import sys
import tempfile
import unittest
from pathlib import Path
from unittest.mock import patch

sys.path.insert(0, str(Path(__file__).resolve().parents[1] / 'scripts'))
import sync

class MirrorTests(unittest.TestCase):
    def test_index(self):
        self.assertEqual(len(sync.index_rows({'value': [{'ID': '2026-Nov'}]})), 1)
        with self.assertRaises(ValueError):
            sync.index_rows({'value': []})
    def test_update_and_idempotency(self):
        index = {'value': [{'ID': '2026-Nov', 'CurrentReleaseDate': '2026-11-10T00:00:00Z'}]}
        with tempfile.TemporaryDirectory() as t:
            with patch.object(sync, 'fetch', side_effect=[index, {'DocumentTitle': {'Value': 'test'}}]):
                sync.sync(Path(t), 2017, 45, False, 0)
            target = Path(t)/'data/cvrf/2026/2026-Nov.json'
            self.assertTrue(target.exists())
            with patch.object(sync, 'fetch', side_effect=[index, {'DocumentTitle': {'Value': 'test'}}]):
                sync.sync(Path(t), 2017, 45, False, 0)
            self.assertEqual(__import__('json').loads((Path(t)/'state/sync.json').read_text())['changed'], 0)
if __name__ == '__main__': unittest.main()