"""Support for Nuimo device over Bluetooth LE."""
import logging
import threading
import time

import voluptuous as vol

import homeassistant.helpers.config_validation as cv
from homeassistant.const import CONF_MAC, CONF_NAME, EVENT_HOMEASSISTANT_STOP

_LOGGER = logging.getLogger(__name__)

DOMAIN = "nuimo_controller"
EVENT_NUIMO = "nuimo_input"

DEFAULT_NAME = "None"

CONFIG_SCHEMA = vol.Schema(
    {
        DOMAIN: vol.Schema(
            {
                vol.Optional(CONF_MAC): cv.string,
                vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string,
            }
        )
    },
    extra=vol.ALLOW_EXTRA,
)

SERVICE_NUIMO = "led_matrix"
DEFAULT_INTERVAL = 2.0

SERVICE_NUIMO_SCHEMA = vol.Schema(
    {
        vol.Required("matrix"): cv.string,
        vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string,
        vol.Optional("interval", default=DEFAULT_INTERVAL): float,
    }
)

DEFAULT_ADAPTER = "hci0"


def setup(hass, config):
    """Set up the Nuimo component."""
    conf = config[DOMAIN]
    mac = conf.get(CONF_MAC)
    name = conf.get(CONF_NAME)
    NuimoThread(hass, mac, name).start()
    return True


class NuimoLogger:
    """Handle Nuimo Controller event callbacks."""

    def __init__(self, hass, name):
        """Initialize Logger object."""
        self._hass = hass
        self._name = name

    def received_gesture_event(self, event):
        """Input Event received."""
        _LOGGER.debug(
            "Received event: name=%s, gesture_id=%s,value=%s",
            event.name,
            event.gesture,
            event.value,
        )
        self._hass.bus.fire(
            EVENT_NUIMO, {"type": event.name, "value": event.value, "name": self._name}
        )


class NuimoThread(threading.Thread):
    """Manage one Nuimo controller."""

    def __init__(self, hass, mac, name):
        """Initialize thread object."""
        super(NuimoThread, self).__init__()
        self._hass = hass
        self._mac = mac
        self._name = name
        self._hass_is_running = True
        self._nuimo = None
        hass.bus.listen_once(EVENT_HOMEASSISTANT_STOP, self.stop)

    def run(self):
        """Set up the connection or be idle."""
        while self._hass_is_running:
            if not self._nuimo or not self._nuimo.is_connected():
                self._attach()
                self._connect()
            else:
                time.sleep(1)

        if self._nuimo:
            self._nuimo.disconnect()
            self._nuimo = None

    def stop(self, event):
        """Terminate Thread by unsetting flag."""
        _LOGGER.debug("Stopping thread for Nuimo %s", self._mac)
        self._hass_is_running = False

    def _attach(self):
        """Create a Nuimo object from MAC address or discovery."""
        # pylint: disable=import-error
        from nuimo import NuimoController, NuimoDiscoveryManager

        if self._nuimo:
            self._nuimo.disconnect()
            self._nuimo = None

        if self._mac:
            self._nuimo = NuimoController(self._mac)
        else:
            nuimo_manager = NuimoDiscoveryManager(
                bluetooth_adapter=DEFAULT_ADAPTER, delegate=DiscoveryLogger()
            )
            nuimo_manager.start_discovery()
            # Were any Nuimos found?
            if not nuimo_manager.nuimos:
                _LOGGER.debug("No Nuimo devices detected")
                return
            # Take the first Nuimo found.
            self._nuimo = nuimo_manager.nuimos[0]
            self._mac = self._nuimo.addr

    def _connect(self):
        """Build up connection and set event delegator and service."""
        if not self._nuimo:
            return

        try:
            self._nuimo.connect()
            _LOGGER.debug("Connected to %s", self._mac)
        except RuntimeError as error:
            _LOGGER.error("Could not connect to %s: %s", self._mac, error)
            time.sleep(1)
            return

        nuimo_event_delegate = NuimoLogger(self._hass, self._name)
        self._nuimo.set_delegate(nuimo_event_delegate)

        def handle_write_matrix(call):
            """Handle led matrix service."""
            matrix = call.data.get("matrix", None)
            name = call.data.get(CONF_NAME, DEFAULT_NAME)
            interval = call.data.get("interval", DEFAULT_INTERVAL)
            if self._name == name and matrix:
                self._nuimo.write_matrix(matrix, interval)

        self._hass.services.register(
            DOMAIN, SERVICE_NUIMO, handle_write_matrix, schema=SERVICE_NUIMO_SCHEMA
        )

        self._nuimo.write_matrix(HOMEASSIST_LOGO, 2.0)


# must be 9x9 matrix
HOMEASSIST_LOGO = (
    "    .    "
    + "   ...   "
    + "  .....  "
    + " ....... "
    + "..... ..."
    + " ....... "
    + " .. .... "
    + " .. .... "
    + "........."
)


class DiscoveryLogger:
    """Handle Nuimo Discovery callbacks."""

    # pylint: disable=no-self-use
    def discovery_started(self):
        """Discovery started."""
        _LOGGER.info("Started discovery")

    # pylint: disable=no-self-use
    def discovery_finished(self):
        """Discovery finished."""
        _LOGGER.info("Finished discovery")

    # pylint: disable=no-self-use
    def controller_added(self, nuimo):
        """Return that a controller was found."""
        _LOGGER.info("Added Nuimo: %s", nuimo)
