"""
FastAPI 애플리케이션 진입점

- CORS, 미들웨어 설정
- WebSocket 실시간 시세 브로드캐스트
- 라우터 등록 및 startup/shutdown 이벤트 관리
"""
from fastapi import FastAPI, WebSocket, WebSocketDisconnect, Request
from fastapi.middleware.cors import CORSMiddleware
from contextlib import asynccontextmanager
import contextlib
import asyncio
import json
import logging
import time
import pytz

from app.core.config import settings
from app.api import api_router
from app.services.websocket_manager import websocket_manager
from app.core.json_helpers import _dumps
from app.services.db_worker import db_writer_worker
from app.core.database import engine, Base, AsyncSessionLocal
from app.models import models  # 모델 임포트
from app.core.market_schedule import is_market_open

# 로깅 설정
import os
import logging.handlers
from app.core.logging_config import KSTFormatter
_log_level = getattr(logging, settings.LOG_LEVEL.upper(), logging.INFO)
_log_format = '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
_log_dir = os.path.join(os.path.dirname(os.path.dirname(os.path.dirname(__file__))), "logs")
os.makedirs(_log_dir, exist_ok=True)
_log_file = os.path.join(_log_dir, "backend.log")

_formatter = KSTFormatter(_log_format)
_handlers: list[logging.Handler] = [
    logging.StreamHandler(),
    logging.handlers.RotatingFileHandler(
        _log_file, maxBytes=10 * 1024 * 1024, backupCount=5, encoding="utf-8"
    ),
]
for _h in _handlers:
    _h.setFormatter(_formatter)

logging.basicConfig(level=_log_level, handlers=_handlers)

logger = logging.getLogger(__name__)


def _normalize_recommendations(rec: dict) -> dict:
    """서로 다른 포맷의 추천 결과를 recommendations_by_rule 포맷으로 정규화.

    - get_rule_based_recommendations_realtime() → {"recommendations": [...], ...}
    - get_rule_based_recommendations_from_db()   → {"recommendations_by_rule": {...}, ...}

    둘 다 recommendations_by_rule 키를 보장한 상태로 돌려준다.
    Redis 캐시 데이터와 DB 데이터 모두 이 함수를 통해 정규화.
    변환 실패 시 원본 rec를 그대로 반환 (런타임 에러 방지).
    """
    if not rec:
        return rec or {}

    try:
        # Case 1: Already normalized (dict)
        if isinstance(rec.get("recommendations_by_rule"), dict):
            return rec

        # Determine the source of the recommendation list
        raw_list = []
        if "recommendations" in rec and isinstance(rec["recommendations"], list):
            raw_list = rec["recommendations"]
        elif "recommendations_by_rule" in rec and isinstance(rec["recommendations_by_rule"], list):
            # This is the case that causes the bug
            raw_list = rec["recommendations_by_rule"]

        if not raw_list:
            # if there is no list to process, make sure the output has a dict
            rec["recommendations_by_rule"] = {}
            return rec

        # Group the list by rule
        by_rule: dict = {}
        for item in raw_list:
            rule = (
                item.get("rule_name")
                or item.get("signal")
                or item.get("strategy")
                or "general"
            )
            by_rule.setdefault(rule, []).append(item)

        # Return the original dict with the new/replaced 'recommendations_by_rule'
        return {**rec, "recommendations_by_rule": by_rule}

    except Exception as e:
        logger.warning(f"⚠️ _normalize_recommendations 변환 실패, 원본 반환: {e}")
        return rec


async def batch_analysis_scheduler():
    """10분 간격 배치 분석 스케줄러.

    장중 10분마다 KIS API로 종목 분석 후 stock_analysis DB에 upsert.
    분석 완료 후 Redis에 recommendations:latest 캐시를 저장해
    auto_trade_scheduler가 DB 조회 없이 바로 매매 판단에 활용할 수 있도록 한다.

    개선:
    - 15:30 이후 장 종료 감지 → 익일 08:50까지 자동 중단
    - 분석 실패 시 exponential backoff 재시도 (최대 3회: 10s/20s/40s)
    """
    await asyncio.sleep(15)  # 부팅 안정화 (auto_trade_scheduler보다 늦게 시작)
    from app.api.endpoints.recommendations import get_rule_based_recommendations_realtime
    from app.core.redis import setex_json, TTL_RECOMMENDATIONS, TTL_ANALYSIS
    from datetime import timedelta as _td

    interval = int(getattr(settings, "BATCH_ANALYSIS_INTERVAL", 600))  # 기본 10분
    _KST = pytz.timezone("Asia/Seoul")
    logger.info(f"📊 Batch analysis scheduler started (every {interval}s)")
    try:
        while True:
            now_kst = pytz.datetime.datetime.now(_KST)

            # 15:30 이후 → 장 종료, 익일 08:50까지 대기
            if now_kst.hour > 15 or (now_kst.hour == 15 and now_kst.minute >= 30):
                tomorrow_start = (
                    _KST.localize(
                        pytz.datetime.datetime(now_kst.year, now_kst.month, now_kst.day, 8, 50, 0)
                    ) + _td(days=1)
                )
                sleep_sec = max((tomorrow_start - now_kst).total_seconds(), 3600)
                logger.info(f"⏸️ [Batch] 장 종료 (15:30 이후). {sleep_sec / 3600:.1f}시간 후 재개")
                await asyncio.sleep(sleep_sec)
                continue

            if not is_market_open():
                await asyncio.sleep(1800)
                continue

            # ── exponential backoff 재시도 (최대 3회) ────────────────────────
            max_retries = 3
            for attempt in range(max_retries):
                try:
                    suffix = f" (재시도 {attempt + 1}/{max_retries})" if attempt > 0 else ""
                    logger.info(f"🔄 [Batch] 10-min analysis cycle starting...{suffix}")
                    result = await get_rule_based_recommendations_realtime()
                    count = len(result.get("recommendations", [])) if result else 0
                    logger.info(f"✅ [Batch] Done: {count} stocks saved/updated in stock_analysis DB")

                    # ── Redis 캐시 업데이트 ─────────────────────────────────────────
                    if result:
                        # 정규화: recommendations_by_rule 키 보장 (auto_trade_scheduler 호환)
                        normalized = _normalize_recommendations(result)
                        ok = await setex_json(
                            "recommendations:latest", TTL_RECOMMENDATIONS, normalized
                        )
                        if ok:
                            rec_by_rule = normalized.get('recommendations_by_rule', [])
                            rec_count = len(rec_by_rule) if isinstance(rec_by_rule, (list, dict)) else 0
                            logger.info(
                                f"💾 [Batch] Redis 캐시 갱신 완료: recommendations:latest "
                                f"(rule 수: {rec_count}, "
                                f"TTL: {TTL_RECOMMENDATIONS}s)"
                            )

                        # ===== 개별 종목별 캐시 (병렬 처리 적용) =====
                        raw_list = result.get("recommendations", [])
                        cache_tasks = []

                        for item in raw_list:
                            code = item.get("stock_code") or item.get("code")
                            if code:
                                cache_tasks.append(setex_json(f"analysis:{code}", TTL_ANALYSIS, item))

                        if cache_tasks:
                            await asyncio.gather(*cache_tasks, return_exceptions=True)
                            logger.info(f"💾 [Batch] 개별 종목 분석 데이터 캐시 갱신 완료: {len(cache_tasks)}건 (TTL: {TTL_ANALYSIS}s)")
                        # ===============================================
                    # ───────────────────────────────────────────────────────
                    break  # 성공 시 재시도 루프 탈출

                except Exception as e:
                    wait = 10 * (2 ** attempt)  # 10s → 20s → 40s
                    if attempt < max_retries - 1:
                        logger.warning(
                            f"⚠️ [Batch] 분석 실패 ({attempt + 1}/{max_retries}), "
                            f"{wait}초 후 재시도: {e}"
                        )
                        await asyncio.sleep(wait)
                    else:
                        logger.error(f"❌ Batch analysis error (최대 재시도 초과): {e}", exc_info=True)

            await asyncio.sleep(interval)
    except asyncio.CancelledError:
        logger.info("⏹️ Batch analysis scheduler stopped")
        raise


async def auto_trade_scheduler():
    """1분 간격 자동매매 스케줄러.

    Redis 캐시(recommendations:latest)를 먼저 확인 → 캐시 히트 시 DB 조회 없이 매매 실행.
    케시 미스(30분 TTL 만료) 시만 get_rule_based_recommendations_from_db() 호출.
    주문 직전 MCP RISK_ASSESSMENT 호출 → 승인 시만 주문.
    """
    await asyncio.sleep(2)
    from app.api.endpoints.recommendations import (
        get_rule_based_recommendations_from_db,
        execute_auto_trade_background,
    )
    from app.api.endpoints.portfolio import check_and_execute_exit_trades
    from app.api.endpoints.mcp import request_mcp_risk_assessment
    from app.core.redis import get_json

    logger.info("⏱️ Auto-trade scheduler started (every 60s, Redis→DB fallback mode)")
    try:
        while True:
            try:
                if not is_market_open():
                    logger.info("💤 Market is closed. Next check in 30 minutes.")
                    await asyncio.sleep(1800)
                    continue

                async with AsyncSessionLocal() as session:
                    # 1. 보유 종목 손절/익절 체크
                    logger.info("💰 Checking portfolio for stop-loss/take-profit...")
                    try:
                        await check_and_execute_exit_trades(session)
                    except Exception as e:
                        logger.error(f"Exit trade check error: {e}", exc_info=True)

                    # 2. 자동매매: Redis 캐시 우선 → cache miss 시만 DB 조회
                    if settings.AUTO_TRADE_ENABLED:
                        # ── Redis 캐시 확인 (10분 배치 결과, TTL 30분) ────────────────
                        rec = await get_json("recommendations:latest")
                        if rec:
                            rec_by_rule = rec.get('recommendations_by_rule', [])
                            rec_count = len(rec_by_rule) if isinstance(rec_by_rule, (list, dict)) else 0
                            logger.info(
                                "⚡ Redis cache hit: recommendations:latest "
                                f"(rule 수: {rec_count}) "
                                "→ DB 조회 생략"
                            )
                            # 포맷 정규화 (다른 키 조합 대응)
                            rec = _normalize_recommendations(rec)
                        else:
                            logger.info("🔄 Redis cache miss → DB에서 추천 조회")
                            rec = await get_rule_based_recommendations_from_db(session)
                        # ──────────────────────────────────────────────────────

                        if rec and rec.get("recommendations_by_rule"):
                            # ── MCP RISK_ASSESSMENT (공통 함수, 이슈 4) ──────────
                            recommendations = rec.get("recommendations_by_rule", [])
                            
                            # Handle both list and dict formats for backwards compatibility
                            if isinstance(recommendations, dict):
                                # Old format: {rule_name: [stocks]}
                                recommendation_count = sum(len(v) for v in recommendations.values())
                                rules_list = list(recommendations.keys())
                                top_stocks_list = [
                                    item.get("stock_code") or item.get("code", "")
                                    for rule_items in recommendations.values()
                                    for item in (
                                        rule_items[:3]
                                        if isinstance(rule_items, list)
                                        else []
                                    )
                                ][:10]
                            else:
                                # New format: [{rule_id, rule_name, stocks: [...]}]
                                recommendation_count = sum(
                                    len(rule_group.get("stocks", []))
                                    for rule_group in recommendations
                                    if isinstance(rule_group, dict)
                                )
                                rules_list = [
                                    rule_group.get("rule_name", rule_group.get("rule_id", ""))
                                    for rule_group in recommendations
                                    if isinstance(rule_group, dict)
                                ]
                                top_stocks_list = [
                                    item.get("stock_code") or item.get("code", "")
                                    for rule_group in recommendations
                                    if isinstance(rule_group, dict)
                                    for item in rule_group.get("stocks", [])[:3]
                                ][:10]
                            
                            trade_plan = {
                                "action": "BUY",
                                "strategy": "rule_based_batch",
                                "recommendation_count": recommendation_count,
                                "rules": rules_list,
                                "top_stocks": top_stocks_list,
                            }
                            portfolio: dict = {}
                            signals = {
                                "source": "db_recommendations",
                                "rules_triggered": rules_list,
                            }
                            approve, reason = await request_mcp_risk_assessment(
                                trade_plan, portfolio, signals
                            )
                            # ─────────────────────────────────────────────────────
                            if not approve:
                                logger.warning(
                                    f"🛑 MCP RISK_ASSESSMENT DENY → 주문 스킵. 사유: {reason}"
                                )
                                try:
                                    from app.services.db_worker import enqueue_db_write
                                    await enqueue_db_write({
                                        "type": "log_mcp_deny",
                                        "reason": reason,
                                        "trade_plan": trade_plan,
                                    })
                                except Exception:
                                    pass
                            else:
                                if reason:
                                    logger.info(
                                        f"✅ MCP RISK_ASSESSMENT APPROVE. 참고: {reason}"
                                    )
                                logger.info("📊 Found recommendations, executing auto-trade")
                                await execute_auto_trade_background(rec, session)
                        else:
                            logger.info("⏭️ Auto-trade skipped: no recommendations")
                    else:
                        logger.info("⏸️ Auto-trade disabled - only monitoring stop-loss/take-profit")
            except Exception as e:
                logger.error(f"❌ Auto-trade scheduler error: {e}", exc_info=True)

            await asyncio.sleep(60)
    except asyncio.CancelledError:
        logger.info("⏹️ Auto-trade scheduler stopped")
        raise


async def day_trade_scheduler():
    """30초 간격 데이트레이딩 스케줄러.

    - Opening Range 수집 (09:00~09:30)
    - 진입 신호 스캔 + 주문 실행 (09:30~15:00)
    - EOD 강제 청산 (15:20~15:30)
    - 장 외 시간: 30분 슬립
    """
    await asyncio.sleep(5)
    from app.api.endpoints.day_trading import run_day_trading_cycle

    logger.info("📈 Day-trade scheduler started (every 30s)")
    try:
        while True:
            if not is_market_open():
                await asyncio.sleep(1800)
                continue
            if not settings.DAY_TRADE_ENABLED:
                await asyncio.sleep(60)
                continue
            try:
                result = await run_day_trading_cycle()
                phase = result.get("phase", "")
                if result.get("entries"):
                    logger.info(f"📈 데이트레이딩 진입: {result['entries']}")
                if result.get("exits"):
                    logger.info(f"📉 데이트레이딩 청산: {result['exits']}")
                if phase not in ("market_closed", "outside_window"):
                    logger.debug(f"Day-trade cycle [{phase}]: {result.get('time')}")
            except Exception as e:
                logger.error(f"❌ Day-trade scheduler error: {e}", exc_info=True)
            await asyncio.sleep(30)
    except asyncio.CancelledError:
        logger.info("⏹️ Day-trade scheduler stopped")
        raise


async def krx_data_collector_scheduler():
    """장 종료 후 KRX 일봉 데이터 자동 수집 스케줄러.

    매일 15:40 KST 이후 collect_all(update_mode=True) 를 1회 실행.
    이미 오늘 수집 완료된 경우 다음 날까지 스킵.
    """
    import pytz as _pytz
    from datetime import datetime as _dt, date as _date

    _KST = _pytz.timezone("Asia/Seoul")
    _last_collected: _date | None = None

    await asyncio.sleep(30)  # 부팅 안정화
    logger.info("📅 KRX data collector scheduler started (daily after 15:40 KST)")

    try:
        while True:
            now_kst = _dt.now(_KST)
            today = now_kst.date()

            # 오늘 이미 수집했으면 자정까지 대기
            if _last_collected == today:
                # 다음 날 16:00까지 남은 초 계산
                from datetime import timedelta as _td
                tomorrow_16 = _KST.localize(
                    _dt(today.year, today.month, today.day, 16, 0, 0)
                ) + _td(days=1)
                sleep_sec = (tomorrow_16 - now_kst).total_seconds()
                logger.info(f"📅 KRX 오늘 수집 완료. 다음 수집까지 {sleep_sec/3600:.1f}시간 대기")
                await asyncio.sleep(max(sleep_sec, 60))
                continue

            # 15:40 이전이면 대기
            collect_hour, collect_min = 15, 40
            if (now_kst.hour, now_kst.minute) < (collect_hour, collect_min):
                # 오늘 15:40까지 남은 초
                target = _KST.localize(
                    _dt(today.year, today.month, today.day, collect_hour, collect_min, 0)
                )
                sleep_sec = (target - now_kst).total_seconds()
                if sleep_sec > 0:
                    logger.info(f"📅 KRX 수집 대기 중... 15:40까지 {sleep_sec/60:.0f}분 남음")
                    await asyncio.sleep(min(sleep_sec, 1800))  # 최대 30분마다 재확인
                    continue

            # 주말(토/일)은 스킵하고 다음 날 재확인
            if today.weekday() >= 5:
                await asyncio.sleep(3600)
                continue

            # 수집 실행 (최대 3회 재시도, 30분 간격)
            max_krx_retries = 3
            for krx_attempt in range(max_krx_retries):
                try:
                    suffix = f" (재시도 {krx_attempt + 1}/{max_krx_retries})" if krx_attempt > 0 else ""
                    logger.info(f"📥 [KRX] 일봉 데이터 증분 수집 시작 (update mode){suffix}...")
                    from collect_krx_data import collect_all
                    await collect_all(update_mode=True)
                    _last_collected = today
                    logger.info("✅ [KRX] 일봉 데이터 수집 완료")
                    break
                except Exception as e:
                    if krx_attempt < max_krx_retries - 1:
                        logger.warning(
                            f"⚠️ [KRX] 수집 실패 ({krx_attempt + 1}/{max_krx_retries}), "
                            f"30분 후 재시도: {e}"
                        )
                        await asyncio.sleep(1800)
                    else:
                        logger.error(f"❌ [KRX] 데이터 수집 최대 재시도 초과: {e}", exc_info=True)

    except asyncio.CancelledError:
        logger.info("⏹️ KRX data collector scheduler stopped")
        raise


@asynccontextmanager
async def lifespan(app: FastAPI):
    """애플리케이션 시작/종료 시 실행될 코드"""
    logger.info("Starting Auto Stock Trading System...")
    logger.info(f"KIS API Mode: {'모의투자 (VIRTUAL)' if settings.is_virtual_trading else '실전투자 (REAL)'}")
    logger.info(f"KIS Base URL: {settings.KOREA_INVESTMENT_API_BASE_URL}")
    logger.info(f"KIS Account: {settings.KOREA_INVESTMENT_ACCOUNT_NUMBER}")

    # ── 필수 환경변수 검증 (조기 경보) ──────────────────────────────────────────
    for warn_msg in settings.validate_required():
        logger.warning(f"⚠️ [Config] {warn_msg}")

    # DB 테이블 자동 생성
    # 컬럼 추가/테이블 생성 DDL 은 Alembic migration 으로 관리됨.
    # 배포 전 `cd backend && alembic upgrade head` 를 실행할 것.
    # (alembic/versions/0001_initial_schema_columns.py)
    try:
        logger.info(f"Connecting to database: {settings.DATABASE_URL.split('@')[1] if '@' in settings.DATABASE_URL else 'unknown'}")
        async with engine.begin() as conn:
            await conn.run_sync(Base.metadata.create_all)
        logger.info("✅ Database tables created successfully")

        try:
            from app.services.loss_tracker import loss_tracker
            async with AsyncSessionLocal() as session:
                await loss_tracker.load_from_db(session)
        except Exception as e:
            logger.warning(f"⚠️ loss_tracker 초기화 실패 (non-critical): {e}")

        # ── 전략 파라미터 DB 초기화 (config.py 기본값 → strategy_configs 테이블 seed) ──
        try:
            from app.services.strategy_config_service import strategy_cfg
            await strategy_cfg.auto_init()
        except Exception as e:
            logger.warning(f"⚠️ strategy_cfg 초기화 실패 (non-critical): {e}")
        # ────────────────────────────────────────────────────────────────────────────

        try:
            from app.models.models import StockAnalysis, TradeHistory, Portfolio
            from sqlalchemy import delete
            from datetime import datetime, timedelta

            async with AsyncSessionLocal() as session:
                _kst = pytz.timezone("Asia/Seoul")
                _today_kst = datetime.now(_kst).date()
                cutoff_date = _today_kst - timedelta(days=7)
                result = await session.execute(
                    delete(StockAnalysis).where(StockAnalysis.analysis_date < cutoff_date)
                )
                if result.rowcount > 0:
                    logger.info(f"🗑️ Deleted {result.rowcount} old stock_analysis records")

                cutoff_datetime = _today_kst - timedelta(days=1)
                result = await session.execute(
                    delete(TradeHistory).where(
                        TradeHistory.status.in_(['PENDING', 'FAILED']),
                        TradeHistory.created_at < cutoff_datetime,
                    )
                )
                if result.rowcount > 0:
                    logger.info(f"🗑️ Deleted {result.rowcount} old PENDING/FAILED trades")

                result = await session.execute(
                    delete(Portfolio).where(Portfolio.quantity <= 0)
                )
                if result.rowcount > 0:
                    logger.info(f"🗑️ Deleted {result.rowcount} empty portfolio records")

                await session.commit()
                logger.info("✅ Test data cleanup completed")
        except Exception as e:
            logger.warning(f"⚠️ Test data cleanup failed (non-critical): {e}")

    except ConnectionRefusedError as e:
        logger.error(f"❌ Database connection refused: {e}")
        raise
    except Exception as e:
        logger.error(f"❌ Failed to create database tables: {e}")
        import traceback
        logger.error(traceback.format_exc())
        raise

    try:
        from app.api.endpoints.day_trading import restore_positions_from_db
        await restore_positions_from_db()
    except Exception as e:
        logger.warning(f"⚠️ 데이트레이딩 포지션 복구 실패 (non-critical): {e}")

    # ── httpx 싱글톤 클라이언트 초기화 ──────────────────────────────────────
    from app.api.endpoints.mcp import init_http_client, close_http_client
    await init_http_client()

    # ── Redis 클라이언트 초기화 ───────────────────────────────────────────────
    from app.core.redis import init_redis, close_redis
    await init_redis()

    # 워커 + 스케줄러 시작
    app.state.db_worker_task = asyncio.create_task(db_writer_worker())
    app.state.auto_trade_task = asyncio.create_task(auto_trade_scheduler())
    app.state.batch_analysis_task = asyncio.create_task(batch_analysis_scheduler())
    app.state.day_trade_task = asyncio.create_task(day_trade_scheduler())
    app.state.krx_collector_task = asyncio.create_task(krx_data_collector_scheduler())

    # KIS 실시간 스트림 시작 (설정으로 제어 가능)
    if settings.KIS_WS_ENABLED:
        from app.services.kis_realtime_stream import run_kis_realtime_stream
        app.state.kis_stream_task = asyncio.create_task(run_kis_realtime_stream())
        logger.info("📡 KIS 실시간 스트림 태스크 시작 (KIS_WS_ENABLED=True)")
    else:
        logger.info("⏭️  KIS 실시간 스트림 비활성화됨 (KIS_WS_ENABLED=False in .env)")
        app.state.kis_stream_task = None

    yield

    # 태스크 정리
    for task_attr in (
        "auto_trade_task",
        "batch_analysis_task",
        "day_trade_task",
        "krx_collector_task",
        "db_worker_task",
        "kis_stream_task",
    ):
        try:
            task = getattr(app.state, task_attr, None)
            if task:
                task.cancel()
                with contextlib.suppress(asyncio.CancelledError):
                    await task
        except Exception as e:
            logger.warning(f"Failed to stop {task_attr} gracefully: {e}")

    # ── httpx 클라이언트 종료 ─────────────────────────────────────────────────
    try:
        await close_http_client()
    except Exception as e:
        logger.warning(f"Failed to close http_client: {e}")

    # ── Redis 클라이언트 종료 ─────────────────────────────────────────────────
    try:
        await close_redis()
    except Exception as e:
        logger.warning(f"Failed to close Redis: {e}")

    logger.info("Shutting down Auto Stock Trading System...")
    await engine.dispose()


app = FastAPI(
    title=settings.APP_NAME,
    description="Claude AI와 MCP를 활용한 자동 주식 매매 시스템",
    version="1.0.0",
    lifespan=lifespan,
    debug=settings.DEBUG,
)

# CORS 설정
_cors_origins = getattr(settings, "CORS_ORIGINS", None)
if _cors_origins:
    _allowed_origins = [o.strip() for o in _cors_origins.split(",") if o.strip()]
else:
    _allowed_origins = [
        "http://localhost:5173",
        "http://localhost:3000",
        "http://127.0.0.1:5173",
        "http://127.0.0.1:3000",
    ]
app.add_middleware(
    CORSMiddleware,
    allow_origins=_allowed_origins,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
    expose_headers=["*"],
)
logger.info("CORS middleware configured")


_LOG_SKIP_PREFIXES = ("/health", "/ws/")


@app.middleware("http")
async def log_requests(request: Request, call_next):
    path = request.url.path
    # /health, /ws/ 는 폴링이 잦아 로그 노이즈가 크므로 debug 레벨로 낮춤
    if any(path.startswith(p) for p in _LOG_SKIP_PREFIXES):
        return await call_next(request)

    start_time = time.time()
    logger.info(f"🔵 Request: {request.method} {request.url}")
    response = await call_next(request)
    process_time = time.time() - start_time
    logger.info(
        f"🟢 Response: {request.method} {request.url} "
        f"- Status: {response.status_code} - Time: {process_time:.3f}s"
    )
    return response


app.include_router(api_router, prefix="/api/v1")


# ── 전역 예외 핸들러 ────────────────────────────────────────────────────────────
from fastapi import Request as _Request
from fastapi.responses import JSONResponse as _JSONResponse


@app.exception_handler(Exception)
async def global_exception_handler(_req: _Request, exc: Exception) -> _JSONResponse:
    """처리되지 않은 예외를 500 JSON으로 변환해 일관된 에러 응답을 보장한다."""
    logger.error(f"Unhandled exception: {_req.method} {_req.url} — {exc}", exc_info=True)
    return _JSONResponse(
        status_code=500,
        content={"detail": "내부 서버 오류가 발생했습니다. 잠시 후 다시 시도해 주세요."},
    )


@app.get("/")
async def root():
    return {"message": "Auto Stock Trading System API", "version": "1.0.0", "status": "running"}


@app.get("/health")
async def health_check():
    """DB / Redis 연결 상태를 포함한 헬스체크."""
    from sqlalchemy import text as _sa_text
    from app.core.redis import get_redis

    db_ok = False
    redis_ok = False

    try:
        async with engine.connect() as conn:
            await conn.execute(_sa_text("SELECT 1"))
        db_ok = True
    except Exception:
        pass

    try:
        r = get_redis()
        if r:
            await r.ping()
            redis_ok = True
    except Exception:
        pass

    status = "healthy" if (db_ok and redis_ok) else "degraded"
    return {
        "status": status,
        "db": "ok" if db_ok else "error",
        "redis": "ok" if redis_ok else "error",
    }


@app.websocket("/ws/{client_id}")
async def websocket_endpoint(websocket: WebSocket, client_id: str):
    """WebSocket 연결 엔드포인트.

    클라이언트→서버 지원 프로토콜:
      {"type": "ping"}                                       → {"type": "pong"}
      {"type": "subscribe", "stock_codes": [...]}           → ACK
      {"type": "unsubscribe", "stock_codes": [...]}         → ACK
      {"type": "set_subscriptions", "stock_codes": [...]}   → ACK
      {"type": "get_chart", "stock_code": "...", "period": "D", "limit": 200}
                                                            → {"type": "chart_data", ...}
      그 외 메시지                                           → echo
    """
    await websocket_manager.connect(websocket, client_id)
    try:
        while True:
            try:
                data = await asyncio.wait_for(websocket.receive_text(), timeout=60.0)
            except asyncio.TimeoutError:
                # 60초 동안 메시지 없음 → ping 전송으로 연결 유지 확인
                try:
                    await websocket_manager.send_personal_message(
                        json.dumps({"type": "ping"}), client_id
                    )
                except Exception:
                    break
                continue
            try:
                msg = json.loads(data)
            except (json.JSONDecodeError, AttributeError):
                await websocket_manager.send_personal_message(f"Echo: {data}", client_id)
                continue

            msg_type = msg.get("type", "")

            if msg_type == "ping":
                await websocket_manager.send_personal_message(
                    json.dumps({"type": "pong"}), client_id
                )
                continue

            if msg_type == "subscribe":
                codes = [str(c) for c in msg.get("stock_codes", [])]
                websocket_manager.subscribe(client_id, codes)
                await websocket_manager.send_personal_message(
                    json.dumps({
                        "type": "ack", "action": "subscribe",
                        "stock_codes": codes,
                        "subscriptions": websocket_manager.get_subscriptions(client_id),
                    }),
                    client_id,
                )
                continue

            if msg_type == "unsubscribe":
                codes = [str(c) for c in msg.get("stock_codes", [])]
                websocket_manager.unsubscribe(client_id, codes)
                await websocket_manager.send_personal_message(
                    json.dumps({
                        "type": "ack", "action": "unsubscribe",
                        "stock_codes": codes,
                        "subscriptions": websocket_manager.get_subscriptions(client_id),
                    }),
                    client_id,
                )
                continue

            if msg_type == "set_subscriptions":
                codes = [str(c) for c in msg.get("stock_codes", [])]
                websocket_manager.set_subscriptions(client_id, codes)
                # 구독 목록 변경 → KIS 스트림에 즉시 동기화 요청
                from app.services.kis_realtime_stream import kis_stream
                kis_stream.notify_subscription_change()
                await websocket_manager.send_personal_message(
                    json.dumps({
                        "type": "ack", "action": "set_subscriptions",
                        "stock_codes": codes,
                        "subscriptions": websocket_manager.get_subscriptions(client_id),
                    }),
                    client_id,
                )
                # 구독 종목 차트 캐시 사전 워밍업 (백그라운드, 논블로킹)
                if codes:
                    async def _warmup_chart_cache(stock_codes: list):
                        from app.api.endpoints.market_data import get_chart_data_cached, chart_cache
                        from datetime import datetime
                        for code in stock_codes:
                            cached = chart_cache.get(f"{code}__D")
                            if cached and (datetime.now() - cached["timestamp"]).total_seconds() < 600:
                                continue
                            try:
                                await get_chart_data_cached(code, "D", 100)
                                logger.debug(f"[warmup] {code} 차트 캐시 완료")
                            except Exception as e:
                                logger.debug(f"[warmup] {code} 캐시 실패: {e}")
                    asyncio.create_task(_warmup_chart_cache(codes))
                continue

            if msg_type == "get_chart":
                stock_code = str(msg.get("stock_code", "")).strip()
                period = msg.get("period", "D")
                limit = int(msg.get("limit", 200))
                if not stock_code:
                    continue
                try:
                    from app.api.endpoints.market_data import get_chart_data_cached
                    chart_data = await get_chart_data_cached(stock_code, period, limit)
                    await websocket_manager.send_personal_message(
                        _dumps({"type": "chart_data", "stock_code": stock_code, "period": period, "data": chart_data}),
                        client_id,
                    )
                except Exception as e:
                    logger.error(f"get_chart 오류 ({stock_code}): {e}")
                    await websocket_manager.send_personal_message(
                        _dumps({"type": "chart_data", "stock_code": stock_code, "period": period, "data": [], "error": str(e)}),
                        client_id,
                    )
                continue

            await websocket_manager.send_personal_message(f"Echo: {data}", client_id)

    except WebSocketDisconnect:
        websocket_manager.disconnect(client_id)
        logger.info(f"Client {client_id} disconnected")

@app.post("/api/admin/reset-daily-loss")
async def reset_daily_loss():
    """테스트용 일일 손실 한도 강제 리셋"""
    from app.services.mdd_manager import mdd_manager
    mdd_manager.reset()  # 이미 reset() 메서드 존재 [cite:9]
    return {"status": "ok", "message": "daily loss limit reset"}


if __name__ == "__main__":
    import uvicorn
    uvicorn.run(
        "app.main:app",
        host=settings.BACKEND_HOST,
        port=settings.BACKEND_PORT,
        reload=settings.DEBUG,
    )