from apscheduler.schedulers.asyncio import AsyncIOScheduler
from app.core.market_schedule import market_schedule
from app.services.kis_client import kis_client
from app.services.realtime_manager import realtime_manager
from app.db.database import SessionLocal
from app.core.startup import check_kis_connectivity, check_telegram_connectivity
from app.db.models import StockItem, ReservedOrder, ApiSettings

logger = logging.getLogger(__name__)

scheduler = AsyncIOScheduler()

class ServiceState:
    last_keys_hash: str = ""
    telegram_active: bool = False
    naver_active: bool = False
    
    @classmethod
    def get_keys_hash(cls, settings: ApiSettings):
        return f"{settings.appKey}{settings.appSecret}{settings.accountNumber}"

async def service_watchdog_job():
    """
    Periodically checks settings and initiates services if they were newly enabled or changed.
    """
    async with SessionLocal() as db_session:
        stmt = select(ApiSettings).where(ApiSettings.id == 1)
        result = await db_session.execute(stmt)
        settings_obj = result.scalar_one_or_none()
        
        if not settings_obj: return

        # 1. KIS Connectivity Watchdog
        current_hash = ServiceState.get_keys_hash(settings_obj)
        if current_hash != ServiceState.last_keys_hash and settings_obj.appKey:
            logger.info("Watchdog: KIS Credentials Changed or Initialized. Re-authenticating...")
            success = await check_kis_connectivity(db_session, settings_obj)
            if success:
                ServiceState.last_keys_hash = current_hash
        
        # 2. Telegram Watchdog
        if settings_obj.useTelegram and not ServiceState.telegram_active:
            if settings_obj.telegramToken and settings_obj.telegramChatId:
                logger.info("Watchdog: Telegram newly enabled. Sending activation message.")
                from app.services.telegram_service import telegram_service
                msg = "🔔 <b>알림 서비스가 활성화되었습니다.</b>\n이제부터 주요 거래 알림을 이곳으로 보내드립니다."
                await telegram_service.send_message(settings_obj.telegramToken, settings_obj.telegramChatId, msg)
                ServiceState.telegram_active = True
        elif not settings_obj.useTelegram:
            ServiceState.telegram_active = False

        # 3. Naver News Watchdog
        if settings_obj.useNaverNews and not ServiceState.naver_active:
             if settings_obj.naverClientId and settings_obj.naverClientSecret:
                 logger.info("Watchdog: Naver News newly enabled. (Logic placeholder)")
                 ServiceState.naver_active = True
        elif not settings_obj.useNaverNews:
            ServiceState.naver_active = False

async def market_check_job():
    """
    Periodic check to ensure Realtime Manager is connected when market is open.
    """
    logger.info("Scheduler: Market Check Job Running...")
    is_domestic_open = market_schedule.is_market_open("Domestic")
    # is_overseas_open = market_schedule.is_market_open("Overseas")
    
    # If market is open and WS is not running, start it
    if is_domestic_open and not realtime_manager.running:
        logger.info("Market is Open! Starting Realtime Manager.")
    else:
        logger.info(f"Market Status: Domestic={is_domestic_open}, RealtimeManager={realtime_manager.running}")

async def persist_market_data_job():
    """
    Flushes realtime_manager.price_cache to DB (StockItem).
    """
    if not realtime_manager.price_cache:
        return

    # Snapshot and clear (thread-safe ish in async single loop)
    # Or just iterate. Python dict iteration is safe if not modifying keys.
    # We'll take keys copy.
    codes_to_process = list(realtime_manager.price_cache.keys())
    
    if not codes_to_process:
        return
        
    async with SessionLocal() as session:
        count = 0
        for code in codes_to_process:
            data = realtime_manager.price_cache.get(code)
            if not data: continue
            
            # Upsert StockItem?
            # Or just update if exists. StockItem generally exists if synced.
            # If not exists, we might create it.
            
            price = float(data['price'])
            change = float(data['change'])
            rate = float(data['rate'])
            
            # Simple Update
            stmt = update(StockItem).where(StockItem.code == code).values(
                price=price,
                change=change,
                changePercent=rate
            )
            await session.execute(stmt)
            count += 1
            
        await session.commit()
    
    # logger.debug(f"Persisted {count} stock prices to DB.")

async def news_scrap_job():
    # Placeholder for News Scraper
    logger.info("Scheduler: Scraping Naver News (Placeholder)...")
    pass

async def auto_trade_scan_job():
    """
    Scans ReservedOrders and triggers actions if conditions are met.
    """
    async with SessionLocal() as session:
        # Fetch Monitoring Orders
        stmt = select(ReservedOrder).where(ReservedOrder.status == "MONITORING")
        result = await session.execute(stmt)
        orders = result.scalars().all()
        
        for order in orders:
            # Check Price
            current_price = 0
            
            # 1. Try Realtime Cache
            if order.stockCode in realtime_manager.price_cache:
                current_price = float(realtime_manager.price_cache[order.stockCode]['price'])
            else:
                # 2. Try DB (StockItem)
                # ... (omitted for speed, usually Cache covers if monitored)
                pass
                
            if current_price <= 0: continue
            
            # Trigger Logic (Simple)
            triggered = False
            if order.monitoringType == "PRICE_TRIGGER":
                # Buy if Price <= Trigger (Dip Buy) ?? OR Buy if Price >= Trigger (Breakout)?
                # Usually define "Condition". Assuming Buy Lower for now or User defined.
                # Let's assume TriggerPrice is "Target".
                # If BUY -> Price <= Trigger?
                # If SELL -> Price >= Trigger?
                
                if order.type == "BUY" and current_price <= order.triggerPrice:
                    triggered = True
                elif order.type == "SELL" and current_price >= order.triggerPrice:
                    triggered = True
            
            elif order.monitoringType == "TRAILING_STOP":
                if order.type == "SELL":
                    # Trailing Sell (High Water Mark)
                    if not order.highestPrice or current_price > order.highestPrice:
                        order.highestPrice = current_price
                    
                    if order.highestPrice > 0 and order.trailingValue:
                        drop = order.highestPrice - current_price
                        triggered = False
                        
                        if order.trailingType == "PERCENT":
                            drop_rate = (drop / order.highestPrice) * 100
                            if drop_rate >= order.trailingValue: triggered = True
                        else: # AMOUNT
                            if drop >= order.trailingValue: triggered = True
                            
                        if triggered:
                            logger.info(f"TS SELL Triggered: High={order.highestPrice}, Curr={current_price}")

                elif order.type == "BUY":
                    # Trailing Buy (Low Water Mark / Rebound)
                    # Initialize lowest if 0 (assuming stock price never 0, or use 99999999 default)
                    if not order.lowestPrice or order.lowestPrice == 0:
                        order.lowestPrice = current_price
                        
                    if current_price < order.lowestPrice:
                        order.lowestPrice = current_price
                        
                    if order.lowestPrice > 0 and order.trailingValue:
                        rise = current_price - order.lowestPrice
                        triggered = False
                        
                        if order.trailingType == "PERCENT":
                            rise_rate = (rise / order.lowestPrice) * 100
                            if rise_rate >= order.trailingValue: triggered = True
                        else:
                            if rise >= order.trailingValue: triggered = True
                            
                        if triggered:
                            logger.info(f"TS BUY Triggered: Low={order.lowestPrice}, Curr={current_price}")
            
            if triggered:
                logger.info(f"Order TRIGGERED! {order.stockName} {order.type} @ {current_price} (Target: {order.triggerPrice})")
                
                # Execute Order
                # res = await kis_client.place_order(...)
                # Update Status
                # order.status = "TRIGGERED" (or "COMPLETED" after exec)
                pass
                
        await session.commit()

def start_scheduler():
    scheduler.add_job(market_check_job, 'interval', minutes=5)
    scheduler.add_job(news_scrap_job, 'interval', minutes=10)
    scheduler.add_job(auto_trade_scan_job, 'interval', minutes=1)
    scheduler.add_job(service_watchdog_job, 'interval', minutes=1) # Check settings every 1 min
    scheduler.add_job(persist_market_data_job, 'interval', seconds=10) # Persist every 10s
    
    scheduler.start()
    logger.info("Scheduler Started.")