from __future__ import annotations

from abc import ABC, abstractmethod
from dataclasses import dataclass

from app.models.portfolio import LombardPortfolio


@dataclass(frozen=True)
class StrategyConfig:
    """Common research inputs used by all strategy implementations."""

    portfolio: LombardPortfolio
    spot_price: float
    volatility: float
    risk_free_rate: float


class BaseStrategy(ABC):
    """Abstract strategy interface for paper-based hedge analysis."""

    def __init__(self, config: StrategyConfig) -> None:
        self.config = config

    @property
    @abstractmethod
    def name(self) -> str:  # pragma: no cover - interface only
        raise NotImplementedError

    @abstractmethod
    def calculate_cost(self) -> dict:
        raise NotImplementedError

    @abstractmethod
    def calculate_protection(self) -> dict:
        raise NotImplementedError

    @abstractmethod
    def get_scenarios(self) -> list[dict]:
        raise NotImplementedError