"""Support for Plaato devices."""

import asyncio
from datetime import timedelta
import logging

from aiohttp import web
from pyplaato.models.airlock import PlaatoAirlock
from pyplaato.plaato import (
    ATTR_ABV,
    ATTR_BATCH_VOLUME,
    ATTR_BPM,
    ATTR_BUBBLES,
    ATTR_CO2_VOLUME,
    ATTR_DEVICE_ID,
    ATTR_DEVICE_NAME,
    ATTR_OG,
    ATTR_SG,
    ATTR_TEMP,
    ATTR_TEMP_UNIT,
    ATTR_VOLUME_UNIT,
    Plaato,
    PlaatoDeviceType,
)
import voluptuous as vol

from homeassistant.components.sensor import DOMAIN as SENSOR
from homeassistant.config_entries import ConfigEntry
from homeassistant.const import (
    CONF_SCAN_INTERVAL,
    CONF_TOKEN,
    CONF_WEBHOOK_ID,
    HTTP_OK,
    TEMP_CELSIUS,
    TEMP_FAHRENHEIT,
    VOLUME_GALLONS,
    VOLUME_LITERS,
)
from homeassistant.core import HomeAssistant, callback
from homeassistant.helpers import aiohttp_client
import homeassistant.helpers.config_validation as cv
from homeassistant.helpers.dispatcher import async_dispatcher_send
from homeassistant.helpers.update_coordinator import DataUpdateCoordinator

from .const import (
    CONF_DEVICE_NAME,
    CONF_DEVICE_TYPE,
    CONF_USE_WEBHOOK,
    COORDINATOR,
    DEFAULT_SCAN_INTERVAL,
    DEVICE,
    DEVICE_ID,
    DEVICE_NAME,
    DEVICE_TYPE,
    DOMAIN,
    PLATFORMS,
    SENSOR_DATA,
    UNDO_UPDATE_LISTENER,
)

_LOGGER = logging.getLogger(__name__)

DEPENDENCIES = ["webhook"]

SENSOR_UPDATE = f"{DOMAIN}_sensor_update"
SENSOR_DATA_KEY = f"{DOMAIN}.{SENSOR}"

WEBHOOK_SCHEMA = vol.Schema(
    {
        vol.Required(ATTR_DEVICE_NAME): cv.string,
        vol.Required(ATTR_DEVICE_ID): cv.positive_int,
        vol.Required(ATTR_TEMP_UNIT): vol.Any(TEMP_CELSIUS, TEMP_FAHRENHEIT),
        vol.Required(ATTR_VOLUME_UNIT): vol.Any(VOLUME_LITERS, VOLUME_GALLONS),
        vol.Required(ATTR_BPM): cv.positive_int,
        vol.Required(ATTR_TEMP): vol.Coerce(float),
        vol.Required(ATTR_SG): vol.Coerce(float),
        vol.Required(ATTR_OG): vol.Coerce(float),
        vol.Required(ATTR_ABV): vol.Coerce(float),
        vol.Required(ATTR_CO2_VOLUME): vol.Coerce(float),
        vol.Required(ATTR_BATCH_VOLUME): vol.Coerce(float),
        vol.Required(ATTR_BUBBLES): cv.positive_int,
    },
    extra=vol.ALLOW_EXTRA,
)


async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry):
    """Configure based on config entry."""
    hass.data.setdefault(DOMAIN, {})
    use_webhook = entry.data[CONF_USE_WEBHOOK]

    if use_webhook:
        async_setup_webhook(hass, entry)
    else:
        await async_setup_coordinator(hass, entry)

    for platform in PLATFORMS:
        if entry.options.get(platform, True):
            hass.async_create_task(
                hass.config_entries.async_forward_entry_setup(entry, platform)
            )

    return True


@callback
def async_setup_webhook(hass: HomeAssistant, entry: ConfigEntry):
    """Init webhook based on config entry."""
    webhook_id = entry.data[CONF_WEBHOOK_ID]
    device_name = entry.data[CONF_DEVICE_NAME]

    _set_entry_data(entry, hass)

    hass.components.webhook.async_register(
        DOMAIN, f"{DOMAIN}.{device_name}", webhook_id, handle_webhook
    )


async def async_setup_coordinator(hass: HomeAssistant, entry: ConfigEntry):
    """Init auth token based on config entry."""
    auth_token = entry.data[CONF_TOKEN]
    device_type = entry.data[CONF_DEVICE_TYPE]

    if entry.options.get(CONF_SCAN_INTERVAL):
        update_interval = timedelta(minutes=entry.options[CONF_SCAN_INTERVAL])
    else:
        update_interval = timedelta(minutes=DEFAULT_SCAN_INTERVAL)

    coordinator = PlaatoCoordinator(hass, auth_token, device_type, update_interval)
    await coordinator.async_config_entry_first_refresh()

    _set_entry_data(entry, hass, coordinator, auth_token)

    for platform in PLATFORMS:
        if entry.options.get(platform, True):
            coordinator.platforms.append(platform)


def _set_entry_data(entry, hass, coordinator=None, device_id=None):
    device = {
        DEVICE_NAME: entry.data[CONF_DEVICE_NAME],
        DEVICE_TYPE: entry.data[CONF_DEVICE_TYPE],
        DEVICE_ID: device_id,
    }

    hass.data[DOMAIN][entry.entry_id] = {
        COORDINATOR: coordinator,
        DEVICE: device,
        SENSOR_DATA: None,
        UNDO_UPDATE_LISTENER: entry.add_update_listener(_async_update_listener),
    }


async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry):
    """Unload a config entry."""
    use_webhook = entry.data[CONF_USE_WEBHOOK]
    hass.data[DOMAIN][entry.entry_id][UNDO_UPDATE_LISTENER]()

    if use_webhook:
        return await async_unload_webhook(hass, entry)

    return await async_unload_coordinator(hass, entry)


async def async_unload_webhook(hass: HomeAssistant, entry: ConfigEntry):
    """Unload webhook based entry."""
    if entry.data[CONF_WEBHOOK_ID] is not None:
        hass.components.webhook.async_unregister(entry.data[CONF_WEBHOOK_ID])
    return await async_unload_platforms(hass, entry, PLATFORMS)


async def async_unload_coordinator(hass: HomeAssistant, entry: ConfigEntry):
    """Unload auth token based entry."""
    coordinator = hass.data[DOMAIN][entry.entry_id][COORDINATOR]
    return await async_unload_platforms(hass, entry, coordinator.platforms)


async def async_unload_platforms(hass: HomeAssistant, entry: ConfigEntry, platforms):
    """Unload platforms."""
    unloaded = all(
        await asyncio.gather(
            *[
                hass.config_entries.async_forward_entry_unload(entry, platform)
                for platform in platforms
            ]
        )
    )
    if unloaded:
        hass.data[DOMAIN].pop(entry.entry_id)

    return unloaded


async def _async_update_listener(hass: HomeAssistant, entry: ConfigEntry):
    """Handle options update."""
    await hass.config_entries.async_reload(entry.entry_id)


async def handle_webhook(hass, webhook_id, request):
    """Handle incoming webhook from Plaato."""
    try:
        data = WEBHOOK_SCHEMA(await request.json())
    except vol.MultipleInvalid as error:
        _LOGGER.warning("An error occurred when parsing webhook data <%s>", error)
        return

    device_id = _device_id(data)
    sensor_data = PlaatoAirlock.from_web_hook(data)

    async_dispatcher_send(hass, SENSOR_UPDATE, *(device_id, sensor_data))

    return web.Response(text=f"Saving status for {device_id}", status=HTTP_OK)


def _device_id(data):
    """Return name of device sensor."""
    return f"{data.get(ATTR_DEVICE_NAME)}_{data.get(ATTR_DEVICE_ID)}"


class PlaatoCoordinator(DataUpdateCoordinator):
    """Class to manage fetching data from the API."""

    def __init__(
        self,
        hass,
        auth_token,
        device_type: PlaatoDeviceType,
        update_interval: timedelta,
    ):
        """Initialize."""
        self.api = Plaato(auth_token=auth_token)
        self.hass = hass
        self.device_type = device_type
        self.platforms = []

        super().__init__(
            hass,
            _LOGGER,
            name=DOMAIN,
            update_interval=update_interval,
        )

    async def _async_update_data(self):
        """Update data via library."""
        data = await self.api.get_data(
            session=aiohttp_client.async_get_clientsession(self.hass),
            device_type=self.device_type,
        )
        return data