"""Local QR generation for printable inventory labels. No asset writes."""
from urllib.parse import urlsplit, urlunsplit

import qrcode
from qrcode.image.svg import SvgPathImage
from fastapi import HTTPException

LABEL_SIZES = {'62x40': (62, 40), '62x29': (62, 29), '89x36': (89, 36)}


def hardware_label_url(base_url: str, hardware_id: int) -> str:
    try:
        parts = urlsplit(base_url.strip())
    except ValueError as error:
        raise HTTPException(400, "Hub-adressen er ugyldig") from error
    if (parts.scheme not in {'http', 'https'} or not parts.hostname
            or parts.username or parts.password or parts.query or parts.fragment):
        raise HTTPException(400, 'Brug en http- eller https-adresse uden login, søgeparametre eller fragment.')
    return urlunsplit((parts.scheme, parts.netloc, parts.path.rstrip('/') + f'/hardware/{hardware_id}', '', ''))


def hardware_label_qr(url: str) -> str:
    qr = qrcode.QRCode(error_correction=qrcode.constants.ERROR_CORRECT_M, border=4)
    qr.add_data(url)
    qr.make(fit=True)
    return qr.make_image(image_factory=SvgPathImage).to_string().decode('utf-8')