import contextlib
import os
import subprocess
import time

import pymysql.cursors
import pytest

from helpers.client import QueryRuntimeException
from helpers.cluster import ClickHouseCluster, get_docker_compose_path
from helpers.network import PartitionManager

cluster = ClickHouseCluster(__file__)
clickhouse_node = cluster.add_instance(
    "node1", main_configs=["configs/remote_servers.xml"], with_mysql8=True
)


@pytest.fixture(scope="module")
def started_cluster():
    try:
        cluster.start()
        yield cluster
    finally:
        cluster.shutdown()


class MySQLNodeInstance:
    def __init__(self, started_cluster, user="root", password="clickhouse"):
        self.user = user
        self.port = cluster.mysql8_port
        self.hostname = cluster.mysql8_ip
        self.password = password
        self.mysql_connection = None  # lazy init

    def alloc_connection(self):
        if self.mysql_connection is None:
            self.mysql_connection = pymysql.connect(
                user=self.user,
                password=self.password,
                host=self.hostname,
                port=self.port,
                autocommit=True,
            )
        return self.mysql_connection

    def query(self, execution_query):
        with self.alloc_connection().cursor() as cursor:
            cursor.execute(execution_query)

    def close(self):
        if self.mysql_connection is not None:
            self.mysql_connection.close()


def test_disabled_mysql_server(started_cluster):
    with contextlib.closing(MySQLNodeInstance(started_cluster)) as mysql_node:
        mysql_node.query("DROP DATABASE IF EXISTS test_db_disabled;")
        mysql_node.query("CREATE DATABASE test_db_disabled;")
        mysql_node.query(
            "CREATE TABLE test_db_disabled.test_table ( `id` int(11) NOT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB;"
        )

    with PartitionManager() as pm:
        clickhouse_node.query(
            "CREATE DATABASE test_db_disabled ENGINE = MySQL('mysql80:3306', 'test_db_disabled', 'root', 'clickhouse')"
        )

        pm._add_rule(
            {
                "source": clickhouse_node.ip_address,
                "destination_port": 3306,
                "action": "DROP",
            }
        )
        clickhouse_node.query("SELECT * FROM system.parts")
        clickhouse_node.query("SELECT * FROM system.mutations")
        clickhouse_node.query("SELECT * FROM system.graphite_retentions")

        clickhouse_node.query("DROP DATABASE test_db_disabled")