import tempfile
import unittest
from pathlib import Path

from app_config import load_config


class AppConfigTest(unittest.TestCase):
    def test_load_config_with_defaults(self):
        with tempfile.TemporaryDirectory() as tmp_dir:
            path = Path(tmp_dir) / "config.yaml"
            path.write_text(
                """
db:
  host: 127.0.0.1
  port: 5432
  database: test_db
  user: postgres
  password: secret
""".strip(),
                encoding="utf-8",
            )

            config = load_config(path)

        self.assertEqual(config.db.host, "127.0.0.1")
        self.assertEqual(config.db.port, 5432)
        self.assertEqual(config.modbus.host, "0.0.0.0")
        self.assertEqual(config.modbus.port, 502)
        self.assertEqual(config.modbus.interval, 5)
        self.assertEqual(config.logging.retention_days, 3)

    def test_load_modbus_interval(self):
        with tempfile.TemporaryDirectory() as tmp_dir:
            path = Path(tmp_dir) / "config.yaml"
            path.write_text(
                """
db:
  host: 127.0.0.1
  port: 5432
  database: test_db
  user: postgres
  password: secret
modbus:
  interval: 10
""".strip(),
                encoding="utf-8",
            )

            config = load_config(path)

        self.assertEqual(config.modbus.interval, 10)


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