from __future__ import annotations

import datetime as dt

from dateutil import parser as date_parser


def parse_datetime(value: str | None) -> dt.datetime | None:
    if not value:
        return None
    try:
        return date_parser.parse(value)
    except (TypeError, ValueError, OverflowError):
        try:
            return date_parser.parse(value, fuzzy=True)
        except (TypeError, ValueError, OverflowError):
            return None


def normalize_date(value: str | None) -> str:
    parsed = parse_datetime(value)
    if parsed is None:
        return ""
    if parsed.tzinfo is None or parsed.utcoffset() is None:
        return parsed.strftime("%Y-%m-%d %H:%M:%S")
    return parsed.isoformat(sep=" ", timespec="seconds")