import asyncio
from types import SimpleNamespace

from app.auto.config import (
    TemperatureConfig,
)
from app.auto.controller import (
    AutoController,
)
from app.auto.temperature_policy import (
    TemperaturePolicy,
)


class FakeQingpingService:

    def __init__(self):

        self.online = True

        self.state = SimpleNamespace(
            temperature=19.4,
        )


class FakeTionController:

    def __init__(self):
        self.calls = []

    async def heater_on(self):
        self.calls.append(
            ("heater_on", None)
        )

    async def heater_off(self):
        self.calls.append(
            ("heater_off", None)
        )


class FakeTionService:

    def __init__(self):

        self.online = True

        self.state = SimpleNamespace(
            in_temp=18,
        )

        self.controller = (
            FakeTionController()
        )

    async def execute(
        self,
        operation,
    ):
        return await operation(
            self.controller
        )


def make_resolution(
    target_temp=20.0,
):

    return SimpleNamespace(
        scheduled_settings=(
            SimpleNamespace(
                target_temp=target_temp,
            )
        )
    )


def make_controller():

    qingping = (
        FakeQingpingService()
    )

    tion = FakeTionService()

    policy = TemperaturePolicy(
        TemperatureConfig(
            hysteresis=0.5,
        )
    )

    controller = AutoController(
        schedule_service=None,
        qingping_service=qingping,
        tion_service=tion,
        temperature_policy=policy,
    )

    return (
        controller,
        qingping,
        tion,
    )


async def test_qingping_heating():

    controller, qingping, tion = (
        make_controller()
    )

    resolution = make_resolution()

    # 19.4 < 19.5
    # Heater должен включиться.

    await controller._process_heater(
        resolution
    )

    assert tion.controller.calls == [
        ("heater_on", None)
    ]

    assert (
        controller._auto_heater
        is True
    )

    assert (
        controller._temperature
        == 19.4
    )

    assert (
        controller._temperature_source
        == "qingping"
    )

    tion.controller.calls.clear()

    # ----------------------------------------------
    # 19.8
    #
    # Heater уже ON.
    # До 20 градусов ещё не дошли.
    # Продолжаем греть.
    #
    # Новую команду отправлять не нужно.
    # ----------------------------------------------

    qingping.state.temperature = 19.8

    await controller._process_heater(
        resolution
    )

    assert tion.controller.calls == []

    assert (
        controller._auto_heater
        is True
    )

    # ----------------------------------------------
    # 20.0
    #
    # Цель достигнута.
    # ----------------------------------------------

    qingping.state.temperature = 20.0

    await controller._process_heater(
        resolution
    )

    assert tion.controller.calls == [
        ("heater_off", None)
    ]

    assert (
        controller._auto_heater
        is False
    )


async def test_tion_temperature_fallback():

    controller, qingping, tion = (
        make_controller()
    )

    resolution = make_resolution()

    # Qingping отключился.
    qingping.online = False

    # Используем Tion.
    tion.state.in_temp = 19

    await controller._process_heater(
        resolution
    )

    assert tion.controller.calls == [
        ("heater_on", None)
    ]

    assert (
        controller._temperature
        == 19
    )

    assert (
        controller._temperature_source
        == "tion"
    )

    assert (
        controller._auto_heater
        is True
    )


async def test_no_temperature():

    controller, qingping, tion = (
        make_controller()
    )

    resolution = make_resolution()

    qingping.online = False
    tion.online = False

    await controller._process_heater(
        resolution
    )

    assert tion.controller.calls == [
        ("heater_off", None)
    ]

    assert (
        controller._temperature
        is None
    )

    assert (
        controller._temperature_source
        is None
    )

    assert (
        controller._auto_heater
        is False
    )


async def test_target_temperature_missing():

    controller, qingping, tion = (
        make_controller()
    )

    resolution = make_resolution(
        target_temp=None
    )

    await controller._process_heater(
        resolution
    )

    assert tion.controller.calls == [
        ("heater_off", None)
    ]

    assert (
        controller._auto_heater
        is False
    )


async def main():

    await test_qingping_heating()

    await test_tion_temperature_fallback()

    await test_no_temperature()

    await test_target_temperature_missing()

    print()
    print("=" * 70)
    print(
        "ALL AUTO HEATER PROCESS "
        "TESTS PASSED"
    )
    print("=" * 70)


if __name__ == "__main__":
    asyncio.run(main())