"""Lightweight face-engine stub for CI (no InsightFace / ONNX load)."""
from __future__ import annotations

import threading
from typing import Any

import numpy as np


class StubFaceEngine:
    app = None
    lock = threading.Lock()

    def __init__(self):
        self.db: dict[str, np.ndarray] = {}

    def reload_db(self) -> None:
        with self.lock:
            self.db = {}

    def match_frame(self, frame: np.ndarray, threshold: float | None = None) -> dict[str, Any]:
        return {"found": False, "reason": "CI stub — face recognition disabled in CI"}

    def recognize(self, frame: np.ndarray) -> list[dict[str, Any]]:
        return []