from __future__ import annotations

"""Toy price-feed adapter.
This adapter simulates receiving quotes from an exchange and exposes a simple
interface that the ArbSphere coordinator can consume.
"""

from typing import Dict, Any, List
import time


class PriceFeedAdapter:
    def __init__(self, source: str = "mock-exchange") -> None:
        self.source = source
        self._tick = 0

    def poll(self) -> Dict[str, Any]:
        # deterministic synthetic data
        self._tick += 1
        now = time.time()
        price = 100.0 + (self._tick % 5)  # simple wobble
        return {
            "source": self.source,
            "ts": now,
            "price": price,
            "bid": price - 0.05,
            "ask": price + 0.05,
        }

    def as_series(self, n: int = 10) -> List[Dict[str, Any]]:
        return [self.poll() for _ in range(n)]