"""UniFi Protect Integration services."""
from __future__ import annotations

import asyncio
import functools
from typing import Any, cast

from pydantic import ValidationError
from pyunifiprotect.api import ProtectApiClient
from pyunifiprotect.data import Chime
from pyunifiprotect.exceptions import ClientError
import voluptuous as vol

from homeassistant.components.binary_sensor import BinarySensorDeviceClass
from homeassistant.config_entries import ConfigEntryState
from homeassistant.const import ATTR_DEVICE_ID, Platform
from homeassistant.core import HomeAssistant, ServiceCall, callback
from homeassistant.exceptions import HomeAssistantError
from homeassistant.helpers import (
    config_validation as cv,
    device_registry as dr,
    entity_registry as er,
)
from homeassistant.helpers.service import async_extract_referenced_entity_ids
from homeassistant.util.read_only_dict import ReadOnlyDict

from .const import ATTR_MESSAGE, DOMAIN
from .data import async_ufp_instance_for_config_entry_ids

SERVICE_ADD_DOORBELL_TEXT = "add_doorbell_text"
SERVICE_REMOVE_DOORBELL_TEXT = "remove_doorbell_text"
SERVICE_SET_DEFAULT_DOORBELL_TEXT = "set_default_doorbell_text"
SERVICE_SET_CHIME_PAIRED = "set_chime_paired_doorbells"

ALL_GLOBAL_SERIVCES = [
    SERVICE_ADD_DOORBELL_TEXT,
    SERVICE_REMOVE_DOORBELL_TEXT,
    SERVICE_SET_DEFAULT_DOORBELL_TEXT,
    SERVICE_SET_CHIME_PAIRED,
]

DOORBELL_TEXT_SCHEMA = vol.All(
    vol.Schema(
        {
            **cv.ENTITY_SERVICE_FIELDS,
            vol.Required(ATTR_MESSAGE): cv.string,
        },
    ),
    cv.has_at_least_one_key(ATTR_DEVICE_ID),
)

CHIME_PAIRED_SCHEMA = vol.All(
    vol.Schema(
        {
            **cv.ENTITY_SERVICE_FIELDS,
            "doorbells": cv.TARGET_SERVICE_FIELDS,
        },
    ),
    cv.has_at_least_one_key(ATTR_DEVICE_ID),
)


@callback
def _async_get_ufp_instance(hass: HomeAssistant, device_id: str) -> ProtectApiClient:
    device_registry = dr.async_get(hass)
    if not (device_entry := device_registry.async_get(device_id)):
        raise HomeAssistantError(f"No device found for device id: {device_id}")

    if device_entry.via_device_id is not None:
        return _async_get_ufp_instance(hass, device_entry.via_device_id)

    config_entry_ids = device_entry.config_entries
    if ufp_instance := async_ufp_instance_for_config_entry_ids(hass, config_entry_ids):
        return ufp_instance

    raise HomeAssistantError(f"No device found for device id: {device_id}")


@callback
def _async_get_protect_from_call(
    hass: HomeAssistant, call: ServiceCall
) -> set[ProtectApiClient]:
    return {
        _async_get_ufp_instance(hass, device_id)
        for device_id in async_extract_referenced_entity_ids(
            hass, call
        ).referenced_devices
    }


async def _async_service_call_nvr(
    hass: HomeAssistant,
    call: ServiceCall,
    method: str,
    *args: Any,
    **kwargs: Any,
) -> None:
    instances = _async_get_protect_from_call(hass, call)
    try:
        await asyncio.gather(
            *(getattr(i.bootstrap.nvr, method)(*args, **kwargs) for i in instances)
        )
    except (ClientError, ValidationError) as err:
        raise HomeAssistantError(str(err)) from err


async def add_doorbell_text(hass: HomeAssistant, call: ServiceCall) -> None:
    """Add a custom doorbell text message."""
    message: str = call.data[ATTR_MESSAGE]
    await _async_service_call_nvr(hass, call, "add_custom_doorbell_message", message)


async def remove_doorbell_text(hass: HomeAssistant, call: ServiceCall) -> None:
    """Remove a custom doorbell text message."""
    message: str = call.data[ATTR_MESSAGE]
    await _async_service_call_nvr(hass, call, "remove_custom_doorbell_message", message)


async def set_default_doorbell_text(hass: HomeAssistant, call: ServiceCall) -> None:
    """Set the default doorbell text message."""
    message: str = call.data[ATTR_MESSAGE]
    await _async_service_call_nvr(hass, call, "set_default_doorbell_message", message)


@callback
def _async_unique_id_to_mac(unique_id: str) -> str:
    """Extract the MAC address from the registry entry unique id."""
    return unique_id.split("_")[0]


async def set_chime_paired_doorbells(hass: HomeAssistant, call: ServiceCall) -> None:
    """Set paired doorbells on chime."""
    ref = async_extract_referenced_entity_ids(hass, call)
    entity_registry = er.async_get(hass)

    entity_id = ref.indirectly_referenced.pop()
    chime_button = entity_registry.async_get(entity_id)
    assert chime_button is not None
    assert chime_button.device_id is not None
    chime_mac = _async_unique_id_to_mac(chime_button.unique_id)

    instance = _async_get_ufp_instance(hass, chime_button.device_id)
    chime = instance.bootstrap.get_device_from_mac(chime_mac)
    chime = cast(Chime, chime)
    assert chime is not None

    call.data = ReadOnlyDict(call.data.get("doorbells") or {})
    doorbell_refs = async_extract_referenced_entity_ids(hass, call)
    doorbell_ids: set[str] = set()
    for camera_id in doorbell_refs.referenced | doorbell_refs.indirectly_referenced:
        doorbell_sensor = entity_registry.async_get(camera_id)
        assert doorbell_sensor is not None
        if (
            doorbell_sensor.platform != DOMAIN
            or doorbell_sensor.domain != Platform.BINARY_SENSOR
            or doorbell_sensor.original_device_class
            != BinarySensorDeviceClass.OCCUPANCY
        ):
            continue
        doorbell_mac = _async_unique_id_to_mac(doorbell_sensor.unique_id)
        camera = instance.bootstrap.get_device_from_mac(doorbell_mac)
        assert camera is not None
        doorbell_ids.add(camera.id)
    data_before_changed = chime.dict_with_excludes()
    chime.camera_ids = sorted(doorbell_ids)
    await chime.save_device(data_before_changed)


def async_setup_services(hass: HomeAssistant) -> None:
    """Set up the global UniFi Protect services."""
    services = [
        (
            SERVICE_ADD_DOORBELL_TEXT,
            functools.partial(add_doorbell_text, hass),
            DOORBELL_TEXT_SCHEMA,
        ),
        (
            SERVICE_REMOVE_DOORBELL_TEXT,
            functools.partial(remove_doorbell_text, hass),
            DOORBELL_TEXT_SCHEMA,
        ),
        (
            SERVICE_SET_DEFAULT_DOORBELL_TEXT,
            functools.partial(set_default_doorbell_text, hass),
            DOORBELL_TEXT_SCHEMA,
        ),
        (
            SERVICE_SET_CHIME_PAIRED,
            functools.partial(set_chime_paired_doorbells, hass),
            CHIME_PAIRED_SCHEMA,
        ),
    ]
    for name, method, schema in services:
        if hass.services.has_service(DOMAIN, name):
            continue
        hass.services.async_register(DOMAIN, name, method, schema=schema)


def async_cleanup_services(hass: HomeAssistant) -> None:
    """Cleanup global UniFi Protect services (if all config entries unloaded)."""
    loaded_entries = [
        entry
        for entry in hass.config_entries.async_entries(DOMAIN)
        if entry.state == ConfigEntryState.LOADED
    ]
    if len(loaded_entries) == 1:
        for name in ALL_GLOBAL_SERIVCES:
            hass.services.async_remove(DOMAIN, name)