<filename>homeassistant/components/dlink/switch.py
"""Support for D-Link W215 smart switch."""
from datetime import timedelta
import logging
import urllib

import voluptuous as vol

from homeassistant.components.switch import PLATFORM_SCHEMA, SwitchDevice
from homeassistant.const import (
    ATTR_TEMPERATURE, CONF_HOST, CONF_NAME, CONF_PASSWORD, CONF_USERNAME,
    TEMP_CELSIUS)
import homeassistant.helpers.config_validation as cv
from homeassistant.util import dt as dt_util

REQUIREMENTS = ['pyW215==0.6.0']

_LOGGER = logging.getLogger(__name__)

ATTR_TOTAL_CONSUMPTION = 'total_consumption'

CONF_USE_LEGACY_PROTOCOL = 'use_legacy_protocol'

DEFAULT_NAME = "D-Link Smart Plug W215"
DEFAULT_PASSWORD = ''
DEFAULT_USERNAME = 'admin'

SCAN_INTERVAL = timedelta(minutes=2)

PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
    vol.Required(CONF_HOST): cv.string,
    vol.Required(CONF_PASSWORD, default=DEFAULT_PASSWORD): cv.string,
    vol.Required(CONF_USERNAME, default=DEFAULT_USERNAME): cv.string,
    vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string,
    vol.Optional(CONF_USE_LEGACY_PROTOCOL, default=False): cv.boolean,
})


def setup_platform(hass, config, add_entities, discovery_info=None):
    """Set up a D-Link Smart Plug."""
    from pyW215.pyW215 import SmartPlug

    host = config.get(CONF_HOST)
    username = config.get(CONF_USERNAME)
    password = config.get(CONF_PASSWORD)
    use_legacy_protocol = config.get(CONF_USE_LEGACY_PROTOCOL)
    name = config.get(CONF_NAME)

    smartplug = SmartPlug(host, password, username, use_legacy_protocol)
    data = SmartPlugData(smartplug)

    add_entities([SmartPlugSwitch(hass, data, name)], True)


class SmartPlugSwitch(SwitchDevice):
    """Representation of a D-Link Smart Plug switch."""

    def __init__(self, hass, data, name):
        """Initialize the switch."""
        self.units = hass.config.units
        self.data = data
        self._name = name

    @property
    def name(self):
        """Return the name of the Smart Plug."""
        return self._name

    @property
    def device_state_attributes(self):
        """Return the state attributes of the device."""
        try:
            ui_temp = self.units.temperature(
                int(self.data.temperature), TEMP_CELSIUS)
            temperature = ui_temp
        except (ValueError, TypeError):
            temperature = None

        try:
            total_consumption = float(self.data.total_consumption)
        except (ValueError, TypeError):
            total_consumption = None

        attrs = {
            ATTR_TOTAL_CONSUMPTION: total_consumption,
            ATTR_TEMPERATURE: temperature,
        }

        return attrs

    @property
    def current_power_w(self):
        """Return the current power usage in Watt."""
        try:
            return float(self.data.current_consumption)
        except (ValueError, TypeError):
            return None

    @property
    def is_on(self):
        """Return true if switch is on."""
        return self.data.state == 'ON'

    def turn_on(self, **kwargs):
        """Turn the switch on."""
        self.data.smartplug.state = 'ON'

    def turn_off(self, **kwargs):
        """Turn the switch off."""
        self.data.smartplug.state = 'OFF'

    def update(self):
        """Get the latest data from the smart plug and updates the states."""
        self.data.update()

    @property
    def available(self) -> bool:
        """Return True if entity is available."""
        return self.data.available


class SmartPlugData:
    """Get the latest data from smart plug."""

    def __init__(self, smartplug):
        """Initialize the data object."""
        self.smartplug = smartplug
        self.state = None
        self.temperature = None
        self.current_consumption = None
        self.total_consumption = None
        self.available = False
        self._n_tried = 0
        self._last_tried = None

    def update(self):
        """Get the latest data from the smart plug."""
        if self._last_tried is not None:
            last_try_s = (dt_util.now() - self._last_tried).total_seconds()/60
            retry_seconds = min(self._n_tried*2, 10) - last_try_s
            if self._n_tried > 0 and retry_seconds > 0:
                _LOGGER.warning("Waiting %s s to retry", retry_seconds)
                return

        _state = 'unknown'

        try:
            self._last_tried = dt_util.now()
            _state = self.smartplug.state
        except urllib.error.HTTPError:
            _LOGGER.error("D-Link connection problem")
        if _state == 'unknown':
            self._n_tried += 1
            self.available = False
            _LOGGER.warning("Failed to connect to D-Link switch")
            return

        self.state = _state
        self.available = True

        self.temperature = self.smartplug.temperature
        self.current_consumption = self.smartplug.current_consumption
        self.total_consumption = self.smartplug.total_consumption
        self._n_tried = 0

<filename>homeassistant/components/dlink/switch.py
"""Support for D-Link W215 smart switch."""
from datetime import timedelta
import logging
import urllib

import voluptuous as vol

from homeassistant.components.switch import PLATFORM_SCHEMA, SwitchDevice
from homeassistant.const import (
    ATTR_TEMPERATURE, CONF_HOST, CONF_NAME, CONF_PASSWORD, CONF_USERNAME,
    TEMP_CELSIUS)
import homeassistant.helpers.config_validation as cv
from homeassistant.util import dt as dt_util

REQUIREMENTS = ['pyW215==0.6.0']

_LOGGER = logging.getLogger(__name__)

ATTR_TOTAL_CONSUMPTION = 'total_consumption'

CONF_USE_LEGACY_PROTOCOL = 'use_legacy_protocol'

DEFAULT_NAME = "D-Link Smart Plug W215"
DEFAULT_PASSWORD = ''
DEFAULT_USERNAME = 'admin'

SCAN_INTERVAL = timedelta(minutes=2)

PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
    vol.Required(CONF_HOST): cv.string,
    vol.Required(CONF_PASSWORD, default=DEFAULT_PASSWORD): cv.string,
    vol.Required(CONF_USERNAME, default=DEFAULT_USERNAME): cv.string,
    vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string,
    vol.Optional(CONF_USE_LEGACY_PROTOCOL, default=False): cv.boolean,
})


def setup_platform(hass, config, add_entities, discovery_info=None):
    """Set up a D-Link Smart Plug."""
    from pyW215.pyW215 import SmartPlug

    host = config.get(CONF_HOST)
    username = config.get(CONF_USERNAME)
    password = config.get(CONF_PASSWORD)
    use_legacy_protocol = config.get(CONF_USE_LEGACY_PROTOCOL)
    name = config.get(CONF_NAME)

    smartplug = SmartPlug(host, password, username, use_legacy_protocol)
    data = SmartPlugData(smartplug)

    add_entities([SmartPlugSwitch(hass, data, name)], True)


class SmartPlugSwitch(SwitchDevice):
    """Representation of a D-Link Smart Plug switch."""

    def __init__(self, hass, data, name):
        """Initialize the switch."""
        self.units = hass.config.units
        self.data = data
        self._name = name

    @property
    def name(self):
        """Return the name of the Smart Plug."""
        return self._name

    @property
    def device_state_attributes(self):
        """Return the state attributes of the device."""
        try:
            ui_temp = self.units.temperature(
                int(self.data.temperature), TEMP_CELSIUS)
            temperature = ui_temp
        except (ValueError, TypeError):
            temperature = None

        try:
            total_consumption = float(self.data.total_consumption)
        except (ValueError, TypeError):
            total_consumption = None

        attrs = {
            ATTR_TOTAL_CONSUMPTION: total_consumption,
            ATTR_TEMPERATURE: temperature,
        }

        return attrs

    @property
    def current_power_w(self):
        """Return the current power usage in Watt."""
        try:
            return float(self.data.current_consumption)
        except (ValueError, TypeError):
            return None

    @property
    def is_on(self):
        """Return true if switch is on."""
        return self.data.state == 'ON'

    def turn_on(self, **kwargs):
        """Turn the switch on."""
        self.data.smartplug.state = 'ON'

    def turn_off(self, **kwargs):
        """Turn the switch off."""
        self.data.smartplug.state = 'OFF'

    def update(self):
        """Get the latest data from the smart plug and updates the states."""
        self.data.update()

    @property
    def available(self) -> bool:
        """Return True if entity is available."""
        return self.data.available


class SmartPlugData:
    """Get the latest data from smart plug."""

    def __init__(self, smartplug):
        """Initialize the data object."""
        self.smartplug = smartplug
        self.state = None
        self.temperature = None
        self.current_consumption = None
        self.total_consumption = None
        self.available = False
        self._n_tried = 0
        self._last_tried = None

    def update(self):
        """Get the latest data from the smart plug."""
        if self._last_tried is not None:
            last_try_s = (dt_util.now() - self._last_tried).total_seconds()/60
            retry_seconds = min(self._n_tried*2, 10) - last_try_s
            if self._n_tried > 0 and retry_seconds > 0:
                _LOGGER.warning("Waiting %s s to retry", retry_seconds)
                return

        _state = 'unknown'

        try:
            self._last_tried = dt_util.now()
            _state = self.smartplug.state
        except urllib.error.HTTPError:
            _LOGGER.error("D-Link connection problem")
        if _state == 'unknown':
            self._n_tried += 1
            self.available = False
            _LOGGER.warning("Failed to connect to D-Link switch")
            return

        self.state = _state
        self.available = True

        self.temperature = self.smartplug.temperature
        self.current_consumption = self.smartplug.current_consumption
        self.total_consumption = self.smartplug.total_consumption
        self._n_tried = 0

Support for D-Link W215 smart switch. Set up a D-Link Smart Plug. Representation of a D-Link Smart Plug switch. Initialize the switch. Return the name of the Smart Plug. Return the state attributes of the device. Return the current power usage in Watt. Return true if switch is on. Turn the switch on. Turn the switch off. Get the latest data from the smart plug and updates the states. Return True if entity is available. Get the latest data from smart plug. Initialize the data object. Get the latest data from the smart plug.