"""Gather information from Plesk via DB querries.
"""

import logging
import re
from collections import defaultdict
from typing import Dict, List, Sequence

from defence360agent.utils import CheckRunError, check_run, retry_on
from defence360agent.subsys.panels.base import PanelException

logger = logging.getLogger(__name__)


async def raise_panel_exception(*args, **kwargs):
    raise PanelException(*args, **kwargs)


@retry_on(CheckRunError, max_tries=3, on_error=raise_panel_exception)
async def _run_query(query):
    return (await check_run(["plesk", "db", "-N", "-e", query])).decode()


async def get_user_to_domain() -> Dict[str, List[str]]:
    """Return mapping: user -> user's domains."""

    result = (
        await _run_query(
            "select login, name from domains "
            "   left join hosting on dom_id = domains.id "
            "   right join sys_users on hosting.sys_user_id = sys_users.id"
        )
    ).split()
    result_mapping = defaultdict(list)
    for user, domain in zip(result[0::2], result[1::2]):
        if domain != "NULL":
            result_mapping[user].append(domain)
    return result_mapping


async def get_domain_to_user() -> Dict[str, List[str]]:
    """Return mapping: domain -> user."""

    result = (
        await _run_query(
            "select name, login "
            "from domains "
            "   left join hosting on dom_id = domains.id "
            "   left join sys_users on hosting.sys_user_id = sys_users.id"
        )
    ).split()
    return {domain: [user] for domain, user in zip(result[0::2], result[1::2])}


async def get_user_details() -> Dict[str, Dict[str, str]]:
    """
    Returns dict with user to email and locale pairs

    Not used, because MyImunify implemented for cPanel only yet
    """
    user_details = {}

    results = await _run_query(
        "SELECT CONCAT(login, ';',email, ';',locale) FROM clients;"
    )
    for record in results.split("\n"):
        if not record:
            continue
        user, email, locale = record.split(";")
        user_details[user] = {
            "email": email,
            "locale": locale.replace("-", "_"),
        }

    return user_details


async def get_domains() -> List[str]:
    """Return: list of domains"""

    return (await _run_query("select name from domains")).split()


async def get_users() -> List[str]:
    """Return: users that created by Plesk"""

    return (
        await _run_query(
            "SELECT sys_users.login FROM sys_users JOIN hosting ON"
            " hosting.sys_user_id=sys_users.id JOIN domains ON"
            " hosting.dom_id=domains.id AND domains.webspace_id=0"
        )
    ).split()


async def count_customers_with_subscriptions() -> int:  # pragma: no cover
    """Return: count active customers with at least one (any) domain"""

    return int(
        await _run_query(
            "select count(distinct cl_id) from clients c join domains d on "
            "d.cl_id = c.id where c.status = 0"
        )
    )


async def get_admin_emails() -> list:
    emails = await _run_query("SELECT email FROM clients WHERE type='admin';")
    return [email for email in emails.split("\n") if email]


async def list_docroots() -> Sequence[str]:
    query = "SELECT DISTINCT hosting.www_root FROM hosting;"
    return (await _run_query(query)).split()


async def list_docroots_domains_users():
    sql = (
        "select hosting.www_root, domains.name, sys_users.login"
        " from hosting"
        " inner join domains on hosting.dom_id = domains.id"
        " inner join sys_users on hosting.sys_user_id=sys_users.id"
    )
    data = await _run_query(sql)
    retval = [string.split() for string in data.split("\n") if string]
    return retval