## Copyright © 2026 Olaf Kolkman
## SPDX-License-Identifier: GPL-3.0-or-later

from datetime import datetime, timedelta, timezone
from hashlib import sha256

from backend.app.core.config import settings


def hash_token(token: str) -> str:
    return sha256(token.encode('utf-8')).hexdigest()


def token_expires_at() -> datetime:
    return datetime.now(timezone.utc) + timedelta(days=settings.token_expiry_days)


def clean_url(url: str) -> str:
    from urllib.parse import parse_qsl, urlsplit, urlunsplit

    parts = urlsplit(url)
    if not parts.query:
        return url

    params = parse_qsl(parts.query, keep_blank_values=True)
    filtered = [(k, v) for k, v in params if k not in settings.tracking_params]
    new_query = '&'.join(f'{k}={v}' if v != '' else k for k, v in filtered)
    return urlunsplit((parts.scheme, parts.netloc, parts.path, new_query, parts.fragment))