import time
import unittest

from app.services.hardware import GPIOController


class GPIOControllerTests(unittest.TestCase):
    def setUp(self) -> None:
        GPIOController._reset_for_tests()

    def tearDown(self) -> None:
        GPIOController._reset_for_tests()

    def test_singleton_instance(self) -> None:
        c1 = GPIOController.get_instance(pin=18, simulation_mode=True)
        c2 = GPIOController.get_instance(pin=99, simulation_mode=False)
        self.assertIs(c1, c2)

    def test_on_off_state_transitions(self) -> None:
        ctrl = GPIOController.get_instance(pin=18, simulation_mode=True)
        self.assertFalse(ctrl.rpi_gpio_available)
        self.assertFalse(ctrl.is_on())

        ctrl.on()
        self.assertTrue(ctrl.is_on())

        ctrl.off()
        self.assertFalse(ctrl.is_on())

    def test_blink_runs_in_background_and_finishes_off(self) -> None:
        ctrl = GPIOController.get_instance(pin=18, simulation_mode=True)
        start = time.time()
        ctrl.blink(times=2, delay=0.02)
        # non-blocking start
        self.assertLess(time.time() - start, 0.05)
        time.sleep(0.15)
        self.assertFalse(ctrl.is_on())

    def test_stop_blink(self) -> None:
        ctrl = GPIOController.get_instance(pin=18, simulation_mode=True)
        ctrl.blink(times=10, delay=0.05)
        time.sleep(0.06)
        ctrl.stop_blink()
        self.assertFalse(ctrl.is_on())


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