from typing import Dict, Optional

class Calculator:
    """손익 계산 클래스"""
    
    @staticmethod
    def calc_pnl(
        gold_buy_price: float,
        gold_quantity: float,
        btc_buy_price: float,
        btc_quantity: float,
        current_gold: Optional[float],
        current_btc: Optional[float]
    ) -> Dict:
        """
        금과 BTC의 손익 계산
        
        Returns:
            {
                "금손익": float,
                "금손익%": float,
                "BTC손익": float,
                "BTC손익%": float,
                "총손익": float,
                "총손익%": float
            }
        """
        result = {
            "금손익": 0.0,
            "금손익%": 0.0,
            "BTC손익": 0.0,
            "BTC손익%": 0.0,
            "총손익": 0.0,
            "총손익%": 0.0
        }
        
        # 금 손익 계산
        if current_gold:
            cost_gold = gold_buy_price * gold_quantity
            pnl_gold = gold_quantity * (float(current_gold) - gold_buy_price)
            result["금손익"] = round(pnl_gold, 0)
            if cost_gold > 0:
                result["금손익%"] = round((pnl_gold / cost_gold * 100), 2)
        
        # BTC 손익 계산
        if current_btc:
            cost_btc = btc_buy_price * btc_quantity
            pnl_btc = btc_quantity * (float(current_btc) - btc_buy_price)
            result["BTC손익"] = round(pnl_btc, 0)
            if cost_btc > 0:
                result["BTC손익%"] = round((pnl_btc / cost_btc * 100), 2)
        
        # 총 손익 계산
        result["총손익"] = result["금손익"] + result["BTC손익"]
        total_cost = (gold_buy_price * gold_quantity) + (btc_buy_price * btc_quantity)
        if total_cost > 0:
            result["총손익%"] = round((result["총손익"] / total_cost * 100), 2)
        
        return result