from __future__ import annotations

from app.config import Settings
from app.market.base import MarketData
from app.market.binance import BinanceMarketData
from app.market.fake import FakeMarketData


def build_market_data(settings: Settings) -> MarketData:
    exchange = settings.exchange.lower()
    if exchange in {"binance", "binanceus"}:
        return BinanceMarketData()
    raise ValueError(f"unsupported exchange: {settings.exchange}")


__all__ = ["FakeMarketData", "MarketData", "build_market_data"]