"""uiautomator2 设备连接边界测试，不连接真机。"""

import threading
import unittest

from src.pdd_device_service import PddDeviceError, PddDeviceService


class FakeDevice:
    def app_current(self):
        return {"package": "com.xunmeng.pinduoduo"}


class PddDeviceServiceTest(unittest.TestCase):
    def test_connect_validates_and_releases_exclusive_session(self):
        connected = []
        service = PddDeviceService(lambda serial: connected.append(serial) or FakeDevice())

        with service.connect("USB-001") as device:
            self.assertIsInstance(device, FakeDevice)
            with self.assertRaisesRegex(PddDeviceError, "正在执行"):
                service.connect("USB-002")

        with service.connect("USB-002"):
            pass
        self.assertEqual(connected, ["USB-001", "USB-002"])

    def test_invalid_serial_is_rejected_before_connect(self):
        with self.assertRaisesRegex(PddDeviceError, "设备号无效") as raised:
            PddDeviceService(lambda _serial: FakeDevice()).connect("bad serial")
        self.assertEqual(raised.exception.code, "DEVICE_ADDRESS_INVALID")

    def test_offline_connector_error_has_specific_code(self):
        def fail(_serial):
            raise OSError("offline")

        with self.assertRaises(PddDeviceError) as raised:
            PddDeviceService(fail).connect("USB-001")
        self.assertEqual(raised.exception.code, "DEVICE_OFFLINE")
        self.assertIn("offline", raised.exception.message)

    def test_other_connector_error_becomes_connect_failed(self):
        def fail(_serial):
            raise OSError("permission denied")

        with self.assertRaises(PddDeviceError) as raised:
            PddDeviceService(fail).connect("USB-001")
        self.assertEqual(raised.exception.code, "DEVICE_CONNECT_FAILED")

    def test_device_object_cannot_be_used_from_another_thread(self):
        session = PddDeviceService(lambda _serial: FakeDevice()).connect("USB-001")
        errors = []

        def read_device():
            try:
                session.device
            except PddDeviceError as exc:
                errors.append(exc.code)

        worker = threading.Thread(target=read_device)
        worker.start()
        worker.join()
        session.__exit__(None, None, None)

        self.assertEqual(errors, ["DEVICE_THREAD_VIOLATION"])


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