from fastapi import Depends, HTTPException, status

from app.core.config import get_settings
from app.schemas.auth import KeycloakPrincipal
from app.security.idp_jwt import require_authenticated_principal


def require_admin_principal(
    principal: KeycloakPrincipal = Depends(require_authenticated_principal),
) -> KeycloakPrincipal:
    settings = get_settings()
    required_groups = {group.lower() for group in settings.admin_required_groups}

    if not required_groups:
        raise HTTPException(status_code=status.HTTP_503_SERVICE_UNAVAILABLE, detail="admin_policy_not_configured")

    principal_groups = {group.lower() for group in principal.groups}
    group_ok = bool(required_groups.intersection(principal_groups))

    if not group_ok:
        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="admin_forbidden")
    return principal