#!/usr/bin/env python3
"""Check review cleanup scope without Docker or build output."""
import json
import os
from pathlib import Path
import subprocess
import tempfile
import unittest

SCRIPT = Path(__file__).with_name('cleanup-review-images.sh')
SHA = 'a' * 40
FAKE_DOCKER = '''#!/usr/bin/env python3
import json, os, sys
args=sys.argv[1:]
with open(os.environ['DOCKER_CALLS'], 'a') as output:
    output.write(json.dumps(args)+'\\n')
if args[0]=='ps':
    if os.environ.get('FAIL_INVENTORY'): sys.exit(1)
    if os.environ.get('REFERENCED'): print('container-id')
elif args[0]=='inspect':
    print('sha256:review-image')
elif args[:2]==['image','inspect']:
    if os.environ.get('MISSING_IMAGE'): sys.exit(1)
    print('sha256:review-image')
'''


class ReviewCleanupTests(unittest.TestCase):
    def run_cleanup(self, sha=SHA, **extra):
        with tempfile.TemporaryDirectory() as directory:
            root = Path(directory)
            docker = root / 'docker'
            docker.write_text(FAKE_DOCKER)
            docker.chmod(0o700)
            calls = root / 'calls'
            result = subprocess.run(['bash', str(SCRIPT)], capture_output=True, env={
                **os.environ, 'PATH': directory + os.pathsep + os.environ['PATH'],
                'DOCKER_CALLS': str(calls), 'REVIEW_SHA': sha, **extra})
            return result.returncode, [json.loads(line) for line in calls.read_text().splitlines()] if calls.exists() else []

    def test_removes_only_exact_review_tags_without_force_and_keeps_parent_cache(self):
        code, calls = self.run_cleanup()
        self.assertEqual(code, 0)
        self.assertEqual([args for args in calls if args[:2] == ['image', 'rm']], [
            ['image', 'rm', '--no-prune', name + ':' + SHA] for name in
            ['creative-studio-review', 'creative-wiki-tests', 'creative-wiki-review']])
        self.assertFalse(any('-f' in args or 'prune' in args or 'volume' in args for args in calls))

    def test_invalid_sha_never_contacts_docker(self):
        for value in ['', 'main', 'a' * 39, 'a' * 41, 'A' * 40, '*' * 40]:
            with self.subTest(value=value):
                code, calls = self.run_cleanup(value)
                self.assertNotEqual(code, 0)
                self.assertEqual(calls, [])

    def test_container_referenced_images_are_kept(self):
        code, calls = self.run_cleanup(REFERENCED='1')
        self.assertEqual(code, 0)
        self.assertFalse(any(args[:2] == ['image', 'rm'] for args in calls))

    def test_missing_tags_are_a_successful_noop(self):
        code, calls = self.run_cleanup(MISSING_IMAGE='1')
        self.assertEqual(code, 0)
        self.assertFalse(any(args[:2] == ['image', 'rm'] for args in calls))

    def test_inventory_failure_prevents_removal(self):
        code, calls = self.run_cleanup(FAIL_INVENTORY='1')
        self.assertNotEqual(code, 0)
        self.assertEqual(len(calls), 1)


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