"""Module for smooth light transitions."""

from __future__ import annotations

from typing import TYPE_CHECKING

from ...exceptions import KasaException
from ...feature import Feature
from ..smartmodule import SmartModule

if TYPE_CHECKING:
    from ..smartdevice import SmartDevice


class LightTransition(SmartModule):
    """Implementation of gradual on/off."""

    REQUIRED_COMPONENT = "on_off_gradually"
    QUERY_GETTER_NAME = "get_on_off_gradually_info"
    MAXIMUM_DURATION = 60

    def __init__(self, device: SmartDevice, module: str):
        super().__init__(device, module)
        self._create_features()

    def _create_features(self):
        """Create features based on the available version."""
        icon = "mdi:transition"
        if self.supported_version == 1:
            self._add_feature(
                Feature(
                    device=self._device,
                    container=self,
                    id="smooth_transitions",
                    name="Smooth transitions",
                    icon=icon,
                    attribute_getter="enabled_v1",
                    attribute_setter="set_enabled_v1",
                    type=Feature.Type.Switch,
                )
            )
        elif self.supported_version >= 2:
            # v2 adds separate on & off states
            # v3 adds max_duration
            # TODO: note, hardcoding the maximums for now as the features get
            #  initialized before the first update.
            self._add_feature(
                Feature(
                    self._device,
                    id="smooth_transition_on",
                    name="Smooth transition on",
                    container=self,
                    attribute_getter="turn_on_transition",
                    attribute_setter="set_turn_on_transition",
                    icon=icon,
                    type=Feature.Type.Number,
                    maximum_value=self.MAXIMUM_DURATION,
                )
            )  # self._turn_on_transition_max
            self._add_feature(
                Feature(
                    self._device,
                    id="smooth_transition_off",
                    name="Smooth transition off",
                    container=self,
                    attribute_getter="turn_off_transition",
                    attribute_setter="set_turn_off_transition",
                    icon=icon,
                    type=Feature.Type.Number,
                    maximum_value=self.MAXIMUM_DURATION,
                )
            )  # self._turn_off_transition_max

    @property
    def _turn_on(self):
        """Internal getter for turn on settings."""
        if "on_state" not in self.data:
            raise KasaException(
                f"Unsupported for {self.REQUIRED_COMPONENT} v{self.supported_version}"
            )

        return self.data["on_state"]

    @property
    def _turn_off(self):
        """Internal getter for turn off settings."""
        if "off_state" not in self.data:
            raise KasaException(
                f"Unsupported for {self.REQUIRED_COMPONENT} v{self.supported_version}"
            )

        return self.data["off_state"]

    async def set_enabled_v1(self, enable: bool):
        """Enable gradual on/off."""
        return await self.call("set_on_off_gradually_info", {"enable": enable})

    @property
    def enabled_v1(self) -> bool:
        """Return True if gradual on/off is enabled."""
        return bool(self.data["enable"])

    @property
    def turn_on_transition(self) -> int:
        """Return transition time for turning the light on.

        Available only from v2.
        """
        if "fade_on_time" in self._device.sys_info:
            return self._device.sys_info["fade_on_time"]
        return self._turn_on["duration"]

    @property
    def _turn_on_transition_max(self) -> int:
        """Maximum turn on duration."""
        # v3 added max_duration, we default to 60 when it's not available
        return self._turn_on.get("max_duration", 60)

    async def set_turn_on_transition(self, seconds: int):
        """Set turn on transition in seconds.

        Setting to 0 turns the feature off.
        """
        if seconds > self._turn_on_transition_max:
            raise ValueError(
                f"Value {seconds} out of range, max {self._turn_on_transition_max}"
            )

        if seconds <= 0:
            return await self.call(
                "set_on_off_gradually_info",
                {"on_state": {**self._turn_on, "enable": False}},
            )

        return await self.call(
            "set_on_off_gradually_info",
            {"on_state": {**self._turn_on, "duration": seconds}},
        )

    @property
    def turn_off_transition(self) -> int:
        """Return transition time for turning the light off.

        Available only from v2.
        """
        if "fade_off_time" in self._device.sys_info:
            return self._device.sys_info["fade_off_time"]
        return self._turn_off["duration"]

    @property
    def _turn_off_transition_max(self) -> int:
        """Maximum turn on duration."""
        # v3 added max_duration, we default to 60 when it's not available
        return self._turn_off.get("max_duration", 60)

    async def set_turn_off_transition(self, seconds: int):
        """Set turn on transition in seconds.

        Setting to 0 turns the feature off.
        """
        if seconds > self._turn_off_transition_max:
            raise ValueError(
                f"Value {seconds} out of range, max {self._turn_off_transition_max}"
            )

        if seconds <= 0:
            return await self.call(
                "set_on_off_gradually_info",
                {"off_state": {**self._turn_off, "enable": False}},
            )

        return await self.call(
            "set_on_off_gradually_info",
            {"off_state": {**self._turn_on, "duration": seconds}},
        )

    def query(self) -> dict:
        """Query to execute during the update cycle."""
        # Some devices have the required info in the device info.
        if "gradually_on_mode" in self._device.sys_info:
            return {}
        else:
            return {self.QUERY_GETTER_NAME: None}

    async def _check_supported(self):
        """Additional check to see if the module is supported by the device.

        Parent devices that report components of children such as ks240 will not have
        the brightness value is sysinfo.
        """
        # Look in _device.sys_info here because self.data is either sys_info or
        # get_preset_rules depending on whether it's a child device or not.
        return "brightness" in self._device.sys_info