# -*- coding: utf-8 -*-

import datetime
import decimal
import os
import sys
import time
import uuid

import docker
import psycopg2 as py_psql
import psycopg2.extras
import pytest
from helpers.cluster import ClickHouseCluster, get_docker_compose_path, run_and_check

psycopg2.extras.register_uuid()

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

cluster = ClickHouseCluster(__file__)
node = cluster.add_instance(
    "node",
    main_configs=[
        "configs/postresql.xml",
        "configs/log.xml",
        "configs/ssl_conf.xml",
        "configs/dhparam.pem",
        "configs/server.crt",
        "configs/server.key",
    ],
    user_configs=["configs/default_passwd.xml"],
    env_variables={"UBSAN_OPTIONS": "print_stacktrace=1"},
)

server_port = 5433


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


@pytest.fixture(scope="module")
def psql_client():
    docker_compose = os.path.join(DOCKER_COMPOSE_PATH, "docker_compose_postgresql.yml")
    run_and_check(
        [
            "docker-compose",
            "-p",
            cluster.project_name,
            "-f",
            docker_compose,
            "up",
            "--force-recreate",
            "-d",
            "--build",
        ]
    )
    yield docker.DockerClient(
        base_url="unix:///var/run/docker.sock",
        version=cluster.docker_api_version,
        timeout=600,
    ).containers.get(cluster.project_name + "_psql_1")


@pytest.fixture(scope="module")
def psql_server(psql_client):
    """Return PostgreSQL container when it is healthy."""
    retries = 30
    for i in range(retries):
        info = psql_client.client.api.inspect_container(psql_client.name)
        if info["State"]["Health"]["Status"] == "healthy":
            break
        time.sleep(1)
    else:
        print(info["State"])
        raise Exception(
            "PostgreSQL server has not started after {} retries.".format(retries)
        )

    return psql_client


@pytest.fixture(scope="module")
def java_container():
    docker_compose = os.path.join(
        DOCKER_COMPOSE_PATH, "docker_compose_postgresql_java_client.yml"
    )
    run_and_check(
        [
            "docker-compose",
            "-p",
            cluster.project_name,
            "-f",
            docker_compose,
            "up",
            "--force-recreate",
            "-d",
            "--build",
        ]
    )
    yield docker.DockerClient(
        base_url="unix:///var/run/docker.sock",
        version=cluster.docker_api_version,
        timeout=600,
    ).containers.get(cluster.project_name + "_java_1")


def test_psql_is_ready(psql_server):
    pass


def test_psql_client(psql_client, server_address):
    cmd_prefix = 'psql "sslmode=require host={server_address} port={server_port} user=default dbname=default password=123" '.format(
        server_address=server_address, server_port=server_port
    )
    cmd_prefix += "--no-align --field-separator=' ' "

    code, (stdout, stderr) = psql_client.exec_run(
        cmd_prefix + '-c "SELECT 1 as a"', demux=True
    )
    assert stdout.decode() == "\n".join(["a", "1", "(1 row)", ""])

    code, (stdout, stderr) = psql_client.exec_run(
        cmd_prefix + '''-c "SELECT 'колонка' as a"''', demux=True
    )
    assert stdout.decode() == "\n".join(["a", "колонка", "(1 row)", ""])

    code, (stdout, stderr) = psql_client.exec_run(
        cmd_prefix
        + "-c "
        + """
        "CREATE DATABASE x;
        USE x;
        CREATE TABLE table1 (column UInt32) ENGINE = Memory;
        INSERT INTO table1 VALUES (0), (1), (5);
        INSERT INTO table1 VALUES (0), (1), (5);
        SELECT * FROM table1 ORDER BY column;"
        """,
        demux=True,
    )
    assert stdout.decode() == "\n".join(
        ["column", "0", "0", "1", "1", "5", "5", "(6 rows)", ""]
    )

    code, (stdout, stderr) = psql_client.exec_run(
        cmd_prefix
        + "-c "
        + """
        "DROP DATABASE x;
        CREATE TEMPORARY TABLE tmp (tmp_column UInt32);
        INSERT INTO tmp VALUES (0), (1);
        SELECT * FROM tmp ORDER BY tmp_column;"
        """,
        demux=True,
    )
    assert stdout.decode() == "\n".join(["tmp_column", "0", "1", "(2 rows)", ""])


def test_python_client(server_address):
    with pytest.raises(py_psql.InternalError) as exc_info:
        ch = py_psql.connect(
            host=server_address,
            port=server_port,
            user="default",
            password="123",
            database="",
        )
        cur = ch.cursor()
        cur.execute("select name from tables;")

    assert exc_info.value.args == (
        "Query execution failed.\nDB::Exception: Table default.tables doesn't exist\nSSL connection has been closed unexpectedly\n",
    )

    ch = py_psql.connect(
        host=server_address,
        port=server_port,
        user="default",
        password="123",
        database="",
    )
    cur = ch.cursor()

    cur.execute("select 1 as a, 2 as b")
    assert (cur.description[0].name, cur.description[1].name) == ("a", "b")
    assert cur.fetchall() == [(1, 2)]

    cur.execute("CREATE DATABASE x")
    cur.execute("USE x")
    cur.execute(
        "CREATE TEMPORARY TABLE tmp2 (ch Int8, i64 Int64, f64 Float64, str String, date Date, dec Decimal(19, 10), uuid UUID) ENGINE = Memory"
    )
    cur.execute(
        "insert into tmp2 (ch, i64, f64, str, date, dec, uuid) values (44, 534324234, 0.32423423, 'hello', '2019-01-23', 0.333333, '61f0c404-5cb3-11e7-907b-a6006ad3dba0')"
    )
    cur.execute("select * from tmp2")
    assert cur.fetchall()[0] == (
        "44",
        534324234,
        0.32423423,
        "hello",
        datetime.date(2019, 1, 23),
        decimal.Decimal("0.3333330000"),
        uuid.UUID("61f0c404-5cb3-11e7-907b-a6006ad3dba0"),
    )


def test_java_client(server_address, java_container):
    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 default --database "
        "abc".format(host=server_address, port=server_port),
        demux=True,
    )
    assert code == 1

    # 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,
    )
    print(stdout, stderr, file=sys.stderr)
    assert code == 0
    assert stdout.decode() == reference