"""Support for LG webOS Smart TV."""
from __future__ import annotations

from contextlib import suppress
import logging

from aiowebostv import WebOsClient, WebOsTvPairError
import voluptuous as vol

from homeassistant.components import notify as hass_notify
from homeassistant.config_entries import ConfigEntry
from homeassistant.const import (
    ATTR_COMMAND,
    ATTR_ENTITY_ID,
    CONF_CLIENT_SECRET,
    CONF_HOST,
    CONF_NAME,
    EVENT_HOMEASSISTANT_STOP,
)
from homeassistant.core import Event, HomeAssistant, ServiceCall
from homeassistant.helpers import config_validation as cv, discovery
from homeassistant.helpers.dispatcher import async_dispatcher_send
from homeassistant.helpers.typing import ConfigType

from .const import (
    ATTR_BUTTON,
    ATTR_CONFIG_ENTRY_ID,
    ATTR_PAYLOAD,
    ATTR_SOUND_OUTPUT,
    DATA_CONFIG_ENTRY,
    DATA_HASS_CONFIG,
    DOMAIN,
    PLATFORMS,
    SERVICE_BUTTON,
    SERVICE_COMMAND,
    SERVICE_SELECT_SOUND_OUTPUT,
    WEBOSTV_EXCEPTIONS,
)

CONFIG_SCHEMA = cv.removed(DOMAIN, raise_if_present=False)

CALL_SCHEMA = vol.Schema({vol.Required(ATTR_ENTITY_ID): cv.comp_entity_ids})

BUTTON_SCHEMA = CALL_SCHEMA.extend({vol.Required(ATTR_BUTTON): cv.string})

COMMAND_SCHEMA = CALL_SCHEMA.extend(
    {vol.Required(ATTR_COMMAND): cv.string, vol.Optional(ATTR_PAYLOAD): dict}
)

SOUND_OUTPUT_SCHEMA = CALL_SCHEMA.extend({vol.Required(ATTR_SOUND_OUTPUT): cv.string})

SERVICE_TO_METHOD = {
    SERVICE_BUTTON: {"method": "async_button", "schema": BUTTON_SCHEMA},
    SERVICE_COMMAND: {"method": "async_command", "schema": COMMAND_SCHEMA},
    SERVICE_SELECT_SOUND_OUTPUT: {
        "method": "async_select_sound_output",
        "schema": SOUND_OUTPUT_SCHEMA,
    },
}

_LOGGER = logging.getLogger(__name__)


async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
    """Set up the LG WebOS TV platform."""
    hass.data.setdefault(DOMAIN, {})
    hass.data[DOMAIN].setdefault(DATA_CONFIG_ENTRY, {})
    hass.data[DOMAIN][DATA_HASS_CONFIG] = config

    return True


async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
    """Set the config entry up."""
    host = entry.data[CONF_HOST]
    key = entry.data[CONF_CLIENT_SECRET]

    wrapper = WebOsClientWrapper(host, client_key=key)
    await wrapper.connect()

    async def async_service_handler(service: ServiceCall) -> None:
        method = SERVICE_TO_METHOD[service.service]
        data = service.data.copy()
        data["method"] = method["method"]
        async_dispatcher_send(hass, DOMAIN, data)

    for service, method in SERVICE_TO_METHOD.items():
        schema = method["schema"]
        hass.services.async_register(
            DOMAIN, service, async_service_handler, schema=schema
        )

    hass.data[DOMAIN][DATA_CONFIG_ENTRY][entry.entry_id] = wrapper
    await hass.config_entries.async_forward_entry_setups(entry, PLATFORMS)

    # set up notify platform, no entry support for notify component yet,
    # have to use discovery to load platform.
    hass.async_create_task(
        discovery.async_load_platform(
            hass,
            "notify",
            DOMAIN,
            {
                CONF_NAME: entry.title,
                ATTR_CONFIG_ENTRY_ID: entry.entry_id,
            },
            hass.data[DOMAIN][DATA_HASS_CONFIG],
        )
    )

    if not entry.update_listeners:
        entry.async_on_unload(entry.add_update_listener(async_update_options))

    async def async_on_stop(_event: Event) -> None:
        """Unregister callbacks and disconnect."""
        await wrapper.shutdown()

    entry.async_on_unload(
        hass.bus.async_listen_once(EVENT_HOMEASSISTANT_STOP, async_on_stop)
    )
    return True


async def async_update_options(hass: HomeAssistant, entry: ConfigEntry) -> None:
    """Update options."""
    await hass.config_entries.async_reload(entry.entry_id)


async def async_control_connect(host: str, key: str | None) -> WebOsClient:
    """LG Connection."""
    client = WebOsClient(host, key)
    try:
        await client.connect()
    except WebOsTvPairError:
        _LOGGER.warning("Connected to LG webOS TV %s but not paired", host)
        raise

    return client


async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
    """Unload a config entry."""
    unload_ok = await hass.config_entries.async_unload_platforms(entry, PLATFORMS)

    if unload_ok:
        client = hass.data[DOMAIN][DATA_CONFIG_ENTRY].pop(entry.entry_id)
        await hass_notify.async_reload(hass, DOMAIN)
        await client.shutdown()

    # unregister service calls, check if this is the last entry to unload
    if unload_ok and not hass.data[DOMAIN][DATA_CONFIG_ENTRY]:
        for service in SERVICE_TO_METHOD:
            hass.services.async_remove(DOMAIN, service)

    return unload_ok


class WebOsClientWrapper:
    """Wrapper for a WebOS TV client with Home Assistant specific functions."""

    def __init__(self, host: str, client_key: str) -> None:
        """Set up the client."""
        self.host = host
        self.client_key = client_key
        self.client: WebOsClient | None = None

    async def connect(self) -> None:
        """Attempt a connection, but fail gracefully if tv is off for example."""
        self.client = WebOsClient(self.host, self.client_key)
        with suppress(*WEBOSTV_EXCEPTIONS, WebOsTvPairError):
            await self.client.connect()

    async def shutdown(self) -> None:
        """Unregister callbacks and disconnect."""
        assert self.client
        self.client.clear_state_update_callbacks()
        await self.client.disconnect()