"""Support for testing internet speed via Speedtest.net."""
import logging
from datetime import timedelta

import voluptuous as vol

import homeassistant.helpers.config_validation as cv
from homeassistant.components.sensor import DOMAIN as SENSOR_DOMAIN
from homeassistant.const import (
    CONF_MONITORED_CONDITIONS, CONF_SCAN_INTERVAL
)
from homeassistant.helpers.discovery import async_load_platform
from homeassistant.helpers.dispatcher import dispatcher_send
from homeassistant.helpers.event import async_track_time_interval
from .const import DATA_UPDATED, DOMAIN, SENSOR_TYPES

_LOGGER = logging.getLogger(__name__)

CONF_SERVER_ID = 'server_id'
CONF_MANUAL = 'manual'

DEFAULT_INTERVAL = timedelta(hours=1)

CONFIG_SCHEMA = vol.Schema({
    DOMAIN: vol.Schema({
        vol.Optional(CONF_SERVER_ID): cv.positive_int,
        vol.Optional(CONF_SCAN_INTERVAL, default=DEFAULT_INTERVAL):
            vol.All(cv.time_period, cv.positive_timedelta),
        vol.Optional(CONF_MANUAL, default=False): cv.boolean,
        vol.Optional(
            CONF_MONITORED_CONDITIONS, default=list(SENSOR_TYPES)
        ): vol.All(cv.ensure_list, [vol.In(list(SENSOR_TYPES))])
    })
}, extra=vol.ALLOW_EXTRA)


async def async_setup(hass, config):
    """Set up the Speedtest.net component."""
    conf = config[DOMAIN]
    data = hass.data[DOMAIN] = SpeedtestData(hass, conf.get(CONF_SERVER_ID))

    if not conf[CONF_MANUAL]:
        async_track_time_interval(
            hass, data.update, conf[CONF_SCAN_INTERVAL])

    def update(call=None):
        """Service call to manually update the data."""
        data.update()

    hass.services.async_register(DOMAIN, 'speedtest', update)

    hass.async_create_task(
        async_load_platform(
            hass, SENSOR_DOMAIN, DOMAIN, conf[CONF_MONITORED_CONDITIONS],
            config))

    return True


class SpeedtestData:
    """Get the latest data from speedtest.net."""

    def __init__(self, hass, server_id):
        """Initialize the data object."""
        self.data = None
        self._hass = hass
        self._servers = [] if server_id is None else [server_id]

    def update(self, now=None):
        """Get the latest data from speedtest.net."""
        import speedtest
        _LOGGER.debug("Executing speedtest.net speed test")
        speed = speedtest.Speedtest()
        speed.get_servers(self._servers)
        speed.get_best_server()
        speed.download()
        speed.upload()
        self.data = speed.results.dict()
        dispatcher_send(self._hass, DATA_UPDATED)