"""module contains all db related stuff"""
from typing import Tuple
from urllib.parse import urlparse
import MySQLdb as mdb
from gn3.settings import SQL_URI


def parse_db_url() -> Tuple:
    """function to parse SQL_URI env variable note:there\
    is a default value for SQL_URI so a tuple result is\
    always expected"""
    parsed_db = urlparse(SQL_URI)
    return (
        parsed_db.hostname, parsed_db.username, parsed_db.password,
        parsed_db.path[1:], parsed_db.port)


def database_connector() -> mdb.Connection:
    """function to create db connector"""
    host, user, passwd, db_name, db_port = parse_db_url()

    return mdb.connect(host, user, passwd, db_name, port=(db_port or 3306))