from typing import Optional
from sqlalchemy.orm import Session
from app.models.ppr import User
from app.schemas.ppr import UserCreate
from app.core.security import get_password_hash, verify_password


class CRUDUser:
    def get(self, db: Session, user_id: int) -> Optional[User]:
        return db.query(User).filter(User.id == user_id).first()

    def get_by_username(self, db: Session, username: str) -> Optional[User]:
        return db.query(User).filter(User.username == username).first()

    def create(self, db: Session, obj_in: UserCreate) -> User:
        hashed_password = get_password_hash(obj_in.password)
        db_obj = User(
            username=obj_in.username,
            password=hashed_password
        )
        db.add(db_obj)
        db.commit()
        db.refresh(db_obj)
        return db_obj

    def authenticate(self, db: Session, username: str, password: str) -> Optional[User]:
        user = self.get_by_username(db, username=username)
        if not user:
            return None
        if not verify_password(password, user.password):
            return None
        return user

    def is_active(self, user: User) -> bool:
        # For future use if we add user status
        return True


user = CRUDUser()