from __future__ import annotations
import time

from deltaforge_mvp.core import Asset, MarketSignal


def generate_signal(underlying: str, strike: float, expiry: str, price: float, timestamp: float | None = None) -> MarketSignal:
    """Tiny options feed adapter: returns a MarketSignal for an option asset."""
    a = Asset(type="option", underlying=underlying, strike=strike, expires=expiry, symbol=None)
    ts = timestamp if timestamp is not None else time.time()
    return MarketSignal(asset=a, price=price, volatility=0.25, liquidity=1.0, timestamp=ts)


class OptionsFeedAdapter:
    """Lightweight adapter wrapper to expose a stable interface used by tests."""
    def __init__(self, name: str = "options"):
        self.name = name

    def get_signal(self, underlying: str, strike: float, expiry: str, price: float, timestamp: float | None = None) -> MarketSignal:
        return generate_signal(underlying, strike, expiry, price, timestamp)