from __future__ import annotations
import time
from typing import List
from ..dsl import Asset, MarketSignal

class OptionsFeedAdapter:
    """
    Starter options feed adapter (toy).
    """
    def __init__(self, symbol: str = "AAPL-20260120-150C"):
        self.asset = Asset(id="opt-"+symbol, type="option", symbol=symbol)
        self.start = time.time()

    def poll_signals(self) -> List[MarketSignal]:
        t = time.time() - self.start
        price = 5.0 + (t % 1.5)
        return [MarketSignal(asset=self.asset, timestamp=t, price=price, liquidity=1.0)]