from __future__ import annotations

from typing import Any, Dict, Optional, Union

from sqlalchemy.orm import Session

from app.core.security import get_password_hash, verify_password
from app.models.user import User
from app.schemas.user import UserCreate, UserUpdate
from app.utils.db import CRUDBase


class CRUDUser(CRUDBase[User, UserCreate, UserUpdate]):
    def get_by_email(self, db: Session, *, email: str) -> Optional[User]:
        """
        Get a user by email.
        """
        return db.query(User).filter(User.email == email).first()

    def get_by_username(self, db: Session, *, username: str) -> Optional[User]:
        """
        Get a user by username.
        """
        return db.query(User).filter(User.username == username).first()

    def create(self, db: Session, *, obj_in: UserCreate) -> User:
        """
        Create a new user.
        """
        db_obj = User(
            email=obj_in.email,
            username=obj_in.username,
            hashed_password=get_password_hash(obj_in.password),
            full_name=obj_in.full_name,
            date_of_birth=obj_in.date_of_birth,
            is_active=obj_in.is_active,
            is_superuser=obj_in.is_superuser,
            points=0,
            level=1,
        )
        db.add(db_obj)
        db.commit()
        db.refresh(db_obj)
        return db_obj

    def update(
        self, db: Session, *, db_obj: User, obj_in: Union[UserUpdate, Dict[str, Any]]
    ) -> User:
        """
        Update a user.
        """
        if isinstance(obj_in, dict):
            update_data = obj_in
        else:
            update_data = obj_in.model_dump(exclude_unset=True)

        # Handle password update
        if update_data.get("password"):
            hashed_password = get_password_hash(update_data["password"])
            del update_data["password"]
            update_data["hashed_password"] = hashed_password

        return super().update(db, db_obj=db_obj, obj_in=update_data)

    def authenticate(self, db: Session, *, email: str, password: str) -> Optional[User]:
        """
        Authenticate a user by email and password.
        """
        user = self.get_by_email(db, email=email)
        if not user:
            return None
        if not verify_password(password, user.hashed_password):
            return None
        return user

    def is_active(self, user: User) -> bool:
        """
        Check if a user is active.
        """
        return user.is_active

    def is_superuser(self, user: User) -> bool:
        """
        Check if a user is a superuser.
        """
        return user.is_superuser

    def add_points(self, db: Session, *, user_id: int, points: int) -> User:
        """
        Add points to a user's account and check for level up.
        """
        user = self.get(db, id=user_id)
        if not user:
            return None

        user.points += points

        # Simple level up logic: 100 points per level
        new_level = (user.points // 100) + 1
        user.level = max(user.level, new_level)

        db.commit()
        db.refresh(user)
        return user


user = CRUDUser(User)