# License LGPL-3.0 or later (http://www.gnu.org/licenses/lgpl.html).

from odoo import tools
from odoo.sql_db import Connection, ConnectionPool, _Pool  # noqa


def connection_info_for_external_database():
    db_name = tools.config.get("external_db_name")
    connection_info = {"database": db_name}
    for p in ("host", "port", "user", "password"):
        cfg = tools.config.get("external_db_" + p)
        if cfg:
            connection_info[p] = cfg
    return db_name, connection_info


def get_external_cursor():
    global _Pool
    if _Pool is None:
        _Pool = ConnectionPool(int(tools.config["db_maxconn"]))
    db, info = connection_info_for_external_database()
    return Connection(_Pool, db, info).cursor()