from __future__ import annotations

from dataclasses import dataclass
from datetime import date
from typing import Iterable


@dataclass
class ExpenseRow:
    use_date: date
    description: str
    amount: int
    note: str
    source: str
    source_hash: str


class CSVParserBase:
    source: str = ''

    def detect(self, header_line: str) -> bool:
        raise NotImplementedError

    def parse(self, lines: Iterable[str]) -> list[ExpenseRow]:
        raise NotImplementedError