"""주문 실행 디스패처 — 국내/해외 공통 인터페이스.

trade_executor.py 의 is_domestic 분기를 여기서 캡슐화.
신규 시장(예: 일본, 홍콩) 추가 시 이 모듈만 수정.
"""
from __future__ import annotations

import logging
from typing import Protocol

from app.services.korea_investment_api import korea_investment_api

logger = logging.getLogger(__name__)


class OrderDispatcher(Protocol):
    """주문 실행 인터페이스."""

    async def place(
        self,
        stock_code: str,
        order_type: str,
        quantity: int,
        price: float,
    ) -> dict: ...

    async def get_execution(self, order_id: str) -> dict: ...

    def adjust_price(self, price: float, order_type: str) -> float: ...


class DomesticOrderDispatcher:
    """국내 주식 주문 실행."""

    async def place(
        self,
        stock_code: str,
        order_type: str,
        quantity: int,
        price: float,
        **_,
    ) -> dict:
        return await korea_investment_api.place_order(stock_code, order_type, quantity, price)

    async def get_execution(self, order_id: str) -> dict:
        return await korea_investment_api.get_order_execution(order_id, is_domestic=True)

    def adjust_price(self, price: float, order_type: str) -> float:
        """BUY +0.5% / SELL -0.5%, 원화 정수 반환."""
        adjusted = price * 1.005 if order_type == "BUY" else price * 0.995
        return float(int(adjusted))


class OverseasOrderDispatcher:
    """해외 주식 주문 실행."""

    def __init__(self, exchange_code: str = "NASD"):
        self.exchange_code = exchange_code

    async def place(
        self,
        stock_code: str,
        order_type: str,
        quantity: int,
        price: float,
        **_,
    ) -> dict:
        return await korea_investment_api.place_overseas_order(
            stock_code, order_type, quantity, float(price), self.exchange_code
        )

    async def get_execution(self, order_id: str) -> dict:
        # 해외 체결 조회 미지원 — 포트폴리오 동기화로 대체
        return {"filled_qty": 0, "filled_price": 0.0}

    def adjust_price(self, price: float, order_type: str) -> float:
        """BUY +0.5% / SELL -0.5%, USD 소수점 2자리 반환."""
        adjusted = price * 1.005 if order_type == "BUY" else price * 0.995
        return round(adjusted, 2)


def get_dispatcher(is_domestic: bool, exchange_code: str = "NASD") -> DomesticOrderDispatcher | OverseasOrderDispatcher:
    """is_domestic 에 따라 적절한 디스패처 반환."""
    if is_domestic:
        return DomesticOrderDispatcher()
    return OverseasOrderDispatcher(exchange_code=exchange_code)