from sqlalchemy.ext.asyncio import AsyncSession
from sqlalchemy import select, text
from app.models.gamification import UserStats, PointsLedger
from app.models.identity import User

class GamificationService:
    @staticmethod
    async def award_points(db: AsyncSession, user_id: int, points: int, reason: str):
        """Pontok jóváírása (SQL szinkronizált points mezővel)."""
        new_entry = PointsLedger(
            user_id=user_id,
            points=points, # Javítva: points_change helyett points
            reason=reason
        )
        db.add(new_entry)
        
        result = await db.execute(select(UserStats).where(UserStats.user_id == user_id))
        stats = result.scalar_one_or_none()
        
        if not stats:
            stats = UserStats(user_id=user_id, total_points=0, current_level=1)
            db.add(stats)
            
        stats.total_points += points
        await db.flush() 
        return stats.total_points