import uuid
from typing import Optional
from sqlmodel import Session, select

from app.database.models.user_model import User
from app.schemas.user_schemas import UserRegister
from app.core.security import verify_password, get_password_hash
from app.utils.models import generate_user_uuid5

def get_user_by_generated_uuid(session: Session, email: str, shop_id: Optional[int]) -> Optional[User]:
    user_uuid = generate_user_uuid5(email, shop_id)
    stmt = select(User).where(User.uuid == user_uuid)
    db_user = session.exec(stmt).one_or_none()
    return db_user

def create_user(session: Session, user_register: UserRegister, shop_id: Optional[int], user_role: str):
    user_uuid = generate_user_uuid5(user_register.email, shop_id)
    password = get_password_hash(user_register.password)
    new_user = User(
        uuid=user_uuid,
        shop_id=shop_id,
        email=user_register.email,
        username=user_register.username,
        phone_number=user_register.phone_number
        )
    session.add(new_user)
    session.commit()


def authenticate(session: Session, email: str, password: str, shop_id: Optional[int]) -> Optional[User]:
    db_user = get_user_by_generated_uuid(session, email, shop_id)
    if db_user is None:
        return None
    if not verify_password(plain_password=password, hashed_password=db_user.password):
        return None
    return db_user