"""사용자 스코프 거래 이력 조회 API (`_v2`, 멀티테넌트 1단계 §5.7).

기존 `trades.py`의 `GET /trades`(파라미터·손익 계산 로직)는 그대로 두고,
`TradeHistory.user_id` 필터만 추가한 신규 라우터. 레거시 호환 규칙은
`portfolio_v2.py`의 `_user_scope_filter`와 동일(`MULTI_TENANT_ENABLED=False`면
`user_id == 대상 id` 또는 `user_id IS NULL` 모두 포함).
"""

import logging
import re
from datetime import datetime, timedelta
from decimal import Decimal
from typing import List, Optional

from fastapi import APIRouter, Depends
from pydantic import BaseModel
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession

from app.core.database import get_db
from app.core.tenant_auth import CurrentUser, get_current_user
from app.models.models import TradeHistory
from app.api.endpoints.portfolio_v2 import _resolve_target_user_id, _user_scope_filter
from app.api.endpoints.trades import TradeHistoryResponse

logger = logging.getLogger(__name__)
router = APIRouter()


@router.get("", response_model=List[TradeHistoryResponse])
async def get_trade_history_v2(
    skip: int = 0,
    limit: int = 100,
    stock_code: Optional[str] = None,
    status: Optional[str] = None,
    order_type: Optional[str] = None,
    days: int = 30,
    user_id: Optional[int] = None,
    user: CurrentUser = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
):
    """사용자 스코프 거래 이력 조회 (`GET /trades`와 동일 파라미터 + 손익 파싱)."""
    target_user_id = await _resolve_target_user_id(user, user_id, db)

    query = select(TradeHistory).where(_user_scope_filter(TradeHistory.user_id, target_user_id))

    since_date = datetime.utcnow() - timedelta(days=days)
    query = query.where(TradeHistory.created_at >= since_date)

    if stock_code:
        query = query.where(TradeHistory.stock_code == stock_code)
    if status:
        query = query.where(TradeHistory.status == status)
    if order_type:
        query = query.where(TradeHistory.order_type == order_type)

    query = query.order_by(TradeHistory.created_at.desc()).offset(skip).limit(limit)

    result = await db.execute(query)
    trades = result.scalars().all()

    trade_responses = []
    for trade in trades:
        response = TradeHistoryResponse.model_validate(trade)

        if trade.order_type == "SELL" and trade.status in ("EXECUTED", "COMPLETED"):
            if hasattr(trade, "net_profit_loss") and trade.net_profit_loss is not None:
                response.profit_loss = trade.net_profit_loss
            if hasattr(trade, "profit_loss_rate") and trade.profit_loss_rate is not None:
                response.profit_loss_rate = float(trade.profit_loss_rate)

            if response.profit_loss is None or response.profit_loss_rate is None:
                text_to_parse = trade.exit_reason or trade.message or ""
                if response.profit_loss is None:
                    profit_match = re.search(r"손익:\s*([+-]?[\d,]+)원", text_to_parse)
                    if profit_match:
                        try:
                            response.profit_loss = Decimal(profit_match.group(1).replace(",", ""))
                        except Exception as e:
                            logger.debug(f"[trades_v2] 손익 금액 파싱 실패: {e}")
                if response.profit_loss_rate is None:
                    message_rate_match = re.search(r"손익률\s*([+-]?[\d.]+)%", trade.message or "")
                    rate_match = message_rate_match or re.search(r"([+-]?[\d.]+)%", text_to_parse)
                    if rate_match:
                        try:
                            response.profit_loss_rate = float(rate_match.group(1))
                        except Exception as e:
                            logger.debug(f"[trades_v2] 손익률 파싱 실패: {e}")

        trade_responses.append(response)

    return trade_responses


# ── DELETE /trades/v2/pending ────────────────────────────────────────────
@router.delete("/pending")
async def delete_pending_trades_v2(
    user: CurrentUser = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
):
    """사용자 스코프 PENDING/FAILED 매수 시도 정리 (M6).

    기존 `DELETE /trades/pending`(trades.py)은 `user_id` 조건 없이 전체 삭제라
    `MULTI_TENANT_ENABLED=True`에서 일반 사용자가 타 사용자의 이력을 지울 수 있었다.
    `_user_scope_filter`와 동일 규칙(MT=False면 본인 id 또는 NULL 행 포함, MT=True면
    본인 행만)을 적용해 legacy 컨텍스트(관리자/API 키, MT=False)는 기존 동작과 동일하고,
    일반 사용자는 본인 이력만 지운다.
    """
    target_user_id = await _resolve_target_user_id(user, None, db)

    query = select(TradeHistory).where(
        TradeHistory.status.in_(["PENDING", "FAILED"]),
        _user_scope_filter(TradeHistory.user_id, target_user_id),
    )
    result = await db.execute(query)
    pending_trades = result.scalars().all()
    count = len(pending_trades)

    for trade in pending_trades:
        await db.delete(trade)
    await db.commit()

    logger.info(f"✅ [v2] user_id={target_user_id} 정리 완료: {count}개의 PENDING/FAILED 매수 시도 삭제")

    return {"deleted_count": count, "message": f"Cleaned up {count} pending/failed trades"}