert stderr[0:266] == "mysql: [Warning] Using a password on the command line interface can be insecure.\n" \
            "ERROR 1000 (00000) at line 1: Poco::Exception. Code: 1000, e.code() = 2002, e.displayText() = mysqlxx::ConnectionFailed: Can't connect to MySQL server on '127.0.0.1' (115) ((nullptr):0)"


def test_mysql_replacement_query(mysql_client, server_address):
    # SHOW TABLE STATUS LIKE.
    code, (stdout, stderr) = mysql_client.exec_run('''
        mysql --protocol tcp -h {host} -P {port} default -u default
        --password=123 -e "show table status like 'xx';"
    '''.format(host=server_address, port=server_port), demux=True)
    assert code == 0

    # SHOW VARIABLES.
    code, (stdout, stderr) = mysql_client.exec_run('''
        mysql --protocol tcp -h {host} -P {port} default -u default
        --password=123 -e "show variables;"
    '''.format(host=server_address, port=server_port), demux=True)
    assert code == 0

    # KILL QUERY.
    code, (stdout, stderr) = mysql_client.exec_run('''
        mysql --protocol tcp -h {host} -P {port} default -u default
        --password=123 -e "kill query 0;"
    '''.format(host=server_address, port=server_port), demux=True)
    assert code == 0

    code, (stdout, stderr) = mysql_client.exec_run('''
        mysql --protocol tcp -h {host} -P {port} default -u default
        --password=123 -e "kill query where query_id='mysql:0';"
    '''.format(host=server_address, port=server_port), demux=True)
    assert code == 0

    # SELECT DATABASE().
    code, (stdout, stderr) = mysql_client.exec_run('''
        mysql --protocol tcp -h {host} -P {port} default -u default
        --password=123 -e "select database();"
    '''.format(host=server_address, port=server_port), demux=True)
    assert code == 0
    assert stdout == 'database()\ndefault\n'

    code, (stdout, stderr) = mysql_client.exec_run('''
        mysql --protocol tcp -h {host} -P {port} default -u default
        --password=123 -e "select DATABASE();"
    '''.format(host=server_address, port=server_port), demux=True)
    assert code == 0
    assert stdout == 'DATABASE()\ndefault\n'


def test_mysql_explain(mysql_client, server_address):
    # EXPLAIN SELECT 1
    code, (stdout, stderr) = mysql_client.exec_run('''
        mysql --protocol tcp -h {host} -P {port} default -u default --password=123
        -e "EXPLAIN SELECT 1;"
    '''.format(host=server_address, port=server_port), demux=True)
    assert code == 0

    # EXPLAIN AST SELECT 1
    code, (stdout, stderr) = mysql_client.exec_run('''
        mysql --protocol tcp -h {host} -P {port} default -u default --password=123
        -e "EXPLAIN AST SELECT 1;"
    '''.format(host=server_address, port=server_port), demux=True)
    assert code == 0

    # EXPLAIN PLAN SELECT 1
    code, (stdout, stderr) = mysql_client.exec_run('''
        mysql --protocol tcp -h {host} -P {port} default -u default --password=123
        -e "EXPLAIN PLAN SELECT 1;"
    '''.format(host=server_address, port=server_port), demux=True)
    assert code == 0

    # EXPLAIN PIPELINE graph=1 SELECT 1
    code, (stdout, stderr) = mysql_client.exec_run('''
        mysql --protocol tcp -h {host} -P {port} default -u default --password=123
        -e "EXPLAIN PIPELINE graph=1 SELECT 1;"
    '''.format(host=server_address, port=server_port), demux=True)
    assert code == 0


def test_mysql_federated(mysql_server, server_address):
    # For some reason it occasionally fails without retries.
    retries = 100
    for try_num in range(retries):
        node.query('''DROP DATABASE IF EXISTS mysql_federated''', settings={"password": "123"})
        node.query('''CREATE DATABASE mysql_federated''', settings={"password": "123"})
        node.query('''CREATE TABLE mysql_federated.test (col UInt32) ENGINE = Log''', settings={"password": "123"})
        node.query('''INSERT INTO mysql_federated.test VALUES (0), (1), (5)''', settings={"password": "123"})

        code, (stdout, stderr) = mysql_server.exec_run('''
            mysql
            -e "DROP SERVER IF EXISTS clickhouse;"
            -e "CREATE SERVER clickhouse FOREIGN DATA WRAPPER mysql
            OPTIONS (USER 'default', PASSWORD '123', HOST '{host}', PORT {port}, DATABASE 'mysql_federated');"
            -e "DROP DATABASE IF EXISTS mysql_federated;"
            -e "CREATE DATABASE mysql_federated;"
        '''.format(host=server_address, port=server_port), demux=True)

        if code != 0:
            print("stdout", stdout)
            print("stderr", stderr)
            if try_num + 1 < retries and "Can't connect to local MySQL server through socket" in stderr:
                time.sleep(1)
                continue
        assert code == 0

        code, (stdout, stderr) = mysql_server.exec_run('''
            mysql
            -e "CREATE TABLE mysql_federated.test(`col` int UNSIGNED) ENGINE=FEDERATED CONNECTION='clickhouse';"
            -e "SELECT * FROM mysql_federated.test ORDER BY col;"
        '''.format(host=server_address, port=server_port), demux=True)

        if code != 0:
            print("stdout", stdout)
            print("stderr", stderr)
            if try_num + 1 < retries and "Can't connect to local MySQL server through socket" in stderr:
                time.sleep(1)
                continue
        assert code == 0

        assert stdout == '\n'.join(['col', '0', '1', '5', ''])

        code, (stdout, stderr) = mysql_server.exec_run('''
            mysql
            -e "INSERT INTO mysql_federated.test VALUES (0), (1), (5);"
            -e "SELECT * FROM mysql_federated.test ORDER BY col;"
        '''.format(host=server_address, port=server_port), demux=True)

        if code != 0:
            print("stdout", stdout)
            print("stderr", stderr)
            if try_num + 1 < retries and "Can't connect to local MySQL server through socket" in stderr:
                time.sleep(1)
                continue
        assert code == 0

        assert stdout == '\n'.join(['col', '0', '0', '1', '1', '5', '5', ''])


def test_python_client(server_address):
    client = pymysql.connections.Connection(host=server_address, user='user_with_double_sha1', password='abacaba', database='default', port=server_port)

    with pytest.raises(pymysql.InternalError) as exc_info:
        client.query('select name from tables')

    assert exc_info.value.args[1][0:77] == "Code: 60, e.displayText() = DB::Exception: Table default.tables doesn't exist"

    cursor = client.cursor(pymysql.cursors.DictCursor)
    cursor.execute("select 1 as a, 'тест' as b")
    assert cursor.fetchall() == [{'a': 1, 'b': 'тест'}]

    with pytest.raises(pymysql.InternalError) as exc_info:
        pymysql.connections.Connection(host=server_address, user='default', password='abacab', database='default', port=server_port)

    assert exc_info.value.args == (516, 'default: Authentication failed: password is incorrect or there is no user with such name')

    client = pymysql.connections.Connection(host=server_address, user='default', password='123', database='default', port=server_port)

    with pytest.raises(pymysql.InternalError) as exc_info:
        client.query('select name from tables')

    assert exc_info.value.args[1][0:77] == "Code: 60, e.displayText() = DB::Exception: Table default.tables doesn't exist"

    cursor = client.cursor(pymysql.cursors.DictCursor)
    cursor.execute("select 1 as a, 'тест' as b")
    assert cursor.fetchall() == [{'a': 1, 'b': 'тест'}]

    client.select_db('system')

    with pytest.raises(pymysql.InternalError) as exc_info:
        client.select_db('system2')

    assert exc_info.value.args[1][0:73] == "Code: 81, e.displayText() = DB::Exception: Database system2 doesn't exist"

    cursor = client.cursor(pymysql.cursors.DictCursor)
    cursor.execute('CREATE DATABASE x')
    client.select_db('x')
    cursor.execute("CREATE TABLE table1 (a UInt32) ENGINE = Memory")
    cursor.execute("INSERT INTO table1 VALUES (1), (3)")
    cursor.execute("INSERT INTO table1 VALUES (1), (4)")
    cursor.execute("SELECT * FROM table1 ORDER BY a")
    assert cursor.fetchall() == [{'a': 1}, {'a': 1}, {'a': 3}, {'a': 4}]


def test_golang_client(server_address, golang_container):
    # type: (str, Container) -> None
    with open(os.path.join(SCRIPT_DIR,'golang.reference')) as fp:
        reference = fp.read()

    code, (stdout, stderr) = golang_container.exec_run('./main --host {host} --port {port} --user default --password 123 --database '
                                                       'abc'.format(host=server_address, port=server_port), demux=True)

    assert code == 1
    assert stderr == "Error 81: Database abc doesn't exist\n"

    code, (stdout, stderr) = golang_container.exec_run('./main --host {host} --port {port} --user default --password 123 --database '
                                                       'default'.format(host=server_address, port=server_port), demux=True)

    assert code == 0
    assert stdout == reference

    code, (stdout, stderr) = golang_container.exec_run('./main --host {host} --port {port} --user user_with_double_sha1 --password abacaba --database '
                                                       'default'.format(host=server_address, port=server_port), demux=True)
    assert code == 0
    assert stdout == reference


def test_php_client(server_address, php_container):
    # type: (str, Container) -> None
    code, (stdout, stderr) = php_container.exec_run('php -f test.php {host} {port} default 123'.format(host=server_address, port=server_port), demux=True)
    assert code == 0
    assert stdout == 'tables\n'

    code, (stdout, stderr) = php_container.exec_run('php -f test_ssl.php {host} {port} default 123'.format(host=server_address, port=server_port), demux=True)
    assert code == 0
    assert stdout == 'tables\n'

    code, (stdout, stderr) = php_container.exec_run('php -f test.php {host} {port} user_with_double_sha1 abacaba'.format(host=server_address, port=server_port), demux=True)
    assert code == 0
    assert stdout == 'tables\n'

    code, (stdout, stderr) = php_container.exec_run('php -f test_ssl.php {host} {port} user_with_double_sha1 abacaba'.format(host=server_address, port=server_port), demux=True)
    assert code == 0
    assert stdout == 'tables\n'


def test_mysqljs_client(server_address, nodejs_container):
    code, (_, stderr) = nodejs_container.exec_run('node test.js {host} {port} user_with_sha256 abacaba'.format(host=server_address, port=server_port), demux=True)
    assert code == 1
    assert 'MySQL is requesting the sha256_password authentication method, which is not supported.' in stderr

    code, (_, stderr) = nodejs_container.exec_run('node test.js {host} {port} user_with_empty_password ""'.format(host=server_address, port=server_port), demux=True)
    assert code == 0

    code, (_, _) = nodejs_container.exec_run('node test.js {host} {port} user_with_double_sha1 abacaba'.format(host=server_address, port=server_port), demux=True)
    assert code == 0

    code, (_, _) = nodejs_container.exec_run('node test.js {host} {port} user_with_empty_password 123'.format(host=server_address, port=server_port), demux=True)
    assert code == 1


def test_java_client(server_address, java_container):
    # type: (str, Container) -> None
    with open(os.path.join(SCRIPT_DIR, 'java.reference')) as fp:
        reference = fp.read()

    # database not exists exception.
    code, (stdout, stderr) = java_container.exec_run('java JavaConnectorTest --host {host} --port {port} --user user_with_empty_password --database '
                                                       'abc'.format(host=server_address, port=server_port), demux=True)
    assert code == 1

    # empty password passed.
    code, (stdout, stderr) = java_container.exec_run('java JavaConnectorTest --host {host} --port {port} --user user_with_empty_password --database '
                                                       'default'.format(host=server_address, port=server_port), demux=True)
    assert code == 0
    assert stdout == reference

    # non-empty password passed.
    code, (stdout, stderr) = java_container.exec_run('java JavaConnectorTest --host {host} --port {port} --user default --password 123 --database '
                                                       'default'.format(host=server_address, port=server_port), demux=True)
    assert code == 0
    assert stdout == reference

    # double-sha1 password passed.
    code, (stdout, stderr) = java_container.exec_run('java JavaConnectorTest --host {host} --port {port} --user user_with_double_sha1 --password abacaba  --database '
                                                       'default'.format(host=server_address, port=server_port), demux=True)
    assert code == 0
    assert stdout == reference


def test_types(server_address):
    client = pymysql.connections.Connection(host=server_address, user='default', password='123', database='default', port=server_port)

    cursor = client.cursor(pymysql.cursors.DictCursor)
    cursor.execute(
        "select "
        "toInt8(-pow(2, 7)) as Int8_column, "
        "toUInt8(pow(2, 8) - 1) as UInt8_column, "
        "toInt16(-pow(2, 15)) as Int16_column, "
        "toUInt16(pow(2, 16) - 1) as UInt16_column, "
        "toInt32(-pow(2, 31)) as Int32_column, "
        "toUInt32(pow(2, 32) - 1) as UInt32_column, "
        "toInt64('-9223372036854775808') as Int64_column, "  # -2^63
        "toUInt64('18446744073709551615') as UInt64_column, "  # 2^64 - 1
        "'тест' as String_column, "
        "toFixedString('тест', 8) as FixedString_column, "
        "toFloat32(1.5) as Float32_column, "
        "toFloat64(1.5) as Float64_column, "
        "toFloat32(NaN) as Float32_NaN_column, "
        "-Inf as Float64_Inf_column, "
        "toDate('2019-12-08') as Date_column, "
        "toDate('1970-01-01') as Date_min_column, "
        "toDate('1970-01-02') as Date_after_min_column, "
        "toDateTime('2019-12-08 08:24:03') as DateTime_column"
    )

    result = cursor.fetchall()[0]
    expected = [
        ('Int8_column', -2 ** 7),
        ('UInt8_column', 2 ** 8 - 1),
        ('Int16_column', -2 ** 15),
        ('UInt16_column', 2 ** 16 - 1),
        ('Int32_column', -2 ** 31),
        ('UInt32_column', 2 ** 32 - 1),
        ('Int64_column', -2 ** 63),
        ('UInt64_column', 2 ** 64 - 1),
        ('String_column', 'тест'),
        ('FixedString_column', 'тест'),
        ('Float32_column', 1.5),
        ('Float64_column', 1.5),
        ('Float32_NaN_column', float('nan')),
        ('Float64_Inf_column', float('-inf')),
        ('Date_column', datetime.date(2019, 12, 8)),
        ('Date_min_column', datetime.date(1970, 1, 1)),
        ('Date_after_min_column', datetime.date(1970, 1, 2)),
        ('DateTime_column', datetime.datetime(2019, 12, 8, 8, 24, 3)),
    ]

    for key, value in expected:
        if isinstance(value, float) and math.isnan(value):
            assert math.isnan(result[key])
        else:
            assert result[key] == value