import importlib.util
import pathlib
import unittest
from datetime import datetime


ROOT = pathlib.Path(__file__).resolve().parents[1]
MODULE_PATH = ROOT / "src" / "parser" / "publish_time.py"


def load_module():
    if not MODULE_PATH.exists():
        raise AssertionError("缺少文章发布时间规范化模块")
    spec = importlib.util.spec_from_file_location("publish_time", MODULE_PATH)
    module = importlib.util.module_from_spec(spec)
    spec.loader.exec_module(module)
    return module


class ArticlePublishTimeTest(unittest.TestCase):
    def setUp(self):
        self.module = load_module()
        self.now = datetime(2026, 8, 3, 15, 0, 0)

    def test_keeps_normal_publish_time_within_timezone_tolerance(self):
        value = self.module.normalize_published_at(
            "2026-08-03 23:01:04",
            now=self.now,
        )

        self.assertEqual(value, "2026-08-03 23:01:04")

    def test_rejects_clearly_future_publish_time(self):
        value = self.module.normalize_published_at(
            "2031-07-21 04:50:09",
            now=self.now,
        )

        self.assertEqual(value, "")

    def test_rejects_unparseable_publish_time(self):
        value = self.module.normalize_published_at("not-a-date", now=self.now)

        self.assertEqual(value, "")


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