"""Tests for DetectionTracker multi-camera stream isolation."""

from __future__ import annotations

import unittest
from pathlib import Path
from unittest.mock import MagicMock, patch

from chicken_counter.config import load_camera_config


class MultiCameraTrackerIsolationTests(unittest.TestCase):
    def test_independent_stream_trackers(self) -> None:
        cfg = load_camera_config("configs/cameras/example_camera.yaml")
        
        # Test get_or_create_tracker instantiates isolated instances for different stream IDs
        with patch("chicken_counter.tracking.ensure_compatible_model", return_value=cfg.detection.model_path), \
             patch("chicken_counter.tracking.YOLO"):
            from chicken_counter.tracking import DetectionTracker

            tracker_manager = DetectionTracker(cfg)
            tr1 = tracker_manager.get_or_create_tracker("CC1")
            tr2 = tracker_manager.get_or_create_tracker("CC2")

            self.assertIsNotNone(tr1)
            self.assertIsNotNone(tr2)
            self.assertIsNot(tr1, tr2, "Trackers for CC1 and CC2 must be distinct objects")

            # Resetting CC1 should not delete CC2 tracker
            tracker_manager.reset_tracking("CC1")
            self.assertNotIn("CC1", tracker_manager._stream_trackers)
            self.assertIn("CC2", tracker_manager._stream_trackers)


if __name__ == "__main__":
    unittest.main()