from fastapi import Depends, HTTPException, status

from app.core.config import get_settings
from app.schemas.auth import AuthentikPrincipal
from app.security.authentik_jwt import require_authenticated_principal


def require_admin_principal(
    principal: AuthentikPrincipal = Depends(require_authenticated_principal),
) -> AuthentikPrincipal:
    settings = get_settings()
    allowed_emails = {email.lower() for email in settings.admin_allowlist_emails}
    allowed_subs = set(settings.admin_allowlist_subs)
    required_groups = {group.lower() for group in settings.admin_required_groups}

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

    email_ok = bool(principal.email and principal.email.lower() in allowed_emails)
    sub_ok = principal.sub in allowed_subs
    principal_groups = {group.lower() for group in principal.groups}
    group_ok = bool(required_groups.intersection(principal_groups))

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