"""Support for Ness D8X/D16X devices."""
from collections import namedtuple
import datetime
import logging

from nessclient import ArmingState, Client
import voluptuous as vol

from homeassistant.components.binary_sensor import DEVICE_CLASSES
from homeassistant.const import (
    ATTR_CODE,
    ATTR_STATE,
    CONF_HOST,
    CONF_SCAN_INTERVAL,
    EVENT_HOMEASSISTANT_STOP,
)
from homeassistant.helpers import config_validation as cv
from homeassistant.helpers.discovery import async_load_platform
from homeassistant.helpers.dispatcher import async_dispatcher_send

_LOGGER = logging.getLogger(__name__)

DOMAIN = "ness_alarm"
DATA_NESS = "ness_alarm"

CONF_DEVICE_PORT = "port"
CONF_INFER_ARMING_STATE = "infer_arming_state"
CONF_ZONES = "zones"
CONF_ZONE_NAME = "name"
CONF_ZONE_TYPE = "type"
CONF_ZONE_ID = "id"
ATTR_OUTPUT_ID = "output_id"
DEFAULT_ZONES = []
DEFAULT_SCAN_INTERVAL = datetime.timedelta(minutes=1)
DEFAULT_INFER_ARMING_STATE = False

SIGNAL_ZONE_CHANGED = "ness_alarm.zone_changed"
SIGNAL_ARMING_STATE_CHANGED = "ness_alarm.arming_state_changed"

ZoneChangedData = namedtuple("ZoneChangedData", ["zone_id", "state"])

DEFAULT_ZONE_TYPE = "motion"
ZONE_SCHEMA = vol.Schema(
    {
        vol.Required(CONF_ZONE_NAME): cv.string,
        vol.Required(CONF_ZONE_ID): cv.positive_int,
        vol.Optional(CONF_ZONE_TYPE, default=DEFAULT_ZONE_TYPE): vol.In(DEVICE_CLASSES),
    }
)

CONFIG_SCHEMA = vol.Schema(
    {
        DOMAIN: vol.Schema(
            {
                vol.Required(CONF_HOST): cv.string,
                vol.Required(CONF_DEVICE_PORT): cv.port,
                vol.Optional(
                    CONF_SCAN_INTERVAL, default=DEFAULT_SCAN_INTERVAL
                ): vol.All(cv.time_period, cv.positive_timedelta),
                vol.Optional(CONF_ZONES, default=DEFAULT_ZONES): vol.All(
                    cv.ensure_list, [ZONE_SCHEMA]
                ),
                vol.Optional(
                    CONF_INFER_ARMING_STATE, default=DEFAULT_INFER_ARMING_STATE
                ): cv.boolean,
            }
        )
    },
    extra=vol.ALLOW_EXTRA,
)

SERVICE_PANIC = "panic"
SERVICE_AUX = "aux"

SERVICE_SCHEMA_PANIC = vol.Schema({vol.Required(ATTR_CODE): cv.string})
SERVICE_SCHEMA_AUX = vol.Schema(
    {
        vol.Required(ATTR_OUTPUT_ID): cv.positive_int,
        vol.Optional(ATTR_STATE, default=True): cv.boolean,
    }
)


async def async_setup(hass, config):
    """Set up the Ness Alarm platform."""

    conf = config[DOMAIN]

    zones = conf[CONF_ZONES]
    host = conf[CONF_HOST]
    port = conf[CONF_DEVICE_PORT]
    scan_interval = conf[CONF_SCAN_INTERVAL]
    infer_arming_state = conf[CONF_INFER_ARMING_STATE]

    client = Client(
        host=host,
        port=port,
        loop=hass.loop,
        update_interval=scan_interval.total_seconds(),
        infer_arming_state=infer_arming_state,
    )
    hass.data[DATA_NESS] = client

    async def _close(event):
        await client.close()

    hass.bus.async_listen_once(EVENT_HOMEASSISTANT_STOP, _close)

    hass.async_create_task(
        async_load_platform(hass, "binary_sensor", DOMAIN, {CONF_ZONES: zones}, config)
    )
    hass.async_create_task(
        async_load_platform(hass, "alarm_control_panel", DOMAIN, {}, config)
    )

    def on_zone_change(zone_id: int, state: bool):
        """Receives and propagates zone state updates."""
        async_dispatcher_send(
            hass, SIGNAL_ZONE_CHANGED, ZoneChangedData(zone_id=zone_id, state=state)
        )

    def on_state_change(arming_state: ArmingState):
        """Receives and propagates arming state updates."""
        async_dispatcher_send(hass, SIGNAL_ARMING_STATE_CHANGED, arming_state)

    client.on_zone_change(on_zone_change)
    client.on_state_change(on_state_change)

    # Force update for current arming status and current zone states
    hass.loop.create_task(client.keepalive())
    hass.loop.create_task(client.update())

    async def handle_panic(call):
        await client.panic(call.data[ATTR_CODE])

    async def handle_aux(call):
        await client.aux(call.data[ATTR_OUTPUT_ID], call.data[ATTR_STATE])

    hass.services.async_register(
        DOMAIN, SERVICE_PANIC, handle_panic, schema=SERVICE_SCHEMA_PANIC
    )
    hass.services.async_register(
        DOMAIN, SERVICE_AUX, handle_aux, schema=SERVICE_SCHEMA_AUX
    )

    return True
