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

import asyncio
import functools
from typing import Any

from pydantic import ValidationError
from pyunifiprotect.api import ProtectApiClient
from pyunifiprotect.exceptions import BadRequest
import voluptuous as vol

from homeassistant.config_entries import ConfigEntryState
from homeassistant.const import ATTR_DEVICE_ID
from homeassistant.core import HomeAssistant, ServiceCall, callback
from homeassistant.exceptions import HomeAssistantError
from homeassistant.helpers import config_validation as cv, device_registry as dr
from homeassistant.helpers.service import async_extract_referenced_entity_ids

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

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

ALL_GLOBAL_SERIVCES = [
    SERVICE_ADD_DOORBELL_TEXT,
    SERVICE_REMOVE_DOORBELL_TEXT,
    SERVICE_SET_DEFAULT_DOORBELL_TEXT,
]

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),
)


def _async_all_ufp_instances(hass: HomeAssistant) -> list[ProtectApiClient]:
    """All active UFP instances."""
    return [
        data.api for data in hass.data[DOMAIN].values() if isinstance(data, ProtectData)
    ]


@callback
def _async_unifi_mac_from_hass(mac: str) -> str:
    # MAC addresses in UFP are always caps
    return mac.replace(":", "").upper()


@callback
def _async_get_macs_for_device(device_entry: dr.DeviceEntry) -> list[str]:
    return [
        _async_unifi_mac_from_hass(cval)
        for ctype, cval in device_entry.connections
        if ctype == dr.CONNECTION_NETWORK_MAC
    ]


@callback
def _async_get_ufp_instances(
    hass: HomeAssistant, device_id: str
) -> tuple[dr.DeviceEntry, 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_instances(hass, device_entry.via_device_id)

    macs = _async_get_macs_for_device(device_entry)
    ufp_instances = [
        i for i in _async_all_ufp_instances(hass) if i.bootstrap.nvr.mac in macs
    ]

    if not ufp_instances:
        # should not be possible unless user manually enters a bad device ID
        raise HomeAssistantError(  # pragma: no cover
            f"No UniFi Protect NVR found for device ID: {device_id}"
        )

    return device_entry, ufp_instances[0]


@callback
def _async_get_protect_from_call(
    hass: HomeAssistant, call: ServiceCall
) -> list[tuple[dr.DeviceEntry, ProtectApiClient]]:
    referenced = async_extract_referenced_entity_ids(hass, call)

    instances: list[tuple[dr.DeviceEntry, ProtectApiClient]] = []
    for device_id in referenced.referenced_devices:
        instances.append(_async_get_ufp_instances(hass, device_id))

    return instances


async def _async_call_nvr(
    instances: list[tuple[dr.DeviceEntry, ProtectApiClient]],
    method: str,
    *args: Any,
    **kwargs: Any,
) -> None:
    try:
        await asyncio.gather(
            *(getattr(i.bootstrap.nvr, method)(*args, **kwargs) for _, i in instances)
        )
    except (BadRequest, 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]
    instances = _async_get_protect_from_call(hass, call)
    await _async_call_nvr(instances, "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]
    instances = _async_get_protect_from_call(hass, call)
    await _async_call_nvr(instances, "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]
    instances = _async_get_protect_from_call(hass, call)
    await _async_call_nvr(instances, "set_default_doorbell_message", message)


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,
        ),
    ]
    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)