"""Code to handle a Hue bridge."""
from __future__ import annotations

import asyncio
from collections.abc import Callable
import logging
from typing import Any

from aiohttp import client_exceptions
from aiohue import HueBridgeV1, HueBridgeV2, LinkButtonNotPressed, Unauthorized
from aiohue.errors import AiohueException, BridgeBusy
import async_timeout

from homeassistant import core
from homeassistant.config_entries import SOURCE_IMPORT, ConfigEntry
from homeassistant.const import CONF_API_KEY, CONF_HOST, Platform
from homeassistant.exceptions import ConfigEntryNotReady
from homeassistant.helpers import aiohttp_client

from .const import CONF_API_VERSION, DOMAIN
from .v1.sensor_base import SensorManager
from .v2.device import async_setup_devices
from .v2.hue_event import async_setup_hue_events

# How long should we sleep if the hub is busy
HUB_BUSY_SLEEP = 0.5

PLATFORMS_v1 = [Platform.BINARY_SENSOR, Platform.LIGHT, Platform.SENSOR]
PLATFORMS_v2 = [
    Platform.BINARY_SENSOR,
    Platform.LIGHT,
    Platform.SCENE,
    Platform.SENSOR,
    Platform.SWITCH,
]


class HueBridge:
    """Manages a single Hue bridge."""

    def __init__(self, hass: core.HomeAssistant, config_entry: ConfigEntry) -> None:
        """Initialize the system."""
        self.config_entry = config_entry
        self.hass = hass
        self.authorized = False
        # Jobs to be executed when API is reset.
        self.reset_jobs: list[core.CALLBACK_TYPE] = []
        self.sensor_manager: SensorManager | None = None
        self.logger = logging.getLogger(__name__)
        # store actual api connection to bridge as api
        app_key: str = self.config_entry.data[CONF_API_KEY]
        websession = aiohttp_client.async_get_clientsession(hass)
        if self.api_version == 1:
            self.api = HueBridgeV1(self.host, app_key, websession)
        else:
            self.api = HueBridgeV2(self.host, app_key, websession)
        # store (this) bridge object in hass data
        hass.data.setdefault(DOMAIN, {})[self.config_entry.entry_id] = self

    @property
    def host(self) -> str:
        """Return the host of this bridge."""
        return self.config_entry.data[CONF_HOST]

    @property
    def api_version(self) -> int:
        """Return api version we're set-up for."""
        return self.config_entry.data[CONF_API_VERSION]

    async def async_initialize_bridge(self) -> bool:
        """Initialize Connection with the Hue API."""
        try:
            with async_timeout.timeout(10):
                await self.api.initialize()

        except (LinkButtonNotPressed, Unauthorized):
            # Usernames can become invalid if hub is reset or user removed.
            # We are going to fail the config entry setup and initiate a new
            # linking procedure. When linking succeeds, it will remove the
            # old config entry.
            create_config_flow(self.hass, self.host)
            return False
        except (
            asyncio.TimeoutError,
            client_exceptions.ClientOSError,
            client_exceptions.ServerDisconnectedError,
            client_exceptions.ContentTypeError,
            BridgeBusy,
        ) as err:
            raise ConfigEntryNotReady(
                f"Error connecting to the Hue bridge at {self.host}"
            ) from err
        except Exception:  # pylint: disable=broad-except
            self.logger.exception("Unknown error connecting to Hue bridge")
            return False

        # v1 specific initialization/setup code here
        if self.api_version == 1:
            if self.api.sensors is not None:
                self.sensor_manager = SensorManager(self)
            self.hass.config_entries.async_setup_platforms(
                self.config_entry, PLATFORMS_v1
            )

        # v2 specific initialization/setup code here
        else:
            await async_setup_devices(self)
            await async_setup_hue_events(self)
            self.hass.config_entries.async_setup_platforms(
                self.config_entry, PLATFORMS_v2
            )

        # add listener for config entry updates.
        self.reset_jobs.append(self.config_entry.add_update_listener(_update_listener))
        self.authorized = True
        return True

    async def async_request_call(
        self, task: Callable, *args, allowed_errors: list[str] | None = None, **kwargs
    ) -> Any:
        """Send request to the Hue bridge, optionally omitting error(s)."""
        try:
            return await task(*args, **kwargs)
        except AiohueException as err:
            # The (new) Hue api can be a bit fanatic with throwing errors
            # some of which we accept in certain conditions
            # handle that here. Note that these errors are strings and do not have
            # an identifier or something.
            if allowed_errors is not None and str(err) in allowed_errors:
                # log only
                self.logger.debug("Ignored error/warning from Hue API: %s", str(err))
                return None
            raise err

    async def async_reset(self) -> bool:
        """Reset this bridge to default state.

        Will cancel any scheduled setup retry and will unload
        the config entry.
        """
        # The bridge can be in 3 states:
        #  - Setup was successful, self.api is not None
        #  - Authentication was wrong, self.api is None, not retrying setup.

        # If the authentication was wrong.
        if self.api is None:
            return True

        while self.reset_jobs:
            self.reset_jobs.pop()()

        # Unload platforms
        unload_success = await self.hass.config_entries.async_unload_platforms(
            self.config_entry, PLATFORMS_v1 if self.api_version == 1 else PLATFORMS_v2
        )

        if unload_success:
            self.hass.data[DOMAIN].pop(self.config_entry.entry_id)

        return unload_success

    async def handle_unauthorized_error(self) -> None:
        """Create a new config flow when the authorization is no longer valid."""
        if not self.authorized:
            # we already created a new config flow, no need to do it again
            return
        self.logger.error(
            "Unable to authorize to bridge %s, setup the linking again", self.host
        )
        self.authorized = False
        create_config_flow(self.hass, self.host)


async def _update_listener(hass: core.HomeAssistant, entry: ConfigEntry) -> None:
    """Handle ConfigEntry options update."""
    await hass.config_entries.async_reload(entry.entry_id)


def create_config_flow(hass: core.HomeAssistant, host: str) -> None:
    """Start a config flow."""
    hass.async_create_task(
        hass.config_entries.flow.async_init(
            DOMAIN,
            context={"source": SOURCE_IMPORT},
            data={"host": host},
        )
    )