import importlib.util
import time
import unittest
from pathlib import Path


MODULE_PATH = Path(__file__).resolve().parents[1] / "core" / "simulated_device.py"
SPEC = importlib.util.spec_from_file_location("simulated_device_under_test", MODULE_PATH)
SIMULATED = importlib.util.module_from_spec(SPEC)
SPEC.loader.exec_module(SIMULATED)


class SimulatedDeviceTests(unittest.TestCase):
    def test_connect_read_and_write_without_hardware(self):
        device = SIMULATED.SimulatedDevice()
        self.assertTrue(device.connect())
        self.assertTrue(device.set_motor_position(0))
        self.assertIsInstance(device.get_pressure(), float)
        self.assertIsInstance(device.get_flow(), float)
        self.assertEqual(len(device.command_log), 1)
        device.disconnect()
        self.assertFalse(device.connected)

    def test_pressure_model_responds_to_valve_position(self):
        device = SIMULATED.SimulatedDevice()
        device.connect()
        device.set_motor_position(0)
        time.sleep(0.02)
        open_pressure = device.get_pressure()
        device.set_motor_position(1000)
        time.sleep(0.02)
        closed_pressure = device.get_pressure()
        self.assertGreaterEqual(open_pressure, 0.0)
        self.assertGreaterEqual(closed_pressure, 0.0)
        self.assertEqual(device.read_current_position(), 1000.0)
        device.disconnect()


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