from fastapi import Depends, HTTPException, status
from fastapi.security import OAuth2PasswordBearer
from jose import jwt
from pydantic import ValidationError
from sqlalchemy.orm import Session

from app import schemas
from app.core.config import settings
from app.db.session import get_db
from app.models.user import User
from app.services import user as user_service

oauth2_scheme = OAuth2PasswordBearer(tokenUrl=f"{settings.API_V1_STR}/auth/login")


def get_current_user(
    db: Session = Depends(get_db),
    token: str = Depends(oauth2_scheme),
) -> User:
    """
    Get the current user from the token.
    """
    try:
        payload = jwt.decode(
            token, settings.SECRET_KEY, algorithms=[settings.ALGORITHM]
        )
        token_data = schemas.TokenPayload(**payload)
    except (jwt.JWTError, ValidationError):
        raise HTTPException(
            status_code=status.HTTP_403_FORBIDDEN,
            detail="Could not validate credentials",
        )

    # Get the user from the token
    user = user_service.get_by_id(db, id=int(token_data.sub))
    if not user:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="User not found",
        )
    return user


def get_current_active_user(
    current_user: User = Depends(get_current_user),
) -> User:
    """
    Get the current active user.
    """
    if not user_service.is_active(current_user):
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="Inactive user",
        )
    return current_user


def get_current_active_superuser(
    current_user: User = Depends(get_current_active_user),
) -> User:
    """
    Get the current active superuser.
    """
    if not user_service.is_superuser(current_user):
        raise HTTPException(
            status_code=status.HTTP_403_FORBIDDEN,
            detail="The user doesn't have enough privileges",
        )
    return current_user