"""Repository protocol для хранения FinancialModel.

Определяет контракт: load(path) -> FinancialModel, save(model, path) -> None.
Реализации: JsonFileRepository, ExcelRepository.
"""
from __future__ import annotations

from pathlib import Path
from typing import Protocol, runtime_checkable

from domain import FinancialModel


@runtime_checkable
class ModelRepository(Protocol):
    """Любой storage, способный прочитать и записать FinancialModel."""

    def load(self, path: str | Path) -> FinancialModel: ...

    def save(self, model: FinancialModel, path: str | Path) -> None: ...