from passlib.context import CryptContext
from sqlalchemy.orm import Session
from models import User

pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")

def verify_password(plain_password, hashed_password):
    return pwd_context.verify(plain_password, hashed_password)

def get_password_hash(password):
    return pwd_context.hash(password)

def authenticate_user(db: Session, username: str, password: str):
    user = db.query(User).filter(User.username == username).first()
    if not user:
        return None
    if not verify_password(password, user.password):
        return None
    return user

def create_user(db: Session, username: str, password: str, is_admin: bool = False):
    hashed_password = get_password_hash(password)
    db_user = User(username=username, password=hashed_password, is_admin=is_admin)
    db.add(db_user)
    db.commit()
    db.refresh(db_user)
    return db_user