"""Trading pair configuration and helpers."""

from dataclasses import dataclass
from typing import List


@dataclass
class TradingPairConfig:
    """Configuration for a single trading pair."""

    symbol: str
    min_order_size: float = 0.0
    max_leverage: int = 3
    enabled: bool = True


# Default pairs for MVP (Phase 1)
DEFAULT_PAIRS: List[TradingPairConfig] = [
    TradingPairConfig(symbol="BTC/USDT", min_order_size=0.001),
    TradingPairConfig(symbol="ETH/USDT", min_order_size=0.01),
]


def get_enabled_pairs(pairs: List[TradingPairConfig] | None = None) -> List[str]:
    """Return list of enabled symbol strings."""
    source = pairs or DEFAULT_PAIRS
    return [p.symbol for p in source if p.enabled]