import jwt

from sqlalchemy.orm import Session
from fastapi import Depends, HTTPException, status
from fastapi.security import OAuth2PasswordBearer

from app import models, schemas, crud
from app.utils.encrypt import decode_token
from app.database import SessionLocal

oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/api/auth/token")


def get_db():
    try:
        db = SessionLocal()
        yield db
    finally:
        db.close()

def get_current_user(
    db: Session = Depends(get_db), token: str = Depends(oauth2_scheme)
) -> models.User:
    try:
        payload = decode_token(token)
        print(payload)
    except jwt.JWTError:
        raise HTTPException(
            status_code=status.HTTP_403_FORBIDDEN,
            detail="Could not validate credentials",
        )
    user = crud.crud_user.get_user(db, username=payload.get("username"))
    if not user:
        raise HTTPException(status_code=404, detail="User not found")
    return user