from __future__ import annotations

from dataclasses import dataclass, field
from typing import NewType, Optional

from domain.postcode import Postcode


def _empty_source_row() -> dict[str, str]:
    return {}


@dataclass(frozen=True)
class StandardisedAddress:
    address: str
    postcode: Postcode
    org_reference: Optional[str] = None


# Standardised Asset List -- the cleaned output counterpart to AddressList.
SAL = NewType("SAL", list[StandardisedAddress])