"""Risk calculator."""

from typing import Any, Optional, List
from datetime import date
from qfinlib.market.container import MarketContainer
from qfinlib.instruments.base import Instrument
from qfinlib.portfolio.portfolio import Portfolio


class RiskCalculator:
    """Calculates risk metrics for instruments and portfolios."""

    def __init__(self, market: MarketContainer):
        """Initialize with market data."""
        self.market = market

    def pv(self, instrument: Instrument, as_of: Optional[date] = None) -> float:
        """Calculate present value."""
        # Placeholder - actual implementation would use pricing engine
        return 0.0

    def dv01(self, instrument: Instrument, as_of: Optional[date] = None) -> float:
        """Calculate DV01."""
        # Placeholder - actual implementation would calculate DV01
        return 0.0

    def scenario_analysis(
        self, instrument: Instrument, shifts: List[int], as_of: Optional[date] = None
    ) -> dict[str, Any]:
        """Perform scenario analysis."""
        # Placeholder - actual implementation would run scenarios
        return {}

    def portfolio_risk(self, portfolio: Portfolio, as_of: Optional[date] = None) -> dict[str, Any]:
        """Calculate portfolio-level risk."""
        # Placeholder - actual implementation would aggregate risks
        return {}
