import os
import unittest
from unittest.mock import patch

from docutranslate import app


class ServiceStartupTest(unittest.TestCase):
    @patch.dict(os.environ, {"DOCUTRANSLATE_STRICT_PORT": "1"}, clear=False)
    @patch.object(app, "find_free_port", return_value=8011)
    def test_strict_port_rejects_occupied_configured_port(self, _find_free_port):
        with self.assertRaisesRegex(RuntimeError, "端口 8010 已被占用"):
            app.run_app(host="127.0.0.1", port=8010)

    @patch.dict(os.environ, {"DOCUTRANSLATE_STRICT_PORT": ""}, clear=False)
    @patch.object(app.uvicorn, "run")
    @patch.object(app, "find_free_port", return_value=8011)
    def test_interactive_mode_can_still_fall_back_to_free_port(
        self, _find_free_port, uvicorn_run
    ):
        app.run_app(host="127.0.0.1", port=8010)
        uvicorn_run.assert_called_once_with(
            app.app, host="127.0.0.1", port=8011, workers=1
        )


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