from fastapi import Depends, HTTPException, status
from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
from typing import Optional
from utils.jwt import verify_token
from schemas.user import UserRead
import uuid

security = HTTPBearer()

def get_current_user(credentials: HTTPAuthorizationCredentials = Depends(security)):
    """
    Dependency to get the current user from the JWT token
    """
    token = credentials.credentials
    
    payload = verify_token(token)
    if payload is None:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Could not validate credentials",
            headers={"WWW-Authenticate": "Bearer"},
        )
    
    user_id_str = payload.get("sub")
    if user_id_str is None:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Could not validate credentials",
            headers={"WWW-Authenticate": "Bearer"},
        )
    
    try:
        user_id = uuid.UUID(user_id_str)
    except ValueError:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Invalid user ID in token",
            headers={"WWW-Authenticate": "Bearer"},
        )
    
    # Create a UserRead object with the user ID
    # In a real implementation, you would fetch the user from the database
    user = UserRead(id=user_id, email="", created_at=None, updated_at=None)
    return user