"""Exercise the real scanner: monitoring exceptions must be scoped and expire."""
import os
from pathlib import Path
import shutil
import subprocess
import tempfile
import unittest

ROOT = Path(__file__).resolve().parents[2]
TRIVY = os.environ.get('TRIVY_BIN') or shutil.which('trivy')


@unittest.skipUnless(TRIVY, 'Trivy is required for scanner policy integration checks')
class TrivyPolicy(unittest.TestCase):
    def test_exception_does_not_cover_other_paths_or_survive_expiration(self):
        with tempfile.TemporaryDirectory() as directory:
            root = Path(directory)
            relative = Path('infra/prod/k8s/monitoring/04-node-exporter.yaml')
            approved = root / relative
            approved.parent.mkdir(parents=True)
            shutil.copyfile(ROOT / relative, approved)
            policy = root / '.trivyignore.yaml'
            policy.write_text((ROOT / '.trivyignore.yaml').read_text())

            def scan():
                result = subprocess.run(
                    [TRIVY, 'config', '--skip-check-update', '--severity', 'HIGH,CRITICAL',
                     '--ignorefile', str(policy), '--exit-code', '1', '--format', 'json',
                     str(root)], capture_output=True, text=True, timeout=60)
                # A scanner crash or invalid report cannot count as a successful rejection.
                import json
                report = json.loads(result.stdout)
                self.assertIn('Results', report)
                return result.returncode

            self.assertEqual(scan(), 0, 'Approved monitoring policy should pass before expiry')
            other = root / 'unapproved.yaml'
            approved.rename(other)
            self.assertEqual(scan(), 1, 'The same access outside the approved path must fail')
            other.rename(approved)
            policy.write_text(policy.read_text().replace('2026-10-24', '2000-01-01'))
            self.assertEqual(scan(), 1, 'Expired exceptions must fail closed')