from __future__ import annotations

from typing import Dict, List
from ..schema import SignalNode


class PriceFeedAdapter:
    """Toy price feed adapter that exposes SignalNode objects."""

    def __init__(self, feed_name: str = "toy-price-feed") -> None:
        self.feed_name = feed_name

    def to_signal(self, asset: str, venue: str, price: float, ts: int) -> SignalNode:
        return SignalNode(
            asset=asset,
            venue=venue,
            signal_type="price",
            timestamp=ts,
            quality=1.0,
            metadata={"feed": self.feed_name, "price": price},
        )