from fastapi import Depends, HTTPException, status
from fastapi.security import OAuth2PasswordBearer
from sqlalchemy.ext.asyncio import AsyncSession

from db.session import get_db
from core.jwt import decode_token
from domains.users.repo import get_user_by_id

oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/auth/login")


async def get_current_user(
    token: str = Depends(oauth2_scheme),
    db: AsyncSession = Depends(get_db),
):

    payload = decode_token(token)

    if payload is None:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Invalid authentication token",
        )

    user_id = payload.get("sub")

    user = await get_user_by_id(db, user_id)

    if not user:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="User not found",
        )

    return user


async def get_current_admin(user=Depends(get_current_user)):

    if user.role != "admin":
        raise HTTPException(
            status_code=status.HTTP_403_FORBIDDEN,
            detail="Admin privileges required",
        )

    return user