"""
Support turning on/off motion detection on Hikvision cameras.

For more details about this platform, please refer to the documentation at
https://home-assistant.io/components/switch.hikvision/
"""
import logging

import voluptuous as vol

from homeassistant.components.sensor import PLATFORM_SCHEMA
from homeassistant.const import (
    CONF_NAME, CONF_HOST, CONF_PASSWORD, CONF_USERNAME, CONF_PORT, STATE_OFF,
    STATE_ON)
from homeassistant.helpers.entity import ToggleEntity
import homeassistant.helpers.config_validation as cv

REQUIREMENTS = ['hikvision==0.4']

_LOGGING = logging.getLogger(__name__)

DEFAULT_NAME = 'Hikvision Camera Motion Detection'
DEFAULT_PASSWORD = '12345'
DEFAULT_PORT = 80
DEFAULT_USERNAME = 'admin'

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


def setup_platform(hass, config, add_devices, discovery_info=None):
    """Setup Hikvision camera."""
    import hikvision.api
    from hikvision.error import HikvisionError, MissingParamError

    host = config.get(CONF_HOST)
    port = config.get(CONF_PORT)
    name = config.get(CONF_NAME)
    username = config.get(CONF_USERNAME)
    password = config.get(CONF_PASSWORD)

    try:
        hikvision_cam = hikvision.api.CreateDevice(
            host, port=port, username=username, password=password,
            is_https=False)
    except MissingParamError as param_err:
        _LOGGING.error("Missing required param: %s", param_err)
        return False
    except HikvisionError as conn_err:
        _LOGGING.error("Unable to connect: %s", conn_err)
        return False

    add_devices([HikvisionMotionSwitch(name, hikvision_cam)])


class HikvisionMotionSwitch(ToggleEntity):
    """Representation of a switch to toggle on/off motion detection."""

    def __init__(self, name, hikvision_cam):
        """Initialize the switch."""
        self._name = name
        self._hikvision_cam = hikvision_cam
        self._state = STATE_OFF

    @property
    def should_poll(self):
        """Poll for status regularly."""
        return True

    @property
    def name(self):
        """Return the name of the device if any."""
        return self._name

    @property
    def state(self):
        """Return the state of the device if any."""
        return self._state

    @property
    def is_on(self):
        """Return true if device is on."""
        return self._state == STATE_ON

    def turn_on(self, **kwargs):
        """Turn the device on."""
        _LOGGING.info("Turning on Motion Detection ")
        self._hikvision_cam.enable_motion_detection()

    def turn_off(self, **kwargs):
        """Turn the device off."""
        _LOGGING.info("Turning off Motion Detection ")
        self._hikvision_cam.disable_motion_detection()

    def update(self):
        """Update Motion Detection state."""
        enabled = self._hikvision_cam.is_motion_detection_enabled()
        _LOGGING.info("enabled: %s", enabled)

        self._state = STATE_ON if enabled else STATE_OFF
