"""High-level identification: match + canonical naming for one scanned disc."""
from . import iso_reader, matcher, namer


def identify(conn, record, prefer_region=None):
    """Return ``{method, release, serial, canonical}`` for a scanned disc record."""
    method, release = matcher.match(conn, record, prefer_region=prefer_region)
    return identify_with_release(record, release, method)


def identify_with_release(record, release, method):
    serial = record.get("serial")
    if not serial and release and iso_reader.looks_like_serial(release.get("serial")):
        serial = iso_reader.normalize_serial(release.get("serial"))
    canonical = namer.canonical_name(release, serial) if release else None
    return {"method": method, "release": release, "serial": serial, "canonical": canonical}