from fastapi import Depends, HTTPException, status
from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
from sqlalchemy.ext.asyncio import AsyncSession
from sqlalchemy import select
from app.core.database import get_db
from app.core.security import decode_token
from app.models.models import User

security = HTTPBearer()


async def get_current_user(
    credentials: HTTPAuthorizationCredentials = Depends(security),
    db: AsyncSession = Depends(get_db),
) -> User:
    token = credentials.credentials
    payload = decode_token(token)
    if not payload or payload.get("type") != "access":
        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid token")
    user_id = int(payload["sub"])
    result = await db.execute(select(User).where(User.id == user_id))
    user = result.scalar_one_or_none()
    if not user or user.status == "disabled":
        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="User not found or disabled")
    return user


async def require_admin(user: User = Depends(get_current_user)) -> User:
    if user.role != "admin":
        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="Admin required")
    return user